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-rw-r--r--media/libvpx/vp8/common/arm/armv6/bilinearfilter_v6.asm237
-rw-r--r--media/libvpx/vp8/common/arm/armv6/copymem16x16_v6.asm186
-rw-r--r--media/libvpx/vp8/common/arm/armv6/copymem8x4_v6.asm128
-rw-r--r--media/libvpx/vp8/common/arm/armv6/copymem8x8_v6.asm128
-rw-r--r--media/libvpx/vp8/common/arm/armv6/dc_only_idct_add_v6.asm70
-rw-r--r--media/libvpx/vp8/common/arm/armv6/dequant_idct_v6.asm190
-rw-r--r--media/libvpx/vp8/common/arm/armv6/dequantize_v6.asm69
-rw-r--r--media/libvpx/vp8/common/arm/armv6/filter_v6.asm624
-rw-r--r--media/libvpx/vp8/common/arm/armv6/idct_blk_v6.c115
-rw-r--r--media/libvpx/vp8/common/arm/armv6/idct_v6.asm202
-rw-r--r--media/libvpx/vp8/common/arm/armv6/intra4x4_predict_v6.asm611
-rw-r--r--media/libvpx/vp8/common/arm/armv6/iwalsh_v6.asm136
-rw-r--r--media/libvpx/vp8/common/arm/armv6/loopfilter_v6.asm1282
-rw-r--r--media/libvpx/vp8/common/arm/armv6/simpleloopfilter_v6.asm286
-rw-r--r--media/libvpx/vp8/common/arm/armv6/sixtappredict8x4_v6.asm273
-rw-r--r--media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_h_armv6.asm182
-rw-r--r--media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_hv_armv6.asm222
-rw-r--r--media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_v_armv6.asm184
18 files changed, 5125 insertions, 0 deletions
diff --git a/media/libvpx/vp8/common/arm/armv6/bilinearfilter_v6.asm b/media/libvpx/vp8/common/arm/armv6/bilinearfilter_v6.asm
new file mode 100644
index 000000000..9704b4210
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/bilinearfilter_v6.asm
@@ -0,0 +1,237 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_filter_block2d_bil_first_pass_armv6|
+ EXPORT |vp8_filter_block2d_bil_second_pass_armv6|
+
+ AREA |.text|, CODE, READONLY ; name this block of code
+
+;-------------------------------------
+; r0 unsigned char *src_ptr,
+; r1 unsigned short *dst_ptr,
+; r2 unsigned int src_pitch,
+; r3 unsigned int height,
+; stack unsigned int width,
+; stack const short *vp8_filter
+;-------------------------------------
+; The output is transposed stroed in output array to make it easy for second pass filtering.
+|vp8_filter_block2d_bil_first_pass_armv6| PROC
+ stmdb sp!, {r4 - r11, lr}
+
+ ldr r11, [sp, #40] ; vp8_filter address
+ ldr r4, [sp, #36] ; width
+
+ mov r12, r3 ; outer-loop counter
+
+ add r7, r2, r4 ; preload next row
+ pld [r0, r7]
+
+ sub r2, r2, r4 ; src increment for height loop
+
+ ldr r5, [r11] ; load up filter coefficients
+
+ mov r3, r3, lsl #1 ; height*2
+ add r3, r3, #2 ; plus 2 to make output buffer 4-bit aligned since height is actually (height+1)
+
+ mov r11, r1 ; save dst_ptr for each row
+
+ cmp r5, #128 ; if filter coef = 128, then skip the filter
+ beq bil_null_1st_filter
+
+|bil_height_loop_1st_v6|
+ ldrb r6, [r0] ; load source data
+ ldrb r7, [r0, #1]
+ ldrb r8, [r0, #2]
+ mov lr, r4, lsr #2 ; 4-in-parellel loop counter
+
+|bil_width_loop_1st_v6|
+ ldrb r9, [r0, #3]
+ ldrb r10, [r0, #4]
+
+ pkhbt r6, r6, r7, lsl #16 ; src[1] | src[0]
+ pkhbt r7, r7, r8, lsl #16 ; src[2] | src[1]
+
+ smuad r6, r6, r5 ; apply the filter
+ pkhbt r8, r8, r9, lsl #16 ; src[3] | src[2]
+ smuad r7, r7, r5
+ pkhbt r9, r9, r10, lsl #16 ; src[4] | src[3]
+
+ smuad r8, r8, r5
+ smuad r9, r9, r5
+
+ add r0, r0, #4
+ subs lr, lr, #1
+
+ add r6, r6, #0x40 ; round_shift_and_clamp
+ add r7, r7, #0x40
+ usat r6, #16, r6, asr #7
+ usat r7, #16, r7, asr #7
+
+ strh r6, [r1], r3 ; result is transposed and stored
+
+ add r8, r8, #0x40 ; round_shift_and_clamp
+ strh r7, [r1], r3
+ add r9, r9, #0x40
+ usat r8, #16, r8, asr #7
+ usat r9, #16, r9, asr #7
+
+ strh r8, [r1], r3 ; result is transposed and stored
+
+ ldrneb r6, [r0] ; load source data
+ strh r9, [r1], r3
+
+ ldrneb r7, [r0, #1]
+ ldrneb r8, [r0, #2]
+
+ bne bil_width_loop_1st_v6
+
+ add r0, r0, r2 ; move to next input row
+ subs r12, r12, #1
+
+ add r9, r2, r4, lsl #1 ; adding back block width
+ pld [r0, r9] ; preload next row
+
+ add r11, r11, #2 ; move over to next column
+ mov r1, r11
+
+ bne bil_height_loop_1st_v6
+
+ ldmia sp!, {r4 - r11, pc}
+
+|bil_null_1st_filter|
+|bil_height_loop_null_1st|
+ mov lr, r4, lsr #2 ; loop counter
+
+|bil_width_loop_null_1st|
+ ldrb r6, [r0] ; load data
+ ldrb r7, [r0, #1]
+ ldrb r8, [r0, #2]
+ ldrb r9, [r0, #3]
+
+ strh r6, [r1], r3 ; store it to immediate buffer
+ add r0, r0, #4
+ strh r7, [r1], r3
+ subs lr, lr, #1
+ strh r8, [r1], r3
+ strh r9, [r1], r3
+
+ bne bil_width_loop_null_1st
+
+ subs r12, r12, #1
+ add r0, r0, r2 ; move to next input line
+ add r11, r11, #2 ; move over to next column
+ mov r1, r11
+
+ bne bil_height_loop_null_1st
+
+ ldmia sp!, {r4 - r11, pc}
+
+ ENDP ; |vp8_filter_block2d_bil_first_pass_armv6|
+
+
+;---------------------------------
+; r0 unsigned short *src_ptr,
+; r1 unsigned char *dst_ptr,
+; r2 int dst_pitch,
+; r3 unsigned int height,
+; stack unsigned int width,
+; stack const short *vp8_filter
+;---------------------------------
+|vp8_filter_block2d_bil_second_pass_armv6| PROC
+ stmdb sp!, {r4 - r11, lr}
+
+ ldr r11, [sp, #40] ; vp8_filter address
+ ldr r4, [sp, #36] ; width
+
+ ldr r5, [r11] ; load up filter coefficients
+ mov r12, r4 ; outer-loop counter = width, since we work on transposed data matrix
+ mov r11, r1
+
+ cmp r5, #128 ; if filter coef = 128, then skip the filter
+ beq bil_null_2nd_filter
+
+|bil_height_loop_2nd|
+ ldr r6, [r0] ; load the data
+ ldr r8, [r0, #4]
+ ldrh r10, [r0, #8]
+ mov lr, r3, lsr #2 ; loop counter
+
+|bil_width_loop_2nd|
+ pkhtb r7, r6, r8 ; src[1] | src[2]
+ pkhtb r9, r8, r10 ; src[3] | src[4]
+
+ smuad r6, r6, r5 ; apply filter
+ smuad r8, r8, r5 ; apply filter
+
+ subs lr, lr, #1
+
+ smuadx r7, r7, r5 ; apply filter
+ smuadx r9, r9, r5 ; apply filter
+
+ add r0, r0, #8
+
+ add r6, r6, #0x40 ; round_shift_and_clamp
+ add r7, r7, #0x40
+ usat r6, #8, r6, asr #7
+ usat r7, #8, r7, asr #7
+ strb r6, [r1], r2 ; the result is transposed back and stored
+
+ add r8, r8, #0x40 ; round_shift_and_clamp
+ strb r7, [r1], r2
+ add r9, r9, #0x40
+ usat r8, #8, r8, asr #7
+ usat r9, #8, r9, asr #7
+ strb r8, [r1], r2 ; the result is transposed back and stored
+
+ ldrne r6, [r0] ; load data
+ strb r9, [r1], r2
+ ldrne r8, [r0, #4]
+ ldrneh r10, [r0, #8]
+
+ bne bil_width_loop_2nd
+
+ subs r12, r12, #1
+ add r0, r0, #4 ; update src for next row
+ add r11, r11, #1
+ mov r1, r11
+
+ bne bil_height_loop_2nd
+ ldmia sp!, {r4 - r11, pc}
+
+|bil_null_2nd_filter|
+|bil_height_loop_null_2nd|
+ mov lr, r3, lsr #2
+
+|bil_width_loop_null_2nd|
+ ldr r6, [r0], #4 ; load data
+ subs lr, lr, #1
+ ldr r8, [r0], #4
+
+ strb r6, [r1], r2 ; store data
+ mov r7, r6, lsr #16
+ strb r7, [r1], r2
+ mov r9, r8, lsr #16
+ strb r8, [r1], r2
+ strb r9, [r1], r2
+
+ bne bil_width_loop_null_2nd
+
+ subs r12, r12, #1
+ add r0, r0, #4
+ add r11, r11, #1
+ mov r1, r11
+
+ bne bil_height_loop_null_2nd
+
+ ldmia sp!, {r4 - r11, pc}
+ ENDP ; |vp8_filter_block2d_second_pass_armv6|
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/copymem16x16_v6.asm b/media/libvpx/vp8/common/arm/armv6/copymem16x16_v6.asm
new file mode 100644
index 000000000..abf048c2f
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/copymem16x16_v6.asm
@@ -0,0 +1,186 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_copy_mem16x16_v6|
+ ; ARM
+ ; REQUIRE8
+ ; PRESERVE8
+
+ AREA Block, CODE, READONLY ; name this block of code
+;void copy_mem16x16_v6( unsigned char *src, int src_stride, unsigned char *dst, int dst_stride)
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
+|vp8_copy_mem16x16_v6| PROC
+ stmdb sp!, {r4 - r7}
+ ;push {r4-r7}
+
+ ;preload
+ pld [r0, #31] ; preload for next 16x16 block
+
+ ands r4, r0, #15
+ beq copy_mem16x16_fast
+
+ ands r4, r0, #7
+ beq copy_mem16x16_8
+
+ ands r4, r0, #3
+ beq copy_mem16x16_4
+
+ ;copy one byte each time
+ ldrb r4, [r0]
+ ldrb r5, [r0, #1]
+ ldrb r6, [r0, #2]
+ ldrb r7, [r0, #3]
+
+ mov r12, #16
+
+copy_mem16x16_1_loop
+ strb r4, [r2]
+ strb r5, [r2, #1]
+ strb r6, [r2, #2]
+ strb r7, [r2, #3]
+
+ ldrb r4, [r0, #4]
+ ldrb r5, [r0, #5]
+ ldrb r6, [r0, #6]
+ ldrb r7, [r0, #7]
+
+ subs r12, r12, #1
+
+ strb r4, [r2, #4]
+ strb r5, [r2, #5]
+ strb r6, [r2, #6]
+ strb r7, [r2, #7]
+
+ ldrb r4, [r0, #8]
+ ldrb r5, [r0, #9]
+ ldrb r6, [r0, #10]
+ ldrb r7, [r0, #11]
+
+ strb r4, [r2, #8]
+ strb r5, [r2, #9]
+ strb r6, [r2, #10]
+ strb r7, [r2, #11]
+
+ ldrb r4, [r0, #12]
+ ldrb r5, [r0, #13]
+ ldrb r6, [r0, #14]
+ ldrb r7, [r0, #15]
+
+ add r0, r0, r1
+
+ strb r4, [r2, #12]
+ strb r5, [r2, #13]
+ strb r6, [r2, #14]
+ strb r7, [r2, #15]
+
+ add r2, r2, r3
+
+ ldrneb r4, [r0]
+ ldrneb r5, [r0, #1]
+ ldrneb r6, [r0, #2]
+ ldrneb r7, [r0, #3]
+
+ pld [r0, #31] ; preload for next 16x16 block
+
+ bne copy_mem16x16_1_loop
+
+ ldmia sp!, {r4 - r7}
+ ;pop {r4-r7}
+ mov pc, lr
+
+;copy 4 bytes each time
+copy_mem16x16_4
+ ldr r4, [r0]
+ ldr r5, [r0, #4]
+ ldr r6, [r0, #8]
+ ldr r7, [r0, #12]
+
+ mov r12, #16
+
+copy_mem16x16_4_loop
+ subs r12, r12, #1
+ add r0, r0, r1
+
+ str r4, [r2]
+ str r5, [r2, #4]
+ str r6, [r2, #8]
+ str r7, [r2, #12]
+
+ add r2, r2, r3
+
+ ldrne r4, [r0]
+ ldrne r5, [r0, #4]
+ ldrne r6, [r0, #8]
+ ldrne r7, [r0, #12]
+
+ pld [r0, #31] ; preload for next 16x16 block
+
+ bne copy_mem16x16_4_loop
+
+ ldmia sp!, {r4 - r7}
+ ;pop {r4-r7}
+ mov pc, lr
+
+;copy 8 bytes each time
+copy_mem16x16_8
+ sub r1, r1, #16
+ sub r3, r3, #16
+
+ mov r12, #16
+
+copy_mem16x16_8_loop
+ ldmia r0!, {r4-r5}
+ ;ldm r0, {r4-r5}
+ ldmia r0!, {r6-r7}
+
+ add r0, r0, r1
+
+ stmia r2!, {r4-r5}
+ subs r12, r12, #1
+ ;stm r2, {r4-r5}
+ stmia r2!, {r6-r7}
+
+ add r2, r2, r3
+
+ pld [r0, #31] ; preload for next 16x16 block
+ bne copy_mem16x16_8_loop
+
+ ldmia sp!, {r4 - r7}
+ ;pop {r4-r7}
+ mov pc, lr
+
+;copy 16 bytes each time
+copy_mem16x16_fast
+ ;sub r1, r1, #16
+ ;sub r3, r3, #16
+
+ mov r12, #16
+
+copy_mem16x16_fast_loop
+ ldmia r0, {r4-r7}
+ ;ldm r0, {r4-r7}
+ add r0, r0, r1
+
+ subs r12, r12, #1
+ stmia r2, {r4-r7}
+ ;stm r2, {r4-r7}
+ add r2, r2, r3
+
+ pld [r0, #31] ; preload for next 16x16 block
+ bne copy_mem16x16_fast_loop
+
+ ldmia sp!, {r4 - r7}
+ ;pop {r4-r7}
+ mov pc, lr
+
+ ENDP ; |vp8_copy_mem16x16_v6|
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/copymem8x4_v6.asm b/media/libvpx/vp8/common/arm/armv6/copymem8x4_v6.asm
new file mode 100644
index 000000000..d8362ef05
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/copymem8x4_v6.asm
@@ -0,0 +1,128 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_copy_mem8x4_v6|
+ ; ARM
+ ; REQUIRE8
+ ; PRESERVE8
+
+ AREA Block, CODE, READONLY ; name this block of code
+;void vp8_copy_mem8x4_v6( unsigned char *src, int src_stride, unsigned char *dst, int dst_stride)
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
+|vp8_copy_mem8x4_v6| PROC
+ ;push {r4-r5}
+ stmdb sp!, {r4-r5}
+
+ ;preload
+ pld [r0]
+ pld [r0, r1]
+ pld [r0, r1, lsl #1]
+
+ ands r4, r0, #7
+ beq copy_mem8x4_fast
+
+ ands r4, r0, #3
+ beq copy_mem8x4_4
+
+ ;copy 1 byte each time
+ ldrb r4, [r0]
+ ldrb r5, [r0, #1]
+
+ mov r12, #4
+
+copy_mem8x4_1_loop
+ strb r4, [r2]
+ strb r5, [r2, #1]
+
+ ldrb r4, [r0, #2]
+ ldrb r5, [r0, #3]
+
+ subs r12, r12, #1
+
+ strb r4, [r2, #2]
+ strb r5, [r2, #3]
+
+ ldrb r4, [r0, #4]
+ ldrb r5, [r0, #5]
+
+ strb r4, [r2, #4]
+ strb r5, [r2, #5]
+
+ ldrb r4, [r0, #6]
+ ldrb r5, [r0, #7]
+
+ add r0, r0, r1
+
+ strb r4, [r2, #6]
+ strb r5, [r2, #7]
+
+ add r2, r2, r3
+
+ ldrneb r4, [r0]
+ ldrneb r5, [r0, #1]
+
+ bne copy_mem8x4_1_loop
+
+ ldmia sp!, {r4 - r5}
+ ;pop {r4-r5}
+ mov pc, lr
+
+;copy 4 bytes each time
+copy_mem8x4_4
+ ldr r4, [r0]
+ ldr r5, [r0, #4]
+
+ mov r12, #4
+
+copy_mem8x4_4_loop
+ subs r12, r12, #1
+ add r0, r0, r1
+
+ str r4, [r2]
+ str r5, [r2, #4]
+
+ add r2, r2, r3
+
+ ldrne r4, [r0]
+ ldrne r5, [r0, #4]
+
+ bne copy_mem8x4_4_loop
+
+ ldmia sp!, {r4-r5}
+ ;pop {r4-r5}
+ mov pc, lr
+
+;copy 8 bytes each time
+copy_mem8x4_fast
+ ;sub r1, r1, #8
+ ;sub r3, r3, #8
+
+ mov r12, #4
+
+copy_mem8x4_fast_loop
+ ldmia r0, {r4-r5}
+ ;ldm r0, {r4-r5}
+ add r0, r0, r1
+
+ subs r12, r12, #1
+ stmia r2, {r4-r5}
+ ;stm r2, {r4-r5}
+ add r2, r2, r3
+
+ bne copy_mem8x4_fast_loop
+
+ ldmia sp!, {r4-r5}
+ ;pop {r4-r5}
+ mov pc, lr
+
+ ENDP ; |vp8_copy_mem8x4_v6|
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/copymem8x8_v6.asm b/media/libvpx/vp8/common/arm/armv6/copymem8x8_v6.asm
new file mode 100644
index 000000000..c6a60c610
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/copymem8x8_v6.asm
@@ -0,0 +1,128 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_copy_mem8x8_v6|
+ ; ARM
+ ; REQUIRE8
+ ; PRESERVE8
+
+ AREA Block, CODE, READONLY ; name this block of code
+;void copy_mem8x8_v6( unsigned char *src, int src_stride, unsigned char *dst, int dst_stride)
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
+|vp8_copy_mem8x8_v6| PROC
+ ;push {r4-r5}
+ stmdb sp!, {r4-r5}
+
+ ;preload
+ pld [r0]
+ pld [r0, r1]
+ pld [r0, r1, lsl #1]
+
+ ands r4, r0, #7
+ beq copy_mem8x8_fast
+
+ ands r4, r0, #3
+ beq copy_mem8x8_4
+
+ ;copy 1 byte each time
+ ldrb r4, [r0]
+ ldrb r5, [r0, #1]
+
+ mov r12, #8
+
+copy_mem8x8_1_loop
+ strb r4, [r2]
+ strb r5, [r2, #1]
+
+ ldrb r4, [r0, #2]
+ ldrb r5, [r0, #3]
+
+ subs r12, r12, #1
+
+ strb r4, [r2, #2]
+ strb r5, [r2, #3]
+
+ ldrb r4, [r0, #4]
+ ldrb r5, [r0, #5]
+
+ strb r4, [r2, #4]
+ strb r5, [r2, #5]
+
+ ldrb r4, [r0, #6]
+ ldrb r5, [r0, #7]
+
+ add r0, r0, r1
+
+ strb r4, [r2, #6]
+ strb r5, [r2, #7]
+
+ add r2, r2, r3
+
+ ldrneb r4, [r0]
+ ldrneb r5, [r0, #1]
+
+ bne copy_mem8x8_1_loop
+
+ ldmia sp!, {r4 - r5}
+ ;pop {r4-r5}
+ mov pc, lr
+
+;copy 4 bytes each time
+copy_mem8x8_4
+ ldr r4, [r0]
+ ldr r5, [r0, #4]
+
+ mov r12, #8
+
+copy_mem8x8_4_loop
+ subs r12, r12, #1
+ add r0, r0, r1
+
+ str r4, [r2]
+ str r5, [r2, #4]
+
+ add r2, r2, r3
+
+ ldrne r4, [r0]
+ ldrne r5, [r0, #4]
+
+ bne copy_mem8x8_4_loop
+
+ ldmia sp!, {r4 - r5}
+ ;pop {r4-r5}
+ mov pc, lr
+
+;copy 8 bytes each time
+copy_mem8x8_fast
+ ;sub r1, r1, #8
+ ;sub r3, r3, #8
+
+ mov r12, #8
+
+copy_mem8x8_fast_loop
+ ldmia r0, {r4-r5}
+ ;ldm r0, {r4-r5}
+ add r0, r0, r1
+
+ subs r12, r12, #1
+ stmia r2, {r4-r5}
+ ;stm r2, {r4-r5}
+ add r2, r2, r3
+
+ bne copy_mem8x8_fast_loop
+
+ ldmia sp!, {r4-r5}
+ ;pop {r4-r5}
+ mov pc, lr
+
+ ENDP ; |vp8_copy_mem8x8_v6|
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/dc_only_idct_add_v6.asm b/media/libvpx/vp8/common/arm/armv6/dc_only_idct_add_v6.asm
new file mode 100644
index 000000000..9aa659fa7
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/dc_only_idct_add_v6.asm
@@ -0,0 +1,70 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license and patent
+; grant that can be found in the LICENSE file in the root of the source
+; tree. All contributing project authors may be found in the AUTHORS
+; file in the root of the source tree.
+;
+
+ EXPORT |vp8_dc_only_idct_add_v6|
+
+ AREA |.text|, CODE, READONLY
+
+;void vp8_dc_only_idct_add_c(short input_dc, unsigned char *pred_ptr,
+; int pred_stride, unsigned char *dst_ptr,
+; int dst_stride)
+; r0 input_dc
+; r1 pred_ptr
+; r2 pred_stride
+; r3 dst_ptr
+; sp dst_stride
+
+|vp8_dc_only_idct_add_v6| PROC
+ stmdb sp!, {r4 - r7}
+
+ add r0, r0, #4 ; input_dc += 4
+ ldr r12, c0x0000FFFF
+ ldr r4, [r1], r2
+ and r0, r12, r0, asr #3 ; input_dc >> 3 + mask
+ ldr r6, [r1], r2
+ orr r0, r0, r0, lsl #16 ; a1 | a1
+
+ ldr r12, [sp, #16] ; dst stride
+
+ uxtab16 r5, r0, r4 ; a1+2 | a1+0
+ uxtab16 r4, r0, r4, ror #8 ; a1+3 | a1+1
+ uxtab16 r7, r0, r6
+ uxtab16 r6, r0, r6, ror #8
+ usat16 r5, #8, r5
+ usat16 r4, #8, r4
+ usat16 r7, #8, r7
+ usat16 r6, #8, r6
+ orr r5, r5, r4, lsl #8
+ orr r7, r7, r6, lsl #8
+ ldr r4, [r1], r2
+ str r5, [r3], r12
+ ldr r6, [r1]
+ str r7, [r3], r12
+
+ uxtab16 r5, r0, r4
+ uxtab16 r4, r0, r4, ror #8
+ uxtab16 r7, r0, r6
+ uxtab16 r6, r0, r6, ror #8
+ usat16 r5, #8, r5
+ usat16 r4, #8, r4
+ usat16 r7, #8, r7
+ usat16 r6, #8, r6
+ orr r5, r5, r4, lsl #8
+ orr r7, r7, r6, lsl #8
+ str r5, [r3], r12
+ str r7, [r3]
+
+ ldmia sp!, {r4 - r7}
+ bx lr
+
+ ENDP ; |vp8_dc_only_idct_add_v6|
+
+; Constant Pool
+c0x0000FFFF DCD 0x0000FFFF
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/dequant_idct_v6.asm b/media/libvpx/vp8/common/arm/armv6/dequant_idct_v6.asm
new file mode 100644
index 000000000..db48ded58
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/dequant_idct_v6.asm
@@ -0,0 +1,190 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license and patent
+; grant that can be found in the LICENSE file in the root of the source
+; tree. All contributing project authors may be found in the AUTHORS
+; file in the root of the source tree.
+;
+
+ EXPORT |vp8_dequant_idct_add_v6|
+
+ AREA |.text|, CODE, READONLY
+;void vp8_dequant_idct_v6(short *input, short *dq,
+; unsigned char *dest, int stride)
+; r0 = q
+; r1 = dq
+; r2 = dst
+; r3 = stride
+
+|vp8_dequant_idct_add_v6| PROC
+ stmdb sp!, {r4-r11, lr}
+
+ ldr r4, [r0] ;input
+ ldr r5, [r1], #4 ;dq
+
+ sub sp, sp, #4
+ str r3, [sp]
+
+ mov r12, #4
+
+vp8_dequant_add_loop
+ smulbb r6, r4, r5
+ smultt r7, r4, r5
+
+ ldr r4, [r0, #4] ;input
+ ldr r5, [r1], #4 ;dq
+
+ strh r6, [r0], #2
+ strh r7, [r0], #2
+
+ smulbb r6, r4, r5
+ smultt r7, r4, r5
+
+ subs r12, r12, #1
+
+ ldrne r4, [r0, #4]
+ ldrne r5, [r1], #4
+
+ strh r6, [r0], #2
+ strh r7, [r0], #2
+
+ bne vp8_dequant_add_loop
+
+ sub r0, r0, #32
+ mov r1, r0
+
+; short_idct4x4llm_v6_dual
+ ldr r3, cospi8sqrt2minus1
+ ldr r4, sinpi8sqrt2
+ ldr r6, [r0, #8]
+ mov r5, #2
+vp8_dequant_idct_loop1_v6
+ ldr r12, [r0, #24]
+ ldr r14, [r0, #16]
+ smulwt r9, r3, r6
+ smulwb r7, r3, r6
+ smulwt r10, r4, r6
+ smulwb r8, r4, r6
+ pkhbt r7, r7, r9, lsl #16
+ smulwt r11, r3, r12
+ pkhbt r8, r8, r10, lsl #16
+ uadd16 r6, r6, r7
+ smulwt r7, r4, r12
+ smulwb r9, r3, r12
+ smulwb r10, r4, r12
+ subs r5, r5, #1
+ pkhbt r9, r9, r11, lsl #16
+ ldr r11, [r0], #4
+ pkhbt r10, r10, r7, lsl #16
+ uadd16 r7, r12, r9
+ usub16 r7, r8, r7
+ uadd16 r6, r6, r10
+ uadd16 r10, r11, r14
+ usub16 r8, r11, r14
+ uadd16 r9, r10, r6
+ usub16 r10, r10, r6
+ uadd16 r6, r8, r7
+ usub16 r7, r8, r7
+ str r6, [r1, #8]
+ ldrne r6, [r0, #8]
+ str r7, [r1, #16]
+ str r10, [r1, #24]
+ str r9, [r1], #4
+ bne vp8_dequant_idct_loop1_v6
+
+ mov r5, #2
+ sub r0, r1, #8
+vp8_dequant_idct_loop2_v6
+ ldr r6, [r0], #4
+ ldr r7, [r0], #4
+ ldr r8, [r0], #4
+ ldr r9, [r0], #4
+ smulwt r1, r3, r6
+ smulwt r12, r4, r6
+ smulwt lr, r3, r8
+ smulwt r10, r4, r8
+ pkhbt r11, r8, r6, lsl #16
+ pkhbt r1, lr, r1, lsl #16
+ pkhbt r12, r10, r12, lsl #16
+ pkhtb r6, r6, r8, asr #16
+ uadd16 r6, r1, r6
+ pkhbt lr, r9, r7, lsl #16
+ uadd16 r10, r11, lr
+ usub16 lr, r11, lr
+ pkhtb r8, r7, r9, asr #16
+ subs r5, r5, #1
+ smulwt r1, r3, r8
+ smulwb r7, r3, r8
+ smulwt r11, r4, r8
+ smulwb r9, r4, r8
+ pkhbt r1, r7, r1, lsl #16
+ uadd16 r8, r1, r8
+ pkhbt r11, r9, r11, lsl #16
+ usub16 r1, r12, r8
+ uadd16 r8, r11, r6
+ ldr r9, c0x00040004
+ ldr r12, [sp] ; get stride from stack
+ uadd16 r6, r10, r8
+ usub16 r7, r10, r8
+ uadd16 r7, r7, r9
+ uadd16 r6, r6, r9
+ uadd16 r10, r14, r1
+ usub16 r1, r14, r1
+ uadd16 r10, r10, r9
+ uadd16 r1, r1, r9
+ ldr r11, [r2] ; load input from dst
+ mov r8, r7, asr #3
+ pkhtb r9, r8, r10, asr #19
+ mov r8, r1, asr #3
+ pkhtb r8, r8, r6, asr #19
+ uxtb16 lr, r11, ror #8
+ qadd16 r9, r9, lr
+ uxtb16 lr, r11
+ qadd16 r8, r8, lr
+ usat16 r9, #8, r9
+ usat16 r8, #8, r8
+ orr r9, r8, r9, lsl #8
+ ldr r11, [r2, r12] ; load input from dst
+ mov r7, r7, lsl #16
+ mov r1, r1, lsl #16
+ mov r10, r10, lsl #16
+ mov r6, r6, lsl #16
+ mov r7, r7, asr #3
+ pkhtb r7, r7, r10, asr #19
+ mov r1, r1, asr #3
+ pkhtb r1, r1, r6, asr #19
+ uxtb16 r8, r11, ror #8
+ qadd16 r7, r7, r8
+ uxtb16 r8, r11
+ qadd16 r1, r1, r8
+ usat16 r7, #8, r7
+ usat16 r1, #8, r1
+ orr r1, r1, r7, lsl #8
+ str r9, [r2], r12 ; store output to dst
+ str r1, [r2], r12 ; store output to dst
+ bne vp8_dequant_idct_loop2_v6
+
+; memset
+ sub r0, r0, #32
+ add sp, sp, #4
+
+ mov r12, #0
+ str r12, [r0]
+ str r12, [r0, #4]
+ str r12, [r0, #8]
+ str r12, [r0, #12]
+ str r12, [r0, #16]
+ str r12, [r0, #20]
+ str r12, [r0, #24]
+ str r12, [r0, #28]
+
+ ldmia sp!, {r4 - r11, pc}
+ ENDP ; |vp8_dequant_idct_add_v6|
+
+; Constant Pool
+cospi8sqrt2minus1 DCD 0x00004E7B
+sinpi8sqrt2 DCD 0x00008A8C
+c0x00040004 DCD 0x00040004
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/dequantize_v6.asm b/media/libvpx/vp8/common/arm/armv6/dequantize_v6.asm
new file mode 100644
index 000000000..72f7e0ee5
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/dequantize_v6.asm
@@ -0,0 +1,69 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_dequantize_b_loop_v6|
+
+ AREA |.text|, CODE, READONLY ; name this block of code
+;-------------------------------
+;void vp8_dequantize_b_loop_v6(short *Q, short *DQC, short *DQ);
+; r0 short *Q,
+; r1 short *DQC
+; r2 short *DQ
+|vp8_dequantize_b_loop_v6| PROC
+ stmdb sp!, {r4-r9, lr}
+
+ ldr r3, [r0] ;load Q
+ ldr r4, [r1] ;load DQC
+ ldr r5, [r0, #4]
+ ldr r6, [r1, #4]
+
+ mov r12, #2 ;loop counter
+
+dequant_loop
+ smulbb r7, r3, r4 ;multiply
+ smultt r8, r3, r4
+ smulbb r9, r5, r6
+ smultt lr, r5, r6
+
+ ldr r3, [r0, #8]
+ ldr r4, [r1, #8]
+ ldr r5, [r0, #12]
+ ldr r6, [r1, #12]
+
+ strh r7, [r2], #2 ;store result
+ smulbb r7, r3, r4 ;multiply
+ strh r8, [r2], #2
+ smultt r8, r3, r4
+ strh r9, [r2], #2
+ smulbb r9, r5, r6
+ strh lr, [r2], #2
+ smultt lr, r5, r6
+
+ subs r12, r12, #1
+
+ add r0, r0, #16
+ add r1, r1, #16
+
+ ldrne r3, [r0]
+ strh r7, [r2], #2 ;store result
+ ldrne r4, [r1]
+ strh r8, [r2], #2
+ ldrne r5, [r0, #4]
+ strh r9, [r2], #2
+ ldrne r6, [r1, #4]
+ strh lr, [r2], #2
+
+ bne dequant_loop
+
+ ldmia sp!, {r4-r9, pc}
+ ENDP ;|vp8_dequantize_b_loop_v6|
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/filter_v6.asm b/media/libvpx/vp8/common/arm/armv6/filter_v6.asm
new file mode 100644
index 000000000..eb4b75bd8
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/filter_v6.asm
@@ -0,0 +1,624 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_filter_block2d_first_pass_armv6|
+ EXPORT |vp8_filter_block2d_first_pass_16x16_armv6|
+ EXPORT |vp8_filter_block2d_first_pass_8x8_armv6|
+ EXPORT |vp8_filter_block2d_second_pass_armv6|
+ EXPORT |vp8_filter4_block2d_second_pass_armv6|
+ EXPORT |vp8_filter_block2d_first_pass_only_armv6|
+ EXPORT |vp8_filter_block2d_second_pass_only_armv6|
+
+ AREA |.text|, CODE, READONLY ; name this block of code
+;-------------------------------------
+; r0 unsigned char *src_ptr
+; r1 short *output_ptr
+; r2 unsigned int src_pixels_per_line
+; r3 unsigned int output_width
+; stack unsigned int output_height
+; stack const short *vp8_filter
+;-------------------------------------
+; vp8_filter the input and put in the output array. Apply the 6 tap FIR filter with
+; the output being a 2 byte value and the intput being a 1 byte value.
+|vp8_filter_block2d_first_pass_armv6| PROC
+ stmdb sp!, {r4 - r11, lr}
+
+ ldr r11, [sp, #40] ; vp8_filter address
+ ldr r7, [sp, #36] ; output height
+
+ sub r2, r2, r3 ; inside loop increments input array,
+ ; so the height loop only needs to add
+ ; r2 - width to the input pointer
+
+ mov r3, r3, lsl #1 ; multiply width by 2 because using shorts
+ add r12, r3, #16 ; square off the output
+ sub sp, sp, #4
+
+ ldr r4, [r11] ; load up packed filter coefficients
+ ldr r5, [r11, #4]
+ ldr r6, [r11, #8]
+
+ str r1, [sp] ; push destination to stack
+ mov r7, r7, lsl #16 ; height is top part of counter
+
+; six tap filter
+|height_loop_1st_6|
+ ldrb r8, [r0, #-2] ; load source data
+ ldrb r9, [r0, #-1]
+ ldrb r10, [r0], #2
+ orr r7, r7, r3, lsr #2 ; construct loop counter
+
+|width_loop_1st_6|
+ ldrb r11, [r0, #-1]
+
+ pkhbt lr, r8, r9, lsl #16 ; r9 | r8
+ pkhbt r8, r9, r10, lsl #16 ; r10 | r9
+
+ ldrb r9, [r0]
+
+ smuad lr, lr, r4 ; apply the filter
+ pkhbt r10, r10, r11, lsl #16 ; r11 | r10
+ smuad r8, r8, r4
+ pkhbt r11, r11, r9, lsl #16 ; r9 | r11
+
+ smlad lr, r10, r5, lr
+ ldrb r10, [r0, #1]
+ smlad r8, r11, r5, r8
+ ldrb r11, [r0, #2]
+
+ sub r7, r7, #1
+
+ pkhbt r9, r9, r10, lsl #16 ; r10 | r9
+ pkhbt r10, r10, r11, lsl #16 ; r11 | r10
+
+ smlad lr, r9, r6, lr
+ smlad r11, r10, r6, r8
+
+ ands r10, r7, #0xff ; test loop counter
+
+ add lr, lr, #0x40 ; round_shift_and_clamp
+ ldrneb r8, [r0, #-2] ; load data for next loop
+ usat lr, #8, lr, asr #7
+ add r11, r11, #0x40
+ ldrneb r9, [r0, #-1]
+ usat r11, #8, r11, asr #7
+
+ strh lr, [r1], r12 ; result is transposed and stored, which
+ ; will make second pass filtering easier.
+ ldrneb r10, [r0], #2
+ strh r11, [r1], r12
+
+ bne width_loop_1st_6
+
+ ldr r1, [sp] ; load and update dst address
+ subs r7, r7, #0x10000
+ add r0, r0, r2 ; move to next input line
+
+ add r1, r1, #2 ; move over to next column
+ str r1, [sp]
+
+ bne height_loop_1st_6
+
+ add sp, sp, #4
+ ldmia sp!, {r4 - r11, pc}
+
+ ENDP
+
+; --------------------------
+; 16x16 version
+; -----------------------------
+|vp8_filter_block2d_first_pass_16x16_armv6| PROC
+ stmdb sp!, {r4 - r11, lr}
+
+ ldr r11, [sp, #40] ; vp8_filter address
+ ldr r7, [sp, #36] ; output height
+
+ add r4, r2, #18 ; preload next low
+ pld [r0, r4]
+
+ sub r2, r2, r3 ; inside loop increments input array,
+ ; so the height loop only needs to add
+ ; r2 - width to the input pointer
+
+ mov r3, r3, lsl #1 ; multiply width by 2 because using shorts
+ add r12, r3, #16 ; square off the output
+ sub sp, sp, #4
+
+ ldr r4, [r11] ; load up packed filter coefficients
+ ldr r5, [r11, #4]
+ ldr r6, [r11, #8]
+
+ str r1, [sp] ; push destination to stack
+ mov r7, r7, lsl #16 ; height is top part of counter
+
+; six tap filter
+|height_loop_1st_16_6|
+ ldrb r8, [r0, #-2] ; load source data
+ ldrb r9, [r0, #-1]
+ ldrb r10, [r0], #2
+ orr r7, r7, r3, lsr #2 ; construct loop counter
+
+|width_loop_1st_16_6|
+ ldrb r11, [r0, #-1]
+
+ pkhbt lr, r8, r9, lsl #16 ; r9 | r8
+ pkhbt r8, r9, r10, lsl #16 ; r10 | r9
+
+ ldrb r9, [r0]
+
+ smuad lr, lr, r4 ; apply the filter
+ pkhbt r10, r10, r11, lsl #16 ; r11 | r10
+ smuad r8, r8, r4
+ pkhbt r11, r11, r9, lsl #16 ; r9 | r11
+
+ smlad lr, r10, r5, lr
+ ldrb r10, [r0, #1]
+ smlad r8, r11, r5, r8
+ ldrb r11, [r0, #2]
+
+ sub r7, r7, #1
+
+ pkhbt r9, r9, r10, lsl #16 ; r10 | r9
+ pkhbt r10, r10, r11, lsl #16 ; r11 | r10
+
+ smlad lr, r9, r6, lr
+ smlad r11, r10, r6, r8
+
+ ands r10, r7, #0xff ; test loop counter
+
+ add lr, lr, #0x40 ; round_shift_and_clamp
+ ldrneb r8, [r0, #-2] ; load data for next loop
+ usat lr, #8, lr, asr #7
+ add r11, r11, #0x40
+ ldrneb r9, [r0, #-1]
+ usat r11, #8, r11, asr #7
+
+ strh lr, [r1], r12 ; result is transposed and stored, which
+ ; will make second pass filtering easier.
+ ldrneb r10, [r0], #2
+ strh r11, [r1], r12
+
+ bne width_loop_1st_16_6
+
+ ldr r1, [sp] ; load and update dst address
+ subs r7, r7, #0x10000
+ add r0, r0, r2 ; move to next input line
+
+ add r11, r2, #34 ; adding back block width(=16)
+ pld [r0, r11] ; preload next low
+
+ add r1, r1, #2 ; move over to next column
+ str r1, [sp]
+
+ bne height_loop_1st_16_6
+
+ add sp, sp, #4
+ ldmia sp!, {r4 - r11, pc}
+
+ ENDP
+
+; --------------------------
+; 8x8 version
+; -----------------------------
+|vp8_filter_block2d_first_pass_8x8_armv6| PROC
+ stmdb sp!, {r4 - r11, lr}
+
+ ldr r11, [sp, #40] ; vp8_filter address
+ ldr r7, [sp, #36] ; output height
+
+ add r4, r2, #10 ; preload next low
+ pld [r0, r4]
+
+ sub r2, r2, r3 ; inside loop increments input array,
+ ; so the height loop only needs to add
+ ; r2 - width to the input pointer
+
+ mov r3, r3, lsl #1 ; multiply width by 2 because using shorts
+ add r12, r3, #16 ; square off the output
+ sub sp, sp, #4
+
+ ldr r4, [r11] ; load up packed filter coefficients
+ ldr r5, [r11, #4]
+ ldr r6, [r11, #8]
+
+ str r1, [sp] ; push destination to stack
+ mov r7, r7, lsl #16 ; height is top part of counter
+
+; six tap filter
+|height_loop_1st_8_6|
+ ldrb r8, [r0, #-2] ; load source data
+ ldrb r9, [r0, #-1]
+ ldrb r10, [r0], #2
+ orr r7, r7, r3, lsr #2 ; construct loop counter
+
+|width_loop_1st_8_6|
+ ldrb r11, [r0, #-1]
+
+ pkhbt lr, r8, r9, lsl #16 ; r9 | r8
+ pkhbt r8, r9, r10, lsl #16 ; r10 | r9
+
+ ldrb r9, [r0]
+
+ smuad lr, lr, r4 ; apply the filter
+ pkhbt r10, r10, r11, lsl #16 ; r11 | r10
+ smuad r8, r8, r4
+ pkhbt r11, r11, r9, lsl #16 ; r9 | r11
+
+ smlad lr, r10, r5, lr
+ ldrb r10, [r0, #1]
+ smlad r8, r11, r5, r8
+ ldrb r11, [r0, #2]
+
+ sub r7, r7, #1
+
+ pkhbt r9, r9, r10, lsl #16 ; r10 | r9
+ pkhbt r10, r10, r11, lsl #16 ; r11 | r10
+
+ smlad lr, r9, r6, lr
+ smlad r11, r10, r6, r8
+
+ ands r10, r7, #0xff ; test loop counter
+
+ add lr, lr, #0x40 ; round_shift_and_clamp
+ ldrneb r8, [r0, #-2] ; load data for next loop
+ usat lr, #8, lr, asr #7
+ add r11, r11, #0x40
+ ldrneb r9, [r0, #-1]
+ usat r11, #8, r11, asr #7
+
+ strh lr, [r1], r12 ; result is transposed and stored, which
+ ; will make second pass filtering easier.
+ ldrneb r10, [r0], #2
+ strh r11, [r1], r12
+
+ bne width_loop_1st_8_6
+
+ ldr r1, [sp] ; load and update dst address
+ subs r7, r7, #0x10000
+ add r0, r0, r2 ; move to next input line
+
+ add r11, r2, #18 ; adding back block width(=8)
+ pld [r0, r11] ; preload next low
+
+ add r1, r1, #2 ; move over to next column
+ str r1, [sp]
+
+ bne height_loop_1st_8_6
+
+ add sp, sp, #4
+ ldmia sp!, {r4 - r11, pc}
+
+ ENDP
+
+;---------------------------------
+; r0 short *src_ptr,
+; r1 unsigned char *output_ptr,
+; r2 unsigned int output_pitch,
+; r3 unsigned int cnt,
+; stack const short *vp8_filter
+;---------------------------------
+|vp8_filter_block2d_second_pass_armv6| PROC
+ stmdb sp!, {r4 - r11, lr}
+
+ ldr r11, [sp, #36] ; vp8_filter address
+ sub sp, sp, #4
+ mov r7, r3, lsl #16 ; height is top part of counter
+ str r1, [sp] ; push destination to stack
+
+ ldr r4, [r11] ; load up packed filter coefficients
+ ldr r5, [r11, #4]
+ ldr r6, [r11, #8]
+
+ pkhbt r12, r5, r4 ; pack the filter differently
+ pkhbt r11, r6, r5
+
+ sub r0, r0, #4 ; offset input buffer
+
+|height_loop_2nd|
+ ldr r8, [r0] ; load the data
+ ldr r9, [r0, #4]
+ orr r7, r7, r3, lsr #1 ; loop counter
+
+|width_loop_2nd|
+ smuad lr, r4, r8 ; apply filter
+ sub r7, r7, #1
+ smulbt r8, r4, r8
+
+ ldr r10, [r0, #8]
+
+ smlad lr, r5, r9, lr
+ smladx r8, r12, r9, r8
+
+ ldrh r9, [r0, #12]
+
+ smlad lr, r6, r10, lr
+ smladx r8, r11, r10, r8
+
+ add r0, r0, #4
+ smlatb r10, r6, r9, r8
+
+ add lr, lr, #0x40 ; round_shift_and_clamp
+ ands r8, r7, #0xff
+ usat lr, #8, lr, asr #7
+ add r10, r10, #0x40
+ strb lr, [r1], r2 ; the result is transposed back and stored
+ usat r10, #8, r10, asr #7
+
+ ldrne r8, [r0] ; load data for next loop
+ ldrne r9, [r0, #4]
+ strb r10, [r1], r2
+
+ bne width_loop_2nd
+
+ ldr r1, [sp] ; update dst for next loop
+ subs r7, r7, #0x10000
+ add r0, r0, #16 ; updata src for next loop
+ add r1, r1, #1
+ str r1, [sp]
+
+ bne height_loop_2nd
+
+ add sp, sp, #4
+ ldmia sp!, {r4 - r11, pc}
+
+ ENDP
+
+;---------------------------------
+; r0 short *src_ptr,
+; r1 unsigned char *output_ptr,
+; r2 unsigned int output_pitch,
+; r3 unsigned int cnt,
+; stack const short *vp8_filter
+;---------------------------------
+|vp8_filter4_block2d_second_pass_armv6| PROC
+ stmdb sp!, {r4 - r11, lr}
+
+ ldr r11, [sp, #36] ; vp8_filter address
+ mov r7, r3, lsl #16 ; height is top part of counter
+
+ ldr r4, [r11] ; load up packed filter coefficients
+ add lr, r1, r3 ; save final destination pointer
+ ldr r5, [r11, #4]
+ ldr r6, [r11, #8]
+
+ pkhbt r12, r5, r4 ; pack the filter differently
+ pkhbt r11, r6, r5
+ mov r4, #0x40 ; rounding factor (for smlad{x})
+
+|height_loop_2nd_4|
+ ldrd r8, r9, [r0, #-4] ; load the data
+ orr r7, r7, r3, lsr #1 ; loop counter
+
+|width_loop_2nd_4|
+ ldr r10, [r0, #4]!
+ smladx r6, r9, r12, r4 ; apply filter
+ pkhbt r8, r9, r8
+ smlad r5, r8, r12, r4
+ pkhbt r8, r10, r9
+ smladx r6, r10, r11, r6
+ sub r7, r7, #1
+ smlad r5, r8, r11, r5
+
+ mov r8, r9 ; shift the data for the next loop
+ mov r9, r10
+
+ usat r6, #8, r6, asr #7 ; shift and clamp
+ usat r5, #8, r5, asr #7
+
+ strb r5, [r1], r2 ; the result is transposed back and stored
+ tst r7, #0xff
+ strb r6, [r1], r2
+
+ bne width_loop_2nd_4
+
+ subs r7, r7, #0x10000
+ add r0, r0, #16 ; update src for next loop
+ sub r1, lr, r7, lsr #16 ; update dst for next loop
+
+ bne height_loop_2nd_4
+
+ ldmia sp!, {r4 - r11, pc}
+
+ ENDP
+
+;------------------------------------
+; r0 unsigned char *src_ptr
+; r1 unsigned char *output_ptr,
+; r2 unsigned int src_pixels_per_line
+; r3 unsigned int cnt,
+; stack unsigned int output_pitch,
+; stack const short *vp8_filter
+;------------------------------------
+|vp8_filter_block2d_first_pass_only_armv6| PROC
+ stmdb sp!, {r4 - r11, lr}
+
+ add r7, r2, r3 ; preload next low
+ add r7, r7, #2
+ pld [r0, r7]
+
+ ldr r4, [sp, #36] ; output pitch
+ ldr r11, [sp, #40] ; HFilter address
+ sub sp, sp, #8
+
+ mov r7, r3
+ sub r2, r2, r3 ; inside loop increments input array,
+ ; so the height loop only needs to add
+ ; r2 - width to the input pointer
+
+ sub r4, r4, r3
+ str r4, [sp] ; save modified output pitch
+ str r2, [sp, #4]
+
+ mov r2, #0x40
+
+ ldr r4, [r11] ; load up packed filter coefficients
+ ldr r5, [r11, #4]
+ ldr r6, [r11, #8]
+
+; six tap filter
+|height_loop_1st_only_6|
+ ldrb r8, [r0, #-2] ; load data
+ ldrb r9, [r0, #-1]
+ ldrb r10, [r0], #2
+
+ mov r12, r3, lsr #1 ; loop counter
+
+|width_loop_1st_only_6|
+ ldrb r11, [r0, #-1]
+
+ pkhbt lr, r8, r9, lsl #16 ; r9 | r8
+ pkhbt r8, r9, r10, lsl #16 ; r10 | r9
+
+ ldrb r9, [r0]
+
+;; smuad lr, lr, r4
+ smlad lr, lr, r4, r2
+ pkhbt r10, r10, r11, lsl #16 ; r11 | r10
+;; smuad r8, r8, r4
+ smlad r8, r8, r4, r2
+ pkhbt r11, r11, r9, lsl #16 ; r9 | r11
+
+ smlad lr, r10, r5, lr
+ ldrb r10, [r0, #1]
+ smlad r8, r11, r5, r8
+ ldrb r11, [r0, #2]
+
+ subs r12, r12, #1
+
+ pkhbt r9, r9, r10, lsl #16 ; r10 | r9
+ pkhbt r10, r10, r11, lsl #16 ; r11 | r10
+
+ smlad lr, r9, r6, lr
+ smlad r10, r10, r6, r8
+
+;; add lr, lr, #0x40 ; round_shift_and_clamp
+ ldrneb r8, [r0, #-2] ; load data for next loop
+ usat lr, #8, lr, asr #7
+;; add r10, r10, #0x40
+ strb lr, [r1], #1 ; store the result
+ usat r10, #8, r10, asr #7
+
+ ldrneb r9, [r0, #-1]
+ strb r10, [r1], #1
+ ldrneb r10, [r0], #2
+
+ bne width_loop_1st_only_6
+
+ ldr lr, [sp] ; load back output pitch
+ ldr r12, [sp, #4] ; load back output pitch
+ subs r7, r7, #1
+ add r0, r0, r12 ; updata src for next loop
+
+ add r11, r12, r3 ; preload next low
+ add r11, r11, #2
+ pld [r0, r11]
+
+ add r1, r1, lr ; update dst for next loop
+
+ bne height_loop_1st_only_6
+
+ add sp, sp, #8
+ ldmia sp!, {r4 - r11, pc}
+ ENDP ; |vp8_filter_block2d_first_pass_only_armv6|
+
+
+;------------------------------------
+; r0 unsigned char *src_ptr,
+; r1 unsigned char *output_ptr,
+; r2 unsigned int src_pixels_per_line
+; r3 unsigned int cnt,
+; stack unsigned int output_pitch,
+; stack const short *vp8_filter
+;------------------------------------
+|vp8_filter_block2d_second_pass_only_armv6| PROC
+ stmdb sp!, {r4 - r11, lr}
+
+ ldr r11, [sp, #40] ; VFilter address
+ ldr r12, [sp, #36] ; output pitch
+
+ mov r7, r3, lsl #16 ; height is top part of counter
+ sub r0, r0, r2, lsl #1 ; need 6 elements for filtering, 2 before, 3 after
+
+ sub sp, sp, #8
+
+ ldr r4, [r11] ; load up packed filter coefficients
+ ldr r5, [r11, #4]
+ ldr r6, [r11, #8]
+
+ str r0, [sp] ; save r0 to stack
+ str r1, [sp, #4] ; save dst to stack
+
+; six tap filter
+|width_loop_2nd_only_6|
+ ldrb r8, [r0], r2 ; load data
+ orr r7, r7, r3 ; loop counter
+ ldrb r9, [r0], r2
+ ldrb r10, [r0], r2
+
+|height_loop_2nd_only_6|
+ ; filter first column in this inner loop, than, move to next colum.
+ ldrb r11, [r0], r2
+
+ pkhbt lr, r8, r9, lsl #16 ; r9 | r8
+ pkhbt r8, r9, r10, lsl #16 ; r10 | r9
+
+ ldrb r9, [r0], r2
+
+ smuad lr, lr, r4
+ pkhbt r10, r10, r11, lsl #16 ; r11 | r10
+ smuad r8, r8, r4
+ pkhbt r11, r11, r9, lsl #16 ; r9 | r11
+
+ smlad lr, r10, r5, lr
+ ldrb r10, [r0], r2
+ smlad r8, r11, r5, r8
+ ldrb r11, [r0]
+
+ sub r7, r7, #2
+ sub r0, r0, r2, lsl #2
+
+ pkhbt r9, r9, r10, lsl #16 ; r10 | r9
+ pkhbt r10, r10, r11, lsl #16 ; r11 | r10
+
+ smlad lr, r9, r6, lr
+ smlad r10, r10, r6, r8
+
+ ands r9, r7, #0xff
+
+ add lr, lr, #0x40 ; round_shift_and_clamp
+ ldrneb r8, [r0], r2 ; load data for next loop
+ usat lr, #8, lr, asr #7
+ add r10, r10, #0x40
+ strb lr, [r1], r12 ; store the result for the column
+ usat r10, #8, r10, asr #7
+
+ ldrneb r9, [r0], r2
+ strb r10, [r1], r12
+ ldrneb r10, [r0], r2
+
+ bne height_loop_2nd_only_6
+
+ ldr r0, [sp]
+ ldr r1, [sp, #4]
+ subs r7, r7, #0x10000
+ add r0, r0, #1 ; move to filter next column
+ str r0, [sp]
+ add r1, r1, #1
+ str r1, [sp, #4]
+
+ bne width_loop_2nd_only_6
+
+ add sp, sp, #8
+
+ ldmia sp!, {r4 - r11, pc}
+ ENDP ; |vp8_filter_block2d_second_pass_only_armv6|
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/idct_blk_v6.c b/media/libvpx/vp8/common/arm/armv6/idct_blk_v6.c
new file mode 100644
index 000000000..c94f84a62
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/idct_blk_v6.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "vpx_config.h"
+#include "vp8_rtcd.h"
+
+
+void vp8_dequant_idct_add_y_block_v6(short *q, short *dq,
+ unsigned char *dst,
+ int stride, char *eobs)
+{
+ int i;
+
+ for (i = 0; i < 4; i++)
+ {
+ if (eobs[0] > 1)
+ vp8_dequant_idct_add_v6 (q, dq, dst, stride);
+ else if (eobs[0] == 1)
+ {
+ vp8_dc_only_idct_add_v6 (q[0]*dq[0], dst, stride, dst, stride);
+ ((int *)q)[0] = 0;
+ }
+
+ if (eobs[1] > 1)
+ vp8_dequant_idct_add_v6 (q+16, dq, dst+4, stride);
+ else if (eobs[1] == 1)
+ {
+ vp8_dc_only_idct_add_v6 (q[16]*dq[0], dst+4, stride, dst+4, stride);
+ ((int *)(q+16))[0] = 0;
+ }
+
+ if (eobs[2] > 1)
+ vp8_dequant_idct_add_v6 (q+32, dq, dst+8, stride);
+ else if (eobs[2] == 1)
+ {
+ vp8_dc_only_idct_add_v6 (q[32]*dq[0], dst+8, stride, dst+8, stride);
+ ((int *)(q+32))[0] = 0;
+ }
+
+ if (eobs[3] > 1)
+ vp8_dequant_idct_add_v6 (q+48, dq, dst+12, stride);
+ else if (eobs[3] == 1)
+ {
+ vp8_dc_only_idct_add_v6 (q[48]*dq[0], dst+12, stride,dst+12,stride);
+ ((int *)(q+48))[0] = 0;
+ }
+
+ q += 64;
+ dst += 4*stride;
+ eobs += 4;
+ }
+}
+
+void vp8_dequant_idct_add_uv_block_v6(short *q, short *dq,
+ unsigned char *dstu,
+ unsigned char *dstv,
+ int stride, char *eobs)
+{
+ int i;
+
+ for (i = 0; i < 2; i++)
+ {
+ if (eobs[0] > 1)
+ vp8_dequant_idct_add_v6 (q, dq, dstu, stride);
+ else if (eobs[0] == 1)
+ {
+ vp8_dc_only_idct_add_v6 (q[0]*dq[0], dstu, stride, dstu, stride);
+ ((int *)q)[0] = 0;
+ }
+
+ if (eobs[1] > 1)
+ vp8_dequant_idct_add_v6 (q+16, dq, dstu+4, stride);
+ else if (eobs[1] == 1)
+ {
+ vp8_dc_only_idct_add_v6 (q[16]*dq[0], dstu+4, stride,
+ dstu+4, stride);
+ ((int *)(q+16))[0] = 0;
+ }
+
+ q += 32;
+ dstu += 4*stride;
+ eobs += 2;
+ }
+
+ for (i = 0; i < 2; i++)
+ {
+ if (eobs[0] > 1)
+ vp8_dequant_idct_add_v6 (q, dq, dstv, stride);
+ else if (eobs[0] == 1)
+ {
+ vp8_dc_only_idct_add_v6 (q[0]*dq[0], dstv, stride, dstv, stride);
+ ((int *)q)[0] = 0;
+ }
+
+ if (eobs[1] > 1)
+ vp8_dequant_idct_add_v6 (q+16, dq, dstv+4, stride);
+ else if (eobs[1] == 1)
+ {
+ vp8_dc_only_idct_add_v6 (q[16]*dq[0], dstv+4, stride,
+ dstv+4, stride);
+ ((int *)(q+16))[0] = 0;
+ }
+
+ q += 32;
+ dstv += 4*stride;
+ eobs += 2;
+ }
+}
diff --git a/media/libvpx/vp8/common/arm/armv6/idct_v6.asm b/media/libvpx/vp8/common/arm/armv6/idct_v6.asm
new file mode 100644
index 000000000..b4d44cbeb
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/idct_v6.asm
@@ -0,0 +1,202 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_short_idct4x4llm_v6_dual|
+
+ AREA |.text|, CODE, READONLY
+
+
+; void vp8_short_idct4x4llm_c(short *input, unsigned char *pred, int pitch,
+; unsigned char *dst, int stride)
+; r0 short* input
+; r1 unsigned char* pred
+; r2 int pitch
+; r3 unsigned char* dst
+; sp int stride
+
+|vp8_short_idct4x4llm_v6_dual| PROC
+ stmdb sp!, {r4-r11, lr}
+
+ sub sp, sp, #4
+
+ mov r4, #0x00008A00 ; sin
+ orr r4, r4, #0x0000008C ; sinpi8sqrt2
+
+ mov r5, #0x00004E00 ; cos
+ orr r5, r5, #0x0000007B ; cospi8sqrt2minus1
+ orr r5, r5, #1<<31 ; loop counter on top bit
+
+loop1_dual
+ ldr r6, [r0, #(4*2)] ; i5 | i4
+ ldr r12, [r0, #(12*2)] ; i13|i12
+ ldr r14, [r0, #(8*2)] ; i9 | i8
+
+ smulbt r9, r5, r6 ; (ip[5] * cospi8sqrt2minus1) >> 16
+ smulbb r7, r5, r6 ; (ip[4] * cospi8sqrt2minus1) >> 16
+ smulwt r10, r4, r6 ; (ip[5] * sinpi8sqrt2) >> 16
+ smulwb r8, r4, r6 ; (ip[4] * sinpi8sqrt2) >> 16
+
+ smulbt r11, r5, r12 ; (ip[13] * cospi8sqrt2minus1) >> 16
+ pkhtb r7, r9, r7, asr #16 ; 5c | 4c
+ pkhbt r8, r8, r10, lsl #16 ; 5s | 4s
+ uadd16 r6, r6, r7 ; 5c+5 | 4c+4
+
+ smulwt r7, r4, r12 ; (ip[13] * sinpi8sqrt2) >> 16
+ smulbb r9, r5, r12 ; (ip[12] * cospi8sqrt2minus1) >> 16
+ smulwb r10, r4, r12 ; (ip[12] * sinpi8sqrt2) >> 16
+
+ subs r5, r5, #1<<31 ; i--
+
+ pkhtb r9, r11, r9, asr #16 ; 13c | 12c
+ ldr r11, [r0] ; i1 | i0
+ pkhbt r10, r10, r7, lsl #16 ; 13s | 12s
+ uadd16 r7, r12, r9 ; 13c+13 | 12c+12
+
+ usub16 r7, r8, r7 ; c
+ uadd16 r6, r6, r10 ; d
+ uadd16 r10, r11, r14 ; a
+ usub16 r8, r11, r14 ; b
+
+ uadd16 r9, r10, r6 ; a+d
+ usub16 r10, r10, r6 ; a-d
+ uadd16 r6, r8, r7 ; b+c
+ usub16 r7, r8, r7 ; b-c
+
+ ; use input buffer to store intermediate results
+ str r6, [r0, #(4*2)] ; o5 | o4
+ str r7, [r0, #(8*2)] ; o9 | o8
+ str r10,[r0, #(12*2)] ; o13|o12
+ str r9, [r0], #4 ; o1 | o0
+
+ bcs loop1_dual
+
+ sub r0, r0, #8 ; reset input/output
+ str r0, [sp]
+
+loop2_dual
+
+ ldr r6, [r0, #(4*2)] ; i5 | i4
+ ldr r12,[r0, #(2*2)] ; i3 | i2
+ ldr r14,[r0, #(6*2)] ; i7 | i6
+ ldr r0, [r0, #(0*2)] ; i1 | i0
+
+ smulbt r9, r5, r6 ; (ip[5] * cospi8sqrt2minus1) >> 16
+ smulbt r7, r5, r0 ; (ip[1] * cospi8sqrt2minus1) >> 16
+ smulwt r10, r4, r6 ; (ip[5] * sinpi8sqrt2) >> 16
+ smulwt r8, r4, r0 ; (ip[1] * sinpi8sqrt2) >> 16
+
+ pkhbt r11, r6, r0, lsl #16 ; i0 | i4
+ pkhtb r7, r7, r9, asr #16 ; 1c | 5c
+ pkhtb r0, r0, r6, asr #16 ; i1 | i5
+ pkhbt r8, r10, r8, lsl #16 ; 1s | 5s = temp1
+
+ uadd16 r0, r7, r0 ; 1c+1 | 5c+5 = temp2
+ pkhbt r9, r14, r12, lsl #16 ; i2 | i6
+ uadd16 r10, r11, r9 ; a
+ usub16 r9, r11, r9 ; b
+ pkhtb r6, r12, r14, asr #16 ; i3 | i7
+
+ subs r5, r5, #1<<31 ; i--
+
+ smulbt r7, r5, r6 ; (ip[3] * cospi8sqrt2minus1) >> 16
+ smulwt r11, r4, r6 ; (ip[3] * sinpi8sqrt2) >> 16
+ smulbb r12, r5, r6 ; (ip[7] * cospi8sqrt2minus1) >> 16
+ smulwb r14, r4, r6 ; (ip[7] * sinpi8sqrt2) >> 16
+
+ pkhtb r7, r7, r12, asr #16 ; 3c | 7c
+ pkhbt r11, r14, r11, lsl #16 ; 3s | 7s = temp1
+
+ uadd16 r6, r7, r6 ; 3c+3 | 7c+7 = temp2
+ usub16 r12, r8, r6 ; c (o1 | o5)
+ uadd16 r6, r11, r0 ; d (o3 | o7)
+ uadd16 r7, r10, r6 ; a+d
+
+ mov r8, #4 ; set up 4's
+ orr r8, r8, #0x40000 ; 4|4
+
+ usub16 r6, r10, r6 ; a-d
+ uadd16 r6, r6, r8 ; a-d+4, 3|7
+ uadd16 r7, r7, r8 ; a+d+4, 0|4
+ uadd16 r10, r9, r12 ; b+c
+ usub16 r0, r9, r12 ; b-c
+ uadd16 r10, r10, r8 ; b+c+4, 1|5
+ uadd16 r8, r0, r8 ; b-c+4, 2|6
+
+ ldr lr, [sp, #40] ; dst stride
+
+ ldrb r0, [r1] ; pred p0
+ ldrb r11, [r1, #1] ; pred p1
+ ldrb r12, [r1, #2] ; pred p2
+
+ add r0, r0, r7, asr #19 ; p0 + o0
+ add r11, r11, r10, asr #19 ; p1 + o1
+ add r12, r12, r8, asr #19 ; p2 + o2
+
+ usat r0, #8, r0 ; d0 = clip8(p0 + o0)
+ usat r11, #8, r11 ; d1 = clip8(p1 + o1)
+ usat r12, #8, r12 ; d2 = clip8(p2 + o2)
+
+ add r0, r0, r11, lsl #8 ; |--|--|d1|d0|
+
+ ldrb r11, [r1, #3] ; pred p3
+
+ add r0, r0, r12, lsl #16 ; |--|d2|d1|d0|
+
+ add r11, r11, r6, asr #19 ; p3 + o3
+
+ sxth r7, r7 ;
+ sxth r10, r10 ;
+
+ usat r11, #8, r11 ; d3 = clip8(p3 + o3)
+
+ sxth r8, r8 ;
+ sxth r6, r6 ;
+
+ add r0, r0, r11, lsl #24 ; |d3|d2|d1|d0|
+
+ ldrb r12, [r1, r2]! ; pred p4
+ str r0, [r3], lr
+ ldrb r11, [r1, #1] ; pred p5
+
+ add r12, r12, r7, asr #3 ; p4 + o4
+ add r11, r11, r10, asr #3 ; p5 + o5
+
+ usat r12, #8, r12 ; d4 = clip8(p4 + o4)
+ usat r11, #8, r11 ; d5 = clip8(p5 + o5)
+
+ ldrb r7, [r1, #2] ; pred p6
+ ldrb r10, [r1, #3] ; pred p6
+
+ add r12, r12, r11, lsl #8 ; |--|--|d5|d4|
+
+ add r7, r7, r8, asr #3 ; p6 + o6
+ add r10, r10, r6, asr #3 ; p7 + o7
+
+ ldr r0, [sp] ; load input pointer
+
+ usat r7, #8, r7 ; d6 = clip8(p6 + o6)
+ usat r10, #8, r10 ; d7 = clip8(p7 + o7)
+
+ add r12, r12, r7, lsl #16 ; |--|d6|d5|d4|
+ add r12, r12, r10, lsl #24 ; |d7|d6|d5|d4|
+
+ str r12, [r3], lr
+ add r0, r0, #16
+ add r1, r1, r2 ; pred + pitch
+
+ bcs loop2_dual
+
+ add sp, sp, #4 ; idct_output buffer
+ ldmia sp!, {r4 - r11, pc}
+
+ ENDP
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/intra4x4_predict_v6.asm b/media/libvpx/vp8/common/arm/armv6/intra4x4_predict_v6.asm
new file mode 100644
index 000000000..c5ec824b3
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/intra4x4_predict_v6.asm
@@ -0,0 +1,611 @@
+;
+; Copyright (c) 2011 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_intra4x4_predict_armv6|
+
+ ARM
+ REQUIRE8
+ PRESERVE8
+
+ AREA ||.text||, CODE, READONLY, ALIGN=2
+
+
+;void vp8_intra4x4_predict_armv6(unsigned char *Above, unsigned char *yleft,
+; B_PREDICTION_MODE left_stride, int b_mode,
+; unsigned char *dst, int dst_stride,
+; unsigned char top_left)
+
+; r0: *Above
+; r1: *yleft
+; r2: left_stride
+; r3: b_mode
+; sp + #40: dst
+; sp + #44: dst_stride
+; sp + #48: top_left
+|vp8_intra4x4_predict_armv6| PROC
+ push {r4-r12, lr}
+
+ cmp r3, #10
+ addlt pc, pc, r3, lsl #2 ; position independent switch
+ pop {r4-r12, pc} ; default
+ b b_dc_pred
+ b b_tm_pred
+ b b_ve_pred
+ b b_he_pred
+ b b_ld_pred
+ b b_rd_pred
+ b b_vr_pred
+ b b_vl_pred
+ b b_hd_pred
+ b b_hu_pred
+
+b_dc_pred
+ ; load values
+ ldr r8, [r0] ; Above
+ ldrb r4, [r1], r2 ; Left[0]
+ mov r9, #0
+ ldrb r5, [r1], r2 ; Left[1]
+ ldrb r6, [r1], r2 ; Left[2]
+ usad8 r12, r8, r9
+ ldrb r7, [r1] ; Left[3]
+
+ ; calculate dc
+ add r4, r4, r5
+ add r4, r4, r6
+ add r4, r4, r7
+ add r4, r4, r12
+ add r4, r4, #4
+ ldr r0, [sp, #44] ; dst_stride
+ mov r12, r4, asr #3 ; (expected_dc + 4) >> 3
+
+ add r12, r12, r12, lsl #8
+ ldr r3, [sp, #40] ; dst
+ add r12, r12, r12, lsl #16
+
+ ; store values
+ str r12, [r3], r0
+ str r12, [r3], r0
+ str r12, [r3], r0
+ str r12, [r3]
+
+ pop {r4-r12, pc}
+
+b_tm_pred
+ ldr r8, [r0] ; Above
+ ldrb r9, [sp, #48] ; top_left
+ ldrb r4, [r1], r2 ; Left[0]
+ ldrb r5, [r1], r2 ; Left[1]
+ ldrb r6, [r1], r2 ; Left[2]
+ ldrb r7, [r1] ; Left[3]
+ ldr r0, [sp, #44] ; dst_stride
+ ldr r3, [sp, #40] ; dst
+
+ add r9, r9, r9, lsl #16 ; [tl|tl]
+ uxtb16 r10, r8 ; a[2|0]
+ uxtb16 r11, r8, ror #8 ; a[3|1]
+ ssub16 r10, r10, r9 ; a[2|0] - [tl|tl]
+ ssub16 r11, r11, r9 ; a[3|1] - [tl|tl]
+
+ add r4, r4, r4, lsl #16 ; l[0|0]
+ add r5, r5, r5, lsl #16 ; l[1|1]
+ add r6, r6, r6, lsl #16 ; l[2|2]
+ add r7, r7, r7, lsl #16 ; l[3|3]
+
+ sadd16 r1, r4, r10 ; l[0|0] + a[2|0] - [tl|tl]
+ sadd16 r2, r4, r11 ; l[0|0] + a[3|1] - [tl|tl]
+ usat16 r1, #8, r1
+ usat16 r2, #8, r2
+
+ sadd16 r4, r5, r10 ; l[1|1] + a[2|0] - [tl|tl]
+ sadd16 r5, r5, r11 ; l[1|1] + a[3|1] - [tl|tl]
+
+ add r12, r1, r2, lsl #8 ; [3|2|1|0]
+ str r12, [r3], r0
+
+ usat16 r4, #8, r4
+ usat16 r5, #8, r5
+
+ sadd16 r1, r6, r10 ; l[2|2] + a[2|0] - [tl|tl]
+ sadd16 r2, r6, r11 ; l[2|2] + a[3|1] - [tl|tl]
+
+ add r12, r4, r5, lsl #8 ; [3|2|1|0]
+ str r12, [r3], r0
+
+ usat16 r1, #8, r1
+ usat16 r2, #8, r2
+
+ sadd16 r4, r7, r10 ; l[3|3] + a[2|0] - [tl|tl]
+ sadd16 r5, r7, r11 ; l[3|3] + a[3|1] - [tl|tl]
+
+ add r12, r1, r2, lsl #8 ; [3|2|1|0]
+
+ usat16 r4, #8, r4
+ usat16 r5, #8, r5
+
+ str r12, [r3], r0
+
+ add r12, r4, r5, lsl #8 ; [3|2|1|0]
+ str r12, [r3]
+
+ pop {r4-r12, pc}
+
+b_ve_pred
+ ldr r8, [r0] ; a[3|2|1|0]
+ ldr r11, c00FF00FF
+ ldrb r9, [sp, #48] ; top_left
+ ldrb r10, [r0, #4] ; a[4]
+
+ ldr r0, c00020002
+
+ uxtb16 r4, r8 ; a[2|0]
+ uxtb16 r5, r8, ror #8 ; a[3|1]
+ ldr r2, [sp, #44] ; dst_stride
+ pkhbt r9, r9, r5, lsl #16 ; a[1|-1]
+
+ add r9, r9, r4, lsl #1 ;[a[1]+2*a[2] | tl+2*a[0] ]
+ uxtab16 r9, r9, r5 ;[a[1]+2*a[2]+a[3] | tl+2*a[0]+a[1] ]
+ ldr r3, [sp, #40] ; dst
+ uxtab16 r9, r9, r0 ;[a[1]+2*a[2]+a[3]+2| tl+2*a[0]+a[1]+2]
+
+ add r0, r0, r10, lsl #16 ;[a[4]+2 | 2]
+ add r0, r0, r4, asr #16 ;[a[4]+2 | a[2]+2]
+ add r0, r0, r5, lsl #1 ;[a[4]+2*a[3]+2 | a[2]+2*a[1]+2]
+ uadd16 r4, r4, r0 ;[a[4]+2*a[3]+a[2]+2|a[2]+2*a[1]+a[0]+2]
+
+ and r9, r11, r9, asr #2
+ and r4, r11, r4, asr #2
+ add r9, r9, r4, lsl #8
+
+ ; store values
+ str r9, [r3], r2
+ str r9, [r3], r2
+ str r9, [r3], r2
+ str r9, [r3]
+
+ pop {r4-r12, pc}
+
+
+b_he_pred
+ ldrb r4, [r1], r2 ; Left[0]
+ ldrb r8, [sp, #48] ; top_left
+ ldrb r5, [r1], r2 ; Left[1]
+ ldrb r6, [r1], r2 ; Left[2]
+ ldrb r7, [r1] ; Left[3]
+
+ add r8, r8, r4 ; tl + l[0]
+ add r9, r4, r5 ; l[0] + l[1]
+ add r10, r5, r6 ; l[1] + l[2]
+ add r11, r6, r7 ; l[2] + l[3]
+
+ mov r0, #2<<14
+
+ add r8, r8, r9 ; tl + 2*l[0] + l[1]
+ add r4, r9, r10 ; l[0] + 2*l[1] + l[2]
+ add r5, r10, r11 ; l[1] + 2*l[2] + l[3]
+ add r6, r11, r7, lsl #1 ; l[2] + 2*l[3] + l[3]
+
+
+ add r8, r0, r8, lsl #14 ; (tl + 2*l[0] + l[1])>>2 in top half
+ add r9, r0, r4, lsl #14 ; (l[0] + 2*l[1] + l[2])>>2 in top half
+ add r10,r0, r5, lsl #14 ; (l[1] + 2*l[2] + l[3])>>2 in top half
+ add r11,r0, r6, lsl #14 ; (l[2] + 2*l[3] + l[3])>>2 in top half
+
+ pkhtb r8, r8, r8, asr #16 ; l[-|0|-|0]
+ pkhtb r9, r9, r9, asr #16 ; l[-|1|-|1]
+ pkhtb r10, r10, r10, asr #16 ; l[-|2|-|2]
+ pkhtb r11, r11, r11, asr #16 ; l[-|3|-|3]
+
+ ldr r0, [sp, #44] ; dst_stride
+ ldr r3, [sp, #40] ; dst
+
+ add r8, r8, r8, lsl #8 ; l[0|0|0|0]
+ add r9, r9, r9, lsl #8 ; l[1|1|1|1]
+ add r10, r10, r10, lsl #8 ; l[2|2|2|2]
+ add r11, r11, r11, lsl #8 ; l[3|3|3|3]
+
+ ; store values
+ str r8, [r3], r0
+ str r9, [r3], r0
+ str r10, [r3], r0
+ str r11, [r3]
+
+ pop {r4-r12, pc}
+
+b_ld_pred
+ ldr r4, [r0] ; Above[0-3]
+ ldr r12, c00020002
+ ldr r5, [r0, #4] ; Above[4-7]
+ ldr lr, c00FF00FF
+
+ uxtb16 r6, r4 ; a[2|0]
+ uxtb16 r7, r4, ror #8 ; a[3|1]
+ uxtb16 r8, r5 ; a[6|4]
+ uxtb16 r9, r5, ror #8 ; a[7|5]
+ pkhtb r10, r6, r8 ; a[2|4]
+ pkhtb r11, r7, r9 ; a[3|5]
+
+ add r4, r6, r7, lsl #1 ; [a2+2*a3 | a0+2*a1]
+ add r4, r4, r10, ror #16 ; [a2+2*a3+a4 | a0+2*a1+a2]
+ uxtab16 r4, r4, r12 ; [a2+2*a3+a4+2 | a0+2*a1+a2+2]
+
+ add r5, r7, r10, ror #15 ; [a3+2*a4 | a1+2*a2]
+ add r5, r5, r11, ror #16 ; [a3+2*a4+a5 | a1+2*a2+a3]
+ uxtab16 r5, r5, r12 ; [a3+2*a4+a5+2 | a1+2*a2+a3+2]
+
+ pkhtb r7, r9, r8, asr #16
+ add r6, r8, r9, lsl #1 ; [a6+2*a7 | a4+2*a5]
+ uadd16 r6, r6, r7 ; [a6+2*a7+a7 | a4+2*a5+a6]
+ uxtab16 r6, r6, r12 ; [a6+2*a7+a7+2 | a4+2*a5+a6+2]
+
+ uxth r7, r9 ; [ a5]
+ add r7, r7, r8, asr #15 ; [ a5+2*a6]
+ add r7, r7, r9, asr #16 ; [ a5+2*a6+a7]
+ uxtah r7, r7, r12 ; [ a5+2*a6+a7+2]
+
+ ldr r0, [sp, #44] ; dst_stride
+ ldr r3, [sp, #40] ; dst
+
+ ; scale down
+ and r4, lr, r4, asr #2
+ and r5, lr, r5, asr #2
+ and r6, lr, r6, asr #2
+ mov r7, r7, asr #2
+
+ add r8, r4, r5, lsl #8 ; [3|2|1|0]
+ str r8, [r3], r0
+
+ mov r9, r8, lsr #8
+ add r9, r9, r6, lsl #24 ; [4|3|2|1]
+ str r9, [r3], r0
+
+ mov r10, r9, lsr #8
+ add r10, r10, r7, lsl #24 ; [5|4|3|2]
+ str r10, [r3], r0
+
+ mov r6, r6, lsr #16
+ mov r11, r10, lsr #8
+ add r11, r11, r6, lsl #24 ; [6|5|4|3]
+ str r11, [r3]
+
+ pop {r4-r12, pc}
+
+b_rd_pred
+ ldrb r7, [r1], r2 ; l[0] = pp[3]
+ ldr lr, [r0] ; Above = pp[8|7|6|5]
+ ldrb r8, [sp, #48] ; tl = pp[4]
+ ldrb r6, [r1], r2 ; l[1] = pp[2]
+ ldrb r5, [r1], r2 ; l[2] = pp[1]
+ ldrb r4, [r1], r2 ; l[3] = pp[0]
+
+
+ uxtb16 r9, lr ; p[7|5]
+ uxtb16 r10, lr, ror #8 ; p[8|6]
+ add r4, r4, r6, lsl #16 ; p[2|0]
+ add r5, r5, r7, lsl #16 ; p[3|1]
+ add r6, r6, r8, lsl #16 ; p[4|2]
+ pkhbt r7, r7, r9, lsl #16 ; p[5|3]
+ pkhbt r8, r8, r10, lsl #16 ; p[6|4]
+
+ ldr r12, c00020002
+ ldr lr, c00FF00FF
+
+ add r4, r4, r5, lsl #1 ; [p2+2*p3 | p0+2*p1]
+ add r4, r4, r6 ; [p2+2*p3+p4 | p0+2*p1+p2]
+ uxtab16 r4, r4, r12 ; [p2+2*p3+p4+2 | p0+2*p1+p2+2]
+
+ add r5, r5, r6, lsl #1 ; [p3+2*p4 | p1+2*p2]
+ add r5, r5, r7 ; [p3+2*p4+p5 | p1+2*p2+p3]
+ uxtab16 r5, r5, r12 ; [p3+2*p4+p5+2 | p1+2*p2+p3+2]
+
+ add r6, r7, r8, lsl #1 ; [p5+2*p6 | p3+2*p4]
+ add r6, r6, r9 ; [p5+2*p6+p7 | p3+2*p4+p5]
+ uxtab16 r6, r6, r12 ; [p5+2*p6+p7+2 | p3+2*p4+p5+2]
+
+ add r7, r8, r9, lsl #1 ; [p6+2*p7 | p4+2*p5]
+ add r7, r7, r10 ; [p6+2*p7+p8 | p4+2*p5+p6]
+ uxtab16 r7, r7, r12 ; [p6+2*p7+p8+2 | p4+2*p5+p6+2]
+
+ ldr r0, [sp, #44] ; dst_stride
+ ldr r3, [sp, #40] ; dst
+
+ ; scale down
+ and r7, lr, r7, asr #2
+ and r6, lr, r6, asr #2
+ and r5, lr, r5, asr #2
+ and r4, lr, r4, asr #2
+
+ add r8, r6, r7, lsl #8 ; [6|5|4|3]
+ str r8, [r3], r0
+
+ mov r9, r8, lsl #8 ; [5|4|3|-]
+ uxtab r9, r9, r4, ror #16 ; [5|4|3|2]
+ str r9, [r3], r0
+
+ mov r10, r9, lsl #8 ; [4|3|2|-]
+ uxtab r10, r10, r5 ; [4|3|2|1]
+ str r10, [r3], r0
+
+ mov r11, r10, lsl #8 ; [3|2|1|-]
+ uxtab r11, r11, r4 ; [3|2|1|0]
+ str r11, [r3]
+
+ pop {r4-r12, pc}
+
+b_vr_pred
+ ldrb r7, [r1], r2 ; l[0] = pp[3]
+ ldr lr, [r0] ; Above = pp[8|7|6|5]
+ ldrb r8, [sp, #48] ; tl = pp[4]
+ ldrb r6, [r1], r2 ; l[1] = pp[2]
+ ldrb r5, [r1], r2 ; l[2] = pp[1]
+ ldrb r4, [r1] ; l[3] = pp[0]
+
+ add r5, r5, r7, lsl #16 ; p[3|1]
+ add r6, r6, r8, lsl #16 ; p[4|2]
+ uxtb16 r9, lr ; p[7|5]
+ uxtb16 r10, lr, ror #8 ; p[8|6]
+ pkhbt r7, r7, r9, lsl #16 ; p[5|3]
+ pkhbt r8, r8, r10, lsl #16 ; p[6|4]
+
+ ldr r4, c00010001
+ ldr r12, c00020002
+ ldr lr, c00FF00FF
+
+ add r5, r5, r6, lsl #1 ; [p3+2*p4 | p1+2*p2]
+ add r5, r5, r7 ; [p3+2*p4+p5 | p1+2*p2+p3]
+ uxtab16 r5, r5, r12 ; [p3+2*p4+p5+2 | p1+2*p2+p3+2]
+
+ add r6, r6, r7, lsl #1 ; [p4+2*p5 | p2+2*p3]
+ add r6, r6, r8 ; [p4+2*p5+p6 | p2+2*p3+p4]
+ uxtab16 r6, r6, r12 ; [p4+2*p5+p6+2 | p2+2*p3+p4+2]
+
+ uadd16 r11, r8, r9 ; [p6+p7 | p4+p5]
+ uhadd16 r11, r11, r4 ; [(p6+p7+1)>>1 | (p4+p5+1)>>1]
+ ; [F|E]
+
+ add r7, r7, r8, lsl #1 ; [p5+2*p6 | p3+2*p4]
+ add r7, r7, r9 ; [p5+2*p6+p7 | p3+2*p4+p5]
+ uxtab16 r7, r7, r12 ; [p5+2*p6+p7+2 | p3+2*p4+p5+2]
+
+ uadd16 r2, r9, r10 ; [p7+p8 | p5+p6]
+ uhadd16 r2, r2, r4 ; [(p7+p8+1)>>1 | (p5+p6+1)>>1]
+ ; [J|I]
+
+ add r8, r8, r9, lsl #1 ; [p6+2*p7 | p4+2*p5]
+ add r8, r8, r10 ; [p6+2*p7+p8 | p4+2*p5+p6]
+ uxtab16 r8, r8, r12 ; [p6+2*p7+p8+2 | p4+2*p5+p6+2]
+
+ ldr r0, [sp, #44] ; dst_stride
+ ldr r3, [sp, #40] ; dst
+
+ ; scale down
+ and r5, lr, r5, asr #2 ; [B|A]
+ and r6, lr, r6, asr #2 ; [D|C]
+ and r7, lr, r7, asr #2 ; [H|G]
+ and r8, lr, r8, asr #2 ; [L|K]
+
+ add r12, r11, r2, lsl #8 ; [J|F|I|E]
+ str r12, [r3], r0
+
+ add r12, r7, r8, lsl #8 ; [L|H|K|G]
+ str r12, [r3], r0
+
+ pkhbt r2, r6, r2, lsl #16 ; [-|I|-|C]
+ add r2, r2, r11, lsl #8 ; [F|I|E|C]
+
+ pkhtb r12, r6, r5 ; [-|D|-|A]
+ pkhtb r10, r7, r5, asr #16 ; [-|H|-|B]
+ str r2, [r3], r0
+ add r12, r12, r10, lsl #8 ; [H|D|B|A]
+ str r12, [r3]
+
+ pop {r4-r12, pc}
+
+b_vl_pred
+ ldr r4, [r0] ; [3|2|1|0] = Above[0-3]
+ ldr r12, c00020002
+ ldr r5, [r0, #4] ; [7|6|5|4] = Above[4-7]
+ ldr lr, c00FF00FF
+ ldr r2, c00010001
+
+ mov r0, r4, lsr #16 ; [-|-|3|2]
+ add r0, r0, r5, lsl #16 ; [5|4|3|2]
+ uxtb16 r6, r4 ; [2|0]
+ uxtb16 r7, r4, ror #8 ; [3|1]
+ uxtb16 r8, r0 ; [4|2]
+ uxtb16 r9, r0, ror #8 ; [5|3]
+ uxtb16 r10, r5 ; [6|4]
+ uxtb16 r11, r5, ror #8 ; [7|5]
+
+ uadd16 r4, r6, r7 ; [p2+p3 | p0+p1]
+ uhadd16 r4, r4, r2 ; [(p2+p3+1)>>1 | (p0+p1+1)>>1]
+ ; [B|A]
+
+ add r5, r6, r7, lsl #1 ; [p2+2*p3 | p0+2*p1]
+ add r5, r5, r8 ; [p2+2*p3+p4 | p0+2*p1+p2]
+ uxtab16 r5, r5, r12 ; [p2+2*p3+p4+2 | p0+2*p1+p2+2]
+
+ uadd16 r6, r7, r8 ; [p3+p4 | p1+p2]
+ uhadd16 r6, r6, r2 ; [(p3+p4+1)>>1 | (p1+p2+1)>>1]
+ ; [F|E]
+
+ add r7, r7, r8, lsl #1 ; [p3+2*p4 | p1+2*p2]
+ add r7, r7, r9 ; [p3+2*p4+p5 | p1+2*p2+p3]
+ uxtab16 r7, r7, r12 ; [p3+2*p4+p5+2 | p1+2*p2+p3+2]
+
+ add r8, r8, r9, lsl #1 ; [p4+2*p5 | p2+2*p3]
+ add r8, r8, r10 ; [p4+2*p5+p6 | p2+2*p3+p4]
+ uxtab16 r8, r8, r12 ; [p4+2*p5+p6+2 | p2+2*p3+p4+2]
+
+ add r9, r9, r10, lsl #1 ; [p5+2*p6 | p3+2*p4]
+ add r9, r9, r11 ; [p5+2*p6+p7 | p3+2*p4+p5]
+ uxtab16 r9, r9, r12 ; [p5+2*p6+p7+2 | p3+2*p4+p5+2]
+
+ ldr r0, [sp, #44] ; dst_stride
+ ldr r3, [sp, #40] ; dst
+
+ ; scale down
+ and r5, lr, r5, asr #2 ; [D|C]
+ and r7, lr, r7, asr #2 ; [H|G]
+ and r8, lr, r8, asr #2 ; [I|D]
+ and r9, lr, r9, asr #2 ; [J|H]
+
+ add r10, r4, r6, lsl #8 ; [F|B|E|A]
+ str r10, [r3], r0
+
+ add r5, r5, r7, lsl #8 ; [H|C|G|D]
+ str r5, [r3], r0
+
+ pkhtb r12, r8, r4, asr #16 ; [-|I|-|B]
+ pkhtb r10, r9, r8 ; [-|J|-|D]
+
+ add r12, r6, r12, lsl #8 ; [I|F|B|E]
+ str r12, [r3], r0
+
+ add r10, r7, r10, lsl #8 ; [J|H|D|G]
+ str r10, [r3]
+
+ pop {r4-r12, pc}
+
+b_hd_pred
+ ldrb r7, [r1], r2 ; l[0] = pp[3]
+ ldr lr, [r0] ; Above = pp[8|7|6|5]
+ ldrb r8, [sp, #48] ; tl = pp[4]
+ ldrb r6, [r1], r2 ; l[1] = pp[2]
+ ldrb r5, [r1], r2 ; l[2] = pp[1]
+ ldrb r4, [r1] ; l[3] = pp[0]
+
+ uxtb16 r9, lr ; p[7|5]
+ uxtb16 r10, lr, ror #8 ; p[8|6]
+
+ add r4, r4, r5, lsl #16 ; p[1|0]
+ add r5, r5, r6, lsl #16 ; p[2|1]
+ add r6, r6, r7, lsl #16 ; p[3|2]
+ add r7, r7, r8, lsl #16 ; p[4|3]
+
+ ldr r12, c00020002
+ ldr lr, c00FF00FF
+ ldr r2, c00010001
+
+ pkhtb r8, r7, r9 ; p[4|5]
+ pkhtb r1, r9, r10 ; p[7|6]
+ pkhbt r10, r8, r10, lsl #16 ; p[6|5]
+
+ uadd16 r11, r4, r5 ; [p1+p2 | p0+p1]
+ uhadd16 r11, r11, r2 ; [(p1+p2+1)>>1 | (p0+p1+1)>>1]
+ ; [B|A]
+
+ add r4, r4, r5, lsl #1 ; [p1+2*p2 | p0+2*p1]
+ add r4, r4, r6 ; [p1+2*p2+p3 | p0+2*p1+p2]
+ uxtab16 r4, r4, r12 ; [p1+2*p2+p3+2 | p0+2*p1+p2+2]
+
+ uadd16 r0, r6, r7 ; [p3+p4 | p2+p3]
+ uhadd16 r0, r0, r2 ; [(p3+p4+1)>>1 | (p2+p3+1)>>1]
+ ; [F|E]
+
+ add r5, r6, r7, lsl #1 ; [p3+2*p4 | p2+2*p3]
+ add r5, r5, r8, ror #16 ; [p3+2*p4+p5 | p2+2*p3+p4]
+ uxtab16 r5, r5, r12 ; [p3+2*p4+p5+2 | p2+2*p3+p4+2]
+
+ add r6, r12, r8, ror #16 ; [p5+2 | p4+2]
+ add r6, r6, r10, lsl #1 ; [p5+2+2*p6 | p4+2+2*p5]
+ uxtab16 r6, r6, r1 ; [p5+2+2*p6+p7 | p4+2+2*p5+p6]
+
+ ; scale down
+ and r4, lr, r4, asr #2 ; [D|C]
+ and r5, lr, r5, asr #2 ; [H|G]
+ and r6, lr, r6, asr #2 ; [J|I]
+
+ ldr lr, [sp, #44] ; dst_stride
+ ldr r3, [sp, #40] ; dst
+
+ pkhtb r2, r0, r6 ; [-|F|-|I]
+ pkhtb r12, r6, r5, asr #16 ; [-|J|-|H]
+ add r12, r12, r2, lsl #8 ; [F|J|I|H]
+ add r2, r0, r5, lsl #8 ; [H|F|G|E]
+ mov r12, r12, ror #24 ; [J|I|H|F]
+ str r12, [r3], lr
+
+ mov r7, r11, asr #16 ; [-|-|-|B]
+ str r2, [r3], lr
+ add r7, r7, r0, lsl #16 ; [-|E|-|B]
+ add r7, r7, r4, asr #8 ; [-|E|D|B]
+ add r7, r7, r5, lsl #24 ; [G|E|D|B]
+ str r7, [r3], lr
+
+ add r5, r11, r4, lsl #8 ; [D|B|C|A]
+ str r5, [r3]
+
+ pop {r4-r12, pc}
+
+
+
+b_hu_pred
+ ldrb r4, [r1], r2 ; Left[0]
+ ldr r12, c00020002
+ ldrb r5, [r1], r2 ; Left[1]
+ ldr lr, c00FF00FF
+ ldrb r6, [r1], r2 ; Left[2]
+ ldr r2, c00010001
+ ldrb r7, [r1] ; Left[3]
+
+ add r4, r4, r5, lsl #16 ; [1|0]
+ add r5, r5, r6, lsl #16 ; [2|1]
+ add r9, r6, r7, lsl #16 ; [3|2]
+
+ uadd16 r8, r4, r5 ; [p1+p2 | p0+p1]
+ uhadd16 r8, r8, r2 ; [(p1+p2+1)>>1 | (p0+p1+1)>>1]
+ ; [B|A]
+
+ add r4, r4, r5, lsl #1 ; [p1+2*p2 | p0+2*p1]
+ add r4, r4, r9 ; [p1+2*p2+p3 | p0+2*p1+p2]
+ uxtab16 r4, r4, r12 ; [p1+2*p2+p3+2 | p0+2*p1+p2+2]
+ ldr r2, [sp, #44] ; dst_stride
+ ldr r3, [sp, #40] ; dst
+ and r4, lr, r4, asr #2 ; [D|C]
+
+ add r10, r6, r7 ; [p2+p3]
+ add r11, r10, r7, lsl #1 ; [p2+3*p3]
+ add r10, r10, #1
+ add r11, r11, #2
+ mov r10, r10, asr #1 ; [E]
+ mov r11, r11, asr #2 ; [F]
+
+ add r9, r7, r9, asr #8 ; [-|-|G|G]
+ add r0, r8, r4, lsl #8 ; [D|B|C|A]
+ add r7, r9, r9, lsl #16 ; [G|G|G|G]
+
+ str r0, [r3], r2
+
+ mov r1, r8, asr #16 ; [-|-|-|B]
+ add r1, r1, r4, asr #8 ; [-|-|D|B]
+ add r1, r1, r10, lsl #16 ; [-|E|D|B]
+ add r1, r1, r11, lsl #24 ; [F|E|D|B]
+ str r1, [r3], r2
+
+ add r10, r11, lsl #8 ; [-|-|F|E]
+ add r10, r10, r9, lsl #16 ; [G|G|F|E]
+ str r10, [r3], r2
+
+ str r7, [r3]
+
+ pop {r4-r12, pc}
+
+ ENDP
+
+; constants
+c00010001
+ DCD 0x00010001
+c00020002
+ DCD 0x00020002
+c00FF00FF
+ DCD 0x00FF00FF
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/iwalsh_v6.asm b/media/libvpx/vp8/common/arm/armv6/iwalsh_v6.asm
new file mode 100644
index 000000000..31ef09cad
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/iwalsh_v6.asm
@@ -0,0 +1,136 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+ EXPORT |vp8_short_inv_walsh4x4_v6|
+
+ ARM
+ REQUIRE8
+ PRESERVE8
+
+ AREA |.text|, CODE, READONLY ; name this block of code
+
+;short vp8_short_inv_walsh4x4_v6(short *input, short *mb_dqcoeff)
+|vp8_short_inv_walsh4x4_v6| PROC
+
+ stmdb sp!, {r4 - r12, lr}
+
+ ldr r2, [r0, #0] ; [1 | 0]
+ ldr r3, [r0, #4] ; [3 | 2]
+ ldr r4, [r0, #8] ; [5 | 4]
+ ldr r5, [r0, #12] ; [7 | 6]
+ ldr r6, [r0, #16] ; [9 | 8]
+ ldr r7, [r0, #20] ; [11 | 10]
+ ldr r8, [r0, #24] ; [13 | 12]
+ ldr r9, [r0, #28] ; [15 | 14]
+
+ qadd16 r10, r2, r8 ; a1 [1+13 | 0+12]
+ qadd16 r11, r4, r6 ; b1 [5+9 | 4+8]
+ qsub16 r12, r4, r6 ; c1 [5-9 | 4-8]
+ qsub16 lr, r2, r8 ; d1 [1-13 | 0-12]
+
+ qadd16 r2, r10, r11 ; a1 + b1 [1 | 0]
+ qadd16 r4, r12, lr ; c1 + d1 [5 | 4]
+ qsub16 r6, r10, r11 ; a1 - b1 [9 | 8]
+ qsub16 r8, lr, r12 ; d1 - c1 [13 | 12]
+
+ qadd16 r10, r3, r9 ; a1 [3+15 | 2+14]
+ qadd16 r11, r5, r7 ; b1 [7+11 | 6+10]
+ qsub16 r12, r5, r7 ; c1 [7-11 | 6-10]
+ qsub16 lr, r3, r9 ; d1 [3-15 | 2-14]
+
+ qadd16 r3, r10, r11 ; a1 + b1 [3 | 2]
+ qadd16 r5, r12, lr ; c1 + d1 [7 | 6]
+ qsub16 r7, r10, r11 ; a1 - b1 [11 | 10]
+ qsub16 r9, lr, r12 ; d1 - c1 [15 | 14]
+
+ ; first transform complete
+
+ qsubaddx r10, r2, r3 ; [c1|a1] [1-2 | 0+3]
+ qaddsubx r11, r2, r3 ; [b1|d1] [1+2 | 0-3]
+ qsubaddx r12, r4, r5 ; [c1|a1] [5-6 | 4+7]
+ qaddsubx lr, r4, r5 ; [b1|d1] [5+6 | 4-7]
+
+ qaddsubx r2, r10, r11 ; [b2|c2] [c1+d1 | a1-b1]
+ qaddsubx r3, r11, r10 ; [a2|d2] [b1+a1 | d1-c1]
+ ldr r10, c0x00030003
+ qaddsubx r4, r12, lr ; [b2|c2] [c1+d1 | a1-b1]
+ qaddsubx r5, lr, r12 ; [a2|d2] [b1+a1 | d1-c1]
+
+ qadd16 r2, r2, r10 ; [b2+3|c2+3]
+ qadd16 r3, r3, r10 ; [a2+3|d2+3]
+ qadd16 r4, r4, r10 ; [b2+3|c2+3]
+ qadd16 r5, r5, r10 ; [a2+3|d2+3]
+
+ asr r12, r3, #19 ; [0]
+ strh r12, [r1], #32
+ asr lr, r2, #19 ; [1]
+ strh lr, [r1], #32
+ sxth r2, r2
+ sxth r3, r3
+ asr r2, r2, #3 ; [2]
+ strh r2, [r1], #32
+ asr r3, r3, #3 ; [3]
+ strh r3, [r1], #32
+
+ asr r12, r5, #19 ; [4]
+ strh r12, [r1], #32
+ asr lr, r4, #19 ; [5]
+ strh lr, [r1], #32
+ sxth r4, r4
+ sxth r5, r5
+ asr r4, r4, #3 ; [6]
+ strh r4, [r1], #32
+ asr r5, r5, #3 ; [7]
+ strh r5, [r1], #32
+
+ qsubaddx r2, r6, r7 ; [c1|a1] [9-10 | 8+11]
+ qaddsubx r3, r6, r7 ; [b1|d1] [9+10 | 8-11]
+ qsubaddx r4, r8, r9 ; [c1|a1] [13-14 | 12+15]
+ qaddsubx r5, r8, r9 ; [b1|d1] [13+14 | 12-15]
+
+ qaddsubx r6, r2, r3 ; [b2|c2] [c1+d1 | a1-b1]
+ qaddsubx r7, r3, r2 ; [a2|d2] [b1+a1 | d1-c1]
+ qaddsubx r8, r4, r5 ; [b2|c2] [c1+d1 | a1-b1]
+ qaddsubx r9, r5, r4 ; [a2|d2] [b1+a1 | d1-c1]
+
+ qadd16 r6, r6, r10 ; [b2+3|c2+3]
+ qadd16 r7, r7, r10 ; [a2+3|d2+3]
+ qadd16 r8, r8, r10 ; [b2+3|c2+3]
+ qadd16 r9, r9, r10 ; [a2+3|d2+3]
+
+ asr r12, r7, #19 ; [8]
+ strh r12, [r1], #32
+ asr lr, r6, #19 ; [9]
+ strh lr, [r1], #32
+ sxth r6, r6
+ sxth r7, r7
+ asr r6, r6, #3 ; [10]
+ strh r6, [r1], #32
+ asr r7, r7, #3 ; [11]
+ strh r7, [r1], #32
+
+ asr r12, r9, #19 ; [12]
+ strh r12, [r1], #32
+ asr lr, r8, #19 ; [13]
+ strh lr, [r1], #32
+ sxth r8, r8
+ sxth r9, r9
+ asr r8, r8, #3 ; [14]
+ strh r8, [r1], #32
+ asr r9, r9, #3 ; [15]
+ strh r9, [r1], #32
+
+ ldmia sp!, {r4 - r12, pc}
+ ENDP ; |vp8_short_inv_walsh4x4_v6|
+
+
+; Constant Pool
+c0x00030003 DCD 0x00030003
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/loopfilter_v6.asm b/media/libvpx/vp8/common/arm/armv6/loopfilter_v6.asm
new file mode 100644
index 000000000..1cbbbcdef
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/loopfilter_v6.asm
@@ -0,0 +1,1282 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_loop_filter_horizontal_edge_armv6|
+ EXPORT |vp8_mbloop_filter_horizontal_edge_armv6|
+ EXPORT |vp8_loop_filter_vertical_edge_armv6|
+ EXPORT |vp8_mbloop_filter_vertical_edge_armv6|
+
+ AREA |.text|, CODE, READONLY ; name this block of code
+
+ MACRO
+ TRANSPOSE_MATRIX $a0, $a1, $a2, $a3, $b0, $b1, $b2, $b3
+ ; input: $a0, $a1, $a2, $a3; output: $b0, $b1, $b2, $b3
+ ; a0: 03 02 01 00
+ ; a1: 13 12 11 10
+ ; a2: 23 22 21 20
+ ; a3: 33 32 31 30
+ ; b3 b2 b1 b0
+
+ uxtb16 $b1, $a1 ; xx 12 xx 10
+ uxtb16 $b0, $a0 ; xx 02 xx 00
+ uxtb16 $b3, $a3 ; xx 32 xx 30
+ uxtb16 $b2, $a2 ; xx 22 xx 20
+ orr $b1, $b0, $b1, lsl #8 ; 12 02 10 00
+ orr $b3, $b2, $b3, lsl #8 ; 32 22 30 20
+
+ uxtb16 $a1, $a1, ror #8 ; xx 13 xx 11
+ uxtb16 $a3, $a3, ror #8 ; xx 33 xx 31
+ uxtb16 $a0, $a0, ror #8 ; xx 03 xx 01
+ uxtb16 $a2, $a2, ror #8 ; xx 23 xx 21
+ orr $a0, $a0, $a1, lsl #8 ; 13 03 11 01
+ orr $a2, $a2, $a3, lsl #8 ; 33 23 31 21
+
+ pkhtb $b2, $b3, $b1, asr #16 ; 32 22 12 02 -- p1
+ pkhbt $b0, $b1, $b3, lsl #16 ; 30 20 10 00 -- p3
+
+ pkhtb $b3, $a2, $a0, asr #16 ; 33 23 13 03 -- p0
+ pkhbt $b1, $a0, $a2, lsl #16 ; 31 21 11 01 -- p2
+ MEND
+
+
+src RN r0
+pstep RN r1
+count RN r5
+
+;r0 unsigned char *src_ptr,
+;r1 int src_pixel_step,
+;r2 const char *blimit,
+;r3 const char *limit,
+;stack const char *thresh,
+;stack int count
+
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+|vp8_loop_filter_horizontal_edge_armv6| PROC
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+ stmdb sp!, {r4 - r11, lr}
+
+ sub src, src, pstep, lsl #2 ; move src pointer down by 4 lines
+ ldr count, [sp, #40] ; count for 8-in-parallel
+ ldr r6, [sp, #36] ; load thresh address
+ sub sp, sp, #16 ; create temp buffer
+
+ ldr r9, [src], pstep ; p3
+ ldrb r4, [r2] ; blimit
+ ldr r10, [src], pstep ; p2
+ ldrb r2, [r3] ; limit
+ ldr r11, [src], pstep ; p1
+ orr r4, r4, r4, lsl #8
+ ldrb r3, [r6] ; thresh
+ orr r2, r2, r2, lsl #8
+ mov count, count, lsl #1 ; 4-in-parallel
+ orr r4, r4, r4, lsl #16
+ orr r3, r3, r3, lsl #8
+ orr r2, r2, r2, lsl #16
+ orr r3, r3, r3, lsl #16
+
+|Hnext8|
+ ; vp8_filter_mask() function
+ ; calculate breakout conditions
+ ldr r12, [src], pstep ; p0
+
+ uqsub8 r6, r9, r10 ; p3 - p2
+ uqsub8 r7, r10, r9 ; p2 - p3
+ uqsub8 r8, r10, r11 ; p2 - p1
+ uqsub8 r10, r11, r10 ; p1 - p2
+
+ orr r6, r6, r7 ; abs (p3-p2)
+ orr r8, r8, r10 ; abs (p2-p1)
+ uqsub8 lr, r6, r2 ; compare to limit. lr: vp8_filter_mask
+ uqsub8 r8, r8, r2 ; compare to limit
+ uqsub8 r6, r11, r12 ; p1 - p0
+ orr lr, lr, r8
+ uqsub8 r7, r12, r11 ; p0 - p1
+ ldr r9, [src], pstep ; q0
+ ldr r10, [src], pstep ; q1
+ orr r6, r6, r7 ; abs (p1-p0)
+ uqsub8 r7, r6, r2 ; compare to limit
+ uqsub8 r8, r6, r3 ; compare to thresh -- save r8 for later
+ orr lr, lr, r7
+
+ uqsub8 r6, r11, r10 ; p1 - q1
+ uqsub8 r7, r10, r11 ; q1 - p1
+ uqsub8 r11, r12, r9 ; p0 - q0
+ uqsub8 r12, r9, r12 ; q0 - p0
+ orr r6, r6, r7 ; abs (p1-q1)
+ ldr r7, c0x7F7F7F7F
+ orr r12, r11, r12 ; abs (p0-q0)
+ ldr r11, [src], pstep ; q2
+ uqadd8 r12, r12, r12 ; abs (p0-q0) * 2
+ and r6, r7, r6, lsr #1 ; abs (p1-q1) / 2
+ uqsub8 r7, r9, r10 ; q0 - q1
+ uqadd8 r12, r12, r6 ; abs (p0-q0)*2 + abs (p1-q1)/2
+ uqsub8 r6, r10, r9 ; q1 - q0
+ uqsub8 r12, r12, r4 ; compare to flimit
+ uqsub8 r9, r11, r10 ; q2 - q1
+
+ orr lr, lr, r12
+
+ ldr r12, [src], pstep ; q3
+ uqsub8 r10, r10, r11 ; q1 - q2
+ orr r6, r7, r6 ; abs (q1-q0)
+ orr r10, r9, r10 ; abs (q2-q1)
+ uqsub8 r7, r6, r2 ; compare to limit
+ uqsub8 r10, r10, r2 ; compare to limit
+ uqsub8 r6, r6, r3 ; compare to thresh -- save r6 for later
+ orr lr, lr, r7
+ orr lr, lr, r10
+
+ uqsub8 r10, r12, r11 ; q3 - q2
+ uqsub8 r9, r11, r12 ; q2 - q3
+
+ mvn r11, #0 ; r11 == -1
+
+ orr r10, r10, r9 ; abs (q3-q2)
+ uqsub8 r10, r10, r2 ; compare to limit
+
+ mov r12, #0
+ orr lr, lr, r10
+ sub src, src, pstep, lsl #2
+
+ usub8 lr, r12, lr ; use usub8 instead of ssub8
+ sel lr, r11, r12 ; filter mask: lr
+
+ cmp lr, #0
+ beq hskip_filter ; skip filtering
+
+ sub src, src, pstep, lsl #1 ; move src pointer down by 6 lines
+
+ ;vp8_hevmask() function
+ ;calculate high edge variance
+ orr r10, r6, r8 ; calculate vp8_hevmask
+
+ ldr r7, [src], pstep ; p1
+
+ usub8 r10, r12, r10 ; use usub8 instead of ssub8
+ sel r6, r12, r11 ; obtain vp8_hevmask: r6
+
+ ;vp8_filter() function
+ ldr r8, [src], pstep ; p0
+ ldr r12, c0x80808080
+ ldr r9, [src], pstep ; q0
+ ldr r10, [src], pstep ; q1
+
+ eor r7, r7, r12 ; p1 offset to convert to a signed value
+ eor r8, r8, r12 ; p0 offset to convert to a signed value
+ eor r9, r9, r12 ; q0 offset to convert to a signed value
+ eor r10, r10, r12 ; q1 offset to convert to a signed value
+
+ str r9, [sp] ; store qs0 temporarily
+ str r8, [sp, #4] ; store ps0 temporarily
+ str r10, [sp, #8] ; store qs1 temporarily
+ str r7, [sp, #12] ; store ps1 temporarily
+
+ qsub8 r7, r7, r10 ; vp8_signed_char_clamp(ps1-qs1)
+ qsub8 r8, r9, r8 ; vp8_signed_char_clamp(vp8_filter + 3 * ( qs0 - ps0))
+
+ and r7, r7, r6 ; vp8_filter (r7) &= hev
+
+ qadd8 r7, r7, r8
+ ldr r9, c0x03030303 ; r9 = 3 --modified for vp8
+
+ qadd8 r7, r7, r8
+ ldr r10, c0x04040404
+
+ qadd8 r7, r7, r8
+ and r7, r7, lr ; vp8_filter &= mask;
+
+ ;modify code for vp8 -- Filter1 = vp8_filter (r7)
+ qadd8 r8 , r7 , r9 ; Filter2 (r8) = vp8_signed_char_clamp(vp8_filter+3)
+ qadd8 r7 , r7 , r10 ; vp8_filter = vp8_signed_char_clamp(vp8_filter+4)
+
+ mov r9, #0
+ shadd8 r8 , r8 , r9 ; Filter2 >>= 3
+ shadd8 r7 , r7 , r9 ; vp8_filter >>= 3
+ shadd8 r8 , r8 , r9
+ shadd8 r7 , r7 , r9
+ shadd8 lr , r8 , r9 ; lr: Filter2
+ shadd8 r7 , r7 , r9 ; r7: filter
+
+ ;usub8 lr, r8, r10 ; s = (s==4)*-1
+ ;sel lr, r11, r9
+ ;usub8 r8, r10, r8
+ ;sel r8, r11, r9
+ ;and r8, r8, lr ; -1 for each element that equals 4
+
+ ;calculate output
+ ;qadd8 lr, r8, r7 ; u = vp8_signed_char_clamp(s + vp8_filter)
+
+ ldr r8, [sp] ; load qs0
+ ldr r9, [sp, #4] ; load ps0
+
+ ldr r10, c0x01010101
+
+ qsub8 r8 ,r8, r7 ; u = vp8_signed_char_clamp(qs0 - vp8_filter)
+ qadd8 r9, r9, lr ; u = vp8_signed_char_clamp(ps0 + Filter2)
+
+ ;end of modification for vp8
+
+ mov lr, #0
+ sadd8 r7, r7 , r10 ; vp8_filter += 1
+ shadd8 r7, r7, lr ; vp8_filter >>= 1
+
+ ldr r11, [sp, #12] ; load ps1
+ ldr r10, [sp, #8] ; load qs1
+
+ bic r7, r7, r6 ; vp8_filter &= ~hev
+ sub src, src, pstep, lsl #2
+
+ qadd8 r11, r11, r7 ; u = vp8_signed_char_clamp(ps1 + vp8_filter)
+ qsub8 r10, r10,r7 ; u = vp8_signed_char_clamp(qs1 - vp8_filter)
+
+ eor r11, r11, r12 ; *op1 = u^0x80
+ str r11, [src], pstep ; store op1
+ eor r9, r9, r12 ; *op0 = u^0x80
+ str r9, [src], pstep ; store op0 result
+ eor r8, r8, r12 ; *oq0 = u^0x80
+ str r8, [src], pstep ; store oq0 result
+ eor r10, r10, r12 ; *oq1 = u^0x80
+ str r10, [src], pstep ; store oq1
+
+ sub src, src, pstep, lsl #1
+
+|hskip_filter|
+ add src, src, #4
+ sub src, src, pstep, lsl #2
+
+ subs count, count, #1
+
+ ldrne r9, [src], pstep ; p3
+ ldrne r10, [src], pstep ; p2
+ ldrne r11, [src], pstep ; p1
+
+ bne Hnext8
+
+ add sp, sp, #16
+ ldmia sp!, {r4 - r11, pc}
+ ENDP ; |vp8_loop_filter_horizontal_edge_armv6|
+
+
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+|vp8_mbloop_filter_horizontal_edge_armv6| PROC
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+ stmdb sp!, {r4 - r11, lr}
+
+ sub src, src, pstep, lsl #2 ; move src pointer down by 4 lines
+ ldr count, [sp, #40] ; count for 8-in-parallel
+ ldr r6, [sp, #36] ; load thresh address
+ sub sp, sp, #16 ; create temp buffer
+
+ ldr r9, [src], pstep ; p3
+ ldrb r4, [r2] ; blimit
+ ldr r10, [src], pstep ; p2
+ ldrb r2, [r3] ; limit
+ ldr r11, [src], pstep ; p1
+ orr r4, r4, r4, lsl #8
+ ldrb r3, [r6] ; thresh
+ orr r2, r2, r2, lsl #8
+ mov count, count, lsl #1 ; 4-in-parallel
+ orr r4, r4, r4, lsl #16
+ orr r3, r3, r3, lsl #8
+ orr r2, r2, r2, lsl #16
+ orr r3, r3, r3, lsl #16
+
+|MBHnext8|
+
+ ; vp8_filter_mask() function
+ ; calculate breakout conditions
+ ldr r12, [src], pstep ; p0
+
+ uqsub8 r6, r9, r10 ; p3 - p2
+ uqsub8 r7, r10, r9 ; p2 - p3
+ uqsub8 r8, r10, r11 ; p2 - p1
+ uqsub8 r10, r11, r10 ; p1 - p2
+
+ orr r6, r6, r7 ; abs (p3-p2)
+ orr r8, r8, r10 ; abs (p2-p1)
+ uqsub8 lr, r6, r2 ; compare to limit. lr: vp8_filter_mask
+ uqsub8 r8, r8, r2 ; compare to limit
+
+ uqsub8 r6, r11, r12 ; p1 - p0
+ orr lr, lr, r8
+ uqsub8 r7, r12, r11 ; p0 - p1
+ ldr r9, [src], pstep ; q0
+ ldr r10, [src], pstep ; q1
+ orr r6, r6, r7 ; abs (p1-p0)
+ uqsub8 r7, r6, r2 ; compare to limit
+ uqsub8 r8, r6, r3 ; compare to thresh -- save r8 for later
+ orr lr, lr, r7
+
+ uqsub8 r6, r11, r10 ; p1 - q1
+ uqsub8 r7, r10, r11 ; q1 - p1
+ uqsub8 r11, r12, r9 ; p0 - q0
+ uqsub8 r12, r9, r12 ; q0 - p0
+ orr r6, r6, r7 ; abs (p1-q1)
+ ldr r7, c0x7F7F7F7F
+ orr r12, r11, r12 ; abs (p0-q0)
+ ldr r11, [src], pstep ; q2
+ uqadd8 r12, r12, r12 ; abs (p0-q0) * 2
+ and r6, r7, r6, lsr #1 ; abs (p1-q1) / 2
+ uqsub8 r7, r9, r10 ; q0 - q1
+ uqadd8 r12, r12, r6 ; abs (p0-q0)*2 + abs (p1-q1)/2
+ uqsub8 r6, r10, r9 ; q1 - q0
+ uqsub8 r12, r12, r4 ; compare to flimit
+ uqsub8 r9, r11, r10 ; q2 - q1
+
+ orr lr, lr, r12
+
+ ldr r12, [src], pstep ; q3
+
+ uqsub8 r10, r10, r11 ; q1 - q2
+ orr r6, r7, r6 ; abs (q1-q0)
+ orr r10, r9, r10 ; abs (q2-q1)
+ uqsub8 r7, r6, r2 ; compare to limit
+ uqsub8 r10, r10, r2 ; compare to limit
+ uqsub8 r6, r6, r3 ; compare to thresh -- save r6 for later
+ orr lr, lr, r7
+ orr lr, lr, r10
+
+ uqsub8 r10, r12, r11 ; q3 - q2
+ uqsub8 r9, r11, r12 ; q2 - q3
+
+ mvn r11, #0 ; r11 == -1
+
+ orr r10, r10, r9 ; abs (q3-q2)
+ uqsub8 r10, r10, r2 ; compare to limit
+
+ mov r12, #0
+
+ orr lr, lr, r10
+
+ usub8 lr, r12, lr ; use usub8 instead of ssub8
+ sel lr, r11, r12 ; filter mask: lr
+
+ cmp lr, #0
+ beq mbhskip_filter ; skip filtering
+
+ ;vp8_hevmask() function
+ ;calculate high edge variance
+ sub src, src, pstep, lsl #2 ; move src pointer down by 6 lines
+ sub src, src, pstep, lsl #1
+
+ orr r10, r6, r8
+ ldr r7, [src], pstep ; p1
+
+ usub8 r10, r12, r10
+ sel r6, r12, r11 ; hev mask: r6
+
+ ;vp8_mbfilter() function
+ ;p2, q2 are only needed at the end. Don't need to load them in now.
+ ldr r8, [src], pstep ; p0
+ ldr r12, c0x80808080
+ ldr r9, [src], pstep ; q0
+ ldr r10, [src] ; q1
+
+ eor r7, r7, r12 ; ps1
+ eor r8, r8, r12 ; ps0
+ eor r9, r9, r12 ; qs0
+ eor r10, r10, r12 ; qs1
+
+ qsub8 r12, r9, r8 ; vp8_signed_char_clamp(vp8_filter + 3 * ( qs0 - ps0))
+ str r7, [sp, #12] ; store ps1 temporarily
+ qsub8 r7, r7, r10 ; vp8_signed_char_clamp(ps1-qs1)
+ str r10, [sp, #8] ; store qs1 temporarily
+ qadd8 r7, r7, r12
+ str r9, [sp] ; store qs0 temporarily
+ qadd8 r7, r7, r12
+ str r8, [sp, #4] ; store ps0 temporarily
+ qadd8 r7, r7, r12 ; vp8_filter: r7
+
+ ldr r10, c0x03030303 ; r10 = 3 --modified for vp8
+ ldr r9, c0x04040404
+
+ and r7, r7, lr ; vp8_filter &= mask (lr is free)
+
+ mov r12, r7 ; Filter2: r12
+ and r12, r12, r6 ; Filter2 &= hev
+
+ ;modify code for vp8
+ ;save bottom 3 bits so that we round one side +4 and the other +3
+ qadd8 r8 , r12 , r9 ; Filter1 (r8) = vp8_signed_char_clamp(Filter2+4)
+ qadd8 r12 , r12 , r10 ; Filter2 (r12) = vp8_signed_char_clamp(Filter2+3)
+
+ mov r10, #0
+ shadd8 r8 , r8 , r10 ; Filter1 >>= 3
+ shadd8 r12 , r12 , r10 ; Filter2 >>= 3
+ shadd8 r8 , r8 , r10
+ shadd8 r12 , r12 , r10
+ shadd8 r8 , r8 , r10 ; r8: Filter1
+ shadd8 r12 , r12 , r10 ; r12: Filter2
+
+ ldr r9, [sp] ; load qs0
+ ldr r11, [sp, #4] ; load ps0
+
+ qsub8 r9 , r9, r8 ; qs0 = vp8_signed_char_clamp(qs0 - Filter1)
+ qadd8 r11, r11, r12 ; ps0 = vp8_signed_char_clamp(ps0 + Filter2)
+
+ ;save bottom 3 bits so that we round one side +4 and the other +3
+ ;and r8, r12, r10 ; s = Filter2 & 7 (s: r8)
+ ;qadd8 r12 , r12 , r9 ; Filter2 = vp8_signed_char_clamp(Filter2+4)
+ ;mov r10, #0
+ ;shadd8 r12 , r12 , r10 ; Filter2 >>= 3
+ ;usub8 lr, r8, r9 ; s = (s==4)*-1
+ ;sel lr, r11, r10
+ ;shadd8 r12 , r12 , r10
+ ;usub8 r8, r9, r8
+ ;sel r8, r11, r10
+ ;ldr r9, [sp] ; load qs0
+ ;ldr r11, [sp, #4] ; load ps0
+ ;shadd8 r12 , r12 , r10
+ ;and r8, r8, lr ; -1 for each element that equals 4
+ ;qadd8 r10, r8, r12 ; u = vp8_signed_char_clamp(s + Filter2)
+ ;qsub8 r9 , r9, r12 ; qs0 = vp8_signed_char_clamp(qs0 - Filter2)
+ ;qadd8 r11, r11, r10 ; ps0 = vp8_signed_char_clamp(ps0 + u)
+
+ ;end of modification for vp8
+
+ bic r12, r7, r6 ; vp8_filter &= ~hev ( r6 is free)
+ ;mov r12, r7
+
+ ;roughly 3/7th difference across boundary
+ mov lr, #0x1b ; 27
+ mov r7, #0x3f ; 63
+
+ sxtb16 r6, r12
+ sxtb16 r10, r12, ror #8
+ smlabb r8, r6, lr, r7
+ smlatb r6, r6, lr, r7
+ smlabb r7, r10, lr, r7
+ smultb r10, r10, lr
+ ssat r8, #8, r8, asr #7
+ ssat r6, #8, r6, asr #7
+ add r10, r10, #63
+ ssat r7, #8, r7, asr #7
+ ssat r10, #8, r10, asr #7
+
+ ldr lr, c0x80808080
+
+ pkhbt r6, r8, r6, lsl #16
+ pkhbt r10, r7, r10, lsl #16
+ uxtb16 r6, r6
+ uxtb16 r10, r10
+
+ sub src, src, pstep
+
+ orr r10, r6, r10, lsl #8 ; u = vp8_signed_char_clamp((63 + Filter2 * 27)>>7)
+
+ qsub8 r8, r9, r10 ; s = vp8_signed_char_clamp(qs0 - u)
+ qadd8 r10, r11, r10 ; s = vp8_signed_char_clamp(ps0 + u)
+ eor r8, r8, lr ; *oq0 = s^0x80
+ str r8, [src] ; store *oq0
+ sub src, src, pstep
+ eor r10, r10, lr ; *op0 = s^0x80
+ str r10, [src] ; store *op0
+
+ ;roughly 2/7th difference across boundary
+ mov lr, #0x12 ; 18
+ mov r7, #0x3f ; 63
+
+ sxtb16 r6, r12
+ sxtb16 r10, r12, ror #8
+ smlabb r8, r6, lr, r7
+ smlatb r6, r6, lr, r7
+ smlabb r9, r10, lr, r7
+ smlatb r10, r10, lr, r7
+ ssat r8, #8, r8, asr #7
+ ssat r6, #8, r6, asr #7
+ ssat r9, #8, r9, asr #7
+ ssat r10, #8, r10, asr #7
+
+ ldr lr, c0x80808080
+
+ pkhbt r6, r8, r6, lsl #16
+ pkhbt r10, r9, r10, lsl #16
+
+ ldr r9, [sp, #8] ; load qs1
+ ldr r11, [sp, #12] ; load ps1
+
+ uxtb16 r6, r6
+ uxtb16 r10, r10
+
+ sub src, src, pstep
+
+ orr r10, r6, r10, lsl #8 ; u = vp8_signed_char_clamp((63 + Filter2 * 18)>>7)
+
+ qadd8 r11, r11, r10 ; s = vp8_signed_char_clamp(ps1 + u)
+ qsub8 r8, r9, r10 ; s = vp8_signed_char_clamp(qs1 - u)
+ eor r11, r11, lr ; *op1 = s^0x80
+ str r11, [src], pstep ; store *op1
+ eor r8, r8, lr ; *oq1 = s^0x80
+ add src, src, pstep, lsl #1
+
+ mov r7, #0x3f ; 63
+
+ str r8, [src], pstep ; store *oq1
+
+ ;roughly 1/7th difference across boundary
+ mov lr, #0x9 ; 9
+ ldr r9, [src] ; load q2
+
+ sxtb16 r6, r12
+ sxtb16 r10, r12, ror #8
+ smlabb r8, r6, lr, r7
+ smlatb r6, r6, lr, r7
+ smlabb r12, r10, lr, r7
+ smlatb r10, r10, lr, r7
+ ssat r8, #8, r8, asr #7
+ ssat r6, #8, r6, asr #7
+ ssat r12, #8, r12, asr #7
+ ssat r10, #8, r10, asr #7
+
+ sub src, src, pstep, lsl #2
+
+ pkhbt r6, r8, r6, lsl #16
+ pkhbt r10, r12, r10, lsl #16
+
+ sub src, src, pstep
+ ldr lr, c0x80808080
+
+ ldr r11, [src] ; load p2
+
+ uxtb16 r6, r6
+ uxtb16 r10, r10
+
+ eor r9, r9, lr
+ eor r11, r11, lr
+
+ orr r10, r6, r10, lsl #8 ; u = vp8_signed_char_clamp((63 + Filter2 * 9)>>7)
+
+ qadd8 r8, r11, r10 ; s = vp8_signed_char_clamp(ps2 + u)
+ qsub8 r10, r9, r10 ; s = vp8_signed_char_clamp(qs2 - u)
+ eor r8, r8, lr ; *op2 = s^0x80
+ str r8, [src], pstep, lsl #2 ; store *op2
+ add src, src, pstep
+ eor r10, r10, lr ; *oq2 = s^0x80
+ str r10, [src], pstep, lsl #1 ; store *oq2
+
+|mbhskip_filter|
+ add src, src, #4
+ sub src, src, pstep, lsl #3
+ subs count, count, #1
+
+ ldrne r9, [src], pstep ; p3
+ ldrne r10, [src], pstep ; p2
+ ldrne r11, [src], pstep ; p1
+
+ bne MBHnext8
+
+ add sp, sp, #16
+ ldmia sp!, {r4 - r11, pc}
+ ENDP ; |vp8_mbloop_filter_horizontal_edge_armv6|
+
+
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+|vp8_loop_filter_vertical_edge_armv6| PROC
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+ stmdb sp!, {r4 - r11, lr}
+
+ sub src, src, #4 ; move src pointer down by 4
+ ldr count, [sp, #40] ; count for 8-in-parallel
+ ldr r12, [sp, #36] ; load thresh address
+ sub sp, sp, #16 ; create temp buffer
+
+ ldr r6, [src], pstep ; load source data
+ ldrb r4, [r2] ; blimit
+ ldr r7, [src], pstep
+ ldrb r2, [r3] ; limit
+ ldr r8, [src], pstep
+ orr r4, r4, r4, lsl #8
+ ldrb r3, [r12] ; thresh
+ orr r2, r2, r2, lsl #8
+ ldr lr, [src], pstep
+ mov count, count, lsl #1 ; 4-in-parallel
+ orr r4, r4, r4, lsl #16
+ orr r3, r3, r3, lsl #8
+ orr r2, r2, r2, lsl #16
+ orr r3, r3, r3, lsl #16
+
+|Vnext8|
+
+ ; vp8_filter_mask() function
+ ; calculate breakout conditions
+ ; transpose the source data for 4-in-parallel operation
+ TRANSPOSE_MATRIX r6, r7, r8, lr, r9, r10, r11, r12
+
+ uqsub8 r7, r9, r10 ; p3 - p2
+ uqsub8 r8, r10, r9 ; p2 - p3
+ uqsub8 r9, r10, r11 ; p2 - p1
+ uqsub8 r10, r11, r10 ; p1 - p2
+ orr r7, r7, r8 ; abs (p3-p2)
+ orr r10, r9, r10 ; abs (p2-p1)
+ uqsub8 lr, r7, r2 ; compare to limit. lr: vp8_filter_mask
+ uqsub8 r10, r10, r2 ; compare to limit
+
+ sub src, src, pstep, lsl #2 ; move src pointer down by 4 lines
+
+ orr lr, lr, r10
+
+ uqsub8 r6, r11, r12 ; p1 - p0
+ uqsub8 r7, r12, r11 ; p0 - p1
+ add src, src, #4 ; move src pointer up by 4
+ orr r6, r6, r7 ; abs (p1-p0)
+ str r11, [sp, #12] ; save p1
+ uqsub8 r10, r6, r2 ; compare to limit
+ uqsub8 r11, r6, r3 ; compare to thresh
+ orr lr, lr, r10
+
+ ; transpose uses 8 regs(r6 - r12 and lr). Need to save reg value now
+ ; transpose the source data for 4-in-parallel operation
+ ldr r6, [src], pstep ; load source data
+ str r11, [sp] ; push r11 to stack
+ ldr r7, [src], pstep
+ str r12, [sp, #4] ; save current reg before load q0 - q3 data
+ ldr r8, [src], pstep
+ str lr, [sp, #8]
+ ldr lr, [src], pstep
+
+ TRANSPOSE_MATRIX r6, r7, r8, lr, r9, r10, r11, r12
+
+ ldr lr, [sp, #8] ; load back (f)limit accumulator
+
+ uqsub8 r6, r12, r11 ; q3 - q2
+ uqsub8 r7, r11, r12 ; q2 - q3
+ uqsub8 r12, r11, r10 ; q2 - q1
+ uqsub8 r11, r10, r11 ; q1 - q2
+ orr r6, r6, r7 ; abs (q3-q2)
+ orr r7, r12, r11 ; abs (q2-q1)
+ uqsub8 r6, r6, r2 ; compare to limit
+ uqsub8 r7, r7, r2 ; compare to limit
+ ldr r11, [sp, #4] ; load back p0
+ ldr r12, [sp, #12] ; load back p1
+ orr lr, lr, r6
+ orr lr, lr, r7
+
+ uqsub8 r6, r11, r9 ; p0 - q0
+ uqsub8 r7, r9, r11 ; q0 - p0
+ uqsub8 r8, r12, r10 ; p1 - q1
+ uqsub8 r11, r10, r12 ; q1 - p1
+ orr r6, r6, r7 ; abs (p0-q0)
+ ldr r7, c0x7F7F7F7F
+ orr r8, r8, r11 ; abs (p1-q1)
+ uqadd8 r6, r6, r6 ; abs (p0-q0) * 2
+ and r8, r7, r8, lsr #1 ; abs (p1-q1) / 2
+ uqsub8 r11, r10, r9 ; q1 - q0
+ uqadd8 r6, r8, r6 ; abs (p0-q0)*2 + abs (p1-q1)/2
+ uqsub8 r12, r9, r10 ; q0 - q1
+ uqsub8 r6, r6, r4 ; compare to flimit
+
+ orr r9, r11, r12 ; abs (q1-q0)
+ uqsub8 r8, r9, r2 ; compare to limit
+ uqsub8 r10, r9, r3 ; compare to thresh
+ orr lr, lr, r6
+ orr lr, lr, r8
+
+ mvn r11, #0 ; r11 == -1
+ mov r12, #0
+
+ usub8 lr, r12, lr
+ ldr r9, [sp] ; load the compared result
+ sel lr, r11, r12 ; filter mask: lr
+
+ cmp lr, #0
+ beq vskip_filter ; skip filtering
+
+ ;vp8_hevmask() function
+ ;calculate high edge variance
+
+ sub src, src, pstep, lsl #2 ; move src pointer down by 4 lines
+
+ orr r9, r9, r10
+
+ ldrh r7, [src, #-2]
+ ldrh r8, [src], pstep
+
+ usub8 r9, r12, r9
+ sel r6, r12, r11 ; hev mask: r6
+
+ ;vp8_filter() function
+ ; load soure data to r6, r11, r12, lr
+ ldrh r9, [src, #-2]
+ ldrh r10, [src], pstep
+
+ pkhbt r12, r7, r8, lsl #16
+
+ ldrh r7, [src, #-2]
+ ldrh r8, [src], pstep
+
+ pkhbt r11, r9, r10, lsl #16
+
+ ldrh r9, [src, #-2]
+ ldrh r10, [src], pstep
+
+ ; Transpose needs 8 regs(r6 - r12, and lr). Save r6 and lr first
+ str r6, [sp]
+ str lr, [sp, #4]
+
+ pkhbt r6, r7, r8, lsl #16
+ pkhbt lr, r9, r10, lsl #16
+
+ ;transpose r12, r11, r6, lr to r7, r8, r9, r10
+ TRANSPOSE_MATRIX r12, r11, r6, lr, r7, r8, r9, r10
+
+ ;load back hev_mask r6 and filter_mask lr
+ ldr r12, c0x80808080
+ ldr r6, [sp]
+ ldr lr, [sp, #4]
+
+ eor r7, r7, r12 ; p1 offset to convert to a signed value
+ eor r8, r8, r12 ; p0 offset to convert to a signed value
+ eor r9, r9, r12 ; q0 offset to convert to a signed value
+ eor r10, r10, r12 ; q1 offset to convert to a signed value
+
+ str r9, [sp] ; store qs0 temporarily
+ str r8, [sp, #4] ; store ps0 temporarily
+ str r10, [sp, #8] ; store qs1 temporarily
+ str r7, [sp, #12] ; store ps1 temporarily
+
+ qsub8 r7, r7, r10 ; vp8_signed_char_clamp(ps1-qs1)
+ qsub8 r8, r9, r8 ; vp8_signed_char_clamp(vp8_filter + 3 * ( qs0 - ps0))
+
+ and r7, r7, r6 ; vp8_filter (r7) &= hev (r7 : filter)
+
+ qadd8 r7, r7, r8
+ ldr r9, c0x03030303 ; r9 = 3 --modified for vp8
+
+ qadd8 r7, r7, r8
+ ldr r10, c0x04040404
+
+ qadd8 r7, r7, r8
+ ;mvn r11, #0 ; r11 == -1
+
+ and r7, r7, lr ; vp8_filter &= mask
+
+ ;modify code for vp8 -- Filter1 = vp8_filter (r7)
+ qadd8 r8 , r7 , r9 ; Filter2 (r8) = vp8_signed_char_clamp(vp8_filter+3)
+ qadd8 r7 , r7 , r10 ; vp8_filter = vp8_signed_char_clamp(vp8_filter+4)
+
+ mov r9, #0
+ shadd8 r8 , r8 , r9 ; Filter2 >>= 3
+ shadd8 r7 , r7 , r9 ; vp8_filter >>= 3
+ shadd8 r8 , r8 , r9
+ shadd8 r7 , r7 , r9
+ shadd8 lr , r8 , r9 ; lr: filter2
+ shadd8 r7 , r7 , r9 ; r7: filter
+
+ ;usub8 lr, r8, r10 ; s = (s==4)*-1
+ ;sel lr, r11, r9
+ ;usub8 r8, r10, r8
+ ;sel r8, r11, r9
+ ;and r8, r8, lr ; -1 for each element that equals 4 -- r8: s
+
+ ;calculate output
+ ;qadd8 lr, r8, r7 ; u = vp8_signed_char_clamp(s + vp8_filter)
+
+ ldr r8, [sp] ; load qs0
+ ldr r9, [sp, #4] ; load ps0
+
+ ldr r10, c0x01010101
+
+ qsub8 r8, r8, r7 ; u = vp8_signed_char_clamp(qs0 - vp8_filter)
+ qadd8 r9, r9, lr ; u = vp8_signed_char_clamp(ps0 + Filter2)
+ ;end of modification for vp8
+
+ eor r8, r8, r12
+ eor r9, r9, r12
+
+ mov lr, #0
+
+ sadd8 r7, r7, r10
+ shadd8 r7, r7, lr
+
+ ldr r10, [sp, #8] ; load qs1
+ ldr r11, [sp, #12] ; load ps1
+
+ bic r7, r7, r6 ; r7: vp8_filter
+
+ qsub8 r10 , r10, r7 ; u = vp8_signed_char_clamp(qs1 - vp8_filter)
+ qadd8 r11, r11, r7 ; u = vp8_signed_char_clamp(ps1 + vp8_filter)
+ eor r10, r10, r12
+ eor r11, r11, r12
+
+ sub src, src, pstep, lsl #2
+
+ ;we can use TRANSPOSE_MATRIX macro to transpose output - input: q1, q0, p0, p1
+ ;output is b0, b1, b2, b3
+ ;b0: 03 02 01 00
+ ;b1: 13 12 11 10
+ ;b2: 23 22 21 20
+ ;b3: 33 32 31 30
+ ; p1 p0 q0 q1
+ ; (a3 a2 a1 a0)
+ TRANSPOSE_MATRIX r11, r9, r8, r10, r6, r7, r12, lr
+
+ strh r6, [src, #-2] ; store the result
+ mov r6, r6, lsr #16
+ strh r6, [src], pstep
+
+ strh r7, [src, #-2]
+ mov r7, r7, lsr #16
+ strh r7, [src], pstep
+
+ strh r12, [src, #-2]
+ mov r12, r12, lsr #16
+ strh r12, [src], pstep
+
+ strh lr, [src, #-2]
+ mov lr, lr, lsr #16
+ strh lr, [src], pstep
+
+|vskip_filter|
+ sub src, src, #4
+ subs count, count, #1
+
+ ldrne r6, [src], pstep ; load source data
+ ldrne r7, [src], pstep
+ ldrne r8, [src], pstep
+ ldrne lr, [src], pstep
+
+ bne Vnext8
+
+ add sp, sp, #16
+
+ ldmia sp!, {r4 - r11, pc}
+ ENDP ; |vp8_loop_filter_vertical_edge_armv6|
+
+
+
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+|vp8_mbloop_filter_vertical_edge_armv6| PROC
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+ stmdb sp!, {r4 - r11, lr}
+
+ sub src, src, #4 ; move src pointer down by 4
+ ldr count, [sp, #40] ; count for 8-in-parallel
+ ldr r12, [sp, #36] ; load thresh address
+ pld [src, #23] ; preload for next block
+ sub sp, sp, #16 ; create temp buffer
+
+ ldr r6, [src], pstep ; load source data
+ ldrb r4, [r2] ; blimit
+ pld [src, #23]
+ ldr r7, [src], pstep
+ ldrb r2, [r3] ; limit
+ pld [src, #23]
+ ldr r8, [src], pstep
+ orr r4, r4, r4, lsl #8
+ ldrb r3, [r12] ; thresh
+ orr r2, r2, r2, lsl #8
+ pld [src, #23]
+ ldr lr, [src], pstep
+ mov count, count, lsl #1 ; 4-in-parallel
+ orr r4, r4, r4, lsl #16
+ orr r3, r3, r3, lsl #8
+ orr r2, r2, r2, lsl #16
+ orr r3, r3, r3, lsl #16
+
+|MBVnext8|
+ ; vp8_filter_mask() function
+ ; calculate breakout conditions
+ ; transpose the source data for 4-in-parallel operation
+ TRANSPOSE_MATRIX r6, r7, r8, lr, r9, r10, r11, r12
+
+ uqsub8 r7, r9, r10 ; p3 - p2
+ uqsub8 r8, r10, r9 ; p2 - p3
+ uqsub8 r9, r10, r11 ; p2 - p1
+ uqsub8 r10, r11, r10 ; p1 - p2
+ orr r7, r7, r8 ; abs (p3-p2)
+ orr r10, r9, r10 ; abs (p2-p1)
+ uqsub8 lr, r7, r2 ; compare to limit. lr: vp8_filter_mask
+ uqsub8 r10, r10, r2 ; compare to limit
+
+ sub src, src, pstep, lsl #2 ; move src pointer down by 4 lines
+
+ orr lr, lr, r10
+
+ uqsub8 r6, r11, r12 ; p1 - p0
+ uqsub8 r7, r12, r11 ; p0 - p1
+ add src, src, #4 ; move src pointer up by 4
+ orr r6, r6, r7 ; abs (p1-p0)
+ str r11, [sp, #12] ; save p1
+ uqsub8 r10, r6, r2 ; compare to limit
+ uqsub8 r11, r6, r3 ; compare to thresh
+ orr lr, lr, r10
+
+ ; transpose uses 8 regs(r6 - r12 and lr). Need to save reg value now
+ ; transpose the source data for 4-in-parallel operation
+ ldr r6, [src], pstep ; load source data
+ str r11, [sp] ; push r11 to stack
+ ldr r7, [src], pstep
+ str r12, [sp, #4] ; save current reg before load q0 - q3 data
+ ldr r8, [src], pstep
+ str lr, [sp, #8]
+ ldr lr, [src], pstep
+
+
+ TRANSPOSE_MATRIX r6, r7, r8, lr, r9, r10, r11, r12
+
+ ldr lr, [sp, #8] ; load back (f)limit accumulator
+
+ uqsub8 r6, r12, r11 ; q3 - q2
+ uqsub8 r7, r11, r12 ; q2 - q3
+ uqsub8 r12, r11, r10 ; q2 - q1
+ uqsub8 r11, r10, r11 ; q1 - q2
+ orr r6, r6, r7 ; abs (q3-q2)
+ orr r7, r12, r11 ; abs (q2-q1)
+ uqsub8 r6, r6, r2 ; compare to limit
+ uqsub8 r7, r7, r2 ; compare to limit
+ ldr r11, [sp, #4] ; load back p0
+ ldr r12, [sp, #12] ; load back p1
+ orr lr, lr, r6
+ orr lr, lr, r7
+
+ uqsub8 r6, r11, r9 ; p0 - q0
+ uqsub8 r7, r9, r11 ; q0 - p0
+ uqsub8 r8, r12, r10 ; p1 - q1
+ uqsub8 r11, r10, r12 ; q1 - p1
+ orr r6, r6, r7 ; abs (p0-q0)
+ ldr r7, c0x7F7F7F7F
+ orr r8, r8, r11 ; abs (p1-q1)
+ uqadd8 r6, r6, r6 ; abs (p0-q0) * 2
+ and r8, r7, r8, lsr #1 ; abs (p1-q1) / 2
+ uqsub8 r11, r10, r9 ; q1 - q0
+ uqadd8 r6, r8, r6 ; abs (p0-q0)*2 + abs (p1-q1)/2
+ uqsub8 r12, r9, r10 ; q0 - q1
+ uqsub8 r6, r6, r4 ; compare to flimit
+
+ orr r9, r11, r12 ; abs (q1-q0)
+ uqsub8 r8, r9, r2 ; compare to limit
+ uqsub8 r10, r9, r3 ; compare to thresh
+ orr lr, lr, r6
+ orr lr, lr, r8
+
+ mvn r11, #0 ; r11 == -1
+ mov r12, #0
+
+ usub8 lr, r12, lr
+ ldr r9, [sp] ; load the compared result
+ sel lr, r11, r12 ; filter mask: lr
+
+ cmp lr, #0
+ beq mbvskip_filter ; skip filtering
+
+
+
+ ;vp8_hevmask() function
+ ;calculate high edge variance
+
+ sub src, src, pstep, lsl #2 ; move src pointer down by 4 lines
+
+ orr r9, r9, r10
+
+ ldrh r7, [src, #-2]
+ ldrh r8, [src], pstep
+
+ usub8 r9, r12, r9
+ sel r6, r12, r11 ; hev mask: r6
+
+
+ ; vp8_mbfilter() function
+ ; p2, q2 are only needed at the end. Don't need to load them in now.
+ ; Transpose needs 8 regs(r6 - r12, and lr). Save r6 and lr first
+ ; load soure data to r6, r11, r12, lr
+ ldrh r9, [src, #-2]
+ ldrh r10, [src], pstep
+
+ pkhbt r12, r7, r8, lsl #16
+
+ ldrh r7, [src, #-2]
+ ldrh r8, [src], pstep
+
+ pkhbt r11, r9, r10, lsl #16
+
+ ldrh r9, [src, #-2]
+ ldrh r10, [src], pstep
+
+ str r6, [sp] ; save r6
+ str lr, [sp, #4] ; save lr
+
+ pkhbt r6, r7, r8, lsl #16
+ pkhbt lr, r9, r10, lsl #16
+
+ ;transpose r12, r11, r6, lr to p1, p0, q0, q1
+ TRANSPOSE_MATRIX r12, r11, r6, lr, r7, r8, r9, r10
+
+ ;load back hev_mask r6 and filter_mask lr
+ ldr r12, c0x80808080
+ ldr r6, [sp]
+ ldr lr, [sp, #4]
+
+ eor r7, r7, r12 ; ps1
+ eor r8, r8, r12 ; ps0
+ eor r9, r9, r12 ; qs0
+ eor r10, r10, r12 ; qs1
+
+ qsub8 r12, r9, r8 ; vp8_signed_char_clamp(vp8_filter + 3 * ( qs0 - ps0))
+ str r7, [sp, #12] ; store ps1 temporarily
+ qsub8 r7, r7, r10 ; vp8_signed_char_clamp(ps1-qs1)
+ str r10, [sp, #8] ; store qs1 temporarily
+ qadd8 r7, r7, r12
+ str r9, [sp] ; store qs0 temporarily
+ qadd8 r7, r7, r12
+ str r8, [sp, #4] ; store ps0 temporarily
+ qadd8 r7, r7, r12 ; vp8_filter: r7
+
+ ldr r10, c0x03030303 ; r10 = 3 --modified for vp8
+ ldr r9, c0x04040404
+ ;mvn r11, #0 ; r11 == -1
+
+ and r7, r7, lr ; vp8_filter &= mask (lr is free)
+
+ mov r12, r7 ; Filter2: r12
+ and r12, r12, r6 ; Filter2 &= hev
+
+ ;modify code for vp8
+ ;save bottom 3 bits so that we round one side +4 and the other +3
+ qadd8 r8 , r12 , r9 ; Filter1 (r8) = vp8_signed_char_clamp(Filter2+4)
+ qadd8 r12 , r12 , r10 ; Filter2 (r12) = vp8_signed_char_clamp(Filter2+3)
+
+ mov r10, #0
+ shadd8 r8 , r8 , r10 ; Filter1 >>= 3
+ shadd8 r12 , r12 , r10 ; Filter2 >>= 3
+ shadd8 r8 , r8 , r10
+ shadd8 r12 , r12 , r10
+ shadd8 r8 , r8 , r10 ; r8: Filter1
+ shadd8 r12 , r12 , r10 ; r12: Filter2
+
+ ldr r9, [sp] ; load qs0
+ ldr r11, [sp, #4] ; load ps0
+
+ qsub8 r9 , r9, r8 ; qs0 = vp8_signed_char_clamp(qs0 - Filter1)
+ qadd8 r11, r11, r12 ; ps0 = vp8_signed_char_clamp(ps0 + Filter2)
+
+ ;save bottom 3 bits so that we round one side +4 and the other +3
+ ;and r8, r12, r10 ; s = Filter2 & 7 (s: r8)
+ ;qadd8 r12 , r12 , r9 ; Filter2 = vp8_signed_char_clamp(Filter2+4)
+ ;mov r10, #0
+ ;shadd8 r12 , r12 , r10 ; Filter2 >>= 3
+ ;usub8 lr, r8, r9 ; s = (s==4)*-1
+ ;sel lr, r11, r10
+ ;shadd8 r12 , r12 , r10
+ ;usub8 r8, r9, r8
+ ;sel r8, r11, r10
+ ;ldr r9, [sp] ; load qs0
+ ;ldr r11, [sp, #4] ; load ps0
+ ;shadd8 r12 , r12 , r10
+ ;and r8, r8, lr ; -1 for each element that equals 4
+ ;qadd8 r10, r8, r12 ; u = vp8_signed_char_clamp(s + Filter2)
+ ;qsub8 r9 , r9, r12 ; qs0 = vp8_signed_char_clamp(qs0 - Filter2)
+ ;qadd8 r11, r11, r10 ; ps0 = vp8_signed_char_clamp(ps0 + u)
+
+ ;end of modification for vp8
+
+ bic r12, r7, r6 ;vp8_filter &= ~hev ( r6 is free)
+ ;mov r12, r7
+
+ ;roughly 3/7th difference across boundary
+ mov lr, #0x1b ; 27
+ mov r7, #0x3f ; 63
+
+ sxtb16 r6, r12
+ sxtb16 r10, r12, ror #8
+ smlabb r8, r6, lr, r7
+ smlatb r6, r6, lr, r7
+ smlabb r7, r10, lr, r7
+ smultb r10, r10, lr
+ ssat r8, #8, r8, asr #7
+ ssat r6, #8, r6, asr #7
+ add r10, r10, #63
+ ssat r7, #8, r7, asr #7
+ ssat r10, #8, r10, asr #7
+
+ ldr lr, c0x80808080
+
+ pkhbt r6, r8, r6, lsl #16
+ pkhbt r10, r7, r10, lsl #16
+ uxtb16 r6, r6
+ uxtb16 r10, r10
+
+ sub src, src, pstep, lsl #2 ; move src pointer down by 4 lines
+
+ orr r10, r6, r10, lsl #8 ; u = vp8_signed_char_clamp((63 + Filter2 * 27)>>7)
+
+ qsub8 r8, r9, r10 ; s = vp8_signed_char_clamp(qs0 - u)
+ qadd8 r10, r11, r10 ; s = vp8_signed_char_clamp(ps0 + u)
+ eor r8, r8, lr ; *oq0 = s^0x80
+ eor r10, r10, lr ; *op0 = s^0x80
+
+ strb r10, [src, #-1] ; store op0 result
+ strb r8, [src], pstep ; store oq0 result
+ mov r10, r10, lsr #8
+ mov r8, r8, lsr #8
+ strb r10, [src, #-1]
+ strb r8, [src], pstep
+ mov r10, r10, lsr #8
+ mov r8, r8, lsr #8
+ strb r10, [src, #-1]
+ strb r8, [src], pstep
+ mov r10, r10, lsr #8
+ mov r8, r8, lsr #8
+ strb r10, [src, #-1]
+ strb r8, [src], pstep
+
+ ;roughly 2/7th difference across boundary
+ mov lr, #0x12 ; 18
+ mov r7, #0x3f ; 63
+
+ sxtb16 r6, r12
+ sxtb16 r10, r12, ror #8
+ smlabb r8, r6, lr, r7
+ smlatb r6, r6, lr, r7
+ smlabb r9, r10, lr, r7
+
+ smlatb r10, r10, lr, r7
+ ssat r8, #8, r8, asr #7
+ ssat r6, #8, r6, asr #7
+ ssat r9, #8, r9, asr #7
+ ssat r10, #8, r10, asr #7
+
+ sub src, src, pstep, lsl #2 ; move src pointer down by 4 lines
+
+ pkhbt r6, r8, r6, lsl #16
+ pkhbt r10, r9, r10, lsl #16
+
+ ldr r9, [sp, #8] ; load qs1
+ ldr r11, [sp, #12] ; load ps1
+ ldr lr, c0x80808080
+
+ uxtb16 r6, r6
+ uxtb16 r10, r10
+
+ add src, src, #2
+
+ orr r10, r6, r10, lsl #8 ; u = vp8_signed_char_clamp((63 + Filter2 * 18)>>7)
+
+ qsub8 r8, r9, r10 ; s = vp8_signed_char_clamp(qs1 - u)
+ qadd8 r10, r11, r10 ; s = vp8_signed_char_clamp(ps1 + u)
+ eor r8, r8, lr ; *oq1 = s^0x80
+ eor r10, r10, lr ; *op1 = s^0x80
+
+ ldrb r11, [src, #-5] ; load p2 for 1/7th difference across boundary
+ strb r10, [src, #-4] ; store op1
+ strb r8, [src, #-1] ; store oq1
+ ldrb r9, [src], pstep ; load q2 for 1/7th difference across boundary
+
+ mov r10, r10, lsr #8
+ mov r8, r8, lsr #8
+
+ ldrb r6, [src, #-5]
+ strb r10, [src, #-4]
+ strb r8, [src, #-1]
+ ldrb r7, [src], pstep
+
+ mov r10, r10, lsr #8
+ mov r8, r8, lsr #8
+ orr r11, r11, r6, lsl #8
+ orr r9, r9, r7, lsl #8
+
+ ldrb r6, [src, #-5]
+ strb r10, [src, #-4]
+ strb r8, [src, #-1]
+ ldrb r7, [src], pstep
+
+ mov r10, r10, lsr #8
+ mov r8, r8, lsr #8
+ orr r11, r11, r6, lsl #16
+ orr r9, r9, r7, lsl #16
+
+ ldrb r6, [src, #-5]
+ strb r10, [src, #-4]
+ strb r8, [src, #-1]
+ ldrb r7, [src], pstep
+ orr r11, r11, r6, lsl #24
+ orr r9, r9, r7, lsl #24
+
+ ;roughly 1/7th difference across boundary
+ eor r9, r9, lr
+ eor r11, r11, lr
+
+ mov lr, #0x9 ; 9
+ mov r7, #0x3f ; 63
+
+ sxtb16 r6, r12
+ sxtb16 r10, r12, ror #8
+ smlabb r8, r6, lr, r7
+ smlatb r6, r6, lr, r7
+ smlabb r12, r10, lr, r7
+ smlatb r10, r10, lr, r7
+ ssat r8, #8, r8, asr #7
+ ssat r6, #8, r6, asr #7
+ ssat r12, #8, r12, asr #7
+ ssat r10, #8, r10, asr #7
+
+ sub src, src, pstep, lsl #2
+
+ pkhbt r6, r8, r6, lsl #16
+ pkhbt r10, r12, r10, lsl #16
+
+ uxtb16 r6, r6
+ uxtb16 r10, r10
+
+ ldr lr, c0x80808080
+
+ orr r10, r6, r10, lsl #8 ; u = vp8_signed_char_clamp((63 + Filter2 * 9)>>7)
+
+ qadd8 r8, r11, r10 ; s = vp8_signed_char_clamp(ps2 + u)
+ qsub8 r10, r9, r10 ; s = vp8_signed_char_clamp(qs2 - u)
+ eor r8, r8, lr ; *op2 = s^0x80
+ eor r10, r10, lr ; *oq2 = s^0x80
+
+ strb r8, [src, #-5] ; store *op2
+ strb r10, [src], pstep ; store *oq2
+ mov r8, r8, lsr #8
+ mov r10, r10, lsr #8
+ strb r8, [src, #-5]
+ strb r10, [src], pstep
+ mov r8, r8, lsr #8
+ mov r10, r10, lsr #8
+ strb r8, [src, #-5]
+ strb r10, [src], pstep
+ mov r8, r8, lsr #8
+ mov r10, r10, lsr #8
+ strb r8, [src, #-5]
+ strb r10, [src], pstep
+
+ ;adjust src pointer for next loop
+ sub src, src, #2
+
+|mbvskip_filter|
+ sub src, src, #4
+ subs count, count, #1
+
+ pld [src, #23] ; preload for next block
+ ldrne r6, [src], pstep ; load source data
+ pld [src, #23]
+ ldrne r7, [src], pstep
+ pld [src, #23]
+ ldrne r8, [src], pstep
+ pld [src, #23]
+ ldrne lr, [src], pstep
+
+ bne MBVnext8
+
+ add sp, sp, #16
+
+ ldmia sp!, {r4 - r11, pc}
+ ENDP ; |vp8_mbloop_filter_vertical_edge_armv6|
+
+; Constant Pool
+c0x80808080 DCD 0x80808080
+c0x03030303 DCD 0x03030303
+c0x04040404 DCD 0x04040404
+c0x01010101 DCD 0x01010101
+c0x7F7F7F7F DCD 0x7F7F7F7F
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/simpleloopfilter_v6.asm b/media/libvpx/vp8/common/arm/armv6/simpleloopfilter_v6.asm
new file mode 100644
index 000000000..5e00cf01b
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/simpleloopfilter_v6.asm
@@ -0,0 +1,286 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_loop_filter_simple_horizontal_edge_armv6|
+ EXPORT |vp8_loop_filter_simple_vertical_edge_armv6|
+
+ AREA |.text|, CODE, READONLY ; name this block of code
+
+ MACRO
+ TRANSPOSE_MATRIX $a0, $a1, $a2, $a3, $b0, $b1, $b2, $b3
+ ; input: $a0, $a1, $a2, $a3; output: $b0, $b1, $b2, $b3
+ ; a0: 03 02 01 00
+ ; a1: 13 12 11 10
+ ; a2: 23 22 21 20
+ ; a3: 33 32 31 30
+ ; b3 b2 b1 b0
+
+ uxtb16 $b1, $a1 ; xx 12 xx 10
+ uxtb16 $b0, $a0 ; xx 02 xx 00
+ uxtb16 $b3, $a3 ; xx 32 xx 30
+ uxtb16 $b2, $a2 ; xx 22 xx 20
+ orr $b1, $b0, $b1, lsl #8 ; 12 02 10 00
+ orr $b3, $b2, $b3, lsl #8 ; 32 22 30 20
+
+ uxtb16 $a1, $a1, ror #8 ; xx 13 xx 11
+ uxtb16 $a3, $a3, ror #8 ; xx 33 xx 31
+ uxtb16 $a0, $a0, ror #8 ; xx 03 xx 01
+ uxtb16 $a2, $a2, ror #8 ; xx 23 xx 21
+ orr $a0, $a0, $a1, lsl #8 ; 13 03 11 01
+ orr $a2, $a2, $a3, lsl #8 ; 33 23 31 21
+
+ pkhtb $b2, $b3, $b1, asr #16 ; 32 22 12 02 -- p1
+ pkhbt $b0, $b1, $b3, lsl #16 ; 30 20 10 00 -- p3
+
+ pkhtb $b3, $a2, $a0, asr #16 ; 33 23 13 03 -- p0
+ pkhbt $b1, $a0, $a2, lsl #16 ; 31 21 11 01 -- p2
+ MEND
+
+
+
+src RN r0
+pstep RN r1
+
+;r0 unsigned char *src_ptr,
+;r1 int src_pixel_step,
+;r2 const char *blimit
+
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+|vp8_loop_filter_simple_horizontal_edge_armv6| PROC
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+ stmdb sp!, {r4 - r11, lr}
+
+ ldrb r12, [r2] ; blimit
+ ldr r3, [src, -pstep, lsl #1] ; p1
+ ldr r4, [src, -pstep] ; p0
+ ldr r5, [src] ; q0
+ ldr r6, [src, pstep] ; q1
+ orr r12, r12, r12, lsl #8 ; blimit
+ ldr r2, c0x80808080
+ orr r12, r12, r12, lsl #16 ; blimit
+ mov r9, #4 ; double the count. we're doing 4 at a time
+ mov lr, #0 ; need 0 in a couple places
+
+|simple_hnext8|
+ ; vp8_simple_filter_mask()
+
+ uqsub8 r7, r3, r6 ; p1 - q1
+ uqsub8 r8, r6, r3 ; q1 - p1
+ uqsub8 r10, r4, r5 ; p0 - q0
+ uqsub8 r11, r5, r4 ; q0 - p0
+ orr r8, r8, r7 ; abs(p1 - q1)
+ orr r10, r10, r11 ; abs(p0 - q0)
+ uqadd8 r10, r10, r10 ; abs(p0 - q0) * 2
+ uhadd8 r8, r8, lr ; abs(p1 - q2) >> 1
+ uqadd8 r10, r10, r8 ; abs(p0 - q0)*2 + abs(p1 - q1)/2
+ mvn r8, #0
+ usub8 r10, r12, r10 ; compare to flimit. usub8 sets GE flags
+ sel r10, r8, lr ; filter mask: F or 0
+ cmp r10, #0
+ beq simple_hskip_filter ; skip filtering if all masks are 0x00
+
+ ;vp8_simple_filter()
+
+ eor r3, r3, r2 ; p1 offset to convert to a signed value
+ eor r6, r6, r2 ; q1 offset to convert to a signed value
+ eor r4, r4, r2 ; p0 offset to convert to a signed value
+ eor r5, r5, r2 ; q0 offset to convert to a signed value
+
+ qsub8 r3, r3, r6 ; vp8_filter = p1 - q1
+ qsub8 r6, r5, r4 ; q0 - p0
+ qadd8 r3, r3, r6 ; += q0 - p0
+ ldr r7, c0x04040404
+ qadd8 r3, r3, r6 ; += q0 - p0
+ ldr r8, c0x03030303
+ qadd8 r3, r3, r6 ; vp8_filter = p1-q1 + 3*(q0-p0))
+ ;STALL
+ and r3, r3, r10 ; vp8_filter &= mask
+
+ qadd8 r7 , r3 , r7 ; Filter1 = vp8_filter + 4
+ qadd8 r8 , r3 , r8 ; Filter2 = vp8_filter + 3
+
+ shadd8 r7 , r7 , lr
+ shadd8 r8 , r8 , lr
+ shadd8 r7 , r7 , lr
+ shadd8 r8 , r8 , lr
+ shadd8 r7 , r7 , lr ; Filter1 >>= 3
+ shadd8 r8 , r8 , lr ; Filter2 >>= 3
+
+ qsub8 r5 ,r5, r7 ; u = q0 - Filter1
+ qadd8 r4, r4, r8 ; u = p0 + Filter2
+ eor r5, r5, r2 ; *oq0 = u^0x80
+ str r5, [src] ; store oq0 result
+ eor r4, r4, r2 ; *op0 = u^0x80
+ str r4, [src, -pstep] ; store op0 result
+
+|simple_hskip_filter|
+ subs r9, r9, #1
+ addne src, src, #4 ; next row
+
+ ldrne r3, [src, -pstep, lsl #1] ; p1
+ ldrne r4, [src, -pstep] ; p0
+ ldrne r5, [src] ; q0
+ ldrne r6, [src, pstep] ; q1
+
+ bne simple_hnext8
+
+ ldmia sp!, {r4 - r11, pc}
+ ENDP ; |vp8_loop_filter_simple_horizontal_edge_armv6|
+
+
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+|vp8_loop_filter_simple_vertical_edge_armv6| PROC
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+ stmdb sp!, {r4 - r11, lr}
+
+ ldrb r12, [r2] ; r12: blimit
+ ldr r2, c0x80808080
+ orr r12, r12, r12, lsl #8
+
+ ; load soure data to r7, r8, r9, r10
+ ldrh r3, [src, #-2]
+ pld [src, #23] ; preload for next block
+ ldrh r4, [src], pstep
+ orr r12, r12, r12, lsl #16
+
+ ldrh r5, [src, #-2]
+ pld [src, #23]
+ ldrh r6, [src], pstep
+
+ pkhbt r7, r3, r4, lsl #16
+
+ ldrh r3, [src, #-2]
+ pld [src, #23]
+ ldrh r4, [src], pstep
+
+ pkhbt r8, r5, r6, lsl #16
+
+ ldrh r5, [src, #-2]
+ pld [src, #23]
+ ldrh r6, [src], pstep
+ mov r11, #4 ; double the count. we're doing 4 at a time
+
+|simple_vnext8|
+ ; vp8_simple_filter_mask() function
+ pkhbt r9, r3, r4, lsl #16
+ pkhbt r10, r5, r6, lsl #16
+
+ ;transpose r7, r8, r9, r10 to r3, r4, r5, r6
+ TRANSPOSE_MATRIX r7, r8, r9, r10, r3, r4, r5, r6
+
+ uqsub8 r7, r3, r6 ; p1 - q1
+ uqsub8 r8, r6, r3 ; q1 - p1
+ uqsub8 r9, r4, r5 ; p0 - q0
+ uqsub8 r10, r5, r4 ; q0 - p0
+ orr r7, r7, r8 ; abs(p1 - q1)
+ orr r9, r9, r10 ; abs(p0 - q0)
+ mov r8, #0
+ uqadd8 r9, r9, r9 ; abs(p0 - q0) * 2
+ uhadd8 r7, r7, r8 ; abs(p1 - q1) / 2
+ uqadd8 r7, r7, r9 ; abs(p0 - q0)*2 + abs(p1 - q1)/2
+ mvn r10, #0 ; r10 == -1
+
+ usub8 r7, r12, r7 ; compare to flimit
+ sel lr, r10, r8 ; filter mask
+
+ cmp lr, #0
+ beq simple_vskip_filter ; skip filtering
+
+ ;vp8_simple_filter() function
+ eor r3, r3, r2 ; p1 offset to convert to a signed value
+ eor r6, r6, r2 ; q1 offset to convert to a signed value
+ eor r4, r4, r2 ; p0 offset to convert to a signed value
+ eor r5, r5, r2 ; q0 offset to convert to a signed value
+
+ qsub8 r3, r3, r6 ; vp8_filter = p1 - q1
+ qsub8 r6, r5, r4 ; q0 - p0
+
+ qadd8 r3, r3, r6 ; vp8_filter += q0 - p0
+ ldr r9, c0x03030303 ; r9 = 3
+
+ qadd8 r3, r3, r6 ; vp8_filter += q0 - p0
+ ldr r7, c0x04040404
+
+ qadd8 r3, r3, r6 ; vp8_filter = p1-q1 + 3*(q0-p0))
+ ;STALL
+ and r3, r3, lr ; vp8_filter &= mask
+
+ qadd8 r9 , r3 , r9 ; Filter2 = vp8_filter + 3
+ qadd8 r3 , r3 , r7 ; Filter1 = vp8_filter + 4
+
+ shadd8 r9 , r9 , r8
+ shadd8 r3 , r3 , r8
+ shadd8 r9 , r9 , r8
+ shadd8 r3 , r3 , r8
+ shadd8 r9 , r9 , r8 ; Filter2 >>= 3
+ shadd8 r3 , r3 , r8 ; Filter1 >>= 3
+
+ ;calculate output
+ sub src, src, pstep, lsl #2
+
+ qadd8 r4, r4, r9 ; u = p0 + Filter2
+ qsub8 r5, r5, r3 ; u = q0 - Filter1
+ eor r4, r4, r2 ; *op0 = u^0x80
+ eor r5, r5, r2 ; *oq0 = u^0x80
+
+ strb r4, [src, #-1] ; store the result
+ mov r4, r4, lsr #8
+ strb r5, [src], pstep
+ mov r5, r5, lsr #8
+
+ strb r4, [src, #-1]
+ mov r4, r4, lsr #8
+ strb r5, [src], pstep
+ mov r5, r5, lsr #8
+
+ strb r4, [src, #-1]
+ mov r4, r4, lsr #8
+ strb r5, [src], pstep
+ mov r5, r5, lsr #8
+
+ strb r4, [src, #-1]
+ strb r5, [src], pstep
+
+|simple_vskip_filter|
+ subs r11, r11, #1
+
+ ; load soure data to r7, r8, r9, r10
+ ldrneh r3, [src, #-2]
+ pld [src, #23] ; preload for next block
+ ldrneh r4, [src], pstep
+
+ ldrneh r5, [src, #-2]
+ pld [src, #23]
+ ldrneh r6, [src], pstep
+
+ pkhbt r7, r3, r4, lsl #16
+
+ ldrneh r3, [src, #-2]
+ pld [src, #23]
+ ldrneh r4, [src], pstep
+
+ pkhbt r8, r5, r6, lsl #16
+
+ ldrneh r5, [src, #-2]
+ pld [src, #23]
+ ldrneh r6, [src], pstep
+
+ bne simple_vnext8
+
+ ldmia sp!, {r4 - r11, pc}
+ ENDP ; |vp8_loop_filter_simple_vertical_edge_armv6|
+
+; Constant Pool
+c0x80808080 DCD 0x80808080
+c0x03030303 DCD 0x03030303
+c0x04040404 DCD 0x04040404
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/sixtappredict8x4_v6.asm b/media/libvpx/vp8/common/arm/armv6/sixtappredict8x4_v6.asm
new file mode 100644
index 000000000..e81aef53d
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/sixtappredict8x4_v6.asm
@@ -0,0 +1,273 @@
+;
+; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_sixtap_predict8x4_armv6|
+
+ AREA |.text|, CODE, READONLY ; name this block of code
+;-------------------------------------
+; r0 unsigned char *src_ptr,
+; r1 int src_pixels_per_line,
+; r2 int xoffset,
+; r3 int yoffset,
+; stack unsigned char *dst_ptr,
+; stack int dst_pitch
+;-------------------------------------
+;note: In first pass, store the result in transpose(8linesx9columns) on stack. Temporary stack size is 184.
+;Line width is 20 that is 9 short data plus 2 to make it 4bytes aligned. In second pass, load data from stack,
+;and the result is stored in transpose.
+|vp8_sixtap_predict8x4_armv6| PROC
+ stmdb sp!, {r4 - r11, lr}
+ str r3, [sp, #-184]! ;reserve space on stack for temporary storage, store yoffset
+
+ cmp r2, #0 ;skip first_pass filter if xoffset=0
+ add lr, sp, #4 ;point to temporary buffer
+ beq skip_firstpass_filter
+
+;first-pass filter
+ adr r12, filter8_coeff
+ sub r0, r0, r1, lsl #1
+
+ add r3, r1, #10 ; preload next low
+ pld [r0, r3]
+
+ add r2, r12, r2, lsl #4 ;calculate filter location
+ add r0, r0, #3 ;adjust src only for loading convinience
+
+ ldr r3, [r2] ; load up packed filter coefficients
+ ldr r4, [r2, #4]
+ ldr r5, [r2, #8]
+
+ mov r2, #0x90000 ; height=9 is top part of counter
+
+ sub r1, r1, #8
+
+|first_pass_hloop_v6|
+ ldrb r6, [r0, #-5] ; load source data
+ ldrb r7, [r0, #-4]
+ ldrb r8, [r0, #-3]
+ ldrb r9, [r0, #-2]
+ ldrb r10, [r0, #-1]
+
+ orr r2, r2, #0x4 ; construct loop counter. width=8=4x2
+
+ pkhbt r6, r6, r7, lsl #16 ; r7 | r6
+ pkhbt r7, r7, r8, lsl #16 ; r8 | r7
+
+ pkhbt r8, r8, r9, lsl #16 ; r9 | r8
+ pkhbt r9, r9, r10, lsl #16 ; r10 | r9
+
+|first_pass_wloop_v6|
+ smuad r11, r6, r3 ; vp8_filter[0], vp8_filter[1]
+ smuad r12, r7, r3
+
+ ldrb r6, [r0], #1
+
+ smlad r11, r8, r4, r11 ; vp8_filter[2], vp8_filter[3]
+ ldrb r7, [r0], #1
+ smlad r12, r9, r4, r12
+
+ pkhbt r10, r10, r6, lsl #16 ; r10 | r9
+ pkhbt r6, r6, r7, lsl #16 ; r11 | r10
+ smlad r11, r10, r5, r11 ; vp8_filter[4], vp8_filter[5]
+ smlad r12, r6, r5, r12
+
+ sub r2, r2, #1
+
+ add r11, r11, #0x40 ; round_shift_and_clamp
+ tst r2, #0xff ; test loop counter
+ usat r11, #8, r11, asr #7
+ add r12, r12, #0x40
+ strh r11, [lr], #20 ; result is transposed and stored, which
+ usat r12, #8, r12, asr #7
+
+ strh r12, [lr], #20
+
+ movne r11, r6
+ movne r12, r7
+
+ movne r6, r8
+ movne r7, r9
+ movne r8, r10
+ movne r9, r11
+ movne r10, r12
+
+ bne first_pass_wloop_v6
+
+ ;;add r9, ppl, #30 ; attempt to load 2 adjacent cache lines
+ ;;IF ARCHITECTURE=6
+ ;pld [src, ppl]
+ ;;pld [src, r9]
+ ;;ENDIF
+
+ subs r2, r2, #0x10000
+
+ sub lr, lr, #158
+
+ add r0, r0, r1 ; move to next input line
+
+ add r11, r1, #18 ; preload next low. adding back block width(=8), which is subtracted earlier
+ pld [r0, r11]
+
+ bne first_pass_hloop_v6
+
+;second pass filter
+secondpass_filter
+ ldr r3, [sp], #4 ; load back yoffset
+ ldr r0, [sp, #216] ; load dst address from stack 180+36
+ ldr r1, [sp, #220] ; load dst stride from stack 180+40
+
+ cmp r3, #0
+ beq skip_secondpass_filter
+
+ adr r12, filter8_coeff
+ add lr, r12, r3, lsl #4 ;calculate filter location
+
+ mov r2, #0x00080000
+
+ ldr r3, [lr] ; load up packed filter coefficients
+ ldr r4, [lr, #4]
+ ldr r5, [lr, #8]
+
+ pkhbt r12, r4, r3 ; pack the filter differently
+ pkhbt r11, r5, r4
+
+second_pass_hloop_v6
+ ldr r6, [sp] ; load the data
+ ldr r7, [sp, #4]
+
+ orr r2, r2, #2 ; loop counter
+
+second_pass_wloop_v6
+ smuad lr, r3, r6 ; apply filter
+ smulbt r10, r3, r6
+
+ ldr r8, [sp, #8]
+
+ smlad lr, r4, r7, lr
+ smladx r10, r12, r7, r10
+
+ ldrh r9, [sp, #12]
+
+ smlad lr, r5, r8, lr
+ smladx r10, r11, r8, r10
+
+ add sp, sp, #4
+ smlatb r10, r5, r9, r10
+
+ sub r2, r2, #1
+
+ add lr, lr, #0x40 ; round_shift_and_clamp
+ tst r2, #0xff
+ usat lr, #8, lr, asr #7
+ add r10, r10, #0x40
+ strb lr, [r0], r1 ; the result is transposed back and stored
+ usat r10, #8, r10, asr #7
+
+ strb r10, [r0],r1
+
+ movne r6, r7
+ movne r7, r8
+
+ bne second_pass_wloop_v6
+
+ subs r2, r2, #0x10000
+ add sp, sp, #12 ; updata src for next loop (20-8)
+ sub r0, r0, r1, lsl #2
+ add r0, r0, #1
+
+ bne second_pass_hloop_v6
+
+ add sp, sp, #20
+ ldmia sp!, {r4 - r11, pc}
+
+;--------------------
+skip_firstpass_filter
+ sub r0, r0, r1, lsl #1
+ sub r1, r1, #8
+ mov r2, #9
+
+skip_firstpass_hloop
+ ldrb r4, [r0], #1 ; load data
+ subs r2, r2, #1
+ ldrb r5, [r0], #1
+ strh r4, [lr], #20 ; store it to immediate buffer
+ ldrb r6, [r0], #1 ; load data
+ strh r5, [lr], #20
+ ldrb r7, [r0], #1
+ strh r6, [lr], #20
+ ldrb r8, [r0], #1
+ strh r7, [lr], #20
+ ldrb r9, [r0], #1
+ strh r8, [lr], #20
+ ldrb r10, [r0], #1
+ strh r9, [lr], #20
+ ldrb r11, [r0], #1
+ strh r10, [lr], #20
+ add r0, r0, r1 ; move to next input line
+ strh r11, [lr], #20
+
+ sub lr, lr, #158 ; move over to next column
+ bne skip_firstpass_hloop
+
+ b secondpass_filter
+
+;--------------------
+skip_secondpass_filter
+ mov r2, #8
+ add sp, sp, #4 ;start from src[0] instead of src[-2]
+
+skip_secondpass_hloop
+ ldr r6, [sp], #4
+ subs r2, r2, #1
+ ldr r8, [sp], #4
+
+ mov r7, r6, lsr #16 ; unpack
+ strb r6, [r0], r1
+ mov r9, r8, lsr #16
+ strb r7, [r0], r1
+ add sp, sp, #12 ; 20-8
+ strb r8, [r0], r1
+ strb r9, [r0], r1
+
+ sub r0, r0, r1, lsl #2
+ add r0, r0, #1
+
+ bne skip_secondpass_hloop
+
+ add sp, sp, #16 ; 180 - (160 +4)
+
+ ldmia sp!, {r4 - r11, pc}
+
+ ENDP
+
+;-----------------
+;One word each is reserved. Label filter_coeff can be used to access the data.
+;Data address: filter_coeff, filter_coeff+4, filter_coeff+8 ...
+filter8_coeff
+ DCD 0x00000000, 0x00000080, 0x00000000, 0x00000000
+ DCD 0xfffa0000, 0x000c007b, 0x0000ffff, 0x00000000
+ DCD 0xfff50002, 0x0024006c, 0x0001fff8, 0x00000000
+ DCD 0xfff70000, 0x0032005d, 0x0000fffa, 0x00000000
+ DCD 0xfff00003, 0x004d004d, 0x0003fff0, 0x00000000
+ DCD 0xfffa0000, 0x005d0032, 0x0000fff7, 0x00000000
+ DCD 0xfff80001, 0x006c0024, 0x0002fff5, 0x00000000
+ DCD 0xffff0000, 0x007b000c, 0x0000fffa, 0x00000000
+
+ ;DCD 0, 0, 128, 0, 0, 0
+ ;DCD 0, -6, 123, 12, -1, 0
+ ;DCD 2, -11, 108, 36, -8, 1
+ ;DCD 0, -9, 93, 50, -6, 0
+ ;DCD 3, -16, 77, 77, -16, 3
+ ;DCD 0, -6, 50, 93, -9, 0
+ ;DCD 1, -8, 36, 108, -11, 2
+ ;DCD 0, -1, 12, 123, -6, 0
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_h_armv6.asm b/media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_h_armv6.asm
new file mode 100644
index 000000000..3668dc517
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_h_armv6.asm
@@ -0,0 +1,182 @@
+;
+; Copyright (c) 2011 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_variance_halfpixvar16x16_h_armv6|
+
+ ARM
+ REQUIRE8
+ PRESERVE8
+
+ AREA ||.text||, CODE, READONLY, ALIGN=2
+
+; r0 unsigned char *src_ptr
+; r1 int source_stride
+; r2 unsigned char *ref_ptr
+; r3 int recon_stride
+; stack unsigned int *sse
+|vp8_variance_halfpixvar16x16_h_armv6| PROC
+
+ stmfd sp!, {r4-r12, lr}
+
+ pld [r0, r1, lsl #0]
+ pld [r2, r3, lsl #0]
+
+ mov r8, #0 ; initialize sum = 0
+ ldr r10, c80808080
+ mov r11, #0 ; initialize sse = 0
+ mov r12, #16 ; set loop counter to 16 (=block height)
+ mov lr, #0 ; constant zero
+loop
+ ; 1st 4 pixels
+ ldr r4, [r0, #0] ; load 4 src pixels
+ ldr r6, [r0, #1] ; load 4 src pixels with 1 byte offset
+ ldr r5, [r2, #0] ; load 4 ref pixels
+
+ ; bilinear interpolation
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+
+ usub8 r6, r4, r5 ; calculate difference
+ pld [r0, r1, lsl #1]
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ pld [r2, r3, lsl #1]
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+ ; calculate total sum
+ adds r8, r8, r4 ; add positive differences to sum
+ subs r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+
+ ; 2nd 4 pixels
+ ldr r4, [r0, #4] ; load 4 src pixels
+ ldr r6, [r0, #5] ; load 4 src pixels with 1 byte offset
+ ldr r5, [r2, #4] ; load 4 ref pixels
+
+ ; bilinear interpolation
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r6, r4, r5 ; calculate difference
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+
+ ; calculate total sum
+ add r8, r8, r4 ; add positive differences to sum
+ sub r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+
+ ; 3rd 4 pixels
+ ldr r4, [r0, #8] ; load 4 src pixels
+ ldr r6, [r0, #9] ; load 4 src pixels with 1 byte offset
+ ldr r5, [r2, #8] ; load 4 ref pixels
+
+ ; bilinear interpolation
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r6, r4, r5 ; calculate difference
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+
+ ; calculate total sum
+ add r8, r8, r4 ; add positive differences to sum
+ sub r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+
+ ; 4th 4 pixels
+ ldr r4, [r0, #12] ; load 4 src pixels
+ ldr r6, [r0, #13] ; load 4 src pixels with 1 byte offset
+ ldr r5, [r2, #12] ; load 4 ref pixels
+
+ ; bilinear interpolation
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r6, r4, r5 ; calculate difference
+ add r0, r0, r1 ; set src_ptr to next row
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ add r2, r2, r3 ; set dst_ptr to next row
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+
+ ; calculate total sum
+ add r8, r8, r4 ; add positive differences to sum
+ sub r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+ subs r12, r12, #1
+
+ bne loop
+
+ ; return stuff
+ ldr r6, [sp, #40] ; get address of sse
+ mul r0, r8, r8 ; sum * sum
+ str r11, [r6] ; store sse
+ sub r0, r11, r0, lsr #8 ; return (sse - ((sum * sum) >> 8))
+
+ ldmfd sp!, {r4-r12, pc}
+
+ ENDP
+
+c80808080
+ DCD 0x80808080
+
+ END
+
diff --git a/media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_hv_armv6.asm b/media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_hv_armv6.asm
new file mode 100644
index 000000000..b4e0959d1
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_hv_armv6.asm
@@ -0,0 +1,222 @@
+;
+; Copyright (c) 2011 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_variance_halfpixvar16x16_hv_armv6|
+
+ ARM
+ REQUIRE8
+ PRESERVE8
+
+ AREA ||.text||, CODE, READONLY, ALIGN=2
+
+; r0 unsigned char *src_ptr
+; r1 int source_stride
+; r2 unsigned char *ref_ptr
+; r3 int recon_stride
+; stack unsigned int *sse
+|vp8_variance_halfpixvar16x16_hv_armv6| PROC
+
+ stmfd sp!, {r4-r12, lr}
+
+ pld [r0, r1, lsl #0]
+ pld [r2, r3, lsl #0]
+
+ mov r8, #0 ; initialize sum = 0
+ ldr r10, c80808080
+ mov r11, #0 ; initialize sse = 0
+ mov r12, #16 ; set loop counter to 16 (=block height)
+ mov lr, #0 ; constant zero
+loop
+ add r9, r0, r1 ; pointer to pixels on the next row
+ ; 1st 4 pixels
+ ldr r4, [r0, #0] ; load source pixels a, row N
+ ldr r6, [r0, #1] ; load source pixels b, row N
+ ldr r5, [r9, #0] ; load source pixels c, row N+1
+ ldr r7, [r9, #1] ; load source pixels d, row N+1
+
+ ; x = (a + b + 1) >> 1, interpolate pixels horizontally on row N
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+ ; y = (c + d + 1) >> 1, interpolate pixels horizontally on row N+1
+ mvn r7, r7
+ uhsub8 r5, r5, r7
+ eor r5, r5, r10
+ ; z = (x + y + 1) >> 1, interpolate half pixel values vertically
+ mvn r5, r5
+ uhsub8 r4, r4, r5
+ ldr r5, [r2, #0] ; load 4 ref pixels
+ eor r4, r4, r10
+
+ usub8 r6, r4, r5 ; calculate difference
+ pld [r0, r1, lsl #1]
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ pld [r2, r3, lsl #1]
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+ ; calculate total sum
+ adds r8, r8, r4 ; add positive differences to sum
+ subs r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+
+ ; 2nd 4 pixels
+ ldr r4, [r0, #4] ; load source pixels a, row N
+ ldr r6, [r0, #5] ; load source pixels b, row N
+ ldr r5, [r9, #4] ; load source pixels c, row N+1
+
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+ ldr r7, [r9, #5] ; load source pixels d, row N+1
+
+ ; x = (a + b + 1) >> 1, interpolate pixels horizontally on row N
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+ ; y = (c + d + 1) >> 1, interpolate pixels horizontally on row N+1
+ mvn r7, r7
+ uhsub8 r5, r5, r7
+ eor r5, r5, r10
+ ; z = (x + y + 1) >> 1, interpolate half pixel values vertically
+ mvn r5, r5
+ uhsub8 r4, r4, r5
+ ldr r5, [r2, #4] ; load 4 ref pixels
+ eor r4, r4, r10
+
+ usub8 r6, r4, r5 ; calculate difference
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+
+ ; calculate total sum
+ add r8, r8, r4 ; add positive differences to sum
+ sub r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+
+ ; 3rd 4 pixels
+ ldr r4, [r0, #8] ; load source pixels a, row N
+ ldr r6, [r0, #9] ; load source pixels b, row N
+ ldr r5, [r9, #8] ; load source pixels c, row N+1
+
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+ ldr r7, [r9, #9] ; load source pixels d, row N+1
+
+ ; x = (a + b + 1) >> 1, interpolate pixels horizontally on row N
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+ ; y = (c + d + 1) >> 1, interpolate pixels horizontally on row N+1
+ mvn r7, r7
+ uhsub8 r5, r5, r7
+ eor r5, r5, r10
+ ; z = (x + y + 1) >> 1, interpolate half pixel values vertically
+ mvn r5, r5
+ uhsub8 r4, r4, r5
+ ldr r5, [r2, #8] ; load 4 ref pixels
+ eor r4, r4, r10
+
+ usub8 r6, r4, r5 ; calculate difference
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+
+ ; calculate total sum
+ add r8, r8, r4 ; add positive differences to sum
+ sub r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+
+ ; 4th 4 pixels
+ ldr r4, [r0, #12] ; load source pixels a, row N
+ ldr r6, [r0, #13] ; load source pixels b, row N
+ ldr r5, [r9, #12] ; load source pixels c, row N+1
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+ ldr r7, [r9, #13] ; load source pixels d, row N+1
+
+ ; x = (a + b + 1) >> 1, interpolate pixels horizontally on row N
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+ ; y = (c + d + 1) >> 1, interpolate pixels horizontally on row N+1
+ mvn r7, r7
+ uhsub8 r5, r5, r7
+ eor r5, r5, r10
+ ; z = (x + y + 1) >> 1, interpolate half pixel values vertically
+ mvn r5, r5
+ uhsub8 r4, r4, r5
+ ldr r5, [r2, #12] ; load 4 ref pixels
+ eor r4, r4, r10
+
+ usub8 r6, r4, r5 ; calculate difference
+ add r0, r0, r1 ; set src_ptr to next row
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ add r2, r2, r3 ; set dst_ptr to next row
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+
+ ; calculate total sum
+ add r8, r8, r4 ; add positive differences to sum
+ sub r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+ subs r12, r12, #1
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+ bne loop
+
+ ; return stuff
+ ldr r6, [sp, #40] ; get address of sse
+ mul r0, r8, r8 ; sum * sum
+ str r11, [r6] ; store sse
+ sub r0, r11, r0, lsr #8 ; return (sse - ((sum * sum) >> 8))
+
+ ldmfd sp!, {r4-r12, pc}
+
+ ENDP
+
+c80808080
+ DCD 0x80808080
+
+ END
diff --git a/media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_v_armv6.asm b/media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_v_armv6.asm
new file mode 100644
index 000000000..10863e2ec
--- /dev/null
+++ b/media/libvpx/vp8/common/arm/armv6/vp8_variance_halfpixvar16x16_v_armv6.asm
@@ -0,0 +1,184 @@
+;
+; Copyright (c) 2011 The WebM project authors. All Rights Reserved.
+;
+; Use of this source code is governed by a BSD-style license
+; that can be found in the LICENSE file in the root of the source
+; tree. An additional intellectual property rights grant can be found
+; in the file PATENTS. All contributing project authors may
+; be found in the AUTHORS file in the root of the source tree.
+;
+
+
+ EXPORT |vp8_variance_halfpixvar16x16_v_armv6|
+
+ ARM
+ REQUIRE8
+ PRESERVE8
+
+ AREA ||.text||, CODE, READONLY, ALIGN=2
+
+; r0 unsigned char *src_ptr
+; r1 int source_stride
+; r2 unsigned char *ref_ptr
+; r3 int recon_stride
+; stack unsigned int *sse
+|vp8_variance_halfpixvar16x16_v_armv6| PROC
+
+ stmfd sp!, {r4-r12, lr}
+
+ pld [r0, r1, lsl #0]
+ pld [r2, r3, lsl #0]
+
+ mov r8, #0 ; initialize sum = 0
+ ldr r10, c80808080
+ mov r11, #0 ; initialize sse = 0
+ mov r12, #16 ; set loop counter to 16 (=block height)
+ mov lr, #0 ; constant zero
+loop
+ add r9, r0, r1 ; set src pointer to next row
+ ; 1st 4 pixels
+ ldr r4, [r0, #0] ; load 4 src pixels
+ ldr r6, [r9, #0] ; load 4 src pixels from next row
+ ldr r5, [r2, #0] ; load 4 ref pixels
+
+ ; bilinear interpolation
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+
+ usub8 r6, r4, r5 ; calculate difference
+ pld [r0, r1, lsl #1]
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ pld [r2, r3, lsl #1]
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+ ; calculate total sum
+ adds r8, r8, r4 ; add positive differences to sum
+ subs r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+
+ ; 2nd 4 pixels
+ ldr r4, [r0, #4] ; load 4 src pixels
+ ldr r6, [r9, #4] ; load 4 src pixels from next row
+ ldr r5, [r2, #4] ; load 4 ref pixels
+
+ ; bilinear interpolation
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r6, r4, r5 ; calculate difference
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+
+ ; calculate total sum
+ add r8, r8, r4 ; add positive differences to sum
+ sub r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+
+ ; 3rd 4 pixels
+ ldr r4, [r0, #8] ; load 4 src pixels
+ ldr r6, [r9, #8] ; load 4 src pixels from next row
+ ldr r5, [r2, #8] ; load 4 ref pixels
+
+ ; bilinear interpolation
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r6, r4, r5 ; calculate difference
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+
+ ; calculate total sum
+ add r8, r8, r4 ; add positive differences to sum
+ sub r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+
+ ; 4th 4 pixels
+ ldr r4, [r0, #12] ; load 4 src pixels
+ ldr r6, [r9, #12] ; load 4 src pixels from next row
+ ldr r5, [r2, #12] ; load 4 ref pixels
+
+ ; bilinear interpolation
+ mvn r6, r6
+ uhsub8 r4, r4, r6
+ eor r4, r4, r10
+
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r6, r4, r5 ; calculate difference
+ add r0, r0, r1 ; set src_ptr to next row
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r6, r5, r4 ; calculate difference with reversed operands
+ add r2, r2, r3 ; set dst_ptr to next row
+ sel r6, r6, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r4, r7, lr ; calculate sum of positive differences
+ usad8 r5, r6, lr ; calculate sum of negative differences
+ orr r6, r6, r7 ; differences of all 4 pixels
+
+ ; calculate total sum
+ add r8, r8, r4 ; add positive differences to sum
+ sub r8, r8, r5 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r5, r6 ; byte (two pixels) to halfwords
+ uxtb16 r7, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+ smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2)
+
+
+ subs r12, r12, #1
+
+ bne loop
+
+ ; return stuff
+ ldr r6, [sp, #40] ; get address of sse
+ mul r0, r8, r8 ; sum * sum
+ str r11, [r6] ; store sse
+ sub r0, r11, r0, lsr #8 ; return (sse - ((sum * sum) >> 8))
+
+ ldmfd sp!, {r4-r12, pc}
+
+ ENDP
+
+c80808080
+ DCD 0x80808080
+
+ END
+