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-rw-r--r--media/libvpx/vp8/common/arm/armv6/bilinearfilter_v6.asm237
1 files changed, 237 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
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