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-rw-r--r--media/libvpx/vp8/common/arm/armv6/filter_v6.asm624
1 files changed, 624 insertions, 0 deletions
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
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