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Unified Diff: source/libvpx/vpx_dsp/arm/variance_media.asm

Issue 1162573005: libvpx: Pull from upstream (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/libvpx.git@master
Patch Set: Created 5 years, 7 months ago
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Index: source/libvpx/vpx_dsp/arm/variance_media.asm
diff --git a/source/libvpx/vpx_dsp/arm/variance_media.asm b/source/libvpx/vpx_dsp/arm/variance_media.asm
new file mode 100644
index 0000000000000000000000000000000000000000..f7f9e14b0a79935d96beeb3016b9237b4c5a2b9f
--- /dev/null
+++ b/source/libvpx/vpx_dsp/arm/variance_media.asm
@@ -0,0 +1,358 @@
+;
+; 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 |vpx_variance16x16_media|
+ EXPORT |vpx_variance8x8_media|
+ EXPORT |vpx_mse16x16_media|
+
+ 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
+|vpx_variance16x16_media| PROC
+
+ stmfd sp!, {r4-r12, lr}
+
+ pld [r0, r1, lsl #0]
+ pld [r2, r3, lsl #0]
+
+ mov r8, #0 ; initialize sum = 0
+ mov r11, #0 ; initialize sse = 0
+ mov r12, #16 ; set loop counter to 16 (=block height)
+
+loop16x16
+ ; 1st 4 pixels
+ ldr r4, [r0, #0] ; load 4 src pixels
+ ldr r5, [r2, #0] ; load 4 ref pixels
+
+ mov lr, #0 ; constant zero
+
+ usub8 r6, r4, r5 ; calculate difference
+ pld [r0, r1, lsl #1]
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r9, r5, r4 ; calculate difference with reversed operands
+ pld [r2, r3, lsl #1]
+ sel r6, r9, 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 r10, 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 r5, [r2, #4] ; load 4 ref pixels
+ smlad r11, r10, r10, r11 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r6, r4, r5 ; calculate difference
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r9, r5, r4 ; calculate difference with reversed operands
+ sel r6, r9, 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 r10, 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 r5, [r2, #8] ; load 4 ref pixels
+ smlad r11, r10, r10, r11 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r6, r4, r5 ; calculate difference
+ sel r7, r6, lr ; select bytes with positive difference
+ usub8 r9, r5, r4 ; calculate difference with reversed operands
+ sel r6, r9, 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 r10, 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 r5, [r2, #12] ; load 4 ref pixels
+ smlad r11, r10, r10, 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 r9, r5, r4 ; calculate difference with reversed operands
+ add r2, r2, r3 ; set dst_ptr to next row
+ sel r6, r9, 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 r10, r6, ror #8 ; another two pixels to halfwords
+ smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1)
+ smlad r11, r10, r10, r11 ; dual signed multiply, add and accumulate (2)
+
+
+ subs r12, r12, #1
+
+ bne loop16x16
+
+ ; 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
+
+; r0 unsigned char *src_ptr
+; r1 int source_stride
+; r2 unsigned char *ref_ptr
+; r3 int recon_stride
+; stack unsigned int *sse
+|vpx_variance8x8_media| PROC
+
+ push {r4-r10, lr}
+
+ pld [r0, r1, lsl #0]
+ pld [r2, r3, lsl #0]
+
+ mov r12, #8 ; set loop counter to 8 (=block height)
+ mov r4, #0 ; initialize sum = 0
+ mov r5, #0 ; initialize sse = 0
+
+loop8x8
+ ; 1st 4 pixels
+ ldr r6, [r0, #0x0] ; load 4 src pixels
+ ldr r7, [r2, #0x0] ; load 4 ref pixels
+
+ mov lr, #0 ; constant zero
+
+ usub8 r8, r6, r7 ; calculate difference
+ pld [r0, r1, lsl #1]
+ sel r10, r8, lr ; select bytes with positive difference
+ usub8 r9, r7, r6 ; calculate difference with reversed operands
+ pld [r2, r3, lsl #1]
+ sel r8, r9, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r6, r10, lr ; calculate sum of positive differences
+ usad8 r7, r8, lr ; calculate sum of negative differences
+ orr r8, r8, r10 ; differences of all 4 pixels
+ ; calculate total sum
+ add r4, r4, r6 ; add positive differences to sum
+ sub r4, r4, r7 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r7, r8 ; byte (two pixels) to halfwords
+ uxtb16 r10, r8, ror #8 ; another two pixels to halfwords
+ smlad r5, r7, r7, r5 ; dual signed multiply, add and accumulate (1)
+
+ ; 2nd 4 pixels
+ ldr r6, [r0, #0x4] ; load 4 src pixels
+ ldr r7, [r2, #0x4] ; load 4 ref pixels
+ smlad r5, r10, r10, r5 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r8, r6, r7 ; calculate difference
+ add r0, r0, r1 ; set src_ptr to next row
+ sel r10, r8, lr ; select bytes with positive difference
+ usub8 r9, r7, r6 ; calculate difference with reversed operands
+ add r2, r2, r3 ; set dst_ptr to next row
+ sel r8, r9, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r6, r10, lr ; calculate sum of positive differences
+ usad8 r7, r8, lr ; calculate sum of negative differences
+ orr r8, r8, r10 ; differences of all 4 pixels
+
+ ; calculate total sum
+ add r4, r4, r6 ; add positive differences to sum
+ sub r4, r4, r7 ; subtract negative differences from sum
+
+ ; calculate sse
+ uxtb16 r7, r8 ; byte (two pixels) to halfwords
+ uxtb16 r10, r8, ror #8 ; another two pixels to halfwords
+ smlad r5, r7, r7, r5 ; dual signed multiply, add and accumulate (1)
+ subs r12, r12, #1 ; next row
+ smlad r5, r10, r10, r5 ; dual signed multiply, add and accumulate (2)
+
+ bne loop8x8
+
+ ; return stuff
+ ldr r8, [sp, #32] ; get address of sse
+ mul r1, r4, r4 ; sum * sum
+ str r5, [r8] ; store sse
+ sub r0, r5, r1, ASR #6 ; return (sse - ((sum * sum) >> 6))
+
+ pop {r4-r10, pc}
+
+ ENDP
+
+; r0 unsigned char *src_ptr
+; r1 int source_stride
+; r2 unsigned char *ref_ptr
+; r3 int recon_stride
+; stack unsigned int *sse
+;
+;note: Based on vpx_variance16x16_media. In this function, sum is never used.
+; So, we can remove this part of calculation.
+
+|vpx_mse16x16_media| PROC
+
+ push {r4-r9, lr}
+
+ pld [r0, r1, lsl #0]
+ pld [r2, r3, lsl #0]
+
+ mov r12, #16 ; set loop counter to 16 (=block height)
+ mov r4, #0 ; initialize sse = 0
+
+loopmse
+ ; 1st 4 pixels
+ ldr r5, [r0, #0x0] ; load 4 src pixels
+ ldr r6, [r2, #0x0] ; load 4 ref pixels
+
+ mov lr, #0 ; constant zero
+
+ usub8 r8, r5, r6 ; calculate difference
+ pld [r0, r1, lsl #1]
+ sel r7, r8, lr ; select bytes with positive difference
+ usub8 r9, r6, r5 ; calculate difference with reversed operands
+ pld [r2, r3, lsl #1]
+ sel r8, r9, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r5, r7, lr ; calculate sum of positive differences
+ usad8 r6, r8, lr ; calculate sum of negative differences
+ orr r8, r8, r7 ; differences of all 4 pixels
+
+ ldr r5, [r0, #0x4] ; load 4 src pixels
+
+ ; calculate sse
+ uxtb16 r6, r8 ; byte (two pixels) to halfwords
+ uxtb16 r7, r8, ror #8 ; another two pixels to halfwords
+ smlad r4, r6, r6, r4 ; dual signed multiply, add and accumulate (1)
+
+ ; 2nd 4 pixels
+ ldr r6, [r2, #0x4] ; load 4 ref pixels
+ smlad r4, r7, r7, r4 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r8, r5, r6 ; calculate difference
+ sel r7, r8, lr ; select bytes with positive difference
+ usub8 r9, r6, r5 ; calculate difference with reversed operands
+ sel r8, r9, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r5, r7, lr ; calculate sum of positive differences
+ usad8 r6, r8, lr ; calculate sum of negative differences
+ orr r8, r8, r7 ; differences of all 4 pixels
+ ldr r5, [r0, #0x8] ; load 4 src pixels
+ ; calculate sse
+ uxtb16 r6, r8 ; byte (two pixels) to halfwords
+ uxtb16 r7, r8, ror #8 ; another two pixels to halfwords
+ smlad r4, r6, r6, r4 ; dual signed multiply, add and accumulate (1)
+
+ ; 3rd 4 pixels
+ ldr r6, [r2, #0x8] ; load 4 ref pixels
+ smlad r4, r7, r7, r4 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r8, r5, r6 ; calculate difference
+ sel r7, r8, lr ; select bytes with positive difference
+ usub8 r9, r6, r5 ; calculate difference with reversed operands
+ sel r8, r9, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r5, r7, lr ; calculate sum of positive differences
+ usad8 r6, r8, lr ; calculate sum of negative differences
+ orr r8, r8, r7 ; differences of all 4 pixels
+
+ ldr r5, [r0, #0xc] ; load 4 src pixels
+
+ ; calculate sse
+ uxtb16 r6, r8 ; byte (two pixels) to halfwords
+ uxtb16 r7, r8, ror #8 ; another two pixels to halfwords
+ smlad r4, r6, r6, r4 ; dual signed multiply, add and accumulate (1)
+
+ ; 4th 4 pixels
+ ldr r6, [r2, #0xc] ; load 4 ref pixels
+ smlad r4, r7, r7, r4 ; dual signed multiply, add and accumulate (2)
+
+ usub8 r8, r5, r6 ; calculate difference
+ add r0, r0, r1 ; set src_ptr to next row
+ sel r7, r8, lr ; select bytes with positive difference
+ usub8 r9, r6, r5 ; calculate difference with reversed operands
+ add r2, r2, r3 ; set dst_ptr to next row
+ sel r8, r9, lr ; select bytes with negative difference
+
+ ; calculate partial sums
+ usad8 r5, r7, lr ; calculate sum of positive differences
+ usad8 r6, r8, lr ; calculate sum of negative differences
+ orr r8, r8, r7 ; differences of all 4 pixels
+
+ subs r12, r12, #1 ; next row
+
+ ; calculate sse
+ uxtb16 r6, r8 ; byte (two pixels) to halfwords
+ uxtb16 r7, r8, ror #8 ; another two pixels to halfwords
+ smlad r4, r6, r6, r4 ; dual signed multiply, add and accumulate (1)
+ smlad r4, r7, r7, r4 ; dual signed multiply, add and accumulate (2)
+
+ bne loopmse
+
+ ; return stuff
+ ldr r1, [sp, #28] ; get address of sse
+ mov r0, r4 ; return sse
+ str r4, [r1] ; store sse
+
+ pop {r4-r9, pc}
+
+ ENDP
+
+ END
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