1233d2500723e5594f3e7c70896ffeeef32b9c950ywan; 2233d2500723e5594f3e7c70896ffeeef32b9c950ywan; Copyright (c) 2011 The WebM project authors. All Rights Reserved. 3233d2500723e5594f3e7c70896ffeeef32b9c950ywan; 4233d2500723e5594f3e7c70896ffeeef32b9c950ywan; Use of this source code is governed by a BSD-style license 5233d2500723e5594f3e7c70896ffeeef32b9c950ywan; that can be found in the LICENSE file in the root of the source 6233d2500723e5594f3e7c70896ffeeef32b9c950ywan; tree. An additional intellectual property rights grant can be found 7233d2500723e5594f3e7c70896ffeeef32b9c950ywan; in the file PATENTS. All contributing project authors may 8233d2500723e5594f3e7c70896ffeeef32b9c950ywan; be found in the AUTHORS file in the root of the source tree. 9233d2500723e5594f3e7c70896ffeeef32b9c950ywan; 10233d2500723e5594f3e7c70896ffeeef32b9c950ywan 11233d2500723e5594f3e7c70896ffeeef32b9c950ywan 12233d2500723e5594f3e7c70896ffeeef32b9c950ywan EXPORT |vp8_mse16x16_armv6| 13233d2500723e5594f3e7c70896ffeeef32b9c950ywan 14233d2500723e5594f3e7c70896ffeeef32b9c950ywan ARM 15233d2500723e5594f3e7c70896ffeeef32b9c950ywan 16233d2500723e5594f3e7c70896ffeeef32b9c950ywan AREA ||.text||, CODE, READONLY, ALIGN=2 17233d2500723e5594f3e7c70896ffeeef32b9c950ywan 18233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r0 unsigned char *src_ptr 19233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r1 int source_stride 20233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r2 unsigned char *ref_ptr 21233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r3 int recon_stride 22233d2500723e5594f3e7c70896ffeeef32b9c950ywan; stack unsigned int *sse 23233d2500723e5594f3e7c70896ffeeef32b9c950ywan; 24233d2500723e5594f3e7c70896ffeeef32b9c950ywan;note: Based on vp8_variance16x16_armv6. In this function, sum is never used. 25233d2500723e5594f3e7c70896ffeeef32b9c950ywan; So, we can remove this part of calculation. 26233d2500723e5594f3e7c70896ffeeef32b9c950ywan 27233d2500723e5594f3e7c70896ffeeef32b9c950ywan|vp8_mse16x16_armv6| PROC 28233d2500723e5594f3e7c70896ffeeef32b9c950ywan 29233d2500723e5594f3e7c70896ffeeef32b9c950ywan push {r4-r9, lr} 30233d2500723e5594f3e7c70896ffeeef32b9c950ywan 31233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r0, r1, lsl #0] 32233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r2, r3, lsl #0] 33233d2500723e5594f3e7c70896ffeeef32b9c950ywan 34233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov r12, #16 ; set loop counter to 16 (=block height) 35233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov r4, #0 ; initialize sse = 0 36233d2500723e5594f3e7c70896ffeeef32b9c950ywan 37233d2500723e5594f3e7c70896ffeeef32b9c950ywanloop 38233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; 1st 4 pixels 39233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r5, [r0, #0x0] ; load 4 src pixels 40233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [r2, #0x0] ; load 4 ref pixels 41233d2500723e5594f3e7c70896ffeeef32b9c950ywan 42233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov lr, #0 ; constant zero 43233d2500723e5594f3e7c70896ffeeef32b9c950ywan 44233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r8, r5, r6 ; calculate difference 45233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r0, r1, lsl #1] 46233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r7, r8, lr ; select bytes with positive difference 47233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r9, r6, r5 ; calculate difference with reversed operands 48233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r2, r3, lsl #1] 49233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r8, r9, lr ; select bytes with negative difference 50233d2500723e5594f3e7c70896ffeeef32b9c950ywan 51233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate partial sums 52233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r5, r7, lr ; calculate sum of positive differences 53233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r6, r8, lr ; calculate sum of negative differences 54233d2500723e5594f3e7c70896ffeeef32b9c950ywan orr r8, r8, r7 ; differences of all 4 pixels 55233d2500723e5594f3e7c70896ffeeef32b9c950ywan 56233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r5, [r0, #0x4] ; load 4 src pixels 57233d2500723e5594f3e7c70896ffeeef32b9c950ywan 58233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate sse 59233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r6, r8 ; byte (two pixels) to halfwords 60233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r7, r8, ror #8 ; another two pixels to halfwords 61233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r4, r6, r6, r4 ; dual signed multiply, add and accumulate (1) 62233d2500723e5594f3e7c70896ffeeef32b9c950ywan 63233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; 2nd 4 pixels 64233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [r2, #0x4] ; load 4 ref pixels 65233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r4, r7, r7, r4 ; dual signed multiply, add and accumulate (2) 66233d2500723e5594f3e7c70896ffeeef32b9c950ywan 67233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r8, r5, r6 ; calculate difference 68233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r7, r8, lr ; select bytes with positive difference 69233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r9, r6, r5 ; calculate difference with reversed operands 70233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r8, r9, lr ; select bytes with negative difference 71233d2500723e5594f3e7c70896ffeeef32b9c950ywan 72233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate partial sums 73233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r5, r7, lr ; calculate sum of positive differences 74233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r6, r8, lr ; calculate sum of negative differences 75233d2500723e5594f3e7c70896ffeeef32b9c950ywan orr r8, r8, r7 ; differences of all 4 pixels 76233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r5, [r0, #0x8] ; load 4 src pixels 77233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate sse 78233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r6, r8 ; byte (two pixels) to halfwords 79233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r7, r8, ror #8 ; another two pixels to halfwords 80233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r4, r6, r6, r4 ; dual signed multiply, add and accumulate (1) 81233d2500723e5594f3e7c70896ffeeef32b9c950ywan 82233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; 3rd 4 pixels 83233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [r2, #0x8] ; load 4 ref pixels 84233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r4, r7, r7, r4 ; dual signed multiply, add and accumulate (2) 85233d2500723e5594f3e7c70896ffeeef32b9c950ywan 86233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r8, r5, r6 ; calculate difference 87233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r7, r8, lr ; select bytes with positive difference 88233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r9, r6, r5 ; calculate difference with reversed operands 89233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r8, r9, lr ; select bytes with negative difference 90233d2500723e5594f3e7c70896ffeeef32b9c950ywan 91233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate partial sums 92233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r5, r7, lr ; calculate sum of positive differences 93233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r6, r8, lr ; calculate sum of negative differences 94233d2500723e5594f3e7c70896ffeeef32b9c950ywan orr r8, r8, r7 ; differences of all 4 pixels 95233d2500723e5594f3e7c70896ffeeef32b9c950ywan 96233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r5, [r0, #0xc] ; load 4 src pixels 97233d2500723e5594f3e7c70896ffeeef32b9c950ywan 98233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate sse 99233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r6, r8 ; byte (two pixels) to halfwords 100233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r7, r8, ror #8 ; another two pixels to halfwords 101233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r4, r6, r6, r4 ; dual signed multiply, add and accumulate (1) 102233d2500723e5594f3e7c70896ffeeef32b9c950ywan 103233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; 4th 4 pixels 104233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [r2, #0xc] ; load 4 ref pixels 105233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r4, r7, r7, r4 ; dual signed multiply, add and accumulate (2) 106233d2500723e5594f3e7c70896ffeeef32b9c950ywan 107233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r8, r5, r6 ; calculate difference 108233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r0, r0, r1 ; set src_ptr to next row 109233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r7, r8, lr ; select bytes with positive difference 110233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r9, r6, r5 ; calculate difference with reversed operands 111233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r2, r2, r3 ; set dst_ptr to next row 112233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r8, r9, lr ; select bytes with negative difference 113233d2500723e5594f3e7c70896ffeeef32b9c950ywan 114233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate partial sums 115233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r5, r7, lr ; calculate sum of positive differences 116233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r6, r8, lr ; calculate sum of negative differences 117233d2500723e5594f3e7c70896ffeeef32b9c950ywan orr r8, r8, r7 ; differences of all 4 pixels 118233d2500723e5594f3e7c70896ffeeef32b9c950ywan 119233d2500723e5594f3e7c70896ffeeef32b9c950ywan subs r12, r12, #1 ; next row 120233d2500723e5594f3e7c70896ffeeef32b9c950ywan 121233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate sse 122233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r6, r8 ; byte (two pixels) to halfwords 123233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r7, r8, ror #8 ; another two pixels to halfwords 124233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r4, r6, r6, r4 ; dual signed multiply, add and accumulate (1) 125233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r4, r7, r7, r4 ; dual signed multiply, add and accumulate (2) 126233d2500723e5594f3e7c70896ffeeef32b9c950ywan 127233d2500723e5594f3e7c70896ffeeef32b9c950ywan bne loop 128233d2500723e5594f3e7c70896ffeeef32b9c950ywan 129233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; return stuff 130233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r1, [sp, #28] ; get address of sse 131233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov r0, r4 ; return sse 132233d2500723e5594f3e7c70896ffeeef32b9c950ywan str r4, [r1] ; store sse 133233d2500723e5594f3e7c70896ffeeef32b9c950ywan 134233d2500723e5594f3e7c70896ffeeef32b9c950ywan pop {r4-r9, pc} 135233d2500723e5594f3e7c70896ffeeef32b9c950ywan 136233d2500723e5594f3e7c70896ffeeef32b9c950ywan ENDP 137233d2500723e5594f3e7c70896ffeeef32b9c950ywan 138233d2500723e5594f3e7c70896ffeeef32b9c950ywan END 139