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_variance_halfpixvar16x16_h_armv6| 13233d2500723e5594f3e7c70896ffeeef32b9c950ywan 14233d2500723e5594f3e7c70896ffeeef32b9c950ywan ARM 15233d2500723e5594f3e7c70896ffeeef32b9c950ywan REQUIRE8 16233d2500723e5594f3e7c70896ffeeef32b9c950ywan PRESERVE8 17233d2500723e5594f3e7c70896ffeeef32b9c950ywan 18233d2500723e5594f3e7c70896ffeeef32b9c950ywan AREA ||.text||, CODE, READONLY, ALIGN=2 19233d2500723e5594f3e7c70896ffeeef32b9c950ywan 20233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r0 unsigned char *src_ptr 21233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r1 int source_stride 22233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r2 unsigned char *ref_ptr 23233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r3 int recon_stride 24233d2500723e5594f3e7c70896ffeeef32b9c950ywan; stack unsigned int *sse 25233d2500723e5594f3e7c70896ffeeef32b9c950ywan|vp8_variance_halfpixvar16x16_h_armv6| PROC 26233d2500723e5594f3e7c70896ffeeef32b9c950ywan 27233d2500723e5594f3e7c70896ffeeef32b9c950ywan stmfd sp!, {r4-r12, lr} 28233d2500723e5594f3e7c70896ffeeef32b9c950ywan 29233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r0, r1, lsl #0] 30233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r2, r3, lsl #0] 31233d2500723e5594f3e7c70896ffeeef32b9c950ywan 32233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov r8, #0 ; initialize sum = 0 33233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r10, c80808080 34233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov r11, #0 ; initialize sse = 0 35233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov r12, #16 ; set loop counter to 16 (=block height) 36233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov lr, #0 ; constant zero 37233d2500723e5594f3e7c70896ffeeef32b9c950ywanloop 38233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; 1st 4 pixels 39233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r4, [r0, #0] ; load 4 src pixels 40233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [r0, #1] ; load 4 src pixels with 1 byte offset 41233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r5, [r2, #0] ; load 4 ref pixels 42233d2500723e5594f3e7c70896ffeeef32b9c950ywan 43233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; bilinear interpolation 44233d2500723e5594f3e7c70896ffeeef32b9c950ywan mvn r6, r6 45233d2500723e5594f3e7c70896ffeeef32b9c950ywan uhsub8 r4, r4, r6 46233d2500723e5594f3e7c70896ffeeef32b9c950ywan eor r4, r4, r10 47233d2500723e5594f3e7c70896ffeeef32b9c950ywan 48233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r6, r4, r5 ; calculate difference 49233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r0, r1, lsl #1] 50233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r7, r6, lr ; select bytes with positive difference 51233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r6, r5, r4 ; calculate difference with reversed operands 52233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r2, r3, lsl #1] 53233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r6, r6, lr ; select bytes with negative difference 54233d2500723e5594f3e7c70896ffeeef32b9c950ywan 55233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate partial sums 56233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r4, r7, lr ; calculate sum of positive differences 57233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r5, r6, lr ; calculate sum of negative differences 58233d2500723e5594f3e7c70896ffeeef32b9c950ywan orr r6, r6, r7 ; differences of all 4 pixels 59233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate total sum 60233d2500723e5594f3e7c70896ffeeef32b9c950ywan adds r8, r8, r4 ; add positive differences to sum 61233d2500723e5594f3e7c70896ffeeef32b9c950ywan subs r8, r8, r5 ; subtract negative differences from sum 62233d2500723e5594f3e7c70896ffeeef32b9c950ywan 63233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate sse 64233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r5, r6 ; byte (two pixels) to halfwords 65233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r7, r6, ror #8 ; another two pixels to halfwords 66233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1) 67233d2500723e5594f3e7c70896ffeeef32b9c950ywan 68233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; 2nd 4 pixels 69233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r4, [r0, #4] ; load 4 src pixels 70233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [r0, #5] ; load 4 src pixels with 1 byte offset 71233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r5, [r2, #4] ; load 4 ref pixels 72233d2500723e5594f3e7c70896ffeeef32b9c950ywan 73233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; bilinear interpolation 74233d2500723e5594f3e7c70896ffeeef32b9c950ywan mvn r6, r6 75233d2500723e5594f3e7c70896ffeeef32b9c950ywan uhsub8 r4, r4, r6 76233d2500723e5594f3e7c70896ffeeef32b9c950ywan eor r4, r4, r10 77233d2500723e5594f3e7c70896ffeeef32b9c950ywan 78233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2) 79233d2500723e5594f3e7c70896ffeeef32b9c950ywan 80233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r6, r4, r5 ; calculate difference 81233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r7, r6, lr ; select bytes with positive difference 82233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r6, r5, r4 ; calculate difference with reversed operands 83233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r6, r6, lr ; select bytes with negative difference 84233d2500723e5594f3e7c70896ffeeef32b9c950ywan 85233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate partial sums 86233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r4, r7, lr ; calculate sum of positive differences 87233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r5, r6, lr ; calculate sum of negative differences 88233d2500723e5594f3e7c70896ffeeef32b9c950ywan orr r6, r6, r7 ; differences of all 4 pixels 89233d2500723e5594f3e7c70896ffeeef32b9c950ywan 90233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate total sum 91233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r8, r8, r4 ; add positive differences to sum 92233d2500723e5594f3e7c70896ffeeef32b9c950ywan sub r8, r8, r5 ; subtract negative differences from sum 93233d2500723e5594f3e7c70896ffeeef32b9c950ywan 94233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate sse 95233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r5, r6 ; byte (two pixels) to halfwords 96233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r7, r6, ror #8 ; another two pixels to halfwords 97233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1) 98233d2500723e5594f3e7c70896ffeeef32b9c950ywan 99233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; 3rd 4 pixels 100233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r4, [r0, #8] ; load 4 src pixels 101233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [r0, #9] ; load 4 src pixels with 1 byte offset 102233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r5, [r2, #8] ; load 4 ref pixels 103233d2500723e5594f3e7c70896ffeeef32b9c950ywan 104233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; bilinear interpolation 105233d2500723e5594f3e7c70896ffeeef32b9c950ywan mvn r6, r6 106233d2500723e5594f3e7c70896ffeeef32b9c950ywan uhsub8 r4, r4, r6 107233d2500723e5594f3e7c70896ffeeef32b9c950ywan eor r4, r4, r10 108233d2500723e5594f3e7c70896ffeeef32b9c950ywan 109233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2) 110233d2500723e5594f3e7c70896ffeeef32b9c950ywan 111233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r6, r4, r5 ; calculate difference 112233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r7, r6, lr ; select bytes with positive difference 113233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r6, r5, r4 ; calculate difference with reversed operands 114233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r6, r6, lr ; select bytes with negative difference 115233d2500723e5594f3e7c70896ffeeef32b9c950ywan 116233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate partial sums 117233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r4, r7, lr ; calculate sum of positive differences 118233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r5, r6, lr ; calculate sum of negative differences 119233d2500723e5594f3e7c70896ffeeef32b9c950ywan orr r6, r6, r7 ; differences of all 4 pixels 120233d2500723e5594f3e7c70896ffeeef32b9c950ywan 121233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate total sum 122233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r8, r8, r4 ; add positive differences to sum 123233d2500723e5594f3e7c70896ffeeef32b9c950ywan sub r8, r8, r5 ; subtract negative differences from sum 124233d2500723e5594f3e7c70896ffeeef32b9c950ywan 125233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate sse 126233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r5, r6 ; byte (two pixels) to halfwords 127233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r7, r6, ror #8 ; another two pixels to halfwords 128233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1) 129233d2500723e5594f3e7c70896ffeeef32b9c950ywan 130233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; 4th 4 pixels 131233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r4, [r0, #12] ; load 4 src pixels 132233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [r0, #13] ; load 4 src pixels with 1 byte offset 133233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r5, [r2, #12] ; load 4 ref pixels 134233d2500723e5594f3e7c70896ffeeef32b9c950ywan 135233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; bilinear interpolation 136233d2500723e5594f3e7c70896ffeeef32b9c950ywan mvn r6, r6 137233d2500723e5594f3e7c70896ffeeef32b9c950ywan uhsub8 r4, r4, r6 138233d2500723e5594f3e7c70896ffeeef32b9c950ywan eor r4, r4, r10 139233d2500723e5594f3e7c70896ffeeef32b9c950ywan 140233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2) 141233d2500723e5594f3e7c70896ffeeef32b9c950ywan 142233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r6, r4, r5 ; calculate difference 143233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r0, r0, r1 ; set src_ptr to next row 144233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r7, r6, lr ; select bytes with positive difference 145233d2500723e5594f3e7c70896ffeeef32b9c950ywan usub8 r6, r5, r4 ; calculate difference with reversed operands 146233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r2, r2, r3 ; set dst_ptr to next row 147233d2500723e5594f3e7c70896ffeeef32b9c950ywan sel r6, r6, lr ; select bytes with negative difference 148233d2500723e5594f3e7c70896ffeeef32b9c950ywan 149233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate partial sums 150233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r4, r7, lr ; calculate sum of positive differences 151233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r5, r6, lr ; calculate sum of negative differences 152233d2500723e5594f3e7c70896ffeeef32b9c950ywan orr r6, r6, r7 ; differences of all 4 pixels 153233d2500723e5594f3e7c70896ffeeef32b9c950ywan 154233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate total sum 155233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r8, r8, r4 ; add positive differences to sum 156233d2500723e5594f3e7c70896ffeeef32b9c950ywan sub r8, r8, r5 ; subtract negative differences from sum 157233d2500723e5594f3e7c70896ffeeef32b9c950ywan 158233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; calculate sse 159233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r5, r6 ; byte (two pixels) to halfwords 160233d2500723e5594f3e7c70896ffeeef32b9c950ywan uxtb16 r7, r6, ror #8 ; another two pixels to halfwords 161233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r11, r5, r5, r11 ; dual signed multiply, add and accumulate (1) 162233d2500723e5594f3e7c70896ffeeef32b9c950ywan smlad r11, r7, r7, r11 ; dual signed multiply, add and accumulate (2) 163233d2500723e5594f3e7c70896ffeeef32b9c950ywan 164233d2500723e5594f3e7c70896ffeeef32b9c950ywan subs r12, r12, #1 165233d2500723e5594f3e7c70896ffeeef32b9c950ywan 166233d2500723e5594f3e7c70896ffeeef32b9c950ywan bne loop 167233d2500723e5594f3e7c70896ffeeef32b9c950ywan 168233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; return stuff 169233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [sp, #40] ; get address of sse 170233d2500723e5594f3e7c70896ffeeef32b9c950ywan mul r0, r8, r8 ; sum * sum 171233d2500723e5594f3e7c70896ffeeef32b9c950ywan str r11, [r6] ; store sse 172233d2500723e5594f3e7c70896ffeeef32b9c950ywan sub r0, r11, r0, lsr #8 ; return (sse - ((sum * sum) >> 8)) 173233d2500723e5594f3e7c70896ffeeef32b9c950ywan 174233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldmfd sp!, {r4-r12, pc} 175233d2500723e5594f3e7c70896ffeeef32b9c950ywan 176233d2500723e5594f3e7c70896ffeeef32b9c950ywan ENDP 177233d2500723e5594f3e7c70896ffeeef32b9c950ywan 178233d2500723e5594f3e7c70896ffeeef32b9c950ywanc80808080 179233d2500723e5594f3e7c70896ffeeef32b9c950ywan DCD 0x80808080 180233d2500723e5594f3e7c70896ffeeef32b9c950ywan 181233d2500723e5594f3e7c70896ffeeef32b9c950ywan END 182233d2500723e5594f3e7c70896ffeeef32b9c950ywan 183