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_sad16x16_armv6| 13233d2500723e5594f3e7c70896ffeeef32b9c950ywan 14233d2500723e5594f3e7c70896ffeeef32b9c950ywan ARM 15233d2500723e5594f3e7c70896ffeeef32b9c950ywan REQUIRE8 16233d2500723e5594f3e7c70896ffeeef32b9c950ywan PRESERVE8 17233d2500723e5594f3e7c70896ffeeef32b9c950ywan 18233d2500723e5594f3e7c70896ffeeef32b9c950ywan AREA ||.text||, CODE, READONLY, ALIGN=2 19233d2500723e5594f3e7c70896ffeeef32b9c950ywan 20233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r0 const unsigned char *src_ptr 21233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r1 int src_stride 22233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r2 const unsigned char *ref_ptr 23233d2500723e5594f3e7c70896ffeeef32b9c950ywan; r3 int ref_stride 24233d2500723e5594f3e7c70896ffeeef32b9c950ywan; stack max_sad (not used) 25233d2500723e5594f3e7c70896ffeeef32b9c950ywan|vp8_sad16x16_armv6| PROC 26233d2500723e5594f3e7c70896ffeeef32b9c950ywan stmfd sp!, {r4-r12, lr} 27233d2500723e5594f3e7c70896ffeeef32b9c950ywan 28233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r0, r1, lsl #0] 29233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r2, r3, lsl #0] 30233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r0, r1, lsl #1] 31233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r2, r3, lsl #1] 32233d2500723e5594f3e7c70896ffeeef32b9c950ywan 33233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov r4, #0 ; sad = 0; 34233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov r5, #8 ; loop count 35233d2500723e5594f3e7c70896ffeeef32b9c950ywan 36233d2500723e5594f3e7c70896ffeeef32b9c950ywanloop 37233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; 1st row 38233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [r0, #0x0] ; load 4 src pixels (1A) 39233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r8, [r2, #0x0] ; load 4 ref pixels (1A) 40233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r7, [r0, #0x4] ; load 4 src pixels (1A) 41233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r9, [r2, #0x4] ; load 4 ref pixels (1A) 42233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r10, [r0, #0x8] ; load 4 src pixels (1B) 43233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r11, [r0, #0xC] ; load 4 src pixels (1B) 44233d2500723e5594f3e7c70896ffeeef32b9c950ywan 45233d2500723e5594f3e7c70896ffeeef32b9c950ywan usada8 r4, r8, r6, r4 ; calculate sad for 4 pixels 46233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r8, r7, r9 ; calculate sad for 4 pixels 47233d2500723e5594f3e7c70896ffeeef32b9c950ywan 48233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r12, [r2, #0x8] ; load 4 ref pixels (1B) 49233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr lr, [r2, #0xC] ; load 4 ref pixels (1B) 50233d2500723e5594f3e7c70896ffeeef32b9c950ywan 51233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r0, r0, r1 ; set src pointer to next row 52233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r2, r2, r3 ; set dst pointer to next row 53233d2500723e5594f3e7c70896ffeeef32b9c950ywan 54233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r0, r1, lsl #1] 55233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r2, r3, lsl #1] 56233d2500723e5594f3e7c70896ffeeef32b9c950ywan 57233d2500723e5594f3e7c70896ffeeef32b9c950ywan usada8 r4, r10, r12, r4 ; calculate sad for 4 pixels 58233d2500723e5594f3e7c70896ffeeef32b9c950ywan usada8 r8, r11, lr, r8 ; calculate sad for 4 pixels 59233d2500723e5594f3e7c70896ffeeef32b9c950ywan 60233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r6, [r0, #0x0] ; load 4 src pixels (2A) 61233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r7, [r0, #0x4] ; load 4 src pixels (2A) 62233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r4, r4, r8 ; add partial sad values 63233d2500723e5594f3e7c70896ffeeef32b9c950ywan 64233d2500723e5594f3e7c70896ffeeef32b9c950ywan ; 2nd row 65233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r8, [r2, #0x0] ; load 4 ref pixels (2A) 66233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r9, [r2, #0x4] ; load 4 ref pixels (2A) 67233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r10, [r0, #0x8] ; load 4 src pixels (2B) 68233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r11, [r0, #0xC] ; load 4 src pixels (2B) 69233d2500723e5594f3e7c70896ffeeef32b9c950ywan 70233d2500723e5594f3e7c70896ffeeef32b9c950ywan usada8 r4, r6, r8, r4 ; calculate sad for 4 pixels 71233d2500723e5594f3e7c70896ffeeef32b9c950ywan usad8 r8, r7, r9 ; calculate sad for 4 pixels 72233d2500723e5594f3e7c70896ffeeef32b9c950ywan 73233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr r12, [r2, #0x8] ; load 4 ref pixels (2B) 74233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldr lr, [r2, #0xC] ; load 4 ref pixels (2B) 75233d2500723e5594f3e7c70896ffeeef32b9c950ywan 76233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r0, r0, r1 ; set src pointer to next row 77233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r2, r2, r3 ; set dst pointer to next row 78233d2500723e5594f3e7c70896ffeeef32b9c950ywan 79233d2500723e5594f3e7c70896ffeeef32b9c950ywan usada8 r4, r10, r12, r4 ; calculate sad for 4 pixels 80233d2500723e5594f3e7c70896ffeeef32b9c950ywan usada8 r8, r11, lr, r8 ; calculate sad for 4 pixels 81233d2500723e5594f3e7c70896ffeeef32b9c950ywan 82233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r0, r1, lsl #1] 83233d2500723e5594f3e7c70896ffeeef32b9c950ywan pld [r2, r3, lsl #1] 84233d2500723e5594f3e7c70896ffeeef32b9c950ywan 85233d2500723e5594f3e7c70896ffeeef32b9c950ywan subs r5, r5, #1 ; decrement loop counter 86233d2500723e5594f3e7c70896ffeeef32b9c950ywan add r4, r4, r8 ; add partial sad values 87233d2500723e5594f3e7c70896ffeeef32b9c950ywan 88233d2500723e5594f3e7c70896ffeeef32b9c950ywan bne loop 89233d2500723e5594f3e7c70896ffeeef32b9c950ywan 90233d2500723e5594f3e7c70896ffeeef32b9c950ywan mov r0, r4 ; return sad 91233d2500723e5594f3e7c70896ffeeef32b9c950ywan ldmfd sp!, {r4-r12, pc} 92233d2500723e5594f3e7c70896ffeeef32b9c950ywan 93233d2500723e5594f3e7c70896ffeeef32b9c950ywan ENDP 94233d2500723e5594f3e7c70896ffeeef32b9c950ywan 95233d2500723e5594f3e7c70896ffeeef32b9c950ywan END 96233d2500723e5594f3e7c70896ffeeef32b9c950ywan 97