ref: 14bc7731996cd27f1d2193d2f841e92ae8fad703
dir: /vp8/encoder/arm/armv6/vp8_subtract_armv6.asm/
; ; 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 |vp8_subtract_mby_armv6| EXPORT |vp8_subtract_mbuv_armv6| EXPORT |vp8_subtract_b_armv6| INCLUDE vp8_asm_enc_offsets.asm ARM REQUIRE8 PRESERVE8 AREA ||.text||, CODE, READONLY, ALIGN=2 ; r0 BLOCK *be ; r1 BLOCKD *bd ; r2 int pitch |vp8_subtract_b_armv6| PROC stmfd sp!, {r4-r9} ldr r4, [r0, #vp8_block_base_src] ldr r5, [r0, #vp8_block_src] ldr r6, [r0, #vp8_block_src_diff] ldr r3, [r4] ldr r7, [r0, #vp8_block_src_stride] add r3, r3, r5 ; src = *base_src + src ldr r8, [r1, #vp8_blockd_predictor] mov r9, #4 ; loop count loop_block ldr r0, [r3], r7 ; src ldr r1, [r8], r2 ; pred uxtb16 r4, r0 ; [s2 | s0] uxtb16 r5, r1 ; [p2 | p0] uxtb16 r0, r0, ror #8 ; [s3 | s1] uxtb16 r1, r1, ror #8 ; [p3 | p1] usub16 r4, r4, r5 ; [d2 | d0] usub16 r5, r0, r1 ; [d3 | d1] subs r9, r9, #1 ; decrement loop counter pkhbt r0, r4, r5, lsl #16 ; [d1 | d0] pkhtb r1, r5, r4, asr #16 ; [d3 | d2] str r0, [r6, #0] ; diff str r1, [r6, #4] ; diff add r6, r6, r2, lsl #1 ; update diff pointer bne loop_block ldmfd sp!, {r4-r9} mov pc, lr ENDP ; r0 short *diff ; r1 unsigned char *usrc ; r2 unsigned char *vsrc ; r3 int src_stride ; sp unsigned char *upred ; sp unsigned char *vpred ; sp int pred_stride |vp8_subtract_mbuv_armv6| PROC stmfd sp!, {r4-r11} add r0, r0, #512 ; set *diff point to Cb mov r4, #8 ; loop count ldr r5, [sp, #32] ; upred ldr r12, [sp, #40] ; pred_stride ; Subtract U block loop_u ldr r6, [r1] ; usrc (A) ldr r7, [r5] ; upred (A) uxtb16 r8, r6 ; [s2 | s0] (A) uxtb16 r9, r7 ; [p2 | p0] (A) uxtb16 r10, r6, ror #8 ; [s3 | s1] (A) uxtb16 r11, r7, ror #8 ; [p3 | p1] (A) usub16 r6, r8, r9 ; [d2 | d0] (A) usub16 r7, r10, r11 ; [d3 | d1] (A) ldr r10, [r1, #4] ; usrc (B) ldr r11, [r5, #4] ; upred (B) pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (A) pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (A) str r8, [r0], #4 ; diff (A) uxtb16 r8, r10 ; [s2 | s0] (B) str r9, [r0], #4 ; diff (A) uxtb16 r9, r11 ; [p2 | p0] (B) uxtb16 r10, r10, ror #8 ; [s3 | s1] (B) uxtb16 r11, r11, ror #8 ; [p3 | p1] (B) usub16 r6, r8, r9 ; [d2 | d0] (B) usub16 r7, r10, r11 ; [d3 | d1] (B) add r1, r1, r3 ; update usrc pointer add r5, r5, r12 ; update upred pointer pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (B) pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (B) str r8, [r0], #4 ; diff (B) subs r4, r4, #1 ; update loop counter str r9, [r0], #4 ; diff (B) bne loop_u ldr r5, [sp, #36] ; vpred mov r4, #8 ; loop count ; Subtract V block loop_v ldr r6, [r2] ; vsrc (A) ldr r7, [r5] ; vpred (A) uxtb16 r8, r6 ; [s2 | s0] (A) uxtb16 r9, r7 ; [p2 | p0] (A) uxtb16 r10, r6, ror #8 ; [s3 | s1] (A) uxtb16 r11, r7, ror #8 ; [p3 | p1] (A) usub16 r6, r8, r9 ; [d2 | d0] (A) usub16 r7, r10, r11 ; [d3 | d1] (A) ldr r10, [r2, #4] ; vsrc (B) ldr r11, [r5, #4] ; vpred (B) pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (A) pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (A) str r8, [r0], #4 ; diff (A) uxtb16 r8, r10 ; [s2 | s0] (B) str r9, [r0], #4 ; diff (A) uxtb16 r9, r11 ; [p2 | p0] (B) uxtb16 r10, r10, ror #8 ; [s3 | s1] (B) uxtb16 r11, r11, ror #8 ; [p3 | p1] (B) usub16 r6, r8, r9 ; [d2 | d0] (B) usub16 r7, r10, r11 ; [d3 | d1] (B) add r2, r2, r3 ; update vsrc pointer add r5, r5, r12 ; update vpred pointer pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (B) pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (B) str r8, [r0], #4 ; diff (B) subs r4, r4, #1 ; update loop counter str r9, [r0], #4 ; diff (B) bne loop_v ldmfd sp!, {r4-r11} bx lr ENDP ; r0 short *diff ; r1 unsigned char *src ; r2 int src_stride ; r3 unsigned char *pred ; sp int pred_stride |vp8_subtract_mby_armv6| PROC stmfd sp!, {r4-r11} ldr r12, [sp, #32] ; pred_stride mov r4, #16 loop ldr r6, [r1] ; src (A) ldr r7, [r3] ; pred (A) uxtb16 r8, r6 ; [s2 | s0] (A) uxtb16 r9, r7 ; [p2 | p0] (A) uxtb16 r10, r6, ror #8 ; [s3 | s1] (A) uxtb16 r11, r7, ror #8 ; [p3 | p1] (A) usub16 r6, r8, r9 ; [d2 | d0] (A) usub16 r7, r10, r11 ; [d3 | d1] (A) ldr r10, [r1, #4] ; src (B) ldr r11, [r3, #4] ; pred (B) pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (A) pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (A) str r8, [r0], #4 ; diff (A) uxtb16 r8, r10 ; [s2 | s0] (B) str r9, [r0], #4 ; diff (A) uxtb16 r9, r11 ; [p2 | p0] (B) uxtb16 r10, r10, ror #8 ; [s3 | s1] (B) uxtb16 r11, r11, ror #8 ; [p3 | p1] (B) usub16 r6, r8, r9 ; [d2 | d0] (B) usub16 r7, r10, r11 ; [d3 | d1] (B) ldr r10, [r1, #8] ; src (C) ldr r11, [r3, #8] ; pred (C) pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (B) pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (B) str r8, [r0], #4 ; diff (B) uxtb16 r8, r10 ; [s2 | s0] (C) str r9, [r0], #4 ; diff (B) uxtb16 r9, r11 ; [p2 | p0] (C) uxtb16 r10, r10, ror #8 ; [s3 | s1] (C) uxtb16 r11, r11, ror #8 ; [p3 | p1] (C) usub16 r6, r8, r9 ; [d2 | d0] (C) usub16 r7, r10, r11 ; [d3 | d1] (C) ldr r10, [r1, #12] ; src (D) ldr r11, [r3, #12] ; pred (D) pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (C) pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (C) str r8, [r0], #4 ; diff (C) uxtb16 r8, r10 ; [s2 | s0] (D) str r9, [r0], #4 ; diff (C) uxtb16 r9, r11 ; [p2 | p0] (D) uxtb16 r10, r10, ror #8 ; [s3 | s1] (D) uxtb16 r11, r11, ror #8 ; [p3 | p1] (D) usub16 r6, r8, r9 ; [d2 | d0] (D) usub16 r7, r10, r11 ; [d3 | d1] (D) add r1, r1, r2 ; update src pointer add r3, r3, r12 ; update pred pointer pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (D) pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (D) str r8, [r0], #4 ; diff (D) subs r4, r4, #1 ; update loop counter str r9, [r0], #4 ; diff (D) bne loop ldmfd sp!, {r4-r11} bx lr ENDP END