ref: 8366b414dd73a298d22910574c9e988865ac0e12
dir: /vp8/common/arm/armv6/copymem16x16_v6.asm/
; ; Copyright (c) 2010 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_copy_mem16x16_v6| ; ARM ; REQUIRE8 ; PRESERVE8 AREA Block, CODE, READONLY ; name this block of code ;void copy_mem16x16_v6( unsigned char *src, int src_stride, unsigned char *dst, int dst_stride) ;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |vp8_copy_mem16x16_v6| PROC stmdb sp!, {r4 - r7} ;push {r4-r7} ;preload pld [r0, #31] ; preload for next 16x16 block ands r4, r0, #15 beq copy_mem16x16_fast ands r4, r0, #7 beq copy_mem16x16_8 ands r4, r0, #3 beq copy_mem16x16_4 ;copy one byte each time ldrb r4, [r0] ldrb r5, [r0, #1] ldrb r6, [r0, #2] ldrb r7, [r0, #3] mov r12, #16 copy_mem16x16_1_loop strb r4, [r2] strb r5, [r2, #1] strb r6, [r2, #2] strb r7, [r2, #3] ldrb r4, [r0, #4] ldrb r5, [r0, #5] ldrb r6, [r0, #6] ldrb r7, [r0, #7] subs r12, r12, #1 strb r4, [r2, #4] strb r5, [r2, #5] strb r6, [r2, #6] strb r7, [r2, #7] ldrb r4, [r0, #8] ldrb r5, [r0, #9] ldrb r6, [r0, #10] ldrb r7, [r0, #11] strb r4, [r2, #8] strb r5, [r2, #9] strb r6, [r2, #10] strb r7, [r2, #11] ldrb r4, [r0, #12] ldrb r5, [r0, #13] ldrb r6, [r0, #14] ldrb r7, [r0, #15] add r0, r0, r1 strb r4, [r2, #12] strb r5, [r2, #13] strb r6, [r2, #14] strb r7, [r2, #15] add r2, r2, r3 ldrneb r4, [r0] ldrneb r5, [r0, #1] ldrneb r6, [r0, #2] ldrneb r7, [r0, #3] pld [r0, #31] ; preload for next 16x16 block bne copy_mem16x16_1_loop ldmia sp!, {r4 - r7} ;pop {r4-r7} mov pc, lr ;copy 4 bytes each time copy_mem16x16_4 ldr r4, [r0] ldr r5, [r0, #4] ldr r6, [r0, #8] ldr r7, [r0, #12] mov r12, #16 copy_mem16x16_4_loop subs r12, r12, #1 add r0, r0, r1 str r4, [r2] str r5, [r2, #4] str r6, [r2, #8] str r7, [r2, #12] add r2, r2, r3 ldrne r4, [r0] ldrne r5, [r0, #4] ldrne r6, [r0, #8] ldrne r7, [r0, #12] pld [r0, #31] ; preload for next 16x16 block bne copy_mem16x16_4_loop ldmia sp!, {r4 - r7} ;pop {r4-r7} mov pc, lr ;copy 8 bytes each time copy_mem16x16_8 sub r1, r1, #16 sub r3, r3, #16 mov r12, #16 copy_mem16x16_8_loop ldmia r0!, {r4-r5} ;ldm r0, {r4-r5} ldmia r0!, {r6-r7} add r0, r0, r1 stmia r2!, {r4-r5} subs r12, r12, #1 ;stm r2, {r4-r5} stmia r2!, {r6-r7} add r2, r2, r3 pld [r0, #31] ; preload for next 16x16 block bne copy_mem16x16_8_loop ldmia sp!, {r4 - r7} ;pop {r4-r7} mov pc, lr ;copy 16 bytes each time copy_mem16x16_fast ;sub r1, r1, #16 ;sub r3, r3, #16 mov r12, #16 copy_mem16x16_fast_loop ldmia r0, {r4-r7} ;ldm r0, {r4-r7} add r0, r0, r1 subs r12, r12, #1 stmia r2, {r4-r7} ;stm r2, {r4-r7} add r2, r2, r3 pld [r0, #31] ; preload for next 16x16 block bne copy_mem16x16_fast_loop ldmia sp!, {r4 - r7} ;pop {r4-r7} mov pc, lr ENDP ; |vp8_copy_mem16x16_v6| END