| ; |
| ; 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. |
| ; |
| |
| |
| .globl copy_mem16x16_ppc |
| |
| ;# r3 unsigned char *src |
| ;# r4 int src_stride |
| ;# r5 unsigned char *dst |
| ;# r6 int dst_stride |
| |
| ;# Make the assumption that input will not be aligned, |
| ;# but the output will be. So two reads and a perm |
| ;# for the input, but only one store for the output. |
| copy_mem16x16_ppc: |
| mfspr r11, 256 ;# get old VRSAVE |
| oris r12, r11, 0xe000 |
| mtspr 256, r12 ;# set VRSAVE |
| |
| li r10, 16 |
| mtctr r10 |
| |
| cp_16x16_loop: |
| lvsl v0, 0, r3 ;# permutate value for alignment |
| |
| lvx v1, 0, r3 |
| lvx v2, r10, r3 |
| |
| vperm v1, v1, v2, v0 |
| |
| stvx v1, 0, r5 |
| |
| add r3, r3, r4 ;# increment source pointer |
| add r5, r5, r6 ;# increment destination pointer |
| |
| bdnz cp_16x16_loop |
| |
| mtspr 256, r11 ;# reset old VRSAVE |
| |
| blr |
