1 ; 2 ; Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 ; 4 ; Use of this source code is governed by a BSD-style license 5 ; that can be found in the LICENSE file in the root of the source 6 ; tree. An additional intellectual property rights grant can be found 7 ; in the file PATENTS. All contributing project authors may 8 ; be found in the AUTHORS file in the root of the source tree. 9 ; 10 11 12 .globl copy_mem16x16_ppc 13 14 ;# r3 unsigned char *src 15 ;# r4 int src_stride 16 ;# r5 unsigned char *dst 17 ;# r6 int dst_stride 18 19 ;# Make the assumption that input will not be aligned, 20 ;# but the output will be. So two reads and a perm 21 ;# for the input, but only one store for the output. 22 copy_mem16x16_ppc: 23 mfspr r11, 256 ;# get old VRSAVE 24 oris r12, r11, 0xe000 25 mtspr 256, r12 ;# set VRSAVE 26 27 li r10, 16 28 mtctr r10 29 30 cp_16x16_loop: 31 lvsl v0, 0, r3 ;# permutate value for alignment 32 33 lvx v1, 0, r3 34 lvx v2, r10, r3 35 36 vperm v1, v1, v2, v0 37 38 stvx v1, 0, r5 39 40 add r3, r3, r4 ;# increment source pointer 41 add r5, r5, r6 ;# increment destination pointer 42 43 bdnz cp_16x16_loop 44 45 mtspr 256, r11 ;# reset old VRSAVE 46 47 blr 48
