2010-05-18 17:58:33 +02:00
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;
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2010-09-09 14:16:39 +02:00
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; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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2010-05-18 17:58:33 +02:00
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;
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2010-06-18 18:39:21 +02:00
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; Use of this source code is governed by a BSD-style license
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2010-06-04 22:19:40 +02:00
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; that can be found in the LICENSE file in the root of the source
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; tree. An additional intellectual property rights grant can be found
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2010-06-18 18:39:21 +02:00
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; in the file PATENTS. All contributing project authors may
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2010-06-04 22:19:40 +02:00
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; be found in the AUTHORS file in the root of the source tree.
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2010-05-18 17:58:33 +02:00
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;
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.globl copy_mem16x16_ppc
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;# r3 unsigned char *src
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;# r4 int src_stride
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;# r5 unsigned char *dst
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;# r6 int dst_stride
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;# Make the assumption that input will not be aligned,
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;# but the output will be. So two reads and a perm
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;# for the input, but only one store for the output.
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copy_mem16x16_ppc:
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mfspr r11, 256 ;# get old VRSAVE
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oris r12, r11, 0xe000
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mtspr 256, r12 ;# set VRSAVE
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li r10, 16
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mtctr r10
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cp_16x16_loop:
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lvsl v0, 0, r3 ;# permutate value for alignment
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lvx v1, 0, r3
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lvx v2, r10, r3
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vperm v1, v1, v2, v0
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stvx v1, 0, r5
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add r3, r3, r4 ;# increment source pointer
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add r5, r5, r6 ;# increment destination pointer
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bdnz cp_16x16_loop
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mtspr 256, r11 ;# reset old VRSAVE
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