mirror of
https://chromium.googlesource.com/libyuv/libyuv
synced 2025-12-07 17:26:49 +08:00
3f467451cf
BUG=none TEST=none Review URL: https://webrtc-codereview.appspot.com/921004 git-svn-id: http://libyuv.googlecode.com/svn/trunk@429 16f28f9a-4ce2-e073-06de-1de4eb20be90
71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/*
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* Copyright 2012 The LibYuv Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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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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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "libyuv/basic_types.h"
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#ifdef __cplusplus
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namespace libyuv {
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extern "C" {
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#endif
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#if !defined(YUV_DISABLE_ASM) && (defined(__x86_64__) || defined(__i386__))
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uint32 SumSquareError_SSE2(const uint8* src_a, const uint8* src_b, int count) {
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uint32 sse;
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asm volatile (
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"pxor %%xmm0,%%xmm0 \n"
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"pxor %%xmm5,%%xmm5 \n"
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"sub %0,%1 \n"
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".p2align 4 \n"
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"1: \n"
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"movdqa (%0),%%xmm1 \n"
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"movdqa (%0,%1,1),%%xmm2 \n"
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"lea 0x10(%0),%0 \n"
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"sub $0x10,%2 \n"
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"movdqa %%xmm1,%%xmm3 \n"
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"psubusb %%xmm2,%%xmm1 \n"
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"psubusb %%xmm3,%%xmm2 \n"
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"por %%xmm2,%%xmm1 \n"
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"movdqa %%xmm1,%%xmm2 \n"
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"punpcklbw %%xmm5,%%xmm1 \n"
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"punpckhbw %%xmm5,%%xmm2 \n"
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"pmaddwd %%xmm1,%%xmm1 \n"
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"pmaddwd %%xmm2,%%xmm2 \n"
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"paddd %%xmm1,%%xmm0 \n"
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"paddd %%xmm2,%%xmm0 \n"
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"jg 1b \n"
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"pshufd $0xee,%%xmm0,%%xmm1 \n"
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"paddd %%xmm1,%%xmm0 \n"
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"pshufd $0x1,%%xmm0,%%xmm1 \n"
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"paddd %%xmm1,%%xmm0 \n"
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"movd %%xmm0,%3 \n"
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: "+r"(src_a), // %0
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"+r"(src_b), // %1
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"+r"(count), // %2
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"=g"(sse) // %3
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:
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: "memory", "cc"
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#if defined(__SSE2__)
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, "xmm0", "xmm1", "xmm2", "xmm5"
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#endif
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);
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return sse;
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}
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#endif // defined(__x86_64__) || defined(__i386__)
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#ifdef __cplusplus
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} // extern "C"
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} // namespace libyuv
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#endif
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