mirror of
https://chromium.googlesource.com/libyuv/libyuv
synced 2025-12-06 16:56:55 +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
65 lines
1.6 KiB
C++
65 lines
1.6 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(_M_IX86)
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__declspec(naked) __declspec(align(16))
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uint32 SumSquareError_SSE2(const uint8* src_a, const uint8* src_b, int count) {
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__asm {
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mov eax, [esp + 4] // src_a
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mov edx, [esp + 8] // src_b
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mov ecx, [esp + 12] // count
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pxor xmm0, xmm0
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pxor xmm5, xmm5
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sub edx, eax
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align 16
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wloop:
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movdqa xmm1, [eax]
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movdqa xmm2, [eax + edx]
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lea eax, [eax + 16]
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sub ecx, 16
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movdqa xmm3, xmm1 // abs trick
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psubusb xmm1, xmm2
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psubusb xmm2, xmm3
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por xmm1, xmm2
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movdqa xmm2, xmm1
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punpcklbw xmm1, xmm5
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punpckhbw xmm2, xmm5
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pmaddwd xmm1, xmm1
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pmaddwd xmm2, xmm2
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paddd xmm0, xmm1
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paddd xmm0, xmm2
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jg wloop
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pshufd xmm1, xmm0, 0EEh
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paddd xmm0, xmm1
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pshufd xmm1, xmm0, 01h
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paddd xmm0, xmm1
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movd eax, xmm0
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ret
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}
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}
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#endif // _M_IX86
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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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