remove local memcpy from synwinhk
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d169555b28
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a3ec43999f
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@ -76,7 +76,6 @@ setImmuneKeys(const DWORD *list, std::size_t size)
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#else
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#else
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#define assert(_X_) __noop()
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#define assert(_X_) __noop()
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#endif
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#endif
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#pragma function(memcpy)
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//
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//
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// debugging compile flag. when not zero the server doesn't grab
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// debugging compile flag. when not zero the server doesn't grab
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@ -655,79 +654,12 @@ DllMain(HINSTANCE instance, DWORD reason, LPVOID)
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extern "C" {
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extern "C" {
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// VS2005 hack to not link with the CRT
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#if _MSC_VER >= 1400
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BOOL WINAPI _DllMainCRTStartup(
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BOOL WINAPI _DllMainCRTStartup(
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HINSTANCE instance, DWORD reason, LPVOID lpreserved)
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HINSTANCE instance, DWORD reason, LPVOID lpreserved)
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{
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{
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return DllMain(instance, reason, lpreserved);
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return DllMain(instance, reason, lpreserved);
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}
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}
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// VS2005 is a bit more bright than VC6 and optimize simple copy loop to
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// intrinsic memcpy.
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void * __cdecl memcpy(void * _Dst, const void * _Src, size_t _MaxCount)
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{
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void * _DstBackup = _Dst;
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switch (_MaxCount & 3) {
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case 3:
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((char*)_Dst)[0] = ((char*)_Src)[0];
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++(char*&)_Dst;
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++(char*&)_Src;
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--_MaxCount;
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case 2:
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((char*)_Dst)[0] = ((char*)_Src)[0];
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++(char*&)_Dst;
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++(char*&)_Src;
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--_MaxCount;
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case 1:
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((char*)_Dst)[0] = ((char*)_Src)[0];
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++(char*&)_Dst;
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++(char*&)_Src;
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--_MaxCount;
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break;
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case 0:
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break;
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default:
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__assume(0);
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break;
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}
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// I think it's faster on intel to deference than modify the pointer.
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const size_t max = _MaxCount / sizeof(UINT_PTR);
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for (size_t i = 0; i < max; ++i) {
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((UINT_PTR*)_Dst)[i] = ((UINT_PTR*)_Src)[i];
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}
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(UINT_PTR*&)_Dst += max;
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(UINT_PTR*&)_Src += max;
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switch (_MaxCount & 3) {
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case 3:
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((char*)_Dst)[0] = ((char*)_Src)[0];
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++(char*&)_Dst;
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++(char*&)_Src;
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case 2:
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((char*)_Dst)[0] = ((char*)_Src)[0];
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++(char*&)_Dst;
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++(char*&)_Src;
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case 1:
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((char*)_Dst)[0] = ((char*)_Src)[0];
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++(char*&)_Dst;
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++(char*&)_Src;
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break;
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case 0:
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break;
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default:
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__assume(0);
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break;
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}
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return _DstBackup;
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}
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#endif
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int
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int
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init(DWORD threadID)
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init(DWORD threadID)
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{
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{
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