Mercurial > sdl-ios-xcode
diff src/audio/SDL_mixer_MMX_VC.c @ 746:72ef7ce609ef
Greatly simplified the SDL CPU info code
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 24 Nov 2003 09:22:12 +0000 |
| parents | 64fe373be3dc |
| children | b4117292e587 |
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--- a/src/audio/SDL_mixer_MMX_VC.c Mon Nov 24 09:16:52 2003 +0000 +++ b/src/audio/SDL_mixer_MMX_VC.c Mon Nov 24 09:22:12 2003 +0000 @@ -1,3 +1,4 @@ +#if defined(USE_ASM_MIXER_VC) // MMX assembler version of SDL_MixAudio for signed little endian 16 bit samples and signed 8 bit samples // Copyright 2002 Stephane Marchesin (stephane.marchesin@wanadoo.fr) // Converted to Intel ASM notation by Cth @@ -11,7 +12,6 @@ // Mixing for 16 bit signed buffers //////////////////////////////////////////////// -#if defined(USE_ASM_MIXER_VC) #include <windows.h> #include <stdio.h> @@ -152,54 +152,4 @@ } } -int _SDL_IsMMX_VC() -{ - // This bit flag can get set on calling cpuid - // with register eax set to 1 - const int _MMX_FEATURE_BIT = 0x00800000; - DWORD dwFeature = 0; - __try { - _asm { - mov eax,1 - cpuid - mov dwFeature,edx - } - } __except ( EXCEPTION_EXECUTE_HANDLER) { - return 0; - } - if (dwFeature & _MMX_FEATURE_BIT) { - __try { - __asm { - pxor mm0, mm0 - emms - } - } __except (EXCEPTION_EXECUTE_HANDLER) { - return(0); - } - return 1; - } - - return 0; -} - -static int _notTwice = 2; - -int SDL_IsMMX_VC() -{ - if (_notTwice > 1) - { - _notTwice = _SDL_IsMMX_VC(); -/* -#ifdef _DEBUG - if (_notTwice) - MessageBox( NULL, "Using MMX!!!", "Error", MB_OK | MB_ICONINFORMATION ); - else - MessageBox( NULL, "Not sing MMX!!!", "Error", MB_OK | MB_ICONINFORMATION ); -#endif -*/ - } - return _notTwice; -} - -#endif - +#endif /* USE_ASM_MIXER_VC */