diff options
Diffstat (limited to 'src/filters/renderer/MpcAudioRenderer/SoundTouch/source/cpu_detect_x86_win.cpp')
| -rw-r--r-- | src/filters/renderer/MpcAudioRenderer/SoundTouch/source/cpu_detect_x86_win.cpp | 115 |
1 files changed, 58 insertions, 57 deletions
diff --git a/src/filters/renderer/MpcAudioRenderer/SoundTouch/source/cpu_detect_x86_win.cpp b/src/filters/renderer/MpcAudioRenderer/SoundTouch/source/cpu_detect_x86_win.cpp index d9287b613..c6c542467 100644 --- a/src/filters/renderer/MpcAudioRenderer/SoundTouch/source/cpu_detect_x86_win.cpp +++ b/src/filters/renderer/MpcAudioRenderer/SoundTouch/source/cpu_detect_x86_win.cpp @@ -12,10 +12,10 @@ ///
////////////////////////////////////////////////////////////////////////////////
//
-// Last changed : $Date: 2008-02-10 18:26:55 +0200 (Sun, 10 Feb 2008) $
+// Last changed : $Date: 2009-02-13 18:22:48 +0200 (Fri, 13 Feb 2009) $
// File revision : $Revision: 4 $
//
-// $Id: cpu_detect_x86_win.cpp 11 2008-02-10 16:26:55Z oparviai $
+// $Id: cpu_detect_x86_win.cpp 62 2009-02-13 16:22:48Z oparviai $
//
////////////////////////////////////////////////////////////////////////////////
//
@@ -41,15 +41,10 @@ ////////////////////////////////////////////////////////////////////////////////
#include "cpu_detect.h"
-#include "intrin.h"
-
-typedef enum PROCESSOR_TYPE
-{
- PROCESSOR_AMD,
- PROCESSOR_INTEL,
- PROCESSOR_UNKNOWN
-};
+#ifndef WIN32
+#error wrong platform - this source code file is exclusively for Win32 platform
+#endif
//////////////////////////////////////////////////////////////////////////////
//
@@ -76,53 +71,59 @@ uint detectCPUextensions(void) if (_dwDisabledISA == 0xffffffff) return 0;
-unsigned nHighestFeature;
-unsigned nHighestFeatureEx;
-int nBuff[4];
-char szMan[13];
-char szFeatures[256];
-PROCESSOR_TYPE nType;
-
- // Get CPU manufacturer and highest CPUID
- __cpuid(nBuff, 0);
- nHighestFeature = (unsigned)nBuff[0];
- *(int*)&szMan[0] = nBuff[1];
- *(int*)&szMan[4] = nBuff[3];
- *(int*)&szMan[8] = nBuff[2];
- szMan[12] = 0;
- if(strcmp(szMan, "AuthenticAMD") == 0)
- nType = PROCESSOR_AMD;
- else if(strcmp(szMan, "GenuineIntel") == 0)
- nType = PROCESSOR_INTEL;
- else
- nType = PROCESSOR_UNKNOWN;
-
- // Get highest extended feature
- __cpuid(nBuff, 0x80000000);
- nHighestFeatureEx = (unsigned)nBuff[0];
-
- // Get CPU features
- szFeatures[0] = 0;
- if(nHighestFeature >= 1)
- {
- __cpuid(nBuff, 1);
- if(nBuff[3] & 1<<23) res|=SUPPORT_MMX;
- if(nBuff[3] & 1<<25) res|=SUPPORT_SSE;
- if(nBuff[3] & 1<<26) res|=SUPPORT_SSE2;
- }
-
- // AMD specific:
- if(nType == PROCESSOR_AMD)
- {
- // Get extended features
- __cpuid(nBuff, 0x80000000);
- if(nHighestFeatureEx >= 0x80000001)
- {
- __cpuid(nBuff, 0x80000001);
- if(nBuff[3] & 1<<31) res|=SUPPORT_3DNOW;
- }
- }
-
+ _asm
+ {
+ ; check if 'cpuid' instructions is available by toggling eflags bit 21
+ ;
+ xor esi, esi ; clear esi = result register
+
+ pushfd ; save eflags to stack
+ mov eax,dword ptr [esp] ; load eax from stack (with eflags)
+ mov ecx, eax ; save the original eflags values to ecx
+ xor eax, 0x00200000 ; toggle bit 21
+ mov dword ptr [esp],eax ; store toggled eflags to stack
+ popfd ; load eflags from stack
+
+ pushfd ; save updated eflags to stack
+ mov eax,dword ptr [esp] ; load eax from stack
+ popfd ; pop stack to restore stack pointer
+
+ xor edx, edx ; clear edx for defaulting no mmx
+ cmp eax, ecx ; compare to original eflags values
+ jz end ; jumps to 'end' if cpuid not present
+
+ ; cpuid instruction available, test for presence of mmx instructions
+ mov eax, 1
+ cpuid
+ test edx, 0x00800000
+ jz end ; branch if MMX not available
+
+ or esi, SUPPORT_MMX ; otherwise add MMX support bit
+
+ test edx, 0x02000000
+ jz test3DNow ; branch if SSE not available
+
+ or esi, SUPPORT_SSE ; otherwise add SSE support bit
+
+ test3DNow:
+ ; test for precense of AMD extensions
+ mov eax, 0x80000000
+ cpuid
+ cmp eax, 0x80000000
+ jbe end ; branch if no AMD extensions detected
+
+ ; test for precense of 3DNow! extension
+ mov eax, 0x80000001
+ cpuid
+ test edx, 0x80000000
+ jz end ; branch if 3DNow! not detected
+
+ or esi, SUPPORT_3DNOW ; otherwise add 3DNow support bit
+
+ end:
+
+ mov res, esi
+ }
return res & ~_dwDisabledISA;
}
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