Macintosh-SW/MacGLide
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Allocate at 32-byte boundaries for altivec + cachline clearing, added altivec detection

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This commit is contained in:
Jens Hemprich 2006-07-06 21:20:35 +00:00
parent dcd348b632
commit f9d2ca3785
1 changed files with 29 additions and 3 deletions
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32
MacGLide/Mac/MacGLide.cpp
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@ -20,6 +20,8 @@
#include <profiler.h> #include <profiler.h>
#endif #endif
#include <Gestalt.h>
OSErr __macglide_initialize(struct CFragInitBlock* initBlkPtr) OSErr __macglide_initialize(struct CFragInitBlock* initBlkPtr)
{ {
OSErr err = __initialize((CFragInitBlock*) initBlkPtr); OSErr err = __initialize((CFragInitBlock*) initBlkPtr);
@ -76,12 +78,16 @@ void __macglide_terminate()
const char* OpenGLideProductName = "MacGLide"; const char* OpenGLideProductName = "MacGLide";
// Allow allocation of memory at 16-byte boundaries to support altivec // Allow allocation of memory at 32-byte boundaries to support G4 cacheline clearing
void* AllocSysPtr16ByteAligned(long buffersize) void* AllocSysPtr16ByteAligned(long buffersize)
{ {
void* buffer = NewPtrSys(buffersize + 16); // Align buffers to 32byte boundaries so
// we can use __dcbz() to clear buffers
const int align = 32;
const int align_mask = 0xffffffe0;
void* buffer = NewPtrSys(buffersize + align);
if (buffer == NULL) return NULL; if (buffer == NULL) return NULL;
unsigned long aligned_buffer = (reinterpret_cast<unsigned long>(buffer) + 16) & 0xfffffff0; unsigned long aligned_buffer = (reinterpret_cast<unsigned long>(buffer) + align) & align_mask;
// remember the real location of the buffer // remember the real location of the buffer
(reinterpret_cast<unsigned long*>(aligned_buffer))[-1] = reinterpret_cast<unsigned long>(buffer); (reinterpret_cast<unsigned long*>(aligned_buffer))[-1] = reinterpret_cast<unsigned long>(buffer);
return reinterpret_cast<void*>(aligned_buffer); return reinterpret_cast<void*>(aligned_buffer);
@ -124,6 +130,26 @@ char* _strdate(char* timebuf)
return timebuf; return timebuf;
} }
OpenGLideVectorUnitType GetVectorUnitType()
{
long cpuAttributes;
OpenGLideVectorUnitType type = OpenGLideVectorUnitType_None;
OSErr err = Gestalt( gestaltPowerPCProcessorFeatures, &cpuAttributes );
if(noErr == err)
{
if (( 1 << gestaltPowerPCHasVectorInstructions) & cpuAttributes)
{
type = OpenGLideVectorUnitType_Altivec;
}
}
return type;
}
const char* OpenGLideVectorUnitNames[] =
{
"PowerPC AltiVec"
};
////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////
// Big endian conversion functions // Big endian conversion functions
////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////