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add detection for OS support of SSE2

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This commit is contained in:
weidai 2003-09-05 00:54:14 +00:00
parent 93ba4e160f
commit ac8389ac92
1 changed files with 41 additions and 1 deletions
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42
integer.cpp
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@ -21,6 +21,8 @@
#ifdef __GNUC__
#include <xmmintrin.h>
#include <malloc.h>
#include <signal.h>
#include <setjmp.h>
#else
#include <emmintrin.h>
#endif
@ -893,6 +895,15 @@ static void CpuId(word32 input, word32 *output)
#endif
}
#ifdef SSE2_INTRINSICS_AVAILABLE
#ifndef _MSC_VER
static jmp_buf s_env;
static void SigIllHandler(int)
{
longjmp(s_env, 1);
}
#endif
static bool HasSSE2()
{
if (!s_sse2Enabled)
@ -900,8 +911,37 @@ static bool HasSSE2()
word32 cpuid[4];
CpuId(1, cpuid);
return (cpuid[3] & (1 << 26)) != 0;
if ((cpuid[3] & (1 << 26)) == 0)
return false;
#ifdef _MSC_VER
__try
{
__asm xorpd xmm0, xmm0 // executing SSE2 instruction
}
__except (1)
{
return false;
}
return true;
#else
typedef void (*SigHandler)(int);
SigHandler oldHandler = signal(SIGILL, SigIllHandler);
if (oldHandler == SIG_ERR)
return false;
bool result = true;
if (setjmp(s_env))
result = false;
else
__asm __volatile ("xorps %xmm0, %xmm0");
signal(SIGILL, oldHandler);
return result;
#endif
}
#endif
static bool IsP4()
{