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Bug 414042 - MSVC71 build error in jdapimin.c attempting to include intrin.h

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p=mook@songbirdnest.com (Mook)
r=mmoy@yahoo.com (Michael Moy)
sr=pavlov@pavlov.net (Stuart Parmenter)
a=dsicore@mozilla.com (Damon Sicore)


git-svn-id: svn://10.0.0.236/trunk@247676 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
gijskruitbosch%gmail.com 2008-03-12 21:36:47 +00:00
parent 526365f5be
commit fd0173cca0
1 changed files with 41 additions and 0 deletions
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41
mozilla/jpeg/jdapimin.c
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@ -21,7 +21,48 @@
#include "jpeglib.h" #include "jpeglib.h"
#ifdef HAVE_MMX_INTEL_MNEMONICS #ifdef HAVE_MMX_INTEL_MNEMONICS
#if _MSC_VER >= 1400
#include "intrin.h" #include "intrin.h"
#else
/* no __cpuid intrinsic, use a manually rewritten replacement */
void __stdcall __cpuid( int CPUInfo[4], int InfoType )
{
int my_eax = 0, my_ebx = 0, my_ecx = 0, my_edx = 0;
__asm {
/* check eflags bit 21 to see if cpuid is supported */
pushfd /* save eflags to stack */
pop eax /* and put it in eax */
mov ecx, eax /* save a copy in ecx to compare against */
xor eax, 0x200000 /* toggle ID bit (bit 21) in eflags */
push eax /* save modified eflags to stack */
popfd /* set eflags register with modified value */
pushfd /* read eflags back out */
pop eax
xor eax, ecx /* check for modified eflags */
jz NOT_SUPPORTED /* cpuid not supported */
/* check to see if the requested cpuid type is supported */
xor eax, eax /* set eax to zero */
cpuid
cmp eax, InfoType
jl NOT_SUPPORTED /* the requested cpuid type is not supported */
/* actually make the cpuid call */
mov eax, InfoType
cpuid
mov my_eax, eax
mov my_ebx, ebx
mov my_ecx, ecx
mov my_edx, edx
NOT_SUPPORTED:
}
CPUInfo[0] = my_eax;
CPUInfo[1] = my_ebx;
CPUInfo[2] = my_ecx;
CPUInfo[3] = my_edx;
}
#endif /* _MSC_VER >= 1400 */
int MMXAvailable; int MMXAvailable;
static int mmxsupport(); static int mmxsupport();
#endif #endif