Bommels05/Mozilla
Bommels05/Mozilla
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Bug 137478 - try not to confuse the compiler with inline asm.

Browse Source 
r=sicking, sr=bryner


git-svn-id: svn://10.0.0.236/trunk@153589 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
tor%cs.brown.edu 2004-03-05 21:59:21 +00:00
parent a0e4ce1cf3
commit ac5c4f6447
1 changed files with 6 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
mozilla/jpeg/jdapimin.c
View File

@ -22,12 +22,12 @@
#ifdef HAVE_MMX_INTEL_MNEMONICS
int MMXAvailable;
int mmxsupport();
static int mmxsupport();
#endif
#ifdef HAVE_SSE2_INTEL_MNEMONICS
int SSE2Available = 0;
int sse2support();
static int sse2support();
#endif
@ -426,7 +426,7 @@ jpeg_finish_decompress (j_decompress_ptr cinfo)
#ifdef HAVE_MMX_INTEL_MNEMONICS
int mmxsupport()
static int mmxsupport()
{
int mmx_supported = 0;
@ -447,8 +447,7 @@ int mmxsupport()
xor eax, eax //Set eax to zero
_asm _emit 0x0f //CPUID instruction (two bytes opcode)
_asm _emit 0xa2
cpuid
cmp eax, 1 //make sure eax return non-zero value
jl NOT_SUPPORTED //If eax is zero, mmx not supported
@ -457,8 +456,7 @@ int mmxsupport()
inc eax //Now increment eax to 1. This instruction is
//faster than the instruction "mov eax, 1"
_asm _emit 0x0f //CPUID instruction
_asm _emit 0xa2
cpuid
and edx, 0x00800000 //mask out all bits but mmx bit(24)
cmp edx, 0 // 0 = mmx not supported
@ -477,7 +475,7 @@ NOT_SUPPORTED:
#ifdef HAVE_SSE2_INTEL_MNEMONICS
int sse2support()
static int sse2support()
{
int sse2available = 0;
int my_edx;