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fixes for MSVC6; also: default to best flavors of detect code

This commit is contained in:
Josh Coalson 2007-03-03 02:04:15 +00:00
parent 83f42e358b
commit 1ca3a445f8
1 changed files with 19 additions and 3 deletions
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22
src/libFLAC/cpu.c
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@ -115,7 +115,7 @@ const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXTMMX = 0x00400000;
* 6 bytes extra in case our estimate is wrong
* 12 bytes puts us in the NOP "landing zone"
*/
# define USE_OBSOLETE_SIGCONTEXT_FLAVOR /*@@@@@@ #define this to use the older signal handler method */
# undef USE_OBSOLETE_SIGCONTEXT_FLAVOR /* #define this to use the older signal handler method */
# ifdef USE_OBSOLETE_SIGCONTEXT_FLAVOR
static void sigill_handler_sse_os(int signal, struct sigcontext sc)
{
@ -132,7 +132,7 @@ const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXTMMX = 0x00400000;
# endif
# elif defined(_MSC_VER)
# include <windows.h>
# define USE_TRY_CATCH_FLAVOR /*@@@@@@ #define this to use the try/catch method for catching illegal opcode exception */
# undef USE_TRY_CATCH_FLAVOR /* #define this to use the try/catch method for catching illegal opcode exception */
# ifdef USE_TRY_CATCH_FLAVOR
# else
LONG CALLBACK sigill_handler_sse_os(EXCEPTION_POINTERS *ep)
@ -247,7 +247,16 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
#elif defined(_MSC_VER)
# ifdef USE_TRY_CATCH_FLAVOR
_try {
__asm xorps xmm0,xmm0
__asm {
# if _MSC_VER <= 1200
/* VC6 assembler doesn't know SSE, have to emit bytecode instead */
_emit 0x0F
_emit 0x57
_emit 0xC0
# else
xorps xmm0,xmm0
# endif
}
}
_except(EXCEPTION_EXECUTE_HANDLER) {
if (_exception_code() == STATUS_ILLEGAL_INSTRUCTION)
@ -262,7 +271,14 @@ void FLAC__cpu_info(FLAC__CPUInfo *info)
//@@@@@@ http://www.codeproject.com/cpp/gccasm.asp
//@@@@@@ http://www.hick.org/~mmiller/msvc_inline_asm.html
__asm {
# if _MSC_VER <= 1200
/* VC6 assembler doesn't know SSE, have to emit bytecode instead */
_emit 0x0F
_emit 0x57
_emit 0xC0
# else
xorps xmm0,xmm0
# endif
inc sse
nop
nop