diff options
| author | jan.nijtmans <nijtmans@users.sourceforge.net> | 2012-05-02 21:39:10 (GMT) |
|---|---|---|
| committer | jan.nijtmans <nijtmans@users.sourceforge.net> | 2012-05-02 21:39:10 (GMT) |
| commit | b01b765d7b57559048e606b7a01156a807b26b9c (patch) | |
| tree | 8835c59d6164b82f15ea847bacc04e7a074b666c /unix/configure.in | |
| parent | fc2fcb8cf98f705a260551269c44f3c2ea80bc6c (diff) | |
| parent | 99557b6c57a524f31c81cde6d39cc2a5e51983f3 (diff) | |
| download | tcl-b01b765d7b57559048e606b7a01156a807b26b9c.zip tcl-b01b765d7b57559048e606b7a01156a807b26b9c.tar.gz tcl-b01b765d7b57559048e606b7a01156a807b26b9c.tar.bz2 | |
Better detection and implementation for cpuid instruction on Intel-derived processors, both 32-bit and 64-bit
Diffstat (limited to 'unix/configure.in')
| -rw-r--r-- | unix/configure.in | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/unix/configure.in b/unix/configure.in index c04c735..869fbaa 100644 --- a/unix/configure.in +++ b/unix/configure.in @@ -571,12 +571,16 @@ AC_MSG_RESULT([$tcl_ok]) AC_CACHE_CHECK([whether the cpuid instruction is usable], tcl_cv_cpuid, [ AC_TRY_LINK(, [ - int index,ax,bx,cx,dx; - __asm__ __volatile__ ("cpuid":\ - "=a" (ax), "=b" (bx), "=c" (cx), "=d" (dx) : "a" (index)); + int index,regsPtr[4]; + __asm__ __volatile__("mov %%ebx, %%edi \n\t" + "cpuid \n\t" + "mov %%ebx, %%esi \n\t" + "mov %%edi, %%ebx \n\t" + : "=a"(regsPtr[0]), "=S"(regsPtr[1]), "=c"(regsPtr[2]), "=d"(regsPtr[3]) + : "a"(index)); ], tcl_cv_cpuid=yes, tcl_cv_cpuid=no)]) if test $tcl_cv_cpuid = yes; then - AC_DEFINE(HAVE_CPUID) + AC_DEFINE(HAVE_CPUID, 1, [Is the cpuid instruction usable?]) fi #-------------------------------------------------------------------- |