[Bug target/35195] New: Strange effect of -msse5/-mno-sse5

[hjl dot tools at gmail dot com]

bash-3.2$ cat y.c
#include <stdio.h>

int
main ()
{
#ifdef __MMX__
  printf ("MMX\n");
#endif
#ifdef __3dNOW__
  printf ("3dNOW\n");
#endif
#ifdef __3dNOW_A__
  printf ("3dNOW_A\n");
#endif
}
bash-3.2$ /usr/gcc-4.3/bin/gcc -march=k8 -msse5 y.c && ./a.out 
MMX
3dNOW
3dNOW_A
bash-3.2$ /usr/gcc-4.3/bin/gcc -march=k8 -mno-sse5 y.c && ./a.out
MMX
bash-3.2$ 

Why does -mno-sse5 turn off 3dNOW and 3dNOW_A?


-- 
           Summary: Strange effect of -msse5/-mno-sse5
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35195