diff options
Diffstat (limited to 'winsup/cygwin/cpuid.h')
| -rw-r--r-- | winsup/cygwin/cpuid.h | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/winsup/cygwin/cpuid.h b/winsup/cygwin/cpuid.h index 998bbbf91..ff353227e 100644 --- a/winsup/cygwin/cpuid.h +++ b/winsup/cygwin/cpuid.h @@ -12,10 +12,31 @@ cpuid (unsigned *a, unsigned *b, unsigned *c, unsigned *d, unsigned in) : "a" (in)); } +#ifdef __x86_64__ extern inline bool -can_set_flag (unsigned flag) +can_set_flag (register unsigned long flag) { - unsigned r1, r2; + register unsigned long r1, r2; + asm("pushfq\n" + "popq %0\n" + "movq %0, %1\n" + "xorq %2, %0\n" + "pushq %0\n" + "popfq\n" + "pushfq\n" + "popq %0\n" + "pushq %1\n" + "popfq\n" + : "=&r" (r1), "=&r" (r2) + : "ir" (flag) + ); + return ((r1 ^ r2) & flag) != 0; +} +#else +extern inline bool +can_set_flag (register unsigned flag) +{ + register unsigned r1, r2; asm("pushfl\n" "popl %0\n" "movl %0, %1\n" @@ -31,5 +52,6 @@ can_set_flag (unsigned flag) ); return ((r1 ^ r2) & flag) != 0; } +#endif #endif // !CPUID_H |