http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55712
Leif Ekblad <leif at rdos dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #29038|0 |1
is obsolete| |
--- Comment #3 from Leif Ekblad <leif at rdos dot net> 2012-12-23 22:49:53 UTC
---
Comment on attachment 29038
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29038
Save rbx and use another file for ebx parameter to cpuid
>diff -crNB gcc-4.8-20121216/gcc/config/i386/cpuid.h
>gcc-work/gcc/config/i386/cpuid.h
>*** gcc-4.8-20121216/gcc/config/i386/cpuid.h 2012-10-26 11:45:46.000000000
>+0200
>--- gcc-work/gcc/config/i386/cpuid.h 2012-12-23 23:06:08.000000000 +0100
>***************
>*** 166,171 ****
>--- 166,189 ----
> : "0" (level), "2" (count))
> #endif
> #else
>+
>+ #if defined(__x86_64__) && defined(__PIC__)
>+ #define __cpuid(level, a, b, c, d) \
>+ __asm__ ("pushq %%rbx\n\t" \
>+ "cpuid\n\t" \
>+ "movl %%ebx, %1\n\t" \
>+ "popq %%rbx\n\t" \
>+ : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
>+ : "0" (level))
>+
>+ #define __cpuid_count(level, count, a, b, c, d) \
>+ __asm__ ("pushq %%rbx\n\t" \
>+ "cpuid\n\t" \
>+ "movl %%ebx, %1\n\t" \
>+ "popq %%rbx\n\t" \
>+ : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
>+ : "0" (level), "2" (count))
>+ #else
> #define __cpuid(level, a, b, c, d) \
> __asm__ ("cpuid\n\t" \
> : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
>***************
>*** 176,181 ****
>--- 194,200 ----
> : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
> : "0" (level), "2" (count))
> #endif
>+ #endif
>
> /* Return highest supported input value for cpuid instruction. ext can
> be either 0x0 or 0x8000000 to return highest supported value for
