summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat (limited to 'app-benchmarks/i7z/files/fix_cpuid_asm.patch')
-rw-r--r--app-benchmarks/i7z/files/fix_cpuid_asm.patch21
1 files changed, 21 insertions, 0 deletions
diff --git a/app-benchmarks/i7z/files/fix_cpuid_asm.patch b/app-benchmarks/i7z/files/fix_cpuid_asm.patch
new file mode 100644
index 00000000000..27739a64523
--- /dev/null
+++ b/app-benchmarks/i7z/files/fix_cpuid_asm.patch
@@ -0,0 +1,21 @@
+Author: Andreas Beckmann <anbe@debian.org>
+Description: fix cpuid inline assembly
+ the old code zeroed the upper half of %rbx
+
+--- a/helper_functions.c
++++ b/helper_functions.c
+@@ -101,13 +101,7 @@ static inline void cpuid (unsigned int i
+ unsigned int *ecx, unsigned int *edx)
+ {
+ unsigned int _eax = info, _ebx, _ecx, _edx;
+- asm volatile ("mov %%ebx, %%edi;" // save ebx (for PIC)
+- "cpuid;"
+- "mov %%ebx, %%esi;" // pass to caller
+- "mov %%edi, %%ebx;" // restore ebx
+- :"+a" (_eax), "=S" (_ebx), "=c" (_ecx), "=d" (_edx)
+- : /* inputs: eax is handled above */
+- :"edi" /* clobbers: we hit edi directly */);
++ asm volatile ("cpuid\n\t" : "+a" (_eax), "=b" (_ebx), "=c" (_ecx), "=d" (_edx) : : );
+ if (eax) *eax = _eax;
+ if (ebx) *ebx = _ebx;
+ if (ecx) *ecx = _ecx;