Add builtin_expect to predict that CPU supports cpuid to cpuid.h

[thirdparty/gcc.git] / gcc / config / i386 / cpuid.h

diff --git a/gcc/config/i386/cpuid.h b/gcc/config/i386/cpuid.h
index 03fd6fc9478e8ef87d0f7191b9f80539e9c3e939..73c15480350adfe86a055ecaa2f8c581623e9a78 100644 (file)
--- a/gcc/config/i386/cpuid.h
+++ b/gcc/config/i386/cpuid.h
@@ -295,7 +295,7 @@ __get_cpuid_max (unsigned int __ext, unsigned int *__sig)
           : "i" (0x00200000));
 #endif
 
-  if (!((__eax ^ __ebx) & 0x00200000))
+  if (__builtin_expect (!((__eax ^ __ebx) & 0x00200000), 0))
     return 0;
 #endif
 
@@ -338,7 +338,7 @@ __get_cpuid_count (unsigned int __leaf, unsigned int __subleaf,
   unsigned int __ext = __leaf & 0x80000000;
   unsigned int __maxlevel = __get_cpuid_max (__ext, 0);
 
-  if (__maxlevel == 0 || __maxlevel < __leaf)
+  if (__builtin_expect (__maxlevel == 0, 0) || __maxlevel < __leaf)
     return 0;
 
   __cpuid_count (__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx);