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Update of CPUID macros to fix segfaults in amd64 code.

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This commit is contained in:
Jose Luis Blanco 2011-01-05 02:43:43 +01:00
parent 98f0274305
commit cbfab7204f
1 changed files with 3 additions and 1 deletions
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4
Eigen/src/Core/util/Memory.h
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@ -598,10 +598,12 @@ public:
//---------- Cache sizes ----------
#if defined(__GNUC__) && ( defined(__i386__) || defined(__x86_64__) )
# if defined(__PIC__)
# if defined(__PIC__) && defined(__i386__)
// Case for x86 with PIC
# define EIGEN_CPUID(abcd,func,id) \
__asm__ __volatile__ ("xchgl %%ebx, %%esi;cpuid; xchgl %%ebx,%%esi": "=a" (abcd[0]), "=S" (abcd[1]), "=c" (abcd[2]), "=d" (abcd[3]) : "a" (func), "c" (id));
# else
// Case for x86_64 or x86 w/o PIC
# define EIGEN_CPUID(abcd,func,id) \
__asm__ __volatile__ ("cpuid": "=a" (abcd[0]), "=b" (abcd[1]), "=c" (abcd[2]), "=d" (abcd[3]) : "a" (func), "c" (id) );
# endif