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Fix bug #566: rbx register has to be saved when calling cpuid on x84_64 with -fPIC and medium or large code models.

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Michael Schmidt 2013-03-19 14:00:42 +01:00
parent d6d638c751
commit 0d5a418048
1 changed files with 5 additions and 1 deletions
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6
Eigen/src/Core/util/Memory.h
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@ -752,10 +752,14 @@ public:
// 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));
# elif defined(__PIC__) && defined(__x86_64__)
// Case for x64 with PIC
# define EIGEN_CPUID(abcd,func,id) \
__asm__ __volatile__ ("xchg{q}\t{%%}rbx, %q1; cpuid; xchg{q}\t{%%}rbx, %q1": "=a" (abcd[0]), "=&r" (abcd[1]), "=c" (abcd[2]), "=d" (abcd[3]) : "0" (func), "2" (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) );
__asm__ __volatile__ ("cpuid": "=a" (abcd[0]), "=b" (abcd[1]), "=c" (abcd[2]), "=d" (abcd[3]) : "0" (func), "2" (id) );
# endif
# elif defined(_MSC_VER)
# if (_MSC_VER > 1500) && ( defined(_M_IX86) || defined(_M_X64) )