关于__asm__ __volatile ( )的问题
__asm__ __volatile ( " <—–L 241
pushl %%ebx
pushfl
popl %%eax
movl %%eax, %%ebx
xorl $0x200000, %%eax
pushl %%eax
popfl
pushfl
popl %%eax
xorl %%ebx, %%eax
andl $0x200000, %%eax
jz jumphere
xorl %%eax, %%eax
cpuid
or %%eax, %%eax
jz jumphere
movl $1, %%eax
cpuid
movl %%eax, %%ecx
andl $0xf00, %%ecx
shrl $8, %%ecx
movl %%ecx, %0
movl %%eax, %%ecx
andl $0xf0, %%ecx
shrl $4, %%ecx
movl %%ecx, %1
movl %%eax, %%ecx
andl $0x0f, %%ecx
movl %%ecx, %2
movl %%edx, %%eax
andl $0x800000, %%eax
jz jumphere
mov $1, %%eax
mov %%eax, %3
movl %%edx, %%eax
and $0x2000000, %%eax
mov %%eax, %4
movl %%edx, %%eax
and $0x4000000, %%eax
mov %%eax, %5
jumphere:
popl %%ebx
" <——-L 284
: "=m " (family), "=m " (model), "=m " (stepping), "=m " (has_mmx), "=m " (has_kni), "=m
关于_asm_ _volatile ( )的有关问题
