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Avoid out-of-bounds reads from blas_quick_divide_table on big systems

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Martin Kroeker 2018-04-29 14:38:55 +02:00 committed by GitHub
parent 26ce518d46
commit 8145ecd70b
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1 changed files with 4 additions and 0 deletions
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common_x86.h
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@ -179,6 +179,10 @@ static __inline int blas_quickdivide(unsigned int x, unsigned int y){
return result; return result;
#else #else
if ( y > 64) {
result = x/y;
return result;
}
y = blas_quick_divide_table[y]; y = blas_quick_divide_table[y];
__asm__ __volatile__ ("mull %0" :"=d" (result) :"a"(x), "0" (y)); __asm__ __volatile__ ("mull %0" :"=d" (result) :"a"(x), "0" (y));