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make blas_quickdivide unsigned and guard against miscompilation

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This commit is contained in:
Martin Kroeker
2020-06-05 10:03:36 +02:00
committed by GitHub
parent 0f9a935a5a
commit 0464e662ad
1 changed files with 3 additions and 4 deletions
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7
common_x86_64.h
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@@ -80,7 +80,7 @@ static void __inline blas_lock(volatile BLASULONG *address){
#endif
do {
while (*address) {YIELDING;};
while (*address) {YIELDING;}
#ifndef C_MSVC
__asm__ __volatile__(
@@ -199,9 +199,9 @@ static __inline BLASLONG blas_quickdivide(BLASLONG x, BLASLONG y){
#else
extern unsigned int blas_quick_divide_table[];
static __inline int blas_quickdivide(unsigned int x, unsigned int y){
static __inline unsigned int blas_quickdivide(unsigned int x, unsigned int y){
unsigned int result;
volatile unsigned int result;
if (y <= 1) return x;
@@ -215,7 +215,6 @@ static __inline int blas_quickdivide(unsigned int x, unsigned int y){
y = blas_quick_divide_table[y];
__asm__ __volatile__ ("mull %0" :"=d" (result), "+a"(x) : "0" (y));
return result;
}
#endif