Avoid out of bounds reads from blas_quick_divide_table on big systems

Should fix #1541
2018-04-29 14:34:33 +02:00 · 2018-04-29 14:34:33 +02:00 · 26ce518d46
parent 0ab5bf1746
commit 26ce518d46
1 changed files with 3 additions and 1 deletions
--- a/common_x86_64.h
+++ b/common_x86_64.h
@ -195,7 +195,9 @@ static __inline int blas_quickdivide(unsigned int x, unsigned int y){
  unsigned int result;

  if (y <= 1) return x;
-
+  
+  if (y > 64) return x/y;
+	
  y = blas_quick_divide_table[y];

  __asm__ __volatile__  ("mull %0" :"=d" (result) :"a"(x), "0" (y));