math: Fix UB on dbl-64 rint

UBSAN: Undefined behaviour in ../sysdeps/ieee754/dbl-64/s_rint.c:53:4 left shift of 1 by 63 cannot be represented in type 'long long int'
2025-05-06 13:38:31 +00:00 · 2025-05-06 13:38:31 +00:00 · ae54df4654
parent 48557d36a0
commit ae54df4654
1 changed files with 2 additions and 1 deletions
--- a/sysdeps/ieee754/dbl-64/s_rint.c
+++ b/sysdeps/ieee754/dbl-64/s_rint.c
@ -37,7 +37,8 @@ __rint (double x)
 		4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
 		-4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
  };
-  int64_t i0, sx;
+  int64_t i0;
+  uint64_t sx;
  int32_t j0;
  EXTRACT_WORDS64 (i0, x);
  sx = (i0 >> 63) & 1;