From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Tue, 6 May 2025 13:43:36 +0000 (+0000)
Subject: math: Fix UB in flt-32 nearbyint
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0a933c9bf75088406677d72da03604669361e0d4;p=thirdparty%2Fglibc.git

math: Fix UB in flt-32 nearbyint

UBSAN: Undefined behaviour in ../sysdeps/ieee754/flt-32/s_nearbyintf.c:53:4 left shift of 1 by 31 cannot be represented in type 'int'
---

diff --git a/sysdeps/ieee754/flt-32/s_nearbyintf.c b/sysdeps/ieee754/flt-32/s_nearbyintf.c
index 5dd0e8f8af..8ae80738fc 100644
--- a/sysdeps/ieee754/flt-32/s_nearbyintf.c
+++ b/sysdeps/ieee754/flt-32/s_nearbyintf.c
@@ -34,7 +34,8 @@ __nearbyintf (float x)
 		-8.3886080000e+06, /* 0xcb000000 */
   };
   fenv_t env;
-  int32_t i0, j0, sx;
+  int32_t i0, j0;
+  uint32_t sx;
   float w, t;
   GET_FLOAT_WORD (i0, x);
   sx = (i0 >> 31) & 1;