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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2025-04-21 17:25:43 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2025-04-25 17:46:05 -0300 |
| commit | b79b2ffdd8cf68fe81b9176441c9a13dcbdb0504 (patch) | |
| tree | fe6010cbb7c424446f5a40b3bce081b5507cd3bc | |
| parent | 1f2345d1ae1b9e216289ddf17ed69278c1f473a9 (diff) | |
| download | glibc-b79b2ffdd8cf68fe81b9176441c9a13dcbdb0504.tar.xz glibc-b79b2ffdd8cf68fe81b9176441c9a13dcbdb0504.zip | |
math: Fix UB on erfcf
The left shift overflows for 'int', use uint64_t instead. It syncs
with CORE-MATH commit d0a2be200cbc1344d800d9ef0ebee9ad67dd3ad8.
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_erfcf.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sysdeps/ieee754/flt-32/s_erfcf.c b/sysdeps/ieee754/flt-32/s_erfcf.c index 3dae2a0b0e..955f129148 100644 --- a/sysdeps/ieee754/flt-32/s_erfcf.c +++ b/sysdeps/ieee754/flt-32/s_erfcf.c @@ -3,7 +3,7 @@ Copyright (c) 2023, 2024 Alexei Sibidanov. This file is part of the CORE-MATH project -project (file src/binary32/erfc/erfcf.c revision bc385c2). +project (file src/binary32/erfc/erfcf.c revision d0a2be20). Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal @@ -142,7 +142,7 @@ __erfcf (float xf) const double ln2l = 0x1.cf79abd6f5dc8p-47; uint64_t jt = asuint64 (fma (x2, iln2, -(1024 + 0x1p-8))); int64_t j = (int64_t) (jt << 12) >> 48; - double S = asdouble (((j >> 7) + (0x3ff | sgn << 11)) << 52); + double S = asdouble ((uint64_t)((j >> 7) + (0x3ff | sgn << 11)) << 52); static const double ch[] = { -0x1.ffffffffff333p-2, 0x1.5555555556a14p-3, -0x1.55556666659b4p-5, |