diff options
Diffstat (limited to 'thirdparty/astcenc/astcenc_vecmathlib_none_4.h')
| -rw-r--r-- | thirdparty/astcenc/astcenc_vecmathlib_none_4.h | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/thirdparty/astcenc/astcenc_vecmathlib_none_4.h b/thirdparty/astcenc/astcenc_vecmathlib_none_4.h index 1c95c2ff88..be7348eff1 100644 --- a/thirdparty/astcenc/astcenc_vecmathlib_none_4.h +++ b/thirdparty/astcenc/astcenc_vecmathlib_none_4.h @@ -1,6 +1,6 @@ // SPDX-License-Identifier: Apache-2.0 // ---------------------------------------------------------------------------- -// Copyright 2019-2023 Arm Limited +// Copyright 2019-2024 Arm Limited // // Licensed under the Apache License, Version 2.0 (the "License"); you may not // use this file except in compliance with the License. You may obtain a copy @@ -556,10 +556,16 @@ ASTCENC_SIMD_INLINE vmask4 operator>(vint4 a, vint4 b) */ template <int s> ASTCENC_SIMD_INLINE vint4 lsl(vint4 a) { - return vint4(a.m[0] << s, - a.m[1] << s, - a.m[2] << s, - a.m[3] << s); + // Cast to unsigned to avoid shift in/out of sign bit undefined behavior + unsigned int as0 = static_cast<unsigned int>(a.m[0]) << s; + unsigned int as1 = static_cast<unsigned int>(a.m[1]) << s; + unsigned int as2 = static_cast<unsigned int>(a.m[2]) << s; + unsigned int as3 = static_cast<unsigned int>(a.m[3]) << s; + + return vint4(static_cast<int>(as0), + static_cast<int>(as1), + static_cast<int>(as2), + static_cast<int>(as3)); } /** @@ -567,6 +573,7 @@ template <int s> ASTCENC_SIMD_INLINE vint4 lsl(vint4 a) */ template <int s> ASTCENC_SIMD_INLINE vint4 lsr(vint4 a) { + // Cast to unsigned to avoid shift in/out of sign bit undefined behavior unsigned int as0 = static_cast<unsigned int>(a.m[0]) >> s; unsigned int as1 = static_cast<unsigned int>(a.m[1]) >> s; unsigned int as2 = static_cast<unsigned int>(a.m[2]) >> s; |