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author | Xiaolin Tang <tangxiaolin@loongson.cn> | 2022-11-07 22:05:16 +0800 |
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committer | caiyinyu <caiyinyu@loongson.cn> | 2022-11-14 10:02:41 +0800 |
commit | 5fe2647d3168194f3534bbf1c02930c891a25977 (patch) | |
tree | f06eb4d10315e86e87335375d2f18b68e40ac9aa /sysdeps/loongarch/fpu/s_issignaling.c | |
parent | 56da6a073daaf86a7044df22b8778e913db5099c (diff) | |
download | glibc-5fe2647d3168194f3534bbf1c02930c891a25977.tar.gz glibc-5fe2647d3168194f3534bbf1c02930c891a25977.tar.xz glibc-5fe2647d3168194f3534bbf1c02930c891a25977.zip |
LoongArch: Hard Float Support for float-point classification functions.
Use hardware Floating-point instruction fclass.{s/d} to implement classification functions, i.e finite{f/ }, fpclassify{f/ }, isnan{f/ }, isinf{f/ }, issignaling{f/ }. * sysdeps/loongarch/fpu/s_finite.c: New file. * sysdeps/loongarch/fpu/s_finitef.c: Likewise. * sysdeps/loongarch/fpu/s_fpclassify.c: Likewise. * sysdeps/loongarch/fpu/s_fpclassifyf.c: Likewise. * sysdeps/loongarch/fpu/s_isinf.c: Likewise. * sysdeps/loongarch/fpu/s_isinff.c: Likewise. * sysdeps/loongarch/fpu/s_isnan.c: Likewise. * sysdeps/loongarch/fpu/s_isnanf.c: Likewise. * sysdeps/loongarch/fpu/s_issignaling.c: Likewise. * sysdeps/loongarch/fpu/s_issignalingf.c: Likewise. * sysdeps/loongarch/fpu_control.h: Add _FCLASS_* macro.
Diffstat (limited to 'sysdeps/loongarch/fpu/s_issignaling.c')
-rw-r--r-- | sysdeps/loongarch/fpu/s_issignaling.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/sysdeps/loongarch/fpu/s_issignaling.c b/sysdeps/loongarch/fpu/s_issignaling.c new file mode 100644 index 0000000000..4fe0e2b7a9 --- /dev/null +++ b/sysdeps/loongarch/fpu/s_issignaling.c @@ -0,0 +1,29 @@ +/* issignaling(). LoongArch version. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#include <math.h> +#include <fenv_private.h> + +int +__issignaling (double x) +{ + int x_cond; + asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x)); + return (x_cond & _FCLASS_SNAN) != 0; +} +libm_hidden_def (__issignaling) |