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| author | Xi Ruoyao <xry111@xry111.site> | 2023-02-14 16:57:13 +0800 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-02-27 08:18:49 -0300 |
| commit | aa4b45a34687595d37539feb367b0c691e41362b (patch) | |
| tree | 21bd8ace6617e546e4cb903f330296ff7d006460 | |
| parent | 7999b8a3aa76eae4f75b76fd6797e832274b8114 (diff) | |
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LoongArch: Add math-barriers.h
This patch implements the LoongArch specific math barriers in order to omit
the store and load from stack if possible.
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
| -rw-r--r-- | sysdeps/loongarch/fpu/math-barriers.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/sysdeps/loongarch/fpu/math-barriers.h b/sysdeps/loongarch/fpu/math-barriers.h new file mode 100644 index 0000000000..3e977e43a6 --- /dev/null +++ b/sysdeps/loongarch/fpu/math-barriers.h @@ -0,0 +1,28 @@ +/* Control when floating-point expressions are evaluated. LoongArch version. + Copyright (C) 2023 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/>. */ + +#ifndef _LOONGARCH_MATH_BARRIERS_H +#define _LOONGARCH_MATH_BARRIERS_H 1 + +/* Generic code forces values to memory; we don't need to do that. */ +#define math_opt_barrier(x) \ + ({ __typeof (x) __x = (x); __asm ("" : "+frm" (__x)); __x; }) +#define math_force_eval(x) \ + ({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "frm" (__x)); }) + +#endif /* math-barriers.h */ |