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author | Xiaolin Tang <tangxiaolin@loongson.cn> | 2022-11-23 11:49:26 +0800 |
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committer | caiyinyu <caiyinyu@loongson.cn> | 2022-11-29 16:00:29 +0800 |
commit | 885d340f20aab989482b8a1f844a224a1656d52c (patch) | |
tree | 7d06920353461ba7b0a0054df7d7fab0fa8d81cc /sysdeps/loongarch/fpu | |
parent | d3366b6b87d0b178dca1cc88f964f1140fdd872c (diff) | |
download | glibc-885d340f20aab989482b8a1f844a224a1656d52c.tar.gz glibc-885d340f20aab989482b8a1f844a224a1656d52c.tar.xz glibc-885d340f20aab989482b8a1f844a224a1656d52c.zip |
LoongArch: Add support for ilogb[f]
Add inline assembler for the ilogb functions. Passes GLIBC regression.
Diffstat (limited to 'sysdeps/loongarch/fpu')
-rw-r--r-- | sysdeps/loongarch/fpu/e_ilogb.c | 39 | ||||
-rw-r--r-- | sysdeps/loongarch/fpu/e_ilogbf.c | 39 |
2 files changed, 78 insertions, 0 deletions
diff --git a/sysdeps/loongarch/fpu/e_ilogb.c b/sysdeps/loongarch/fpu/e_ilogb.c new file mode 100644 index 0000000000..f9ada6921a --- /dev/null +++ b/sysdeps/loongarch/fpu/e_ilogb.c @@ -0,0 +1,39 @@ +/* __ieee754_ilogb(). 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/>. */ + +#define NO_MATH_REDIRECT +#include <math.h> +#include <fpu_control.h> + +int +__ieee754_ilogb (double x) +{ + int x_cond; + asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x)); + + if (__glibc_unlikely (x_cond & _FCLASS_ZERO)) + return FP_ILOGB0; + else if (__glibc_unlikely (x_cond & ( _FCLASS_NAN | _FCLASS_INF))) + return FP_ILOGBNAN; + else + { + asm volatile ("fabs.d \t%0, %1" : "=f" (x) : "f" (x)); + asm volatile ("flogb.d \t%0, %1" : "=f" (x) : "f" (x)); + return x; + } +} diff --git a/sysdeps/loongarch/fpu/e_ilogbf.c b/sysdeps/loongarch/fpu/e_ilogbf.c new file mode 100644 index 0000000000..e1da48ecfc --- /dev/null +++ b/sysdeps/loongarch/fpu/e_ilogbf.c @@ -0,0 +1,39 @@ +/* __ieee754_ilogbf(). 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/>. */ + +#define NO_MATH_REDIRECT +#include <math.h> +#include <fpu_control.h> + +int +__ieee754_ilogbf (float x) +{ + int x_cond; + asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x)); + + if (__glibc_unlikely (x_cond & _FCLASS_ZERO)) + return FP_ILOGB0; + else if (__glibc_unlikely (x_cond & ( _FCLASS_NAN | _FCLASS_INF))) + return FP_ILOGBNAN; + else + { + asm volatile ("fabs.s \t%0, %1" : "=f" (x) : "f" (x)); + asm volatile ("flogb.s \t%0, %1" : "=f" (x) : "f" (x)); + return x; + } +} |