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author | caiyinyu <caiyinyu@loongson.cn> | 2022-07-19 09:20:48 +0800 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-07-26 12:35:12 -0300 |
commit | c742795dce9706ba3b26b649a7123a379bd506cb (patch) | |
tree | 0ef7059c1fdd72397cfa3c1024d8a2c22053c41e /sysdeps/loongarch/bits/fenv.h | |
parent | 619bfc6770275da9deceb87187f47ab95b3b24cc (diff) | |
download | glibc-c742795dce9706ba3b26b649a7123a379bd506cb.tar.gz glibc-c742795dce9706ba3b26b649a7123a379bd506cb.tar.xz glibc-c742795dce9706ba3b26b649a7123a379bd506cb.zip |
LoongArch: Generic <math.h> and soft-fp Routines
Diffstat (limited to 'sysdeps/loongarch/bits/fenv.h')
-rw-r--r-- | sysdeps/loongarch/bits/fenv.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/sysdeps/loongarch/bits/fenv.h b/sysdeps/loongarch/bits/fenv.h new file mode 100644 index 0000000000..7e223b402b --- /dev/null +++ b/sysdeps/loongarch/bits/fenv.h @@ -0,0 +1,90 @@ +/* Floating point environment. + 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/>. */ + +#ifndef _FENV_H +#error "Never use <bits/fenv.h> directly; include <fenv.h> instead." +#endif + +/* Define bits representing the exception. We use the bit positions + of the appropriate bits in the FPU control word. */ +enum +{ + FE_INEXACT = +#define FE_INEXACT 0x010000 + FE_INEXACT, + FE_UNDERFLOW = +#define FE_UNDERFLOW 0x020000 + FE_UNDERFLOW, + FE_OVERFLOW = +#define FE_OVERFLOW 0x040000 + FE_OVERFLOW, + FE_DIVBYZERO = +#define FE_DIVBYZERO 0x080000 + FE_DIVBYZERO, + FE_INVALID = +#define FE_INVALID 0x100000 + FE_INVALID, +}; + +#define FE_ALL_EXCEPT \ + (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) + +/* The LoongArch FPU supports all of the four defined rounding modes. We + use again the bit positions in the FPU control word as the values + for the appropriate macros. */ +enum +{ + FE_TONEAREST = +#define FE_TONEAREST 0x000 + FE_TONEAREST, + FE_TOWARDZERO = +#define FE_TOWARDZERO 0x100 + FE_TOWARDZERO, + FE_UPWARD = +#define FE_UPWARD 0x200 + FE_UPWARD, + FE_DOWNWARD = +#define FE_DOWNWARD 0x300 + FE_DOWNWARD +}; + +/* Type representing exception flags. */ +typedef unsigned int fexcept_t; + +/* Type representing floating-point environment. This function corresponds + to the layout of the block written by the `fstenv'. */ +typedef struct +{ + unsigned int __fp_control_register; +} fenv_t; + +/* If the default argument is used we use this value. */ +#define FE_DFL_ENV ((const fenv_t *) -1) + +#ifdef __USE_GNU +/* Floating-point environment where none of the exception is masked. */ +#define FE_NOMASK_ENV ((const fenv_t *) -257) +#endif + +#if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) +/* Type representing floating-point control modes. */ +typedef unsigned int femode_t; + +/* Default floating-point control modes. */ +#define FE_DFL_MODE ((const femode_t *) -1L) +#endif |