Warning: This file is not a C or C++ file. It does not have highlighting.
| 1 | /* FPU control word bits. RISC-V version. |
|---|---|
| 2 | Copyright (C) 1996-2022 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library. If not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _FPU_CONTROL_H |
| 20 | #define _FPU_CONTROL_H |
| 21 | |
| 22 | #include <features.h> |
| 23 | |
| 24 | #ifndef __riscv_flen |
| 25 | |
| 26 | # define _FPU_RESERVED 0xffffffff |
| 27 | # define _FPU_DEFAULT 0x00000000 |
| 28 | typedef unsigned int fpu_control_t; |
| 29 | # define _FPU_GETCW(cw) (cw) = 0 |
| 30 | # define _FPU_SETCW(cw) do { } while (0) |
| 31 | extern fpu_control_t __fpu_control; |
| 32 | |
| 33 | #else /* __riscv_flen */ |
| 34 | |
| 35 | # define _FPU_RESERVED 0 |
| 36 | # define _FPU_DEFAULT 0 |
| 37 | # define _FPU_IEEE _FPU_DEFAULT |
| 38 | |
| 39 | /* Type of the control word. */ |
| 40 | typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__))); |
| 41 | |
| 42 | /* Macros for accessing the hardware control word. */ |
| 43 | # define _FPU_GETCW(cw) __asm__ volatile ("frsr %0" : "=r" (cw)) |
| 44 | # define _FPU_SETCW(cw) __asm__ volatile ("fssr %z0" : : "rJ" (cw)) |
| 45 | |
| 46 | /* Default control word set at startup. */ |
| 47 | extern fpu_control_t __fpu_control; |
| 48 | |
| 49 | # define _FCLASS(x) (__extension__ ({ int __res; \ |
| 50 | if (sizeof (x) * 8 > __riscv_flen) __builtin_trap (); \ |
| 51 | if (sizeof (x) == 4) asm ("fclass.s %0, %1" : "=r" (__res) : "f" (x)); \ |
| 52 | else if (sizeof (x) == 8) asm ("fclass.d %0, %1" : "=r" (__res) : "f" (x)); \ |
| 53 | else __builtin_trap (); \ |
| 54 | __res; })) |
| 55 | |
| 56 | # define _FCLASS_MINF (1 << 0) |
| 57 | # define _FCLASS_MNORM (1 << 1) |
| 58 | # define _FCLASS_MSUBNORM (1 << 2) |
| 59 | # define _FCLASS_MZERO (1 << 3) |
| 60 | # define _FCLASS_PZERO (1 << 4) |
| 61 | # define _FCLASS_PSUBNORM (1 << 5) |
| 62 | # define _FCLASS_PNORM (1 << 6) |
| 63 | # define _FCLASS_PINF (1 << 7) |
| 64 | # define _FCLASS_SNAN (1 << 8) |
| 65 | # define _FCLASS_QNAN (1 << 9) |
| 66 | # define _FCLASS_ZERO (_FCLASS_MZERO | _FCLASS_PZERO) |
| 67 | # define _FCLASS_SUBNORM (_FCLASS_MSUBNORM | _FCLASS_PSUBNORM) |
| 68 | # define _FCLASS_NORM (_FCLASS_MNORM | _FCLASS_PNORM) |
| 69 | # define _FCLASS_INF (_FCLASS_MINF | _FCLASS_PINF) |
| 70 | # define _FCLASS_NAN (_FCLASS_SNAN | _FCLASS_QNAN) |
| 71 | |
| 72 | #endif /* __riscv_flen */ |
| 73 | |
| 74 | #endif /* fpu_control.h */ |
| 75 |
Warning: This file is not a C or C++ file. It does not have highlighting.