| /* FPU control word bits. RISC-V version. |
| Copyright (C) 1996-2018 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _FPU_CONTROL_H |
| #define _FPU_CONTROL_H |
| |
| #include <features.h> |
| |
| #ifndef __riscv_flen |
| |
| # define _FPU_RESERVED 0xffffffff |
| # define _FPU_DEFAULT 0x00000000 |
| typedef unsigned int fpu_control_t; |
| # define _FPU_GETCW(cw) (cw) = 0 |
| # define _FPU_SETCW(cw) do { } while (0) |
| extern fpu_control_t __fpu_control; |
| |
| #else /* __riscv_flen */ |
| |
| # define _FPU_RESERVED 0 |
| # define _FPU_DEFAULT 0 |
| # define _FPU_IEEE _FPU_DEFAULT |
| |
| /* Type of the control word. */ |
| typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__))); |
| |
| /* Macros for accessing the hardware control word. */ |
| # define _FPU_GETCW(cw) __asm__ volatile ("frsr %0" : "=r" (cw)) |
| # define _FPU_SETCW(cw) __asm__ volatile ("fssr %z0" : : "rJ" (cw)) |
| |
| /* Default control word set at startup. */ |
| extern fpu_control_t __fpu_control; |
| |
| # define _FCLASS(x) (__extension__ ({ int __res; \ |
| if (sizeof (x) * 8 > __riscv_flen) __builtin_trap (); \ |
| if (sizeof (x) == 4) asm ("fclass.s %0, %1" : "=r" (__res) : "f" (x)); \ |
| else if (sizeof (x) == 8) asm ("fclass.d %0, %1" : "=r" (__res) : "f" (x)); \ |
| else __builtin_trap (); \ |
| __res; })) |
| |
| # define _FCLASS_MINF (1 << 0) |
| # define _FCLASS_MNORM (1 << 1) |
| # define _FCLASS_MSUBNORM (1 << 2) |
| # define _FCLASS_MZERO (1 << 3) |
| # define _FCLASS_PZERO (1 << 4) |
| # define _FCLASS_PSUBNORM (1 << 5) |
| # define _FCLASS_PNORM (1 << 6) |
| # define _FCLASS_PINF (1 << 7) |
| # define _FCLASS_SNAN (1 << 8) |
| # define _FCLASS_QNAN (1 << 9) |
| # define _FCLASS_ZERO (_FCLASS_MZERO | _FCLASS_PZERO) |
| # define _FCLASS_SUBNORM (_FCLASS_MSUBNORM | _FCLASS_PSUBNORM) |
| # define _FCLASS_NORM (_FCLASS_MNORM | _FCLASS_PNORM) |
| # define _FCLASS_INF (_FCLASS_MINF | _FCLASS_PINF) |
| # define _FCLASS_NAN (_FCLASS_SNAN | _FCLASS_QNAN) |
| |
| #endif /* __riscv_flen */ |
| |
| #endif /* fpu_control.h */ |
