| /* Copyright (C) 2021-2023 Free Software Foundation, Inc. |
| Contributed by Loongson Ltd. |
| Based on MIPS target for GNU compiler. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| GCC 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 General Public |
| License for more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License |
| and a copy of the GCC Runtime Library Exception along with this |
| program; see the files COPYING3 and COPYING.RUNTIME respectively. |
| If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifdef __loongarch_hard_float |
| |
| /* Rounding control. */ |
| #define _FPU_RC_NEAREST 0x000 /* RECOMMENDED. */ |
| #define _FPU_RC_ZERO 0x100 |
| #define _FPU_RC_UP 0x200 |
| #define _FPU_RC_DOWN 0x300 |
| |
| /* Enable interrupts for IEEE exceptions. */ |
| #define _FPU_IEEE 0x0000001F |
| |
| /* Macros for accessing the hardware control word. */ |
| #define _FPU_GETCW(cw) __asm__ volatile ("movfcsr2gr %0,$r0" : "=r" (cw)) |
| #define _FPU_SETCW(cw) __asm__ volatile ("movgr2fcsr $r0,%0" : : "r" (cw)) |
| |
| static void __attribute__((constructor)) |
| set_fast_math (void) |
| { |
| unsigned int fcr; |
| |
| /* Flush to zero, round to nearest, IEEE exceptions disabled. */ |
| fcr = _FPU_RC_NEAREST; |
| |
| _FPU_SETCW (fcr); |
| } |
| |
| #endif /* __loongarch_hard_float */ |
