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Diffstat (limited to 'libgcc/config/loongarch/crtfastmath.c')
-rw-r--r-- | libgcc/config/loongarch/crtfastmath.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/libgcc/config/loongarch/crtfastmath.c b/libgcc/config/loongarch/crtfastmath.c new file mode 100644 index 00000000000..52b0d6da087 --- /dev/null +++ b/libgcc/config/loongarch/crtfastmath.c @@ -0,0 +1,52 @@ +/* Copyright (C) 2021-2022 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 */ |