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/* 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 */
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