54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/* Copyright (C) 2010-2019 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License
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and a copy of the GCC Runtime Library Exception along with this
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program; see the files COPYING3 and COPYING.RUNTIME respectively.
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If not, see <http://www.gnu.org/licenses/>. */
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#ifdef __mips_hard_float
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/* Flush denormalized numbers to zero. */
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#define _FPU_FLUSH_TZ 0x1000000
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/* Rounding control. */
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#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */
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#define _FPU_RC_ZERO 0x1
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#define _FPU_RC_UP 0x2
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#define _FPU_RC_DOWN 0x3
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/* Enable interrupts for IEEE exceptions. */
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#define _FPU_IEEE 0x00000F80
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/* Macros for accessing the hardware control word. */
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#define _FPU_GETCW(cw) __asm__ ("cfc1 %0,$31" : "=r" (cw))
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#define _FPU_SETCW(cw) __asm__ ("ctc1 %0,$31" : : "r" (cw))
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static void __attribute__((constructor,nomips16))
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set_fast_math (void)
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{
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unsigned int fcr;
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/* Flush to zero, round to nearest, IEEE exceptions disabled. */
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fcr = _FPU_FLUSH_TZ | _FPU_RC_NEAREST;
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_FPU_SETCW(fcr);
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}
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#endif /* __mips_hard_float */
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