Mercurial > hg > CbC > CbC_gcc
view gcc/config/mips/crtfastmath.c @ 68:561a7518be6b
update gcc-4.6
author | Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Sun, 21 Aug 2011 07:07:55 +0900 |
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/* Copyright (C) 2010 Free Software Foundation, Inc. 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 __mips_hard_float /* Flush denormalized numbers to zero. */ #define _FPU_FLUSH_TZ 0x1000000 /* Rounding control. */ #define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ #define _FPU_RC_ZERO 0x1 #define _FPU_RC_UP 0x2 #define _FPU_RC_DOWN 0x3 /* Enable interrupts for IEEE exceptions. */ #define _FPU_IEEE 0x00000F80 /* Macros for accessing the hardware control word. */ #define _FPU_GETCW(cw) __asm__ ("cfc1 %0,$31" : "=r" (cw)) #define _FPU_SETCW(cw) __asm__ ("ctc1 %0,$31" : : "r" (cw)) static void __attribute__((constructor)) set_fast_math (void) { unsigned int fcr; /* Flush to zero, round to nearest, IEEE exceptions disabled. */ fcr = _FPU_FLUSH_TZ | _FPU_RC_NEAREST; _FPU_SETCW(fcr); } #endif /* __mips_hard_float */