1 /* Copyright (C) 2010-2018 Free Software Foundation, Inc. 2 3 This file is part of GCC. 4 5 GCC is free software; you can redistribute it and/or modify it 6 under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3, or (at your option) 8 any later version. 9 10 GCC is distributed in the hope that it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 12 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 13 License for more details. 14 15 Under Section 7 of GPL version 3, you are granted additional 16 permissions described in the GCC Runtime Library Exception, version 17 3.1, as published by the Free Software Foundation. 18 19 You should have received a copy of the GNU General Public License 20 and a copy of the GCC Runtime Library Exception along with this 21 program; see the files COPYING3 and COPYING.RUNTIME respectively. 22 If not, see <http://www.gnu.org/licenses/>. */ 23 24 #ifdef __mips_hard_float 25 26 /* Flush denormalized numbers to zero. */ 27 #define _FPU_FLUSH_TZ 0x1000000 28 29 /* Rounding control. */ 30 #define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ 31 #define _FPU_RC_ZERO 0x1 32 #define _FPU_RC_UP 0x2 33 #define _FPU_RC_DOWN 0x3 34 35 /* Enable interrupts for IEEE exceptions. */ 36 #define _FPU_IEEE 0x00000F80 37 38 /* Macros for accessing the hardware control word. */ 39 #define _FPU_GETCW(cw) __asm__ ("cfc1 %0,$31" : "=r" (cw)) 40 #define _FPU_SETCW(cw) __asm__ ("ctc1 %0,$31" : : "r" (cw)) 41 42 static void __attribute__((constructor,nomips16)) 43 set_fast_math (void) 44 { 45 unsigned int fcr; 46 47 /* Flush to zero, round to nearest, IEEE exceptions disabled. */ 48 fcr = _FPU_FLUSH_TZ | _FPU_RC_NEAREST; 49 50 _FPU_SETCW(fcr); 51 } 52 53 #endif /* __mips_hard_float */ 54