/* FPU control word bits. SPARC version. Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Miguel de Icaza The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _FPU_CONTROL_H #define _FPU_CONTROL_H 1 #include <features.h> #include <bits/wordsize.h> /* masking of interrupts */ #define _FPU_MASK_IM 0x08000000 #define _FPU_MASK_OM 0x04000000 #define _FPU_MASK_UM 0x02000000 #define _FPU_MASK_ZM 0x01000000 #define _FPU_MASK_PM 0x00800000 /* precision control */ #define _FPU_EXTENDED 0x00000000 /* RECOMMENDED */ #define _FPU_DOUBLE 0x20000000 #define _FPU_80BIT 0x30000000 #define _FPU_SINGLE 0x10000000 /* DO NOT USE */ /* rounding control / Sparc */ #define _FPU_RC_DOWN 0xc0000000 #define _FPU_RC_UP 0x80000000 #define _FPU_RC_ZERO 0x40000000 #define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ #define _FPU_RESERVED 0x30300000 /* Reserved bits in cw */ /* Now two recommended cw */ /* Linux and IEEE default: - extended precision - rounding to nearest - no exceptions */ #define _FPU_DEFAULT 0x0 #define _FPU_IEEE 0x0 /* Type of the control word. */ typedef unsigned long int fpu_control_t; #if __WORDSIZE == 64 # define _FPU_GETCW(cw) __asm__ ("stx %%fsr,%0" : "=m" (*&cw)) # define _FPU_SETCW(cw) __asm__ ("ldx %0,%%fsr" : : "m" (*&cw)) #else # define _FPU_GETCW(cw) __asm__ ("st %%fsr,%0" : "=m" (*&cw)) # define _FPU_SETCW(cw) __asm__ ("ld %0,%%fsr" : : "m" (*&cw)) #endif #if 0 /* Default control word set at startup. */ extern fpu_control_t __fpu_control; #endif #endif /* fpu_control.h */