| ieeefp.h (126891) | ieeefp.h (143063) |
|---|---|
| 1/*- 2 * Copyright (c) 1990 Andrew Moore, Talke Studio 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#) ieeefp.h 1.0 (Berkeley) 9/23/93 | 1/*- 2 * Copyright (c) 1990 Andrew Moore, Talke Studio 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#) ieeefp.h 1.0 (Berkeley) 9/23/93 |
| 34 * $FreeBSD: head/sys/i386/include/ieeefp.h 126891 2004-03-12 21:45:33Z trhodes $ | 34 * $FreeBSD: head/sys/i386/include/ieeefp.h 143063 2005-03-02 21:33:29Z joerg $ |
| 35 */ 36 37/* 38 * IEEE floating point type and constant definitions. 39 */ 40 41#ifndef _MACHINE_IEEEFP_H_ 42#define _MACHINE_IEEEFP_H_ 43 | 35 */ 36 37/* 38 * IEEE floating point type and constant definitions. 39 */ 40 41#ifndef _MACHINE_IEEEFP_H_ 42#define _MACHINE_IEEEFP_H_ 43 |
| 44#ifndef _SYS_CDEFS_H_ 45#error this file needs sys/cdefs.h as a prerequisite 46#endif 47 |
|
| 44/* 45 * FP rounding modes 46 */ 47typedef enum { 48 FP_RN=0, /* round to nearest */ 49 FP_RM, /* round down to minus infinity */ 50 FP_RP, /* round up to plus infinity */ 51 FP_RZ /* truncate */ --- 41 unchanged lines hidden (view full) --- 93/* 94 * FP register bit field offsets 95 */ 96#define FP_MSKS_OFF 0 /* exception masks offset */ 97#define FP_PRC_OFF 8 /* precision control offset */ 98#define FP_RND_OFF 10 /* round control offset */ 99#define FP_STKY_OFF 0 /* sticky flags offset */ 100 | 48/* 49 * FP rounding modes 50 */ 51typedef enum { 52 FP_RN=0, /* round to nearest */ 53 FP_RM, /* round down to minus infinity */ 54 FP_RP, /* round up to plus infinity */ 55 FP_RZ /* truncate */ --- 41 unchanged lines hidden (view full) --- 97/* 98 * FP register bit field offsets 99 */ 100#define FP_MSKS_OFF 0 /* exception masks offset */ 101#define FP_PRC_OFF 8 /* precision control offset */ 102#define FP_RND_OFF 10 /* round control offset */ 103#define FP_STKY_OFF 0 /* sticky flags offset */ 104 |
| 101#if defined(__GNUC__) || defined(__INTEL_COMPILER) | 105#ifdef __GNUCLIKE_ASM |
| 102 103#define __fldenv(addr) __asm __volatile("fldenv %0" : : "m" (*(addr))) 104#define __fnstenv(addr) __asm __volatile("fnstenv %0" : "=m" (*(addr))) 105#define __fnstcw(addr) __asm __volatile("fnstcw %0" : "=m" (*(addr))) 106#define __fnstsw(addr) __asm __volatile("fnstsw %0" : "=m" (*(addr))) 107 108/* 109 * return the contents of a FP register --- 36 unchanged lines hidden (view full) --- 146 */ 147 __fnstenv(_env); 148 _p = (_env[_reg] & _fld) >> _off; 149 _env[_reg] = (_env[_reg] & ~_fld) | (_m << _off & _fld); 150 __fldenv(_env); 151 return _p; 152} 153 | 106 107#define __fldenv(addr) __asm __volatile("fldenv %0" : : "m" (*(addr))) 108#define __fnstenv(addr) __asm __volatile("fnstenv %0" : "=m" (*(addr))) 109#define __fnstcw(addr) __asm __volatile("fnstcw %0" : "=m" (*(addr))) 110#define __fnstsw(addr) __asm __volatile("fnstsw %0" : "=m" (*(addr))) 111 112/* 113 * return the contents of a FP register --- 36 unchanged lines hidden (view full) --- 150 */ 151 __fnstenv(_env); 152 _p = (_env[_reg] & _fld) >> _off; 153 _env[_reg] = (_env[_reg] & ~_fld) | (_m << _off & _fld); 154 __fldenv(_env); 155 return _p; 156} 157 |
| 154#endif /* __GNUC__ || __INTEL_COMPILER */ | 158#endif /* __GNUCLIKE_ASM */ |
| 155 156/* 157 * SysV/386 FP control interface 158 */ 159#define fpgetround() ((fp_rnd_t) \ 160 ((__fpgetreg(FP_RND_REG) & FP_RND_FLD) >> FP_RND_OFF)) 161#define fpsetround(m) ((fp_rnd_t) \ 162 __fpsetreg((m), FP_RND_REG, FP_RND_FLD, FP_RND_OFF)) --- 19 unchanged lines hidden --- | 159 160/* 161 * SysV/386 FP control interface 162 */ 163#define fpgetround() ((fp_rnd_t) \ 164 ((__fpgetreg(FP_RND_REG) & FP_RND_FLD) >> FP_RND_OFF)) 165#define fpsetround(m) ((fp_rnd_t) \ 166 __fpsetreg((m), FP_RND_REG, FP_RND_FLD, FP_RND_OFF)) --- 19 unchanged lines hidden --- |