1 /*- 2 * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> 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 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/lib/msun/arm/fenv.h,v 1.5 2005/03/16 19:03:45 das Exp $ 27 */ 28 29 /* 30 * Rewritten for Android. 31 * 32 * The ARM FPSCR is described here: 33 * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0344b/Chdfafia.html 34 */ 35 36 #ifndef _FENV_H_ 37 #define _FENV_H_ 38 39 #include <sys/types.h> 40 41 __BEGIN_DECLS 42 43 /* 44 * arm/mips definition 45 */ 46 typedef __uint32_t fenv_t; 47 typedef __uint32_t fexcept_t; 48 49 /* 50 * x86 definition 51 */ 52 /* 53 typedef struct { 54 __uint16_t __control; 55 __uint16_t __mxcsr_hi; 56 __uint16_t __status; 57 __uint16_t __mxcsr_lo; 58 __uint32_t __tag; 59 char __other[16]; 60 } fenv_t; 61 */ 62 63 64 /* Exception flags. */ 65 #define FE_INVALID 0x01 66 #define FE_DIVBYZERO 0x02 67 #define FE_OVERFLOW 0x04 68 #define FE_UNDERFLOW 0x08 69 #define FE_INEXACT 0x10 70 #define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW) 71 72 /* Rounding modes. */ 73 #define FE_TONEAREST 0x0 74 #define FE_UPWARD 0x1 75 #define FE_DOWNWARD 0x2 76 #define FE_TOWARDZERO 0x3 77 78 /* Default floating-point environment. */ 79 extern const fenv_t __fe_dfl_env; 80 #define FE_DFL_ENV (&__fe_dfl_env) 81 82 /* 83 * Need implementations in libportable to enable following functions 84 * 85 * int fegetenv(fenv_t* __envp); 86 * int fesetenv(const fenv_t* __envp); 87 * int feholdexcept(fenv_t* __envp); 88 * int feupdateenv(const fenv_t* __envp); 89 */ 90 91 int feclearexcept(int __excepts); 92 int fegetexceptflag(fexcept_t* __flagp, int __excepts); 93 int fesetexceptflag(const fexcept_t* __flagp, int __excepts); 94 int feraiseexcept(int __excepts); 95 int fetestexcept(int __excepts); 96 int fegetround(void); 97 int fesetround(int __round); 98 99 __END_DECLS 100 101 #endif /* !_FENV_H_ */ 102