1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _SYS_FENV_H_ 32 #define _SYS_FENV_H_ 33 34 #include <sys/cdefs.h> 35 36 #if !defined(__mips_soft_float) && !defined(__mips_hard_float) 37 #error compiler didnt set soft/hard float macros 38 #endif 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 typedef int fenv_t; 45 typedef int fexcept_t; 46 47 #ifndef __mips_soft_float 48 49 /* Exception flags */ 50 #define _FCSR_CAUSE_SHIFT 10 51 #define FE_INVALID 0x0040 52 #define FE_DIVBYZERO 0x0020 53 #define FE_OVERFLOW 0x0010 54 #define FE_UNDERFLOW 0x0008 55 #define FE_INEXACT 0x0004 56 #define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \ 57 FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW) 58 59 /* Rounding modes */ 60 #define FE_TONEAREST 0x0000 61 #define FE_TOWARDZERO 0x0001 62 #define FE_UPWARD 0x0002 63 #define FE_DOWNWARD 0x0003 64 #define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \ 65 FE_UPWARD | FE_TOWARDZERO) 66 67 /* Default floating-point environment */ 68 extern fenv_t _fe_dfl_env; 69 #define FE_DFL_ENV ((const fenv_t *) &_fe_dfl_env) 70 71 /* We need to be able to map status flag positions to mask flag positions */ 72 #define _FCSR_ENABLE_SHIFT 5 73 #define _FCSR_ENABLE_MASK (FE_ALL_EXCEPT << _FCSR_ENABLE_SHIFT) 74 75 #define __cfc1(__fcsr) __asm __volatile("cfc1 %0, $31" : "=r" (__fcsr)) 76 #define __ctc1(__fcsr) __asm __volatile("ctc1 %0, $31" :: "r" (__fcsr)) 77 78 #endif /* !__mips_soft_float */ 79 80 #if !defined(__declare_fenv_inline) && defined(__declare_extern_inline) 81 #define __declare_fenv_inline(type) __declare_extern_inline(type) 82 #endif 83 84 #ifdef __declare_fenv_inline 85 #ifdef __mips_soft_float 86 #include <machine/fenv-softfloat.h> 87 #else 88 #include <machine/fenv-fp.h> 89 #endif 90 #endif 91 92 #ifdef __cplusplus 93 } 94 #endif 95 96 #endif /* !_FENV_H_ */ 97
