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/_types.h> 35 36 #ifndef __fenv_static 37 #define __fenv_static static 38 #endif 39 40 typedef int fenv_t; 41 typedef int fexcept_t; 42 43 /* Exception flags */ 44 #ifdef __mips_soft_float 45 #define _FPUSW_SHIFT 16 46 #define FE_INVALID 0x0001 47 #define FE_DIVBYZERO 0x0002 48 #define FE_OVERFLOW 0x0004 49 #define FE_UNDERFLOW 0x0008 50 #define FE_INEXACT 0x0010 51 #else 52 #define _FCSR_CAUSE_SHIFT 10 53 #define FE_INVALID 0x0040 54 #define FE_DIVBYZERO 0x0020 55 #define FE_OVERFLOW 0x0010 56 #define FE_UNDERFLOW 0x0008 57 #define FE_INEXACT 0x0004 58 #endif 59 #define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \ 60 FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW) 61 62 /* Rounding modes */ 63 #define FE_TONEAREST 0x0000 64 #define FE_TOWARDZERO 0x0001 65 #define FE_UPWARD 0x0002 66 #define FE_DOWNWARD 0x0003 67 #define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \ 68 FE_UPWARD | FE_TOWARDZERO) 69 70 71 /* Default floating-point environment */ 72 extern fenv_t _fe_dfl_env; 73 #define FE_DFL_ENV ((const fenv_t *) &_fe_dfl_env) 74 75 /* We need to be able to map status flag positions to mask flag positions */ 76 #define _ENABLE_SHIFT 5 77 #define _ENABLE_MASK (FE_ALL_EXCEPT << _ENABLE_SHIFT) 78 79 #if !defined(__mips_soft_float) && !defined(__mips_hard_float) 80 #error compiler didnt set soft/hard float macros 81 #endif 82 83 #ifndef __mips_soft_float 84 #define __cfc1(__fcsr) __asm __volatile("cfc1 %0, $31" : "=r" (__fcsr)) 85 #define __ctc1(__fcsr) __asm __volatile("ctc1 %0, $31" :: "r" (__fcsr)) 86 #endif 87 88 #endif /* !_FENV_H_ */ 89
