1 /* Copyright (C) 1998-2021 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library. If not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _FENV_H 19 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." 20 #endif 21 22 23 #ifdef __mips_hard_float 24 25 /* Define bits representing the exception. We use the bit positions 26 of the appropriate bits in the FPU control word. */ 27 enum 28 { 29 FE_INEXACT = 30 # define FE_INEXACT 0x04 31 FE_INEXACT, 32 FE_UNDERFLOW = 33 # define FE_UNDERFLOW 0x08 34 FE_UNDERFLOW, 35 FE_OVERFLOW = 36 # define FE_OVERFLOW 0x10 37 FE_OVERFLOW, 38 FE_DIVBYZERO = 39 # define FE_DIVBYZERO 0x20 40 FE_DIVBYZERO, 41 FE_INVALID = 42 # define FE_INVALID 0x40 43 FE_INVALID, 44 }; 45 46 # define FE_ALL_EXCEPT \ 47 (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) 48 49 /* The MIPS FPU supports all of the four defined rounding modes. We 50 use again the bit positions in the FPU control word as the values 51 for the appropriate macros. */ 52 enum 53 { 54 FE_TONEAREST = 55 # define FE_TONEAREST 0x0 56 FE_TONEAREST, 57 FE_TOWARDZERO = 58 # define FE_TOWARDZERO 0x1 59 FE_TOWARDZERO, 60 FE_UPWARD = 61 # define FE_UPWARD 0x2 62 FE_UPWARD, 63 FE_DOWNWARD = 64 # define FE_DOWNWARD 0x3 65 FE_DOWNWARD 66 }; 67 68 #else 69 70 /* In the soft-float case, only rounding to nearest is supported, with 71 no exceptions. */ 72 73 enum 74 { 75 __FE_UNDEFINED = -1, 76 77 FE_TONEAREST = 78 # define FE_TONEAREST 0x0 79 FE_TONEAREST 80 }; 81 82 # define FE_ALL_EXCEPT 0 83 84 #endif 85 86 87 /* Type representing exception flags. */ 88 typedef unsigned short int fexcept_t; 89 90 91 /* Type representing floating-point environment. This function corresponds 92 to the layout of the block written by the `fstenv'. */ 93 typedef struct 94 { 95 unsigned int __fp_control_register; 96 } 97 fenv_t; 98 99 /* If the default argument is used we use this value. */ 100 #define FE_DFL_ENV ((const fenv_t *) -1) 101 102 #if defined __USE_GNU && defined __mips_hard_float 103 /* Floating-point environment where none of the exception is masked. */ 104 # define FE_NOMASK_ENV ((const fenv_t *) -2) 105 #endif 106 107 #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) 108 /* Type representing floating-point control modes. */ 109 typedef unsigned int femode_t; 110 111 /* Default floating-point control modes. */ 112 # define FE_DFL_MODE ((const femode_t *) -1L) 113 #endif 114