single.h (3930B)
1/* Software floating-point emulation. 2 Definitions for IEEE Single Precision. 3 Copyright (C) 1997,1998,1999 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 Contributed by Richard Henderson (rth@cygnus.com), 6 Jakub Jelinek (jj@ultra.linux.cz), 7 David S. Miller (davem@redhat.com) and 8 Peter Maydell (pmaydell@chiark.greenend.org.uk). 9 10 The GNU C Library is free software; you can redistribute it and/or 11 modify it under the terms of the GNU Library General Public License as 12 published by the Free Software Foundation; either version 2 of the 13 License, or (at your option) any later version. 14 15 The GNU C Library is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 Library General Public License for more details. 19 20 You should have received a copy of the GNU Library General Public 21 License along with the GNU C Library; see the file COPYING.LIB. If 22 not, write to the Free Software Foundation, Inc., 23 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 24 25#ifndef __MATH_EMU_SINGLE_H__ 26#define __MATH_EMU_SINGLE_H__ 27 28#if _FP_W_TYPE_SIZE < 32 29#error "Here's a nickel kid. Go buy yourself a real computer." 30#endif 31 32#define _FP_FRACBITS_S 24 33#define _FP_FRACXBITS_S (_FP_W_TYPE_SIZE - _FP_FRACBITS_S) 34#define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S) 35#define _FP_WFRACXBITS_S (_FP_W_TYPE_SIZE - _FP_WFRACBITS_S) 36#define _FP_EXPBITS_S 8 37#define _FP_EXPBIAS_S 127 38#define _FP_EXPMAX_S 255 39#define _FP_QNANBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2)) 40#define _FP_IMPLBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1)) 41#define _FP_OVERFLOW_S ((_FP_W_TYPE)1 << (_FP_WFRACBITS_S)) 42 43/* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be 44 chosen by the target machine. */ 45 46union _FP_UNION_S 47{ 48 float flt; 49 struct { 50#if __BYTE_ORDER == __BIG_ENDIAN 51 unsigned sign : 1; 52 unsigned exp : _FP_EXPBITS_S; 53 unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); 54#else 55 unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0); 56 unsigned exp : _FP_EXPBITS_S; 57 unsigned sign : 1; 58#endif 59 } bits __attribute__((packed)); 60}; 61 62#define FP_DECL_S(X) _FP_DECL(1,X) 63#define FP_UNPACK_RAW_S(X,val) _FP_UNPACK_RAW_1(S,X,val) 64#define FP_UNPACK_RAW_SP(X,val) _FP_UNPACK_RAW_1_P(S,X,val) 65#define FP_PACK_RAW_S(val,X) _FP_PACK_RAW_1(S,val,X) 66#define FP_PACK_RAW_SP(val,X) \ 67 do { \ 68 if (!FP_INHIBIT_RESULTS) \ 69 _FP_PACK_RAW_1_P(S,val,X); \ 70 } while (0) 71 72#define FP_UNPACK_S(X,val) \ 73 do { \ 74 _FP_UNPACK_RAW_1(S,X,val); \ 75 _FP_UNPACK_CANONICAL(S,1,X); \ 76 } while (0) 77 78#define FP_UNPACK_SP(X,val) \ 79 do { \ 80 _FP_UNPACK_RAW_1_P(S,X,val); \ 81 _FP_UNPACK_CANONICAL(S,1,X); \ 82 } while (0) 83 84#define FP_PACK_S(val,X) \ 85 do { \ 86 _FP_PACK_CANONICAL(S,1,X); \ 87 _FP_PACK_RAW_1(S,val,X); \ 88 } while (0) 89 90#define FP_PACK_SP(val,X) \ 91 do { \ 92 _FP_PACK_CANONICAL(S,1,X); \ 93 if (!FP_INHIBIT_RESULTS) \ 94 _FP_PACK_RAW_1_P(S,val,X); \ 95 } while (0) 96 97#define FP_ISSIGNAN_S(X) _FP_ISSIGNAN(S,1,X) 98#define FP_NEG_S(R,X) _FP_NEG(S,1,R,X) 99#define FP_ADD_S(R,X,Y) _FP_ADD(S,1,R,X,Y) 100#define FP_SUB_S(R,X,Y) _FP_SUB(S,1,R,X,Y) 101#define FP_MUL_S(R,X,Y) _FP_MUL(S,1,R,X,Y) 102#define FP_DIV_S(R,X,Y) _FP_DIV(S,1,R,X,Y) 103#define FP_SQRT_S(R,X) _FP_SQRT(S,1,R,X) 104#define _FP_SQRT_MEAT_S(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q) 105 106#define FP_CMP_S(r,X,Y,un) _FP_CMP(S,1,r,X,Y,un) 107#define FP_CMP_EQ_S(r,X,Y) _FP_CMP_EQ(S,1,r,X,Y) 108 109#define FP_TO_INT_S(r,X,rsz,rsg) _FP_TO_INT(S,1,r,X,rsz,rsg) 110#define FP_TO_INT_ROUND_S(r,X,rsz,rsg) _FP_TO_INT_ROUND(S,1,r,X,rsz,rsg) 111#define FP_FROM_INT_S(X,r,rs,rt) _FP_FROM_INT(S,1,X,r,rs,rt) 112 113#define _FP_FRAC_HIGH_S(X) _FP_FRAC_HIGH_1(X) 114#define _FP_FRAC_HIGH_RAW_S(X) _FP_FRAC_HIGH_1(X) 115 116#endif /* __MATH_EMU_SINGLE_H__ */