1/* 2 * IEEE754 floating point 3 * double precision internal header file 4 */ 5/* 6 * MIPS floating point support 7 * Copyright (C) 1994-2000 Algorithmics Ltd. 8 * http://www.algor.co.uk 9 * 10 * ######################################################################## 11 * 12 * This program is free software; you can distribute it and/or modify it 13 * under the terms of the GNU General Public License (Version 2) as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope it will be useful, but WITHOUT 17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 19 * for more details. 20 * 21 * You should have received a copy of the GNU General Public License along 22 * with this program; if not, write to the Free Software Foundation, Inc., 23 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. 24 * 25 * ######################################################################## 26 */ 27 28 29#include "ieee754int.h" 30 31#define assert(expr) ((void)0) 32 33/* 3bit extended double precision sticky right shift */ 34#define XDPSRS(v,rs) \ 35 ((rs > (DP_MBITS+3))?1:((v) >> (rs)) | ((v) << (64-(rs)) != 0)) 36 37#define XDPSRSX1() \ 38 (xe++, (xm = (xm >> 1) | (xm & 1))) 39 40#define XDPSRS1(v) \ 41 (((v) >> 1) | ((v) & 1)) 42 43/* convert denormal to normalized with extended exponent */ 44#define DPDNORMx(m,e) \ 45 while( (m >> DP_MBITS) == 0) { m <<= 1; e--; } 46#define DPDNORMX DPDNORMx(xm,xe) 47#define DPDNORMY DPDNORMx(ym,ye) 48 49static __inline ieee754dp builddp(int s, int bx, u64 m) 50{ 51 ieee754dp r; 52 53 assert((s) == 0 || (s) == 1); 54 assert((bx) >= DP_EMIN - 1 + DP_EBIAS 55 && (bx) <= DP_EMAX + 1 + DP_EBIAS); 56 assert(((m) >> DP_MBITS) == 0); 57 58 r.parts.sign = s; 59 r.parts.bexp = bx; 60 r.parts.mant = m; 61 return r; 62} 63 64extern int ieee754dp_isnan(ieee754dp); 65extern int ieee754dp_issnan(ieee754dp); 66extern int ieee754si_xcpt(int, const char *, ...); 67extern s64 ieee754di_xcpt(s64, const char *, ...); 68extern ieee754dp ieee754dp_xcpt(ieee754dp, const char *, ...); 69extern ieee754dp ieee754dp_nanxcpt(ieee754dp, const char *, ...); 70extern ieee754dp ieee754dp_bestnan(ieee754dp, ieee754dp); 71extern ieee754dp ieee754dp_format(int, int, u64); 72 73 74#define DPNORMRET2(s,e,m,name,a0,a1) \ 75{ \ 76 ieee754dp V = ieee754dp_format(s,e,m); \ 77 if(TSTX()) \ 78 return ieee754dp_xcpt(V,name,a0,a1); \ 79 else \ 80 return V; \ 81} 82 83#define DPNORMRET1(s,e,m,name,a0) DPNORMRET2(s,e,m,name,a0,a0) 84