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