/* * IEEE754 floating point * double precision internal header file */ /* * MIPS floating point support * Copyright (C) 1994-2000 Algorithmics Ltd. * * ######################################################################## * * This program is free software; you can distribute it and/or modify it * under the terms of the GNU General Public License (Version 2) as * published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. * * ######################################################################## */ #include <linux/compiler.h> #include "ieee754int.h" #define assert(expr) ((void)0) /* 3bit extended double precision sticky right shift */ #define XDPSRS(v,rs) \ ((rs > (DP_FBITS+3))?1:((v) >> (rs)) | ((v) << (64-(rs)) != 0)) #define XDPSRSX1() \ (xe++, (xm = (xm >> 1) | (xm & 1))) #define XDPSRS1(v) \ (((v) >> 1) | ((v) & 1)) /* convert denormal to normalized with extended exponent */ #define DPDNORMx(m,e) \ while ((m >> DP_FBITS) == 0) { m <<= 1; e--; } #define DPDNORMX DPDNORMx(xm, xe) #define DPDNORMY DPDNORMx(ym, ye) static inline union ieee754dp builddp(int s, int bx, u64 m) { union ieee754dp r; assert((s) == 0 || (s) == 1); assert((bx) >= DP_EMIN - 1 + DP_EBIAS && (bx) <= DP_EMAX + 1 + DP_EBIAS); assert(((m) >> DP_FBITS) == 0); r.parts.sign = s; r.parts.bexp = bx; r.parts.mant = m; return r; } extern int ieee754dp_isnan(union ieee754dp); extern int ieee754dp_issnan(union ieee754dp); extern int __cold ieee754si_xcpt(int, const char *, ...); extern s64 __cold ieee754di_xcpt(s64, const char *, ...); extern union ieee754dp __cold ieee754dp_xcpt(union ieee754dp, const char *, ...); extern union ieee754dp __cold ieee754dp_nanxcpt(union ieee754dp, const char *, ...); extern union ieee754dp ieee754dp_bestnan(union ieee754dp, union ieee754dp); extern union ieee754dp ieee754dp_format(int, int, u64); #define DPNORMRET2(s, e, m, name, a0, a1) \ { \ union ieee754dp V = ieee754dp_format(s, e, m); \ if (ieee754_tstx()) \ return ieee754dp_xcpt(V, name, a0, a1); \ else \ return V; \ } #define DPNORMRET1(s, e, m, name, a0) DPNORMRET2(s, e, m, name, a0, a0)