1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright (c) 1994-1997, by Sun Microsystems, Inc. 24*7c478bd9Sstevel@tonic-gate * All rights reserved. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*7c478bd9Sstevel@tonic-gate 29*7c478bd9Sstevel@tonic-gate #include "quad.h" 30*7c478bd9Sstevel@tonic-gate 31*7c478bd9Sstevel@tonic-gate #ifdef __sparcv9 32*7c478bd9Sstevel@tonic-gate 33*7c478bd9Sstevel@tonic-gate /* 34*7c478bd9Sstevel@tonic-gate * _Qp_dtoq(pz, x) sets *pz = (long double)x. 35*7c478bd9Sstevel@tonic-gate */ 36*7c478bd9Sstevel@tonic-gate void 37*7c478bd9Sstevel@tonic-gate _Qp_dtoq(union longdouble *pz, double x) 38*7c478bd9Sstevel@tonic-gate 39*7c478bd9Sstevel@tonic-gate #else 40*7c478bd9Sstevel@tonic-gate 41*7c478bd9Sstevel@tonic-gate /* 42*7c478bd9Sstevel@tonic-gate * _Q_dtoq(x) returns (long double)x. 43*7c478bd9Sstevel@tonic-gate */ 44*7c478bd9Sstevel@tonic-gate union longdouble 45*7c478bd9Sstevel@tonic-gate _Q_dtoq(double x) 46*7c478bd9Sstevel@tonic-gate 47*7c478bd9Sstevel@tonic-gate #endif /* __sparcv9 */ 48*7c478bd9Sstevel@tonic-gate 49*7c478bd9Sstevel@tonic-gate { 50*7c478bd9Sstevel@tonic-gate #ifndef __sparcv9 51*7c478bd9Sstevel@tonic-gate union longdouble z; 52*7c478bd9Sstevel@tonic-gate #endif 53*7c478bd9Sstevel@tonic-gate union xdouble u; 54*7c478bd9Sstevel@tonic-gate unsigned int m, lhi, llo, fsr; 55*7c478bd9Sstevel@tonic-gate 56*7c478bd9Sstevel@tonic-gate /* extract the exponent */ 57*7c478bd9Sstevel@tonic-gate u.d = x; 58*7c478bd9Sstevel@tonic-gate m = ((u.l.hi & 0x7ff00000) >> 4) + 0x3c000000; 59*7c478bd9Sstevel@tonic-gate if (m == 0x3c000000) { 60*7c478bd9Sstevel@tonic-gate /* x is zero or denormal */ 61*7c478bd9Sstevel@tonic-gate if ((u.l.hi & 0xfffff) | u.l.lo) { 62*7c478bd9Sstevel@tonic-gate /* x is denormal, normalize it */ 63*7c478bd9Sstevel@tonic-gate m = 0x3c010000; 64*7c478bd9Sstevel@tonic-gate lhi = u.l.hi & 0xfffff; 65*7c478bd9Sstevel@tonic-gate llo = u.l.lo; 66*7c478bd9Sstevel@tonic-gate do { 67*7c478bd9Sstevel@tonic-gate lhi = (lhi << 1) | (llo >> 31); 68*7c478bd9Sstevel@tonic-gate llo <<= 1; 69*7c478bd9Sstevel@tonic-gate m -= 0x10000; 70*7c478bd9Sstevel@tonic-gate } while ((lhi & 0x7ff00000) == 0); 71*7c478bd9Sstevel@tonic-gate u.l.hi = (u.l.hi & 0x80000000) | lhi; 72*7c478bd9Sstevel@tonic-gate u.l.lo = llo; 73*7c478bd9Sstevel@tonic-gate } else { 74*7c478bd9Sstevel@tonic-gate m = 0; 75*7c478bd9Sstevel@tonic-gate } 76*7c478bd9Sstevel@tonic-gate } else if (m == 0x43ff0000) { 77*7c478bd9Sstevel@tonic-gate /* x is inf or nan */ 78*7c478bd9Sstevel@tonic-gate m = 0x7fff0000; 79*7c478bd9Sstevel@tonic-gate if (((u.l.hi & 0x7ffff) | u.l.lo) && (u.l.hi & 0x80000) == 0) { 80*7c478bd9Sstevel@tonic-gate /* snan, signal invalid */ 81*7c478bd9Sstevel@tonic-gate __quad_getfsrp(&fsr); 82*7c478bd9Sstevel@tonic-gate if (fsr & FSR_NVM) { 83*7c478bd9Sstevel@tonic-gate __quad_fdtoq(&x, &Z); 84*7c478bd9Sstevel@tonic-gate QUAD_RETURN(Z); 85*7c478bd9Sstevel@tonic-gate } else { 86*7c478bd9Sstevel@tonic-gate fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC; 87*7c478bd9Sstevel@tonic-gate __quad_setfsrp(&fsr); 88*7c478bd9Sstevel@tonic-gate } 89*7c478bd9Sstevel@tonic-gate u.l.hi |= 0x80000; 90*7c478bd9Sstevel@tonic-gate } 91*7c478bd9Sstevel@tonic-gate } 92*7c478bd9Sstevel@tonic-gate Z.l.msw = m | (u.l.hi & 0x80000000) | ((u.l.hi & 0xffff0) >> 4); 93*7c478bd9Sstevel@tonic-gate Z.l.frac2 = (u.l.hi << 28) | (u.l.lo >> 4); 94*7c478bd9Sstevel@tonic-gate Z.l.frac3 = u.l.lo << 28; 95*7c478bd9Sstevel@tonic-gate Z.l.frac4 = 0; 96*7c478bd9Sstevel@tonic-gate QUAD_RETURN(Z); 97*7c478bd9Sstevel@tonic-gate } 98