1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1994-1997, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "quad.h" 30 31 /* 32 * _Qp_qtox(x) returns (long)*x. 33 */ 34 long 35 _Qp_qtox(const union longdouble *x) 36 { 37 long i, round; 38 unsigned int xm, fsr; 39 40 xm = x->l.msw & 0x7fffffff; 41 42 __quad_getfsrp(&fsr); 43 44 /* handle nan, inf, and out-of-range cases */ 45 if (xm >= 0x403e0000) { 46 if (x->l.msw == 0xc03e0000 && x->l.frac2 == 0 && 47 (x->l.frac3 & 0xfffe0000) == 0) { 48 /* return largest negative 64 bit int */ 49 i = 0x8000000000000000ul; 50 if ((x->l.frac3 & 0x1ffff) | x->l.frac4) { 51 /* signal inexact */ 52 if (fsr & FSR_NXM) { 53 __quad_fqtox(x, &i); 54 } else { 55 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | 56 FSR_NXC; 57 __quad_setfsrp(&fsr); 58 } 59 } 60 return (i); 61 } 62 i = ((x->l.msw & 0x80000000)? 0x8000000000000000ul : 63 0x7fffffffffffffffl); 64 if (fsr & FSR_NVM) { 65 __quad_fqtox(x, &i); 66 } else { 67 fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC; 68 __quad_setfsrp(&fsr); 69 } 70 return (i); 71 } 72 if (xm < 0x3fff0000) { 73 i = 0l; 74 if (xm | x->l.frac2 | x->l.frac3 | x->l.frac4) { 75 /* signal inexact */ 76 if (fsr & FSR_NXM) { 77 __quad_fqtox(x, &i); 78 } else { 79 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 80 __quad_setfsrp(&fsr); 81 } 82 } 83 return (i); 84 } 85 86 /* now x is in the range of 64 bit int */ 87 i = 0x4000000000000000l | ((long) (xm & 0xffff) << 46) | 88 ((long) x->l.frac2 << 14) | (x->l.frac3 >> 18); 89 round = i & ((1l << (0x403d - (xm >> 16))) - 1); 90 i >>= (0x403d - (xm >> 16)); 91 if (x->l.msw & 0x80000000) 92 i = -i; 93 if (round | (x->l.frac3 & 0x3ffff) | x->l.frac4) { 94 /* signal inexact */ 95 if (fsr & FSR_NXM) { 96 __quad_fqtox(x, &i); 97 } else { 98 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 99 __quad_setfsrp(&fsr); 100 } 101 } 102 return (i); 103 } 104