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 #ifdef __sparcv9 32 #define _Q_qtoi _Qp_qtoi 33 #endif 34 35 /* 36 * _Q_qtoi(x) returns (int)*x. 37 */ 38 int 39 _Q_qtoi(const union longdouble *x) 40 { 41 unsigned int xm, fsr; 42 int i, round; 43 44 xm = x->l.msw & 0x7fffffff; 45 46 __quad_getfsrp(&fsr); 47 48 /* handle nan, inf, and out-of-range cases */ 49 if (xm >= 0x401e0000) { 50 if (x->l.msw == 0xc01e0000 && (x->l.frac2 & 0xfffe0000) == 0) { 51 /* return largest negative int */ 52 i = 0x80000000; 53 if ((x->l.frac2 & 0x1ffff) | x->l.frac3 | x->l.frac4) { 54 /* signal inexact */ 55 if (fsr & FSR_NXM) { 56 __quad_fqtoi(x, &i); 57 } else { 58 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | 59 FSR_NXC; 60 __quad_setfsrp(&fsr); 61 } 62 } 63 return (i); 64 } 65 i = ((x->l.msw & 0x80000000)? 0x80000000 : 0x7fffffff); 66 if (fsr & FSR_NVM) { 67 __quad_fqtoi(x, &i); 68 } else { 69 fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC; 70 __quad_setfsrp(&fsr); 71 } 72 return (i); 73 } 74 if (xm < 0x3fff0000) { 75 i = 0; 76 if (xm | x->l.frac2 | x->l.frac3 | x->l.frac4) { 77 /* signal inexact */ 78 if (fsr & FSR_NXM) { 79 __quad_fqtoi(x, &i); 80 } else { 81 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 82 __quad_setfsrp(&fsr); 83 } 84 } 85 return (i); 86 } 87 88 /* now x is in the range of int */ 89 i = (int) (0x40000000 | ((xm & 0xffff) << 14) | (x->l.frac2 >> 18)); 90 round = i & ((1 << (0x401d - (xm >> 16))) - 1); 91 i >>= (0x401d - (xm >> 16)); 92 if (x->l.msw & 0x80000000) 93 i = -i; 94 if (round | (x->l.frac2 & 0x3ffff) | x->l.frac3 | x->l.frac4) { 95 /* signal inexact */ 96 if (fsr & FSR_NXM) { 97 __quad_fqtoi(x, &i); 98 } else { 99 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 100 __quad_setfsrp(&fsr); 101 } 102 } 103 return (i); 104 } 105