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_qtoux(x) returns (unsigned long)*x. 33 */ 34 unsigned long 35 _Qp_qtoux(const union longdouble *x) 36 { 37 union longdouble z; 38 unsigned long i, round; 39 unsigned int xm, fsr; 40 41 xm = x->l.msw & 0x7fffffff; 42 43 __quad_getfsrp(&fsr); 44 45 /* handle nan, inf, and out-of-range cases */ 46 if (xm >= 0x403e0000) { 47 if (x->l.msw < 0x403f0000) { 48 i = 0x8000000000000000ul | 49 ((long) (xm & 0xffff) << 47) | 50 ((long) x->l.frac2 << 15) | (x->l.frac3 >> 17); 51 if ((x->l.frac3 & 0x1ffff) | x->l.frac4) { 52 /* signal inexact */ 53 if (fsr & FSR_NXM) { 54 /* z = x - 2^63 */ 55 if (xm & 0xffff || 56 x->l.frac2 & 0xffff0000) { 57 z.l.msw = xm & 0xffff; 58 z.l.frac2 = x->l.frac2; 59 z.l.frac3 = x->l.frac3; 60 z.l.frac4 = x->l.frac4; 61 } else if (x->l.frac2 & 0xffff || 62 x->l.frac3 & 0xffff0000) { 63 z.l.msw = x->l.frac2; 64 z.l.frac2 = x->l.frac3; 65 z.l.frac3 = x->l.frac4; 66 z.l.frac4 = 0; 67 } else if (x->l.frac3 & 0xffff || 68 x->l.frac4 & 0xffff0000) { 69 z.l.msw = x->l.frac3; 70 z.l.frac2 = x->l.frac4; 71 z.l.frac3 = z.l.frac4 = 0; 72 } else { 73 z.l.msw = x->l.frac4; 74 z.l.frac2 = z.l.frac3 = 75 z.l.frac4 = 0; 76 } 77 xm = 0x403e; 78 while ((z.l.msw & 0x10000) == 0) { 79 z.l.msw = (z.l.msw << 1) | 80 (z.l.frac2 >> 31); 81 z.l.frac2 = (z.l.frac2 << 1) | 82 (z.l.frac3 >> 31); 83 z.l.frac3 = (z.l.frac3 << 1) | 84 (z.l.frac4 >> 31); 85 z.l.frac4 <<= 1; 86 xm--; 87 } 88 z.l.msw |= (xm << 16); 89 __quad_fqtox(&z, (long *)&i); 90 i |= 0x8000000000000000ul; 91 } else { 92 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | 93 FSR_NXC; 94 __quad_setfsrp(&fsr); 95 } 96 } 97 return (i); 98 } 99 if (x->l.msw == 0xc03e0000 && x->l.frac2 == 0 && 100 (x->l.frac3 & 0xfffe0000) == 0) { 101 /* return largest negative 64 bit int */ 102 i = 0x8000000000000000ul; 103 if ((x->l.frac3 & 0x1ffff) | x->l.frac4) { 104 /* signal inexact */ 105 if (fsr & FSR_NXM) { 106 __quad_fqtox(x, (long *)&i); 107 } else { 108 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | 109 FSR_NXC; 110 __quad_setfsrp(&fsr); 111 } 112 } 113 return (i); 114 } 115 i = 0x7fffffffffffffffl; 116 if (fsr & FSR_NVM) { 117 __quad_fqtox(x, (long *)&i); 118 } else { 119 fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC; 120 __quad_setfsrp(&fsr); 121 } 122 return (i); 123 } 124 if (xm < 0x3fff0000) { 125 i = 0l; 126 if (xm | x->l.frac2 | x->l.frac3 | x->l.frac4) { 127 /* signal inexact */ 128 if (fsr & FSR_NXM) { 129 __quad_fqtox(x, (long *)&i); 130 } else { 131 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 132 __quad_setfsrp(&fsr); 133 } 134 } 135 return (i); 136 } 137 138 /* now x is in the range of long */ 139 i = 0x4000000000000000l | ((long) (xm & 0xffff) << 46) | 140 ((long) x->l.frac2 << 14) | (x->l.frac3 >> 18); 141 round = i & ((1l << (0x403d - (xm >> 16))) - 1); 142 i >>= (0x403d - (xm >> 16)); 143 if (x->l.msw & 0x80000000) 144 i = -i; 145 if (round | (x->l.frac3 & 0x3ffff) | x->l.frac4) { 146 /* signal inexact */ 147 if (fsr & FSR_NXM) { 148 __quad_fqtox(x, (long *)&i); 149 } else { 150 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 151 __quad_setfsrp(&fsr); 152 } 153 } 154 return (i); 155 } 156