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_qtou _Qp_qtoui 33 #endif 34 35 /* 36 * _Q_qtou(x) returns (unsigned int)*x. 37 */ 38 unsigned 39 _Q_qtou(const union longdouble *x) 40 { 41 union longdouble z; 42 unsigned int xm, fsr; 43 int i, round; 44 45 xm = x->l.msw & 0x7fffffff; 46 47 __quad_getfsrp(&fsr); 48 49 /* handle nan, inf, and out-of-range cases */ 50 if (xm >= 0x401e0000) { 51 if (x->l.msw < 0x401f0000) { 52 i = 0x80000000 | ((xm & 0xffff) << 15) | 53 (x->l.frac2 >> 17); 54 if ((x->l.frac2 & 0x1ffff) | x->l.frac3 | x->l.frac4) { 55 /* signal inexact */ 56 if (fsr & FSR_NXM) { 57 /* z = x - 2^31 */ 58 if (xm & 0xffff || 59 x->l.frac2 & 0xffff0000) { 60 z.l.msw = xm & 0xffff; 61 z.l.frac2 = x->l.frac2; 62 z.l.frac3 = x->l.frac3; 63 z.l.frac4 = x->l.frac4; 64 } else if (x->l.frac2 & 0xffff || 65 x->l.frac3 & 0xffff0000) { 66 z.l.msw = x->l.frac2; 67 z.l.frac2 = x->l.frac3; 68 z.l.frac3 = x->l.frac4; 69 z.l.frac4 = 0; 70 } else if (x->l.frac3 & 0xffff || 71 x->l.frac4 & 0xffff0000) { 72 z.l.msw = x->l.frac3; 73 z.l.frac2 = x->l.frac4; 74 z.l.frac3 = z.l.frac4 = 0; 75 } else { 76 z.l.msw = x->l.frac4; 77 z.l.frac2 = z.l.frac3 = 78 z.l.frac4 = 0; 79 } 80 xm = 0x401e; 81 while ((z.l.msw & 0x10000) == 0) { 82 z.l.msw = (z.l.msw << 1) | 83 (z.l.frac2 >> 31); 84 z.l.frac2 = (z.l.frac2 << 1) | 85 (z.l.frac3 >> 31); 86 z.l.frac3 = (z.l.frac3 << 1) | 87 (z.l.frac4 >> 31); 88 z.l.frac4 <<= 1; 89 xm--; 90 } 91 z.l.msw |= (xm << 16); 92 __quad_fqtoi(&z, &i); 93 i |= 0x80000000; 94 } else { 95 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | 96 FSR_NXC; 97 __quad_setfsrp(&fsr); 98 } 99 } 100 return (i); 101 } 102 if (x->l.msw == 0xc01e0000 && (x->l.frac2 & 0xfffe0000) == 0) { 103 /* return largest negative int */ 104 i = 0x80000000; 105 if ((x->l.frac2 & 0x1ffff) | x->l.frac3 | x->l.frac4) { 106 /* signal inexact */ 107 if (fsr & FSR_NXM) { 108 __quad_fqtoi(x, &i); 109 } else { 110 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | 111 FSR_NXC; 112 __quad_setfsrp(&fsr); 113 } 114 } 115 return (i); 116 } 117 i = ((x->l.msw & 0x80000000)? 0x80000000 : 0x7fffffff); 118 if (fsr & FSR_NVM) { 119 __quad_fqtoi(x, &i); 120 } else { 121 fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC; 122 __quad_setfsrp(&fsr); 123 } 124 return (i); 125 } 126 if (xm < 0x3fff0000) { 127 if (xm | x->l.frac2 | x->l.frac3 | x->l.frac4) { 128 /* signal inexact */ 129 i = 0; 130 if (fsr & FSR_NXM) { 131 __quad_fqtoi(x, &i); 132 } else { 133 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 134 __quad_setfsrp(&fsr); 135 } 136 return (i); 137 } 138 return (0); 139 } 140 141 /* now x is in the range of int */ 142 i = 0x40000000 | ((xm & 0xffff) << 14) | (x->l.frac2 >> 18); 143 round = i & ((1 << (0x401d - (xm >> 16))) - 1); 144 i >>= (0x401d - (xm >> 16)); 145 if (x->l.msw & 0x80000000) 146 i = -i; 147 if (round | (x->l.frac2 & 0x3ffff) | x->l.frac3 | x->l.frac4) { 148 /* signal inexact */ 149 if (fsr & FSR_NXM) { 150 __quad_fqtoi(x, &i); 151 } else { 152 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 153 __quad_setfsrp(&fsr); 154 } 155 } 156 return (i); 157 } 158