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 #include "quad.h" 28 29 #ifdef __sparcv9 30 #define _Q_qtou _Qp_qtoui 31 #endif 32 33 /* 34 * _Q_qtou(x) returns (unsigned int)*x. 35 */ 36 unsigned 37 _Q_qtou(const union longdouble *x) 38 { 39 union longdouble z; 40 unsigned int xm, fsr; 41 int i, round; 42 43 xm = x->l.msw & 0x7fffffff; 44 45 __quad_getfsrp(&fsr); 46 47 /* handle nan, inf, and out-of-range cases */ 48 if (xm >= 0x401e0000) { 49 if (x->l.msw < 0x401f0000) { 50 i = 0x80000000 | ((xm & 0xffff) << 15) | 51 (x->l.frac2 >> 17); 52 if ((x->l.frac2 & 0x1ffff) | x->l.frac3 | x->l.frac4) { 53 /* signal inexact */ 54 if (fsr & FSR_NXM) { 55 /* z = x - 2^31 */ 56 if (xm & 0xffff || 57 x->l.frac2 & 0xffff0000) { 58 z.l.msw = xm & 0xffff; 59 z.l.frac2 = x->l.frac2; 60 z.l.frac3 = x->l.frac3; 61 z.l.frac4 = x->l.frac4; 62 } else if (x->l.frac2 & 0xffff || 63 x->l.frac3 & 0xffff0000) { 64 z.l.msw = x->l.frac2; 65 z.l.frac2 = x->l.frac3; 66 z.l.frac3 = x->l.frac4; 67 z.l.frac4 = 0; 68 } else if (x->l.frac3 & 0xffff || 69 x->l.frac4 & 0xffff0000) { 70 z.l.msw = x->l.frac3; 71 z.l.frac2 = x->l.frac4; 72 z.l.frac3 = z.l.frac4 = 0; 73 } else { 74 z.l.msw = x->l.frac4; 75 z.l.frac2 = z.l.frac3 = 76 z.l.frac4 = 0; 77 } 78 xm = 0x401e; 79 while ((z.l.msw & 0x10000) == 0) { 80 z.l.msw = (z.l.msw << 1) | 81 (z.l.frac2 >> 31); 82 z.l.frac2 = (z.l.frac2 << 1) | 83 (z.l.frac3 >> 31); 84 z.l.frac3 = (z.l.frac3 << 1) | 85 (z.l.frac4 >> 31); 86 z.l.frac4 <<= 1; 87 xm--; 88 } 89 z.l.msw |= (xm << 16); 90 __quad_fqtoi(&z, &i); 91 i |= 0x80000000; 92 } else { 93 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | 94 FSR_NXC; 95 __quad_setfsrp(&fsr); 96 } 97 } 98 return (i); 99 } 100 if (x->l.msw == 0xc01e0000 && (x->l.frac2 & 0xfffe0000) == 0) { 101 /* return largest negative int */ 102 i = 0x80000000; 103 if ((x->l.frac2 & 0x1ffff) | x->l.frac3 | x->l.frac4) { 104 /* signal inexact */ 105 if (fsr & FSR_NXM) { 106 __quad_fqtoi(x, &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 = ((x->l.msw & 0x80000000)? 0x80000000 : 0x7fffffff); 116 if (fsr & FSR_NVM) { 117 __quad_fqtoi(x, &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 if (xm | x->l.frac2 | x->l.frac3 | x->l.frac4) { 126 /* signal inexact */ 127 i = 0; 128 if (fsr & FSR_NXM) { 129 __quad_fqtoi(x, &i); 130 } else { 131 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 132 __quad_setfsrp(&fsr); 133 } 134 return (i); 135 } 136 return (0); 137 } 138 139 /* now x is in the range of int */ 140 i = 0x40000000 | ((xm & 0xffff) << 14) | (x->l.frac2 >> 18); 141 round = i & ((1 << (0x401d - (xm >> 16))) - 1); 142 i >>= (0x401d - (xm >> 16)); 143 if (x->l.msw & 0x80000000) 144 i = -i; 145 if (round | (x->l.frac2 & 0x3ffff) | x->l.frac3 | x->l.frac4) { 146 /* signal inexact */ 147 if (fsr & FSR_NXM) { 148 __quad_fqtoi(x, &i); 149 } else { 150 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 151 __quad_setfsrp(&fsr); 152 } 153 } 154 return (i); 155 } 156