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 31 /* 32 * _Qp_uitoq(pz, x) sets *pz = (long double)x. 33 */ 34 void _Qp_uitoq(union longdouble * pz,unsigned int x)35_Qp_uitoq(union longdouble *pz, unsigned int x) 36 37 #else 38 39 /* 40 * _Q_utoq(x) returns (long double)x. 41 */ 42 union longdouble 43 _Q_utoq(unsigned int x) 44 45 #endif /* __sparcv9 */ 46 47 { 48 #ifndef __sparcv9 49 union longdouble z; 50 #endif 51 unsigned int e; 52 53 /* test for zero */ 54 if (x == 0) { 55 Z.l.msw = Z.l.frac2 = Z.l.frac3 = Z.l.frac4 = 0; 56 QUAD_RETURN(Z); 57 } 58 59 /* find the most significant bit */ 60 for (e = 31; (x & (1 << e)) == 0; e--) 61 ; 62 63 if (e > 16) { 64 Z.l.msw = ((unsigned) x >> (e - 16)) & 0xffff; 65 Z.l.frac2 = (unsigned) x << (48 - e); 66 } else { 67 Z.l.msw = ((unsigned) x << (16 - e)) & 0xffff; 68 Z.l.frac2 = 0; 69 } 70 Z.l.frac3 = Z.l.frac4 = 0; 71 Z.l.msw |= ((e + 0x3fff) << 16); 72 QUAD_RETURN(Z); 73 } 74