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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * These functions return the prevailing rounding mode per ANSI C spec: 31 * 0: toward zero 32 * 1: to nearest <<< default 33 * 2: toward positive infinity 34 * 3: toward negative infinity 35 * -1: indeterminable <<< never returned 36 */ 37 38 #include "lint.h" 39 #include <sys/types.h> 40 #include <floatingpoint.h> 41 #include "libc.h" 42 43 #if defined(__sparc) 44 45 int 46 __flt_rounds(void) 47 { 48 switch (_QgetRD()) { 49 case fp_tozero: 50 return (0); 51 52 case fp_positive: 53 return (2); 54 55 case fp_negative: 56 return (3); 57 } 58 return (1); 59 } 60 61 #elif defined(__i386) || defined(__amd64) 62 63 int 64 __fltrounds(void) 65 { 66 switch (__xgetRD()) { 67 case fp_tozero: 68 return (0); 69 70 case fp_positive: 71 return (2); 72 73 case fp_negative: 74 return (3); 75 } 76 return (1); 77 } 78 79 #else 80 #error Unknown architecture 81 #endif 82