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 /* 28 * These functions return the prevailing rounding mode per ANSI C spec: 29 * 0: toward zero 30 * 1: to nearest <<< default 31 * 2: toward positive infinity 32 * 3: toward negative infinity 33 * -1: indeterminable <<< never returned 34 */ 35 36 #include "lint.h" 37 #include <sys/types.h> 38 #include <floatingpoint.h> 39 #include "libc.h" 40 41 #if defined(__sparc) 42 43 int 44 __flt_rounds(void) 45 { 46 switch (_QgetRD()) { 47 case fp_tozero: 48 return (0); 49 50 case fp_positive: 51 return (2); 52 53 case fp_negative: 54 return (3); 55 } 56 return (1); 57 } 58 59 #elif defined(__i386) || defined(__amd64) 60 61 int 62 __fltrounds(void) 63 { 64 switch (__xgetRD()) { 65 case fp_tozero: 66 return (0); 67 68 case fp_positive: 69 return (2); 70 71 case fp_negative: 72 return (3); 73 } 74 return (1); 75 } 76 77 #else 78 #error Unknown architecture 79 #endif 80