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 2011 Nexenta Systems, Inc. All rights reserved. 24 */ 25 /* 26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 #pragma weak fegetround = __fegetround 31 #pragma weak fesetround = __fesetround 32 33 #pragma weak fegetround96 = __fegetround 34 #pragma weak fesetround96 = __fesetround96 35 36 #include "fenv_synonyms.h" 37 #include <fenv.h> 38 #include <ucontext.h> 39 #include <thread.h> 40 #include "fex_handler.h" 41 #include "fenv_inlines.h" 42 43 #if defined(__i386) && !defined(__amd64) 44 #include <float.h> 45 #endif 46 47 int fegetround(void) 48 { 49 unsigned long fsr; 50 51 __fenv_getfsr(&fsr); 52 return (int)__fenv_get_rd(fsr); 53 } 54 55 int fesetround(int r) 56 { 57 unsigned long fsr; 58 59 if (r & ~3) 60 return -1; 61 __fenv_getfsr(&fsr); 62 __fenv_set_rd(fsr, r); 63 __fenv_setfsr(&fsr); 64 #if defined(__i386) && !defined(__amd64) 65 FLT_ROUNDS = (0x2D >> (r << 1)) & 3; /* 0->1, 1->3, 2->2, 3->0 */ 66 #endif 67 return 0; 68 } 69 70 int fesetround96(int r) 71 { 72 unsigned long fsr; 73 74 if (r & ~3) 75 return 0; 76 __fenv_getfsr(&fsr); 77 __fenv_set_rd(fsr, r); 78 __fenv_setfsr(&fsr); 79 #if defined(__i386) && !defined(__amd64) 80 FLT_ROUNDS = (0x2D >> (r << 1)) & 3; /* 0->1, 1->3, 2->2, 3->0 */ 81 #endif 82 return 1; 83 } 84