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 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 23 */ 24/* 25 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 .file "__reduction.s" 30 31/ 32/ After argument reduction which returns n: 33/ n mod 4 sin(x) cos(x) tan(x) 34/ ---------------------------------------------------------- 35/ 0 S C S/C 36/ 1 C -S -C/S 37/ 2 -S -C S/C 38/ 3 -C S -C/S 39/ ---------------------------------------------------------- 40 41#include "libm.h" 42#include "libm_synonyms.h" 43#include "libm_protos.h" 44#undef fabs 45 46 ENTRY(__reduction) 47#ifndef PIC 48 movl 12(%esp),%eax / load the high part of arg 49#else 50 movl 16(%esp),%eax / load the high part of arg 51#endif 52 andl $0x7fffffff,%eax / clear sign 53 cmpl $0x3fe921fb,%eax / Is |x| < pi/4 (= 0x3fe921fb54...) ? 54 jbe .L0 55 cmpl $0x7ff00000,%eax / Is arg a NaN or an Inf ? 56 jb .L1 57.L0: 58#ifndef PIC 59 fldl 8(%esp) / push arg 60#else 61 fldl 12(%esp) / push arg 62#endif 63 fwait 64 movl $0,%eax / set n = 0 65 ret 66.L1: 67 pushl %ebp 68 movl %esp,%ebp 69 subl $16,%esp 70 PIC_SETUP(1) 71 leal -16(%ebp),%eax / address of y[0] 72 pushl %eax 73#ifndef PIC 74 pushl 16(%ebp) 75 pushl 12(%ebp) 76#else 77 pushl 20(%ebp) 78 pushl 16(%ebp) 79#endif 80 call PIC_F(__rem_pio2) / call __rem_pio2(x,&y) 81 fldl -8(%ebp) / y[1] 82 fldl -16(%ebp) / y[0], y[1] 83 faddp %st,%st(1) / y[0]+y[1] round-to-extended 84 addl $28,%esp / 16+4*3 85 andl $3,%eax 86 PIC_WRAPUP 87 leave 88 ret 89 .align 4 90 SET_SIZE(__reduction) 91