1*25c28e83SPiotr Jasiukajtis/* 2*25c28e83SPiotr Jasiukajtis * CDDL HEADER START 3*25c28e83SPiotr Jasiukajtis * 4*25c28e83SPiotr Jasiukajtis * The contents of this file are subject to the terms of the 5*25c28e83SPiotr Jasiukajtis * Common Development and Distribution License (the "License"). 6*25c28e83SPiotr Jasiukajtis * You may not use this file except in compliance with the License. 7*25c28e83SPiotr Jasiukajtis * 8*25c28e83SPiotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*25c28e83SPiotr Jasiukajtis * or http://www.opensolaris.org/os/licensing. 10*25c28e83SPiotr Jasiukajtis * See the License for the specific language governing permissions 11*25c28e83SPiotr Jasiukajtis * and limitations under the License. 12*25c28e83SPiotr Jasiukajtis * 13*25c28e83SPiotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each 14*25c28e83SPiotr Jasiukajtis * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*25c28e83SPiotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the 16*25c28e83SPiotr Jasiukajtis * fields enclosed by brackets "[]" replaced with your own identifying 17*25c28e83SPiotr Jasiukajtis * information: Portions Copyright [yyyy] [name of copyright owner] 18*25c28e83SPiotr Jasiukajtis * 19*25c28e83SPiotr Jasiukajtis * CDDL HEADER END 20*25c28e83SPiotr Jasiukajtis */ 21*25c28e83SPiotr Jasiukajtis/* 22*25c28e83SPiotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 23*25c28e83SPiotr Jasiukajtis */ 24*25c28e83SPiotr Jasiukajtis/* 25*25c28e83SPiotr Jasiukajtis * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 26*25c28e83SPiotr Jasiukajtis * Use is subject to license terms. 27*25c28e83SPiotr Jasiukajtis */ 28*25c28e83SPiotr Jasiukajtis 29*25c28e83SPiotr Jasiukajtis .file "__reduction.s" 30*25c28e83SPiotr Jasiukajtis 31*25c28e83SPiotr Jasiukajtis/ 32*25c28e83SPiotr Jasiukajtis/ After argument reduction which returns n: 33*25c28e83SPiotr Jasiukajtis/ n mod 4 sin(x) cos(x) tan(x) 34*25c28e83SPiotr Jasiukajtis/ ---------------------------------------------------------- 35*25c28e83SPiotr Jasiukajtis/ 0 S C S/C 36*25c28e83SPiotr Jasiukajtis/ 1 C -S -C/S 37*25c28e83SPiotr Jasiukajtis/ 2 -S -C S/C 38*25c28e83SPiotr Jasiukajtis/ 3 -C S -C/S 39*25c28e83SPiotr Jasiukajtis/ ---------------------------------------------------------- 40*25c28e83SPiotr Jasiukajtis 41*25c28e83SPiotr Jasiukajtis#include "libm.h" 42*25c28e83SPiotr Jasiukajtis#include "libm_protos.h" 43*25c28e83SPiotr Jasiukajtis 44*25c28e83SPiotr Jasiukajtis ENTRY(__reduction) 45*25c28e83SPiotr Jasiukajtis#ifndef PIC 46*25c28e83SPiotr Jasiukajtis movl 12(%esp),%eax / load the high part of arg 47*25c28e83SPiotr Jasiukajtis#else 48*25c28e83SPiotr Jasiukajtis movl 16(%esp),%eax / load the high part of arg 49*25c28e83SPiotr Jasiukajtis#endif 50*25c28e83SPiotr Jasiukajtis andl $0x7fffffff,%eax / clear sign 51*25c28e83SPiotr Jasiukajtis cmpl $0x3fe921fb,%eax / Is |x| < pi/4 (= 0x3fe921fb54...) ? 52*25c28e83SPiotr Jasiukajtis jbe .L0 53*25c28e83SPiotr Jasiukajtis cmpl $0x7ff00000,%eax / Is arg a NaN or an Inf ? 54*25c28e83SPiotr Jasiukajtis jb .L1 55*25c28e83SPiotr Jasiukajtis.L0: 56*25c28e83SPiotr Jasiukajtis#ifndef PIC 57*25c28e83SPiotr Jasiukajtis fldl 8(%esp) / push arg 58*25c28e83SPiotr Jasiukajtis#else 59*25c28e83SPiotr Jasiukajtis fldl 12(%esp) / push arg 60*25c28e83SPiotr Jasiukajtis#endif 61*25c28e83SPiotr Jasiukajtis fwait 62*25c28e83SPiotr Jasiukajtis movl $0,%eax / set n = 0 63*25c28e83SPiotr Jasiukajtis ret 64*25c28e83SPiotr Jasiukajtis.L1: 65*25c28e83SPiotr Jasiukajtis pushl %ebp 66*25c28e83SPiotr Jasiukajtis movl %esp,%ebp 67*25c28e83SPiotr Jasiukajtis subl $16,%esp 68*25c28e83SPiotr Jasiukajtis PIC_SETUP(1) 69*25c28e83SPiotr Jasiukajtis leal -16(%ebp),%eax / address of y[0] 70*25c28e83SPiotr Jasiukajtis pushl %eax 71*25c28e83SPiotr Jasiukajtis#ifndef PIC 72*25c28e83SPiotr Jasiukajtis pushl 16(%ebp) 73*25c28e83SPiotr Jasiukajtis pushl 12(%ebp) 74*25c28e83SPiotr Jasiukajtis#else 75*25c28e83SPiotr Jasiukajtis pushl 20(%ebp) 76*25c28e83SPiotr Jasiukajtis pushl 16(%ebp) 77*25c28e83SPiotr Jasiukajtis#endif 78*25c28e83SPiotr Jasiukajtis call PIC_F(__rem_pio2) / call __rem_pio2(x,&y) 79*25c28e83SPiotr Jasiukajtis fldl -8(%ebp) / y[1] 80*25c28e83SPiotr Jasiukajtis fldl -16(%ebp) / y[0], y[1] 81*25c28e83SPiotr Jasiukajtis faddp %st,%st(1) / y[0]+y[1] round-to-extended 82*25c28e83SPiotr Jasiukajtis addl $28,%esp / 16+4*3 83*25c28e83SPiotr Jasiukajtis andl $3,%eax 84*25c28e83SPiotr Jasiukajtis PIC_WRAPUP 85*25c28e83SPiotr Jasiukajtis leave 86*25c28e83SPiotr Jasiukajtis ret 87*25c28e83SPiotr Jasiukajtis .align 4 88*25c28e83SPiotr Jasiukajtis SET_SIZE(__reduction) 89