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 2006 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 .file "acosl.s" 30 31#include "libm.h" 32LIBM_ANSI_PRAGMA_WEAK(acosl,function) 33 34 ENTRY(acosl) 35 fldt 4(%esp) / push x 36 fld1 / push 1 37 fld %st(1) / x , 1 , x 38 fabs / |x| , 1 , x 39 fucomp 40 fstsw %ax 41 sahf 42 ja 9f 43 fadd %st(1),%st / 1+x,x 44 fldz 45 fucomp 46 fstsw %ax 47 sahf 48 jp .L1 49 jne .L1 50 / x is -1 51 fstp %st(0) / -1 52 fstp %st(0) / empty NPX stack 53 fldpi 54 ret 55.L1: 56 fxch %st(1) / x,1+x 57 fld1 / 1,x,1+x 58 fsubp %st,%st(1) / 1-x,1+x 59 fdivp %st,%st(1) / (1-x)/(1+x) 60 fsqrt 61 fld1 / 1,sqrt((1-x)/(1+x)) 62 fpatan 63 fadd %st(0),%st 64 ret 659: 66 / |x| > 1 67 fstp %st(0) / x 68 fsub %st,%st(0) / +/-0 or NaN+invalid 69 fdiv %st,%st(0) / NaN+invalid or NaN 70 ret 71 .align 4 72 SET_SIZE(acosl) 73