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 "acosl.s" 30 31#include "libm.h" 32LIBM_ANSI_PRAGMA_WEAK(acosl,function) 33 34 ENTRY(acosl) 35 fldt 8(%rsp) / push x 36 fld1 / push 1 37 fld %st(1) / x , 1 , x 38 fabs / |x| , 1 , x 39 fucomip %st(1),%st 40 ja 9f 41 fadd %st(1),%st / 1+x,x 42 fldz 43 fucomip %st(1),%st 44 jp .L1 45 jne .L1 46 / x is -1 47 fstp %st(0) / -1 48 fstp %st(0) / empty NPX stack 49 fldpi 50 ret 51.L1: 52 fxch %st(1) / x,1+x 53 fld1 / 1,x,1+x 54 fsubp %st,%st(1) / 1-x,1+x 55 fdivp %st,%st(1) / (1-x)/(1+x) 56 fsqrt 57 fld1 / 1,sqrt((1-x)/(1+x)) 58 fpatan 59 fadd %st(0),%st 60 ret 619: 62 / |x| > 1 63 fstp %st(0) / x 64 fsub %st,%st(0) / +/-0 or NaN+invalid 65 fdiv %st,%st(0) / NaN+invalid or NaN 66 ret 67 .align 16 68 SET_SIZE(acosl) 69