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 "asinl.s" 30 31 #include "libm.h" 32 LIBM_ANSI_PRAGMA_WEAK(asinl,function) 33 34 #undef fabs 35 36 ENTRY(asinl) 37 fldt 4(%esp) / push x 38 fld1 / push 1 39 fld %st(1) / x , 1 , x 40 fabs / |x| , 1 , x 41 fucomp 42 fstsw %ax 43 sahf 44 ja 9f 45 fadd %st(1),%st / 1+x,x 46 fld1 / 1,1+x,x 47 fsub %st(2),%st / 1-x,1+x,x 48 fmulp %st,%st(1) / (1-x)*(1+x),x 49 fsqrt / sqrt((1-x)*(1+x)),x 50 fpatan / atan(x/sqrt((1-x)*(1+x))) 51 ret 52 9: 53 / |x| > 1 54 fstp %st(0) / x 55 fsub %st,%st(0) / +/-0 or NaN+invalid 56 fdiv %st,%st(0) / NaN+invalid or NaN 57 ret 58 .align 4 59 SET_SIZE(asinl)