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 "asin.s" 30 31#include "libm.h" 32LIBM_ANSI_PRAGMA_WEAK(asin,function) 33#include "libm_synonyms.h" 34#include "libm_protos.h" 35 36#undef fabs 37 38 ENTRY(asin) 39 fldl 4(%esp) / push x 40 fld1 / push 1 41 fld %st(1) / x , 1 , x 42 fabs / |x| , 1 , x 43 fucomp 44 fstsw %ax 45 sahf 46 ja .ERR 47 fadd %st(1),%st / 1+x,x 48 fld1 / 1,1+x,x 49 fsub %st(2),%st / 1-x,1+x,x 50 fmulp %st,%st(1) / (1-x)*(1+x),x 51 fsqrt / sqrt((1-x)/(1+x)),x 52 fpatan / atan(x/sqrt((1-x)/(1+x))) 53 ret 54 55.ERR: 56 / |x| > 1 57 pushl %ebp 58 movl %esp,%ebp 59 PIC_SETUP(1) 60 fstp %st(0) / x 61 fstp %st(0) / empty NPX stack 62 pushl $2 63 pushl 12(%ebp) / high x 64 pushl 8(%ebp) / low x 65 pushl 12(%ebp) / high x 66 pushl 8(%ebp) / low x 67 call PIC_F(_SVID_libm_err) / report SVID result/error 68 addl $20,%esp 69 PIC_WRAPUP 70 leave 71 ret 72 .align 4 73 SET_SIZE(asin) 74