/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
.file "asinl.s"
#include "libm.h"
LIBM_ANSI_PRAGMA_WEAK(asinl,function)
ENTRY(asinl)
fldt 4(%esp) / push x
fld1 / push 1
fld %st(1) / x , 1 , x
fabs / |x| , 1 , x
fucomp
fstsw %ax
sahf
ja 9f
fadd %st(1),%st / 1+x,x
fld1 / 1,1+x,x
fsub %st(2),%st / 1-x,1+x,x
fmulp %st,%st(1) / (1-x)*(1+x),x
fsqrt / sqrt((1-x)*(1+x)),x
fpatan / atan(x/sqrt((1-x)*(1+x)))
ret
9:
/ |x| > 1
fstp %st(0) / x
fsub %st,%st(0) / +/-0 or NaN+invalid
fdiv %st,%st(0) / NaN+invalid or NaN
ret
.align 4
SET_SIZE(asinl)