/*
* 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
* 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.
*/
#include "libm.h"
frndint / [x],x
fxch / x, [x]
.shortcut:
/ Here, |x| <= 1,
fldl 4(%esp) / push x
f2xm1 / 2**x - 1
fld1 / 1,2**x - 1
faddp %st,%st(1) / 2**x
ret
.not_finite:
cmpl $0x7ff00000,%ecx / hi_32(|x|) > hi_32(INF)?
ja .NaN_or_pinf / if so, x is NaN
movl 4(%esp),%edx / edx <-- lo_32(x)
cmpl $0,%edx / lo_32(x) = 0?
jne .NaN_or_pinf / if not, x is NaN
movl 8(%esp),%eax / eax <-- hi_32(x)
andl $0x80000000,%eax / here, x is infinite, but +/-?
jz .NaN_or_pinf / branch if x = +INF
fldz / Here, x = -inf, so return 0
ret
.NaN_or_pinf:
/ Here, x = NaN or +inf, so load x and return immediately.
fldl 4(%esp)
fwait
ret
.align 4
SET_SIZE(exp2)