expm1f.s revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8
/*
* 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 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "libm.h"
#include "libm_synonyms.h"
.data
.align 4
.mhundred: .float -100.0
frndint / [z],z
fxch / z,[z]
PIC_SETUP(1)
PIC_SETUP(2)
.shortcut:
flds 4(%esp) / push x
fldl2e / push log2e }not for xtndd_dbl
fmulp %st,%st(1) / z = x*log2e }not for xtndd_dbl
f2xm1 / 2**(x*log2(e))-1 = e**x - 1
ret
.not_finite:
ja .NaN_or_pinf / branch if x is NaN
movl 4(%esp),%eax / eax <-- x
andl $0x80000000,%eax / here, x is infinite, but +/-?
jz .NaN_or_pinf / branch if x = +INF
fld1 / Here, x = -inf, so return -1
fchs
ret
.NaN_or_pinf:
/ Here, x = NaN or +inf, so load x and return immediately.
flds 4(%esp)
fwait
ret
.align 4
SET_SIZE(expm1f)