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/*
* 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 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
.file "__reduction.s"
/
/ After argument reduction which returns n:
/ n mod 4 sin(x) cos(x) tan(x)
/ ----------------------------------------------------------
/ 0 S C S/C
/ 1 C -S -C/S
/ 2 -S -C S/C
/ 3 -C S -C/S
/ ----------------------------------------------------------
#include "libm.h"
#include "libm_protos.h"
ENTRY(__reduction)
#ifndef PIC
movl 12(%esp),%eax / load the high part of arg
#else
movl 16(%esp),%eax / load the high part of arg
#endif
andl $0x7fffffff,%eax / clear sign
cmpl $0x3fe921fb,%eax / Is |x| < pi/4 (= 0x3fe921fb54...) ?
jbe .L0
cmpl $0x7ff00000,%eax / Is arg a NaN or an Inf ?
jb .L1
.L0:
#ifndef PIC
fldl 8(%esp) / push arg
#else
fldl 12(%esp) / push arg
#endif
fwait
movl $0,%eax / set n = 0
ret
.L1:
pushl %ebp
movl %esp,%ebp
subl $16,%esp
PIC_SETUP(1)
leal -16(%ebp),%eax / address of y[0]
pushl %eax
#ifndef PIC
pushl 16(%ebp)
pushl 12(%ebp)
#else
pushl 20(%ebp)
pushl 16(%ebp)
#endif
call PIC_F(__rem_pio2) / call __rem_pio2(x,&y)
fldl -8(%ebp) / y[1]
fldl -16(%ebp) / y[0], y[1]
faddp %st,%st(1) / y[0]+y[1] round-to-extended
addl $28,%esp / 16+4*3
andl $3,%eax
PIC_WRAPUP
leave
ret
.align 4
SET_SIZE(__reduction)
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