scalbf.c 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"
float
scalbf(float x, float y) {
ix = *(int *)&x;
iy = *(int *)&y;
/* x is nan or y is inf or nan */
return ((iy < 0)? x / -y : x * y);
}
/* see if y is an integer without raising inexact */
if (hy >= 0x4b000000) {
/* |y| >= 2^23, so it must be an integer */
} else if (hy < 0x3f800000) {
/* |y| < 1, so it must be zero or non-integer */
return ((hy == 0)? x : (x - x) / (x - x));
} else {
return ((y - y) / (y - y));
n = (int)y;
}
return (scalbnf(x, n));
}