usr/src/lib/libm/i386/src/rintf.s

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  23  */
  24 /*
  25  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  */
  28
  29         .file "rintf.s"
  30
  31 #include "libm.h"
  32 LIBM_ANSI_PRAGMA_WEAK(rintf,function)
  33
  34         ENTRY(rintf)
  35         flds    4(%esp)                 / load x
  36         movl    4(%esp),%eax            / eax <-- x
  37         andl    $0x7fffffff,%eax        / eax <-- |x|
  38         cmpl    $0x4b000000,%eax        / is |x| >= 2**23?
  39         jae     .done                   / if so, branch (already integral)
  40         frndint                         / [x], per rounding mode
  41 .done:
  42         fwait
  43         ret
  44         .align  4
  45         SET_SIZE(rintf)