usr/src/lib/libm/amd64/src/remainderf.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 2005 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  */
  28
  29         .file "remainderf.s"
  30
  31 #include "libm.h"
  32 LIBM_ANSI_PRAGMA_WEAK(remainderf,function)
  33
  34         ENTRY(remainderf)
  35         push    %rbp
  36         movq    %rsp,%rbp
  37         subq    $16,%rsp
  38         movss   %xmm1,-8(%rbp)
  39         movss   %xmm0,-4(%rbp)
  40         flds    -8(%rbp)                / load arg y
  41         flds    -4(%rbp)                / load arg x
  42 .rem_loop:
  43         fprem1                          / partial remainder
  44         fstsw   %ax                     / store status word
  45         andw    $0x400,%ax              / check whether reduction complete
  46         jne     .rem_loop               / while reduction incomplete, do fprem1
  47         fstps   -4(%rbp)
  48         movss   -4(%rbp),%xmm0
  49         fstp    %st(0)
  50         leave
  51         ret
  52         .align  4
  53         SET_SIZE(remainderf)