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 "fmod.s"
  30 
  31 #include "libm.h"
  32 LIBM_ANSI_PRAGMA_WEAK(fmod,function)
  33 #include "libm_synonyms.h"
  34 #include "libm_protos.h"
  35 
  36         ENTRY(fmod)
  37         movl    16(%esp),%eax           / eax <-- hi_32(y)
  38         andl    $0x7fffffff,%eax        / eax <-- hi_32(|y|)
  39         orl     12(%esp),%eax           / eax <-- lo_32(y)|hi_32(|y|)
  40         je      .zero
  41 
  42         fldl    12(%esp)                / load arg y
  43         fldl    4(%esp)                 / load arg x
  44 .mod_loop:
  45         fprem                           / partial fmod
  46         fstsw   %ax                     / store status word
  47         andw    $0x400,%ax              / check for incomplete reduction
  48         jne     .mod_loop               / while incomplete, do fprem again
  49         fstp    %st(1)
  50         ret
  51 .zero:
  52         pushl   %ebp
  53         movl    %esp,%ebp
  54         PIC_SETUP(1)
  55         pushl   $27                     / case 27 in _SVID_libm_err
  56         pushl   20(%ebp)                / pass x
  57         pushl   16(%ebp)
  58         pushl   12(%ebp)                / pass y
  59         pushl   8(%ebp)
  60         call    PIC_F(_SVID_libm_err)
  61         addl    $20,%esp
  62         PIC_WRAPUP
  63         leave
  64         ret
  65         .align  4
  66         SET_SIZE(fmod)