5261 libm should stop using synonyms.h
5298 fabs is 0-sized, confuses dis(1) and others
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Approved by: Gordon Ross <gwr@nexenta.com>

   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 "remainder.s"
  30 
  31 #include "libm.h"
  32 LIBM_ANSI_PRAGMA_WEAK(remainder,function)
  33 #include "libm_synonyms.h"
  34 #include "libm_protos.h"
  35 
  36         ENTRY(remainder)
  37         push    %rbp
  38         movq    %rsp,%rbp
  39         subq    $16,%rsp
  40         movlpd  %xmm1,-16(%rbp)
  41         movlpd  %xmm0,-8(%rbp)
  42 
  43         ucomisd %xmm0,%xmm1             / if x or y is NaN, use fprem1
  44         jp      1f
  45 
  46         movl    -12(%rbp),%eax          / eax <-- hi_32(y)
  47         andl    $0x7fffffff,%eax        / eax <-- hi_32(|y|)
  48         orl     -16(%rbp),%eax          / eax <-- lo_32(y)|hi_32(|y|)
  49         je      .yzero_or_xinf
  50 
  51         movl    -4(%rbp),%eax           / eax <-- hi_32(x)
  52         andl    $0x7fffffff,%eax        / eax <-- hi_32(|x|)
  53         cmpl    $0x7ff00000,%eax
  54         jne     1f
  55         cmpl    $0,-8(%rbp)
  56         je      .yzero_or_xinf
  57 1:
  58         fldl    -16(%rbp)               / y
  59         fldl    -8(%rbp)                / x
  60 .rem_loop:
  61         fprem1                          / partial remainder
  62         fstsw   %ax                     / store status word
  63         andw    $0x400,%ax              / check for incomplete reduction
  64         jne     .rem_loop               / while incomplete, do fprem1 again
  65         fstpl   -8(%rbp)
  66         movsd   -8(%rbp),%xmm0
  67         fstp    %st(0)
  68         leave
  69         ret
  70 
  71 .yzero_or_xinf:
  72         PIC_SETUP(1)
  73         movl    $28,%edi
  74         movl    $2,%eax
  75         call    PIC_F(_SVID_libm_err)
  76         PIC_WRAPUP
  77         leave
  78         ret
  79         .align  4
  80         SET_SIZE(remainder)
--- EOF ---