1 /* i80386 __mpn_rshift --
2 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3 This file is part of the GNU MP Library.
5 The GNU MP Library is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or (at your
8 option) any later version.
10 The GNU MP Library is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
13 License for more details.
15 You should have received a copy of the GNU Lesser General Public License
16 along with the GNU MP Library; see the file COPYING.LIB. If not,
17 see <http://www.gnu.org/licenses/>. */
20 #include "asm-syntax.h"
22 #define PARMS 4+12 /* space for 3 saved regs */
32 cfi_adjust_cfa_offset (4)
34 cfi_adjust_cfa_offset (4)
36 cfi_adjust_cfa_offset (4)
39 cfi_rel_offset (edi, 8)
41 cfi_rel_offset (esi, 4)
44 leal -4(%edi,%edx,4),%edi
45 leal (%esi,%edx,4),%esi
48 movl (%esi,%edx,4),%ebx /* read least significant limb */
49 cfi_rel_offset (ebx, 0)
52 shrdl %cl,%ebx,%eax /* compute carry limb */
55 pushl %eax /* push carry limb onto stack */
56 cfi_adjust_cfa_offset (4)
58 jnz L(1) /* enter loop in the middle */
62 L(oop): movl (%esi,%edx,4),%ebx /* load next higher limb */
63 shrdl %cl,%ebx,%eax /* compute result limb */
64 movl %eax,(%edi,%edx,4) /* store it */
66 L(1): movl (%esi,%edx,4),%eax
68 movl %ebx,(%edi,%edx,4)
72 shrl %cl,%eax /* compute most significant limb */
73 movl %eax,(%edi) /* store it */
75 popl %eax /* pop carry limb */
76 cfi_adjust_cfa_offset (-4)
79 cfi_adjust_cfa_offset (-4)
82 cfi_adjust_cfa_offset (-4)
85 cfi_adjust_cfa_offset (-4)
91 L(end): shrl %cl,%ebx /* compute most significant limb */
92 movl %ebx,(%edi) /* store it */
95 cfi_adjust_cfa_offset (-4)
98 cfi_adjust_cfa_offset (-4)
101 cfi_adjust_cfa_offset (-4)