1 /* Support file for -mfix-vr4120.
2 Copyright (C) 2002-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 Under Section 7 of GPL version 3, you are granted additional
17 permissions described in the GCC Runtime Library Exception, version
18 3.1, as published by the Free Software Foundation.
20 You should have received a copy of the GNU General Public License and
21 a copy of the GCC Runtime Library Exception along with this program;
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 <http://www.gnu.org/licenses/>. */
25 /* This file contains functions which implement divsi3 and modsi3 for
26 -mfix-vr4120. div and ddiv do not give the correct result when one
27 of the operands is negative. */
32 xor $3,$4,$5 /* t = x ^ y */ ; \
35 bgez $4,1f /* x >= 0 */; \
36 and $3,$3,$2 /* t = (x ^ y) & 0x80000000 in delay slot */ ;\
38 subu $4,$0,$4 /* x = -x */ ; \
41 bgez $5,2f /* y >= 0 */ ; \
43 subu $5,$0,$5 /* y = -y */ ; \
46 divu $0,$4,$5; /* we use divu because of INT_MIN */ \
50 break 7 /* division on zero y */ ; \
53 mflo $2 /* r = x / y */ ; \
55 beq $3,$0,4f /* t == 0 */ ; \
57 subu $2,$0,$2 /* r = -r */ ; \
61 .globl __vr4120_divsi3
68 .globl __vr4120_modsi3
74 mult $2,$7 # r = r * y1
78 subu $2,$6,$2 # r = x1 - r in delay slot