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Linux kernel mirror (for testing)
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1/*
2 * File: arch/blackfin/lib/umodsi3.S
3 * Based on:
4 * Author:
5 *
6 * Created:
7 * Description: libgcc1 routines for Blackfin 5xx
8 *
9 * Modified:
10 * Copyright 2004-2006 Analog Devices Inc.
11 *
12 * Bugs: Enter bugs at http://blackfin.uclinux.org/
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see the file COPYING, or write
26 * to the Free Software Foundation, Inc.,
27 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28 */
29
30#ifdef CONFIG_ARITHMETIC_OPS_L1
31.section .l1.text
32#else
33.text
34#endif
35
36.extern ___udivsi3;
37.type ___udivsi3, STT_FUNC;
38.globl ___umodsi3
39.type ___umodsi3, STT_FUNC;
40___umodsi3:
41
42 CC=R0==0;
43 IF CC JUMP .LRETURN_R0; /* Return 0, if NR == 0 */
44 CC= R1==0;
45 IF CC JUMP .LRETURN_ZERO_VAL; /* Return 0, if DR == 0 */
46 CC=R0==R1;
47 IF CC JUMP .LRETURN_ZERO_VAL; /* Return 0, if NR == DR */
48 CC = R1 == 1;
49 IF CC JUMP .LRETURN_ZERO_VAL; /* Return 0, if DR == 1 */
50 CC = R0<R1 (IU);
51 IF CC JUMP .LRETURN_R0; /* Return dividend (R0),IF NR<DR */
52
53 [--SP] = (R7:6); /* Push registers and */
54 [--SP] = RETS; /* Return address */
55 R7 = R0; /* Copy of R0 */
56 R6 = R1;
57 SP += -12; /* Should always provide this space */
58 CALL ___udivsi3; /* Compute unsigned quotient using ___udiv32()*/
59 SP += 12;
60 R0 *= R6; /* Quotient * divisor */
61 R0 = R7 - R0; /* Dividend - (quotient * divisor) */
62 RETS = [SP++]; /* Pop return address */
63 ( R7:6) = [SP++]; /* And registers */
64 RTS; /* Return remainder */
65.LRETURN_ZERO_VAL:
66 R0 = 0;
67.LRETURN_R0:
68 RTS;
69
70.size ___umodsi3, .-___umodsi3