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1394f032 BW |
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 | .globl ___umodsi3 | |
38 | ___umodsi3: | |
39 | ||
40 | CC=R0==0; | |
41 | IF CC JUMP .LRETURN_R0; /* Return 0, if NR == 0 */ | |
42 | CC= R1==0; | |
43 | IF CC JUMP .LRETURN_ZERO_VAL; /* Return 0, if DR == 0 */ | |
44 | CC=R0==R1; | |
45 | IF CC JUMP .LRETURN_ZERO_VAL; /* Return 0, if NR == DR */ | |
46 | CC = R1 == 1; | |
47 | IF CC JUMP .LRETURN_ZERO_VAL; /* Return 0, if DR == 1 */ | |
48 | CC = R0<R1 (IU); | |
49 | IF CC JUMP .LRETURN_R0; /* Return dividend (R0),IF NR<DR */ | |
50 | ||
51 | [--SP] = (R7:6); /* Push registers and */ | |
52 | [--SP] = RETS; /* Return address */ | |
53 | R7 = R0; /* Copy of R0 */ | |
54 | R6 = R1; | |
55 | SP += -12; /* Should always provide this space */ | |
56 | CALL ___udivsi3; /* Compute unsigned quotient using ___udiv32()*/ | |
57 | SP += 12; | |
58 | R0 *= R6; /* Quotient * divisor */ | |
59 | R0 = R7 - R0; /* Dividend - (quotient * divisor) */ | |
60 | RETS = [SP++]; /* Pop return address */ | |
61 | ( R7:6) = [SP++]; /* And registers */ | |
62 | RTS; /* Return remainder */ | |
63 | .LRETURN_ZERO_VAL: | |
64 | R0 = 0; | |
65 | .LRETURN_R0: | |
66 | RTS; |