1 /* SPDX-License-Identifier: GPL-2.0-or-later W !! 1 /* libgcc1 routines for 68000 w/o floating-point hardware.
2 #include <linux/linkage.h> !! 2 Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc.
3 #include <asm/asmmacro.h> <<
4 #include <asm/core.h> <<
5 <<
6 ENTRY(__umodsi3) <<
7 <<
8 abi_entry_default <<
9 #if XCHAL_HAVE_DIV32 <<
10 remu a2, a2, a3 <<
11 #else <<
12 bltui a3, 2, .Lle_one /* check if th <<
13 3
14 do_nsau a5, a2, a6, a7 /* dividend_sh !! 4 This file is part of GNU CC.
15 do_nsau a4, a3, a6, a7 /* divisor_shi <<
16 bgeu a5, a4, .Lspecial <<
17 <<
18 sub a4, a4, a5 /* count = div <<
19 ssl a4 <<
20 sll a3, a3 /* divisor <<= <<
21 <<
22 /* test-subtract-and-shift loop */ <<
23 #if XCHAL_HAVE_LOOPS <<
24 loopnez a4, .Lloopend <<
25 #endif /* XCHAL_HAVE_LOOPS */ <<
26 .Lloop: <<
27 bltu a2, a3, .Lzerobit <<
28 sub a2, a2, a3 <<
29 .Lzerobit: <<
30 srli a3, a3, 1 <<
31 #if !XCHAL_HAVE_LOOPS <<
32 addi a4, a4, -1 <<
33 bnez a4, .Lloop <<
34 #endif /* !XCHAL_HAVE_LOOPS */ <<
35 .Lloopend: <<
36 <<
37 .Lspecial: <<
38 bltu a2, a3, .Lreturn <<
39 sub a2, a2, a3 /* subtract on <<
40 .Lreturn: <<
41 abi_ret_default <<
42 <<
43 .Lle_one: <<
44 bnez a3, .Lreturn0 <<
45 <<
46 /* Divide by zero: Use an illegal inst <<
47 The subsequent "DIV0" string can be <<
48 handler to identify the real cause <<
49 ill <<
50 .ascii "DIV0" <<
51 <<
52 .Lreturn0: <<
53 movi a2, 0 <<
54 #endif /* XCHAL_HAVE_DIV32 */ <<
55 abi_ret_default <<
56 5
57 ENDPROC(__umodsi3) !! 6 GNU CC is free software; you can redistribute it and/or modify it
58 EXPORT_SYMBOL(__umodsi3) !! 7 under the terms of the GNU General Public License as published by the
>> 8 Free Software Foundation; either version 2, or (at your option) any
>> 9 later version.
>> 10
>> 11 In addition to the permissions in the GNU General Public License, the
>> 12 Free Software Foundation gives you unlimited permission to link the
>> 13 compiled version of this file with other programs, and to distribute
>> 14 those programs without any restriction coming from the use of this
>> 15 file. (The General Public License restrictions do apply in other
>> 16 respects; for example, they cover modification of the file, and
>> 17 distribution when not linked into another program.)
>> 18
>> 19 This file is distributed in the hope that it will be useful, but
>> 20 WITHOUT ANY WARRANTY; without even the implied warranty of
>> 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> 22 General Public License for more details. */
>> 23
>> 24 /* As a special exception, if you link this library with files
>> 25 compiled with GCC to produce an executable, this does not cause
>> 26 the resulting executable to be covered by the GNU General Public License.
>> 27 This exception does not however invalidate any other reasons why
>> 28 the executable file might be covered by the GNU General Public License. */
>> 29
>> 30 /* Use this one for any 680x0; assumes no floating point hardware.
>> 31 The trailing " '" appearing on some lines is for ANSI preprocessors. Yuk.
>> 32 Some of this code comes from MINIX, via the folks at ericsson.
>> 33 D. V. Henkel-Wallace (gumby@cygnus.com) Fete Bastille, 1992
>> 34 */
>> 35 #include <asm/export.h>
>> 36 /* These are predefined by new versions of GNU cpp. */
>> 37
>> 38 #ifndef __USER_LABEL_PREFIX__
>> 39 #define __USER_LABEL_PREFIX__ _
>> 40 #endif
>> 41
>> 42 #ifndef __REGISTER_PREFIX__
>> 43 #define __REGISTER_PREFIX__
>> 44 #endif
>> 45
>> 46 #ifndef __IMMEDIATE_PREFIX__
>> 47 #define __IMMEDIATE_PREFIX__ #
>> 48 #endif
>> 49
>> 50 /* ANSI concatenation macros. */
>> 51
>> 52 #define CONCAT1(a, b) CONCAT2(a, b)
>> 53 #define CONCAT2(a, b) a ## b
>> 54
>> 55 /* Use the right prefix for global labels. */
>> 56
>> 57 #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
>> 58
>> 59 /* Use the right prefix for registers. */
>> 60
>> 61 #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
>> 62
>> 63 /* Use the right prefix for immediate values. */
>> 64
>> 65 #define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__, x)
>> 66
>> 67 #define d0 REG (d0)
>> 68 #define d1 REG (d1)
>> 69 #define d2 REG (d2)
>> 70 #define d3 REG (d3)
>> 71 #define d4 REG (d4)
>> 72 #define d5 REG (d5)
>> 73 #define d6 REG (d6)
>> 74 #define d7 REG (d7)
>> 75 #define a0 REG (a0)
>> 76 #define a1 REG (a1)
>> 77 #define a2 REG (a2)
>> 78 #define a3 REG (a3)
>> 79 #define a4 REG (a4)
>> 80 #define a5 REG (a5)
>> 81 #define a6 REG (a6)
>> 82 #define fp REG (fp)
>> 83 #define sp REG (sp)
>> 84
>> 85 .text
>> 86 .proc
>> 87 .globl SYM (__umodsi3)
>> 88 SYM (__umodsi3):
>> 89 movel sp@(8), d1 /* d1 = divisor */
>> 90 movel sp@(4), d0 /* d0 = dividend */
>> 91 movel d1, sp@-
>> 92 movel d0, sp@-
>> 93 jbsr SYM (__udivsi3)
>> 94 addql IMM (8), sp
>> 95 movel sp@(8), d1 /* d1 = divisor */
>> 96 #if !(defined(__mcf5200__) || defined(__mcoldfire__))
>> 97 movel d1, sp@-
>> 98 movel d0, sp@-
>> 99 jbsr SYM (__mulsi3) /* d0 = (a/b)*b */
>> 100 addql IMM (8), sp
>> 101 #else
>> 102 mulsl d1,d0
>> 103 #endif
>> 104 movel sp@(4), d1 /* d1 = dividend */
>> 105 subl d0, d1 /* d1 = a - (a/b)*b */
>> 106 movel d1, d0
>> 107 rts
>> 108 EXPORT_SYMBOL(__umodsi3)
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