1 /* SPDX-License-Identifier: GPL-2.0-only */ !! 1 /* libgcc1 routines for 68000 w/o floating-point hardware.
2 /* !! 2 Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc.
3 * Copyright (c) 2021, The Linux Foundation. A !! 3
4 */ !! 4 This file is part of GNU CC.
5 !! 5
6 #include <linux/linkage.h> !! 6 GNU CC is free software; you can redistribute it and/or modify it
7 !! 7 under the terms of the GNU General Public License as published by the
8 SYM_FUNC_START(__hexagon_modsi3) !! 8 Free Software Foundation; either version 2, or (at your option) any
9 { !! 9 later version.
10 p2 = cmp.ge(r0,#0) !! 10
11 r2 = abs(r0) !! 11 In addition to the permissions in the GNU General Public License, the
12 r1 = abs(r1) !! 12 Free Software Foundation gives you unlimited permission to link the
13 } !! 13 compiled version of this file with other programs, and to distribute
14 { !! 14 those programs without any restriction coming from the use of this
15 r3 = cl0(r2) !! 15 file. (The General Public License restrictions do apply in other
16 r4 = cl0(r1) !! 16 respects; for example, they cover modification of the file, and
17 p0 = cmp.gtu(r1,r2) !! 17 distribution when not linked into another program.)
18 } !! 18
19 { !! 19 This file is distributed in the hope that it will be useful, but
20 r3 = sub(r4,r3) !! 20 WITHOUT ANY WARRANTY; without even the implied warranty of
21 if (p0) jumpr r31 !! 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 } !! 22 General Public License for more details. */
23 { !! 23
24 p1 = cmp.eq(r3,#0) !! 24 /* As a special exception, if you link this library with files
25 loop0(1f,r3) !! 25 compiled with GCC to produce an executable, this does not cause
26 r0 = r2 !! 26 the resulting executable to be covered by the GNU General Public License.
27 r2 = lsl(r1,r3) !! 27 This exception does not however invalidate any other reasons why
28 } !! 28 the executable file might be covered by the GNU General Public License. */
29 .falign !! 29
30 1: !! 30 /* Use this one for any 680x0; assumes no floating point hardware.
31 { !! 31 The trailing " '" appearing on some lines is for ANSI preprocessors. Yuk.
32 p0 = cmp.gtu(r2,r0) !! 32 Some of this code comes from MINIX, via the folks at ericsson.
33 if (!p0.new) r0 = sub(r0,r2) !! 33 D. V. Henkel-Wallace (gumby@cygnus.com) Fete Bastille, 1992
34 r2 = lsr(r2,#1) !! 34 */
35 if (p1) r1 = #0 !! 35
36 }:endloop0 !! 36 #include <linux/export.h>
37 { !! 37
38 p0 = cmp.gtu(r2,r0) !! 38 /* These are predefined by new versions of GNU cpp. */
39 if (!p0.new) r0 = sub(r0,r1) !! 39
40 if (p2) jumpr r31 !! 40 #ifndef __USER_LABEL_PREFIX__
41 } !! 41 #define __USER_LABEL_PREFIX__ _
42 { !! 42 #endif
43 r0 = neg(r0) !! 43
44 jumpr r31 !! 44 #ifndef __REGISTER_PREFIX__
45 } !! 45 #define __REGISTER_PREFIX__
46 SYM_FUNC_END(__hexagon_modsi3) !! 46 #endif
>> 47
>> 48 #ifndef __IMMEDIATE_PREFIX__
>> 49 #define __IMMEDIATE_PREFIX__ #
>> 50 #endif
>> 51
>> 52 /* ANSI concatenation macros. */
>> 53
>> 54 #define CONCAT1(a, b) CONCAT2(a, b)
>> 55 #define CONCAT2(a, b) a ## b
>> 56
>> 57 /* Use the right prefix for global labels. */
>> 58
>> 59 #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
>> 60
>> 61 /* Use the right prefix for registers. */
>> 62
>> 63 #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
>> 64
>> 65 /* Use the right prefix for immediate values. */
>> 66
>> 67 #define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__, x)
>> 68
>> 69 #define d0 REG (d0)
>> 70 #define d1 REG (d1)
>> 71 #define d2 REG (d2)
>> 72 #define d3 REG (d3)
>> 73 #define d4 REG (d4)
>> 74 #define d5 REG (d5)
>> 75 #define d6 REG (d6)
>> 76 #define d7 REG (d7)
>> 77 #define a0 REG (a0)
>> 78 #define a1 REG (a1)
>> 79 #define a2 REG (a2)
>> 80 #define a3 REG (a3)
>> 81 #define a4 REG (a4)
>> 82 #define a5 REG (a5)
>> 83 #define a6 REG (a6)
>> 84 #define fp REG (fp)
>> 85 #define sp REG (sp)
>> 86
>> 87 .text
>> 88 .proc
>> 89 .globl SYM (__modsi3)
>> 90 SYM (__modsi3):
>> 91 movel sp@(8), d1 /* d1 = divisor */
>> 92 movel sp@(4), d0 /* d0 = dividend */
>> 93 movel d1, sp@-
>> 94 movel d0, sp@-
>> 95 jbsr SYM (__divsi3)
>> 96 addql IMM (8), sp
>> 97 movel sp@(8), d1 /* d1 = divisor */
>> 98 #if !(defined(__mcf5200__) || defined(__mcoldfire__))
>> 99 movel d1, sp@-
>> 100 movel d0, sp@-
>> 101 jbsr SYM (__mulsi3) /* d0 = (a/b)*b */
>> 102 addql IMM (8), sp
>> 103 #else
>> 104 mulsl d1,d0
>> 105 #endif
>> 106 movel sp@(4), d1 /* d1 = dividend */
>> 107 subl d0, d1 /* d1 = a - (a/b)*b */
>> 108 movel d1, d0
>> 109 rts
>> 110
>> 111 EXPORT_SYMBOL(__modsi3)
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