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_divsi3) !! 8 Free Software Foundation; either version 2, or (at your option) any
9 { !! 9 later version.
10 p0 = cmp.gt(r0,#-1) !! 10
11 p1 = cmp.gt(r1,#-1) !! 11 In addition to the permissions in the GNU General Public License, the
12 r3:2 = vabsw(r1:0) !! 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 p3 = xor(p0,p1) !! 15 file. (The General Public License restrictions do apply in other
16 r4 = sub(r2,r3) !! 16 respects; for example, they cover modification of the file, and
17 r6 = cl0(r2) !! 17 distribution when not linked into another program.)
18 p0 = cmp.gtu(r3,r2) !! 18
19 } !! 19 This file is distributed in the hope that it will be useful, but
20 { !! 20 WITHOUT ANY WARRANTY; without even the implied warranty of
21 r0 = mux(p3,#-1,#1) !! 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 r7 = cl0(r3) !! 22 General Public License for more details. */
23 p1 = cmp.gtu(r3,r4) !! 23
24 } !! 24 /* As a special exception, if you link this library with files
25 { !! 25 compiled with GCC to produce an executable, this does not cause
26 r0 = mux(p0,#0,r0) !! 26 the resulting executable to be covered by the GNU General Public License.
27 p0 = or(p0,p1) !! 27 This exception does not however invalidate any other reasons why
28 if (p0.new) jumpr:nt r31 !! 28 the executable file might be covered by the GNU General Public License. */
29 r6 = sub(r7,r6) !! 29
30 } !! 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 r7 = r6 !! 32 Some of this code comes from MINIX, via the folks at ericsson.
33 r5:4 = combine(#1,r3) !! 33 D. V. Henkel-Wallace (gumby@cygnus.com) Fete Bastille, 1992
34 r6 = add(#1,lsr(r6,#1)) !! 34 */
35 p0 = cmp.gtu(r6,#4) !! 35
36 } !! 36 #include <asm/export.h>
37 { !! 37
38 r5:4 = vaslw(r5:4,r7) !! 38 /* These are predefined by new versions of GNU cpp. */
39 if (!p0) r6 = #3 !! 39
40 } !! 40 #ifndef __USER_LABEL_PREFIX__
41 { !! 41 #define __USER_LABEL_PREFIX__ _
42 loop0(1f,r6) !! 42 #endif
43 r7:6 = vlsrw(r5:4,#1) !! 43
44 r1:0 = #0 !! 44 #ifndef __REGISTER_PREFIX__
45 } !! 45 #define __REGISTER_PREFIX__
46 .falign !! 46 #endif
47 1: !! 47
48 { !! 48 #ifndef __IMMEDIATE_PREFIX__
49 r5:4 = vlsrw(r5:4,#2) !! 49 #define __IMMEDIATE_PREFIX__ #
50 if (!p0.new) r0 = add(r0,r5) !! 50 #endif
51 if (!p0.new) r2 = sub(r2,r4) !! 51
52 p0 = cmp.gtu(r4,r2) !! 52 /* ANSI concatenation macros. */
53 } !! 53
54 { !! 54 #define CONCAT1(a, b) CONCAT2(a, b)
55 r7:6 = vlsrw(r7:6,#2) !! 55 #define CONCAT2(a, b) a ## b
56 if (!p0.new) r0 = add(r0,r7) !! 56
57 if (!p0.new) r2 = sub(r2,r6) !! 57 /* Use the right prefix for global labels. */
58 p0 = cmp.gtu(r6,r2) !! 58
59 }:endloop0 !! 59 #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
60 { !! 60
61 if (!p0) r0 = add(r0,r7) !! 61 /* Use the right prefix for registers. */
62 } !! 62
63 { !! 63 #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
64 if (p3) r0 = sub(r1,r0) !! 64
65 jumpr r31 !! 65 /* Use the right prefix for immediate values. */
66 } !! 66
67 SYM_FUNC_END(__hexagon_divsi3) !! 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 (__divsi3)
>> 90 SYM (__divsi3):
>> 91 movel d2, sp@-
>> 92
>> 93 moveq IMM (1), d2 /* sign of result stored in d2 (=1 or =-1) */
>> 94 movel sp@(12), d1 /* d1 = divisor */
>> 95 jpl L1
>> 96 negl d1
>> 97 #if !(defined(__mcf5200__) || defined(__mcoldfire__))
>> 98 negb d2 /* change sign because divisor <0 */
>> 99 #else
>> 100 negl d2 /* change sign because divisor <0 */
>> 101 #endif
>> 102 L1: movel sp@(8), d0 /* d0 = dividend */
>> 103 jpl L2
>> 104 negl d0
>> 105 #if !(defined(__mcf5200__) || defined(__mcoldfire__))
>> 106 negb d2
>> 107 #else
>> 108 negl d2
>> 109 #endif
>> 110
>> 111 L2: movel d1, sp@-
>> 112 movel d0, sp@-
>> 113 jbsr SYM (__udivsi3) /* divide abs(dividend) by abs(divisor) */
>> 114 addql IMM (8), sp
>> 115
>> 116 tstb d2
>> 117 jpl L3
>> 118 negl d0
>> 119
>> 120 L3: movel sp@+, d2
>> 121 rts
>> 122
>> 123 EXPORT_SYMBOL(__divsi3)
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