1 /* SPDX-License-Identifier: GPL-2.0 */ !! 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
>> 4 This file is part of GNU CC.
>> 5
>> 6 GNU CC is free software; you can redistribute it and/or modify it
>> 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)
3 84
4 /* <<
5 * Multiply operation for 32 bit integers. <<
6 * Input : Operand1 in Reg r5 <<
7 * Operand2 in Reg r6 <<
8 * Output: Result [op1 * op2] in Reg r3 <<
9 */ <<
10 .text 85 .text
11 .globl __mulsi3 !! 86 .proc
12 .type __mulsi3, @function !! 87 .globl SYM (__mulsi3)
13 .ent __mulsi3 !! 88 SYM (__mulsi3):
14 !! 89 movew sp@(4), d0 /* x0 -> d0 */
15 __mulsi3: !! 90 muluw sp@(10), d0 /* x0*y1 */
16 .frame r1, 0, r15 !! 91 movew sp@(6), d1 /* x1 -> d1 */
17 add r3, r0, r0 !! 92 muluw sp@(8), d1 /* x1*y0 */
18 beqi r5, result_is_zero /* multiply !! 93 #if !(defined(__mcf5200__) || defined(__mcoldfire__))
19 beqi r6, result_is_zero /* multiply !! 94 addw d1, d0
20 bgeid r5, r5_pos !! 95 #else
21 xor r4, r5, r6 /* get the sign of !! 96 addl d1, d0
22 rsubi r5, r5, 0 /* make r5 positive !! 97 #endif
23 r5_pos: !! 98 swap d0
24 bgei r6, r6_pos !! 99 clrw d0
25 rsubi r6, r6, 0 /* make r6 positive !! 100 movew sp@(6), d1 /* x1 -> d1 */
26 r6_pos: !! 101 muluw sp@(10), d1 /* x1*y1 */
27 bri l1 !! 102 addl d1, d0
28 l2: <<
29 add r5, r5, r5 <<
30 l1: <<
31 srl r6, r6 <<
32 addc r7, r0, r0 <<
33 beqi r7, l2 <<
34 bneid r6, l2 <<
35 add r3, r3, r5 <<
36 blti r4, negateresult <<
37 rtsd r15, 8 <<
38 nop <<
39 negateresult: <<
40 rtsd r15, 8 <<
41 rsub r3, r3, r0 <<
42 result_is_zero: <<
43 rtsd r15, 8 <<
44 addi r3, r0, 0 <<
45 103
46 .size __mulsi3, . - __mulsi3 !! 104 rts
47 .end __mulsi3 !! 105 EXPORT_SYMBOL(__mulsi3)
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