Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* More subroutines needed by GCC output code on some machines. */ |
2 | /* Compile this one with gcc. */ | |
3 | /* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | /* As a special exception, if you link this library with other files, | |
23 | some of which are compiled with GCC, to produce an executable, | |
24 | this library does not by itself cause the resulting executable | |
25 | to be covered by the GNU General Public License. | |
26 | This exception does not however invalidate any other reasons why | |
27 | the executable file might be covered by the GNU General Public License. | |
28 | */ | |
29 | /* support functions required by the kernel. based on code from gcc-2.95.3 */ | |
30 | /* I Molton 29/07/01 */ | |
31 | ||
32 | #include "gcclib.h" | |
33 | ||
34 | #define umul_ppmm(xh, xl, a, b) \ | |
35 | {register USItype __t0, __t1, __t2; \ | |
36 | __asm__ ("%@ Inlined umul_ppmm \n\ | |
37 | mov %2, %5, lsr #16 \n\ | |
38 | mov %0, %6, lsr #16 \n\ | |
39 | bic %3, %5, %2, lsl #16 \n\ | |
40 | bic %4, %6, %0, lsl #16 \n\ | |
41 | mul %1, %3, %4 \n\ | |
42 | mul %4, %2, %4 \n\ | |
43 | mul %3, %0, %3 \n\ | |
44 | mul %0, %2, %0 \n\ | |
45 | adds %3, %4, %3 \n\ | |
46 | addcs %0, %0, #65536 \n\ | |
47 | adds %1, %1, %3, lsl #16 \n\ | |
48 | adc %0, %0, %3, lsr #16" \ | |
49 | : "=&r" ((USItype) (xh)), \ | |
50 | "=r" ((USItype) (xl)), \ | |
51 | "=&r" (__t0), "=&r" (__t1), "=r" (__t2) \ | |
52 | : "r" ((USItype) (a)), \ | |
53 | "r" ((USItype) (b)));} | |
54 | ||
55 | ||
56 | #define __umulsidi3(u, v) \ | |
57 | ({DIunion __w; \ | |
58 | umul_ppmm (__w.s.high, __w.s.low, u, v); \ | |
59 | __w.ll; }) | |
60 | ||
61 | ||
62 | DItype | |
63 | __muldi3 (DItype u, DItype v) | |
64 | { | |
65 | DIunion w; | |
66 | DIunion uu, vv; | |
67 | ||
68 | uu.ll = u, | |
69 | vv.ll = v; | |
70 | ||
71 | w.ll = __umulsidi3 (uu.s.low, vv.s.low); | |
72 | w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high | |
73 | + (USItype) uu.s.high * (USItype) vv.s.low); | |
74 | ||
75 | return w.ll; | |
76 | } | |
77 |