/[pearpc]/src/cpu/cpu_jitc_x86/ppc_tools.h
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /src/cpu/cpu_jitc_x86/ppc_tools.h

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Revision 1 - (show annotations)
Wed Sep 5 17:11:21 2007 UTC (12 years, 2 months ago) by dpavlin
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1 /*
2 * PearPC
3 * ppc_tools.h
4 *
5 * Copyright (C) 2003 Sebastian Biallas (sb@biallas.net)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 #ifndef __PPC_TOOLS_H__
22 #define __PPC_TOOLS_H__
23
24 #include "system/arch/sysendian.h"
25
26 static inline __attribute__((const)) bool ppc_carry_3(uint32 a, uint32 b, uint32 c)
27 {
28 register uint8 t;
29 asm (
30 "addl %2, %1\n\t"
31 "setc %0\n\t"
32 "addl %3, %1\n\t"
33 "adcb $0, %0"
34 : "=&q" (t), "+&r" (a)
35 : "g" (b), "g" (c)
36 );
37 return t;
38 }
39 /*
40 equivalent C-construction:
41 static inline __attribute__((const)) bool ppc_carry_3(uint32 a, uint32 b, uint32 c)
42 {
43 if ((a+b) < a) {
44 return true;
45 }
46 if ((a+b+c) < c) {
47 return true;
48 }
49 return false;
50 }
51 */
52
53 static inline __attribute__((const)) uint32 ppc_word_rotl(uint32 data, int n)
54 {
55 n &= 0x1f;
56 return (data << n) | (data >> (32-n));
57 }
58
59 #endif

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