/[pearpc]/src/cpu/cpu_jitc_x86/ppc_tools.h
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Annotation of /src/cpu/cpu_jitc_x86/ppc_tools.h

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Wed Sep 5 17:11:21 2007 UTC (12 years, 3 months ago) by dpavlin
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1 dpavlin 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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