cpu/cpu_jitc_x86/ppc_tools.h

/*
 *      PearPC
 *      ppc_tools.h
 *
 *      Copyright (C) 2003 Sebastian Biallas (sb@biallas.net)
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License version 2 as
 *      published by the Free Software Foundation.
 *
 *      This program is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU General Public License for more details.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __PPC_TOOLS_H__
#define __PPC_TOOLS_H__

#include "system/arch/sysendian.h"

static inline __attribute__((const)) bool ppc_carry_3(uint32 a, uint32 b, uint32 c)
{
        register uint8 t;
        asm (
                "addl %2, %1\n\t"
                "setc %0\n\t"
                "addl %3, %1\n\t"
                "adcb $0, %0"
                : "=&q" (t), "+&r" (a)
                :  "g" (b), "g" (c)
        );
        return t;
}
/*
equivalent C-construction:
static inline __attribute__((const)) bool ppc_carry_3(uint32 a, uint32 b, uint32 c)
{
        if ((a+b) < a) {
                return true;
        }
        if ((a+b+c) < c) {
                return true;
        }
        return false;
}
*/

static inline __attribute__((const)) uint32 ppc_word_rotl(uint32 data, int n)
{
        n &= 0x1f;
        return (data << n) | (data >> (32-n));
}

#endif
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