/*
 *  operations for finsh shell.
 *
 * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
 *
 *  This file is part of RT-Thread (http://www.rt-thread.org)
 *  Maintainer: bernard.xiong <bernard.xiong at gmail.com>
 *
 *  All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2010-03-22     Bernard      first version
 */
#include "finsh_ops.h"
#include "finsh_vm.h"

#define OP_BIN_BYTE(x)  do {\
        (finsh_sp - 2)->char_value = (finsh_sp - 2)->char_value x (finsh_sp - 1)->char_value; \
        finsh_sp--; \
    }while (0)

#define OP_BIN_WORD(x)  do {\
        (finsh_sp - 2)->short_value = (finsh_sp - 2)->short_value x (finsh_sp - 1)->short_value; \
        finsh_sp--; \
    }while (0)

#define OP_BIN_DWORD(x)  do {\
        (finsh_sp - 2)->long_value = (finsh_sp - 2)->long_value x (finsh_sp - 1)->long_value; \
        finsh_sp--; \
    }while (0)

/* --- noop --- */
void OP_no_op()
{
	/* none */
	return ;
}

/* --- add --- */
void OP_add_byte()
{
    OP_BIN_BYTE(+);

	return ;
}

void OP_add_word()
{
    OP_BIN_WORD(+);

	return ;
}

void OP_add_dword()
{
    OP_BIN_DWORD(+);

	return ;
}

/* --- sub --- */
void OP_sub_byte()
{
	OP_BIN_BYTE(-);

	return ;
}

void OP_sub_word()
{
	OP_BIN_WORD(-);

	return ;
}

void OP_sub_dword()
{
	OP_BIN_DWORD(-);

	return ;
}

/* --- div --- */
void OP_div_byte()
{
	OP_BIN_BYTE(/);

	return ;
}

void OP_div_word()
{
	OP_BIN_WORD(/);

	return ;
}

void OP_div_dword()
{
	OP_BIN_DWORD(/);

	return ;
}

/* --- mod --- */
void OP_mod_byte()
{
	OP_BIN_BYTE(%);

	return ;
}

void OP_mod_word()
{
	OP_BIN_WORD(%);

	return ;
}

void OP_mod_dword()
{
	OP_BIN_DWORD(%);

	return ;
}

/* --- mul --- */
void OP_mul_byte()
{
    OP_BIN_BYTE(*);

	return ;
}

void OP_mul_word()
{
	OP_BIN_WORD(*);

	return ;
}

void OP_mul_dword()
{
	OP_BIN_DWORD(*);

	return ;
}

/* --- and --- */
void OP_and_byte()
{
	OP_BIN_BYTE(&);

	return ;
}

void OP_and_word()
{
	OP_BIN_WORD(&);

	return ;
}

void OP_and_dword()
{
	OP_BIN_DWORD(&);

	return ;
}

/* --- or --- */
void OP_or_byte()
{
	OP_BIN_BYTE(|);

	return ;
}

void OP_or_word()
{
	OP_BIN_WORD(|);

	return ;
}

void OP_or_dword()
{
	OP_BIN_DWORD(|);

	return ;
}

/* --- xor --- */
void OP_xor_byte()
{
	OP_BIN_BYTE(^);

	return ;
}

void OP_xor_word()
{
	OP_BIN_WORD(^);

	return ;
}

void OP_xor_dword()
{
	OP_BIN_DWORD(^);

	return ;
}

/* --- bw --- */
void OP_bw_byte()
{
	(finsh_sp - 1)->char_value = ~ ((finsh_sp - 1)->char_value);

	return ;
}

void OP_bw_word()
{
	(finsh_sp - 1)->short_value = ~ ((finsh_sp - 1)->short_value);

	return ;
}

void OP_bw_dword()
{
	(finsh_sp - 1)->long_value = ~ ((finsh_sp - 1)->long_value);

	return ;
}

/* --- shl --- */
void OP_shl_byte()
{
	OP_BIN_BYTE(<<);

	return ;
}

void OP_shl_word()
{
	OP_BIN_WORD(<<);

	return ;
}

void OP_shl_dword()
{
	OP_BIN_DWORD(<<);

	return ;
}

/* --- shr --- */
void OP_shr_byte()
{
	OP_BIN_BYTE(>>);

	return ;
}

void OP_shr_word()
{
	OP_BIN_WORD(>>);

	return ;
}

void OP_shr_dword()
{
	OP_BIN_DWORD(>>);

	return ;
}

/* --- ld --- */
void OP_ld_byte()
{
	finsh_sp->char_value = *finsh_pc;

	finsh_sp++;
	finsh_pc++;

	return ;
}

void OP_ld_word()
{
	finsh_sp->short_value = FINSH_GET16(finsh_pc);

	finsh_sp ++;
	finsh_pc += 2;

	return ;
}

void OP_ld_dword()
{
	finsh_sp->long_value = FINSH_GET32(finsh_pc);

	finsh_sp ++;
	finsh_pc += 4;

	return ;
}

void OP_ld_value_byte()
{
	char* c;

	c = (char*) (FINSH_GET32(finsh_pc));

	finsh_sp->char_value = *c;

	finsh_sp ++;
	finsh_pc += 4;

	return;
}

void OP_ld_value_byte_stack()
{
	char* c;

	c = (char *)(finsh_sp - 1)->long_value;
	(finsh_sp - 1)->char_value = *c;

	return;
}

void OP_ld_value_word()
{
	short* s;

	s = (short*) (FINSH_GET32(finsh_pc));

	finsh_sp->short_value = *s;

	finsh_sp ++;
	finsh_pc += 4;

	return;
}

void OP_ld_value_word_stack()
{
	short* s;

	s = (short *)(finsh_sp - 1)->long_value;
	(finsh_sp - 1)->short_value = *s;

	return;
}

void OP_ld_value_dword()
{
	long* l;

	l = (long*) (FINSH_GET32(finsh_pc));

	finsh_sp->long_value = *l;

	finsh_sp ++;
	finsh_pc += 4;

	return;
}

void OP_ld_value_dword_stack()
{
	long* l;

	l = (long *)(finsh_sp - 1)->long_value;
	(finsh_sp - 1)->long_value = *l;

	return;
}

/* --- st --- */
/*
 * 2006-4-16 bernard
 * fixed the sp move bug
 */
void OP_st_byte()
{
	*(char*)((finsh_sp - 2)->long_value) = (finsh_sp - 1)->char_value;
	finsh_sp --;

	return ;
}

/*
 * 2006-4-16 bernard
 * fixed the sp move bug
 */
void OP_st_word()
{
	*(short*)((finsh_sp - 2)->long_value) = (finsh_sp - 1)->short_value;
	finsh_sp --;

	return ;
}

/*
 * 2006-4-16 bernard
 * fixed the sp move bug
 */
void OP_st_dword()
{
	*(long*)((finsh_sp - 2)->long_value) = (finsh_sp - 1)->long_value;
	finsh_sp --;

	return ;
}

/* --- pop --- */
void OP_pop()
{
	finsh_sp --;
	return ;
}

/* --- call --- */
void OP_call()
{
	/* the max number of arg*/
	unsigned long parameterv[16];
	unsigned int  parameters, i;

	typedef unsigned long var_t;
	typedef var_t (*op_func)();
	op_func f;
	var_t   r;

	parameters = *finsh_pc ++;

	i = 0; finsh_sp --;
	while (i < parameters)
	{
		parameterv[parameters - 1 - i] = finsh_sp->long_value;
		finsh_sp --;
		i++;
	}

	f = (op_func)(finsh_sp->long_value);
	switch (parameters)
	{
	case 0:
		r = f(0);
		break;

	case 1:
		r = f(parameterv[0]);
		break;

	case 2:
		r = f(parameterv[0], parameterv[1]);
		break;

	case 3:
		r = f(parameterv[0], parameterv[1], parameterv[2]);
		break;

	case 4:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3]);
		break;

	case 5:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4]);
		break;

	case 6:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5]);
		break;

	case 7:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5], parameterv[6]);
		break;

	case 8:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5], parameterv[6], parameterv[7]);
		break;

	case 9:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5], parameterv[6], parameterv[7],
				parameterv[8]);
		break;

	case 10:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5], parameterv[6], parameterv[7],
				parameterv[8], parameterv[9]);
		break;

	case 11:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5], parameterv[6], parameterv[7],
				parameterv[8], parameterv[9], parameterv[10]);
		break;

	case 12:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5], parameterv[6], parameterv[7],
				parameterv[8], parameterv[9], parameterv[10], parameterv[11]);
		break;

	case 13:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5], parameterv[6], parameterv[7],
				parameterv[8], parameterv[9], parameterv[10], parameterv[11],
				parameterv[12]);
		break;

	case 14:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5], parameterv[6], parameterv[7],
				parameterv[8], parameterv[9], parameterv[10], parameterv[11],
				parameterv[12], parameterv[13]);
		break;

	case 15:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5], parameterv[6], parameterv[7],
				parameterv[8], parameterv[9], parameterv[10], parameterv[11],
				parameterv[12], parameterv[13], parameterv[14]);
		break;

	case 16:
		r = f(parameterv[0], parameterv[1], parameterv[2], parameterv[3],
				parameterv[4], parameterv[5], parameterv[6], parameterv[7],
				parameterv[8], parameterv[9], parameterv[10], parameterv[11],
				parameterv[12], parameterv[13], parameterv[14], parameterv[15]);
		break;

	default:
		r = 0;
		break;
	}

	finsh_sp->long_value = r;
	finsh_sp ++;

	return ;
}

const op_func op_table[] =
{
	/* 00 */ OP_no_op,
	/* 01 */ OP_add_byte,
	/* 02 */ OP_add_word,
	/* 03 */ OP_add_dword,
	/* 04 */ OP_sub_byte,
	/* 05 */ OP_sub_word,
	/* 06 */ OP_sub_dword,
	/* 07 */ OP_div_byte,
	/* 08 */ OP_div_word,
	/* 09 */ OP_div_dword,
	/* 10 */ OP_mod_byte,
	/* 11 */ OP_mod_word,
	/* 12 */ OP_mod_dword,
	/* 13 */ OP_mul_byte,
	/* 14 */ OP_mul_word,
	/* 15 */ OP_mul_dword,
	/* 16 */ OP_and_byte,
	/* 17 */ OP_and_word,
	/* 18 */ OP_and_dword,
	/* 19 */ OP_or_byte,
	/* 20 */ OP_or_word,
	/* 21 */ OP_or_dword,
	/* 22 */ OP_xor_byte,
	/* 23 */ OP_xor_word,
	/* 24 */ OP_xor_dword,
	/* 25 */ OP_bw_byte,
	/* 26 */ OP_bw_word,
	/* 27 */ OP_bw_dword,
	/* 28 */ OP_shl_byte,
	/* 29 */ OP_shl_word,
	/* 30 */ OP_shl_dword,
	/* 31 */ OP_shr_byte,
	/* 32 */ OP_shr_word,
	/* 33 */ OP_shr_dword,
	/* 34 */ OP_ld_byte,
	/* 35 */ OP_ld_word,
	/* 36 */ OP_ld_dword,
	/* 37 */ OP_ld_value_byte,
	/* 38 */ OP_ld_value_word,
	/* 39 */ OP_ld_value_dword,
	/* 40 */ OP_st_byte,
	/* 41 */ OP_st_word,
	/* 42 */ OP_st_dword,
	/* 43 */ OP_pop,
	/* 44 */ OP_call,
	/* 45 */ OP_ld_value_byte_stack,
	/* 46 */ OP_ld_value_word_stack,
	/* 47 */ OP_ld_value_dword_stack,
	NULL
};
