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/* yForth? - A Forth interpreter written in ANSI C
* Copyright (C) 2012 Luca Padovani
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
* ------------------------------------------------------------------------
* Module name: double.c
* Abstract: double-number word set
*/
#include <stdio.h>
#include "yforth.h"
#include "core.h"
#include "double.h"
/**************************************************************************/
/* WORDS ******************************************************************/
/**************************************************************************/
void _two_constant() {
register DCell d = GET_DCELL(sp);
sp += 2;
create_definition(A_2CONSTANT);
compile_cell((Cell) d);
compile_cell((Cell) (d >> CellBits));
mark_word(_last);
}
void _two_literal() {
compile_cell((Cell) _do_literal);
compile_cell((Cell) sp[1]);
compile_cell((Cell) _do_literal);
compile_cell((Cell) sp[0]);
sp += 2;
}
void _two_variable() {
create_definition(A_2VARIABLE);
compile_cell(0);
compile_cell(0);
mark_word(_last);
}
void _d_plus() {
register DCell d1 = GET_DCELL(sp + 2);
register DCell d2 = GET_DCELL(sp);
d1 += d2;
sp += 2;
PUT_DCELL(sp, d1);
}
void _d_minus() {
register DCell d1 = GET_DCELL(sp + 2);
register DCell d2 = GET_DCELL(sp);
d1 -= d2;
sp += 2;
PUT_DCELL(sp, d1);
}
void _d_dot() {
register DCell u = GET_DCELL(sp);
register int usign = u < 0;
if (usign) u = -u;
PUT_DCELL(sp, u);
_less_number_sign();
_number_sign_s();
if (usign) {
*--sp = '-';
_hold();
}
_number_sign_greater();
_type();
putchar(' ');
}
void _d_dot_r() {
register Cell r = *sp++;
register DCell u = GET_DCELL(sp);
register int usign = u < 0;
if (usign && _base == 10) u = -u;
PUT_DCELL(sp, u);
_less_number_sign();
_number_sign_s();
if (usign) {
*--sp = '-';
_hold();
}
_number_sign_greater();
if (sp[0] < r) {
sp--;
sp[0] = r - sp[1];
_spaces();
}
_type();
putchar(' ');
}
void _d_zero_less() {
register DCell d = GET_DCELL(sp);
sp++;
sp[0] = FFLAG(d < 0);
}
void _d_zero_equals() {
register DCell d = GET_DCELL(sp);
sp++;
sp[0] = FFLAG(d == 0);
}
void _d_two_star() {
register DCell d = GET_DCELL(sp);
d <<= 1;
PUT_DCELL(sp, d);
}
void _d_two_slash() {
register DCell d = GET_DCELL(sp);
d >>= 1;
PUT_DCELL(sp, d);
}
void _d_less_than() {
register DCell d1 = GET_DCELL(sp + 2);
register DCell d2 = GET_DCELL(sp);
sp += 3;
sp[0] = FFLAG(d1 < d2);
}
void _d_equals() {
register DCell d1 = GET_DCELL(sp + 2);
register DCell d2 = GET_DCELL(sp);
sp += 3;
sp[0] = FFLAG(d1 == d2);
}
void _dabs() {
register DCell d = GET_DCELL(sp);
d = d > 0 ? d : -d;
PUT_DCELL(sp, d);
}
void _dmax() {
register DCell d1 = GET_DCELL(sp + 2);
register DCell d2 = GET_DCELL(sp);
sp += 2;
if (d2 > d1) PUT_DCELL(sp, d2);
}
void _dmin() {
register DCell d1 = GET_DCELL(sp + 2);
register DCell d2 = GET_DCELL(sp);
sp += 2;
if (d2 < d1) PUT_DCELL(sp, d2);
}
void _dnegate() {
register DCell d = -GET_DCELL(sp);
PUT_DCELL(sp, d);
}
void _m_star_slash() {
register Cell n2 = *sp++;
register Cell n1 = *sp++;
register DCell d = GET_DCELL(sp);
d = (d * n1) / n2;
PUT_DCELL(sp, d);
}
void _m_plus() {
_s_to_d();
_d_plus();
}
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