1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/* 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: float.c
* Abstract: floating word set
*/
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "yforth.h"
#include "core.h"
#include "float.h"
/**************************************************************************/
/* WORDS ******************************************************************/
/**************************************************************************/
void _to_float() {
register Cell len = *sp++;
register Char *s = (Char *) *sp;
extern Char *s_tmp_buffer[];
Char *endptr;
memcpy(s_tmp_buffer, s, len);
if (toupper(s[len - 1]) == 'E' || toupper(s[len - 1]) == 'D') s[len++] = '0';
s[len] = '\0';
*--fp = (Real) strtod(s, &endptr);
if (!*endptr) *sp = FFLAG(1);
else {
*sp = FFLAG(0);
fp++;
}
}
void _d_to_f() {
register DCell d = GET_DCELL(sp);
*--fp = (Real) d;
sp += 2;
}
void _f_store() {
register Real *addr = (Real *) *sp++;
*addr = *fp++;
}
void _f_star() {
fp[1] *= fp[0];
fp++;
}
void _f_plus() {
fp[1] += fp[0];
fp++;
}
void _f_minus() {
fp[1] -= fp[0];
fp++;
}
void _f_slash() {
fp[1] /= fp[0];
fp++;
}
void _f_zero_less() {
sp--;
*sp = FFLAG(*fp < 0.0);
fp++;
}
void _f_zero_equals() {
sp--;
*sp = FFLAG(*fp == 0.0);
fp++;
}
void _f_less_than() {
sp--;
*sp = FFLAG(fp[1] < fp[0]);
fp += 2;
}
void _f_to_d() {
register DCell d = (DCell) *fp++;
sp -= 2;
PUT_DCELL(sp, d);
}
void _f_fetch() {
*--fp = *((Real *) *sp++);
}
void _f_constant() {
register Real r = *fp++;
create_definition(A_FCONSTANT);
compile_real(r);
mark_word(_last);
}
void _f_depth() {
*--sp = fp_top - fp;
}
void _f_drop() {
fp++;
}
void _f_dupe() {
fp--;
fp[0] = fp[1];
}
void _f_literal() {
compile_cell((Cell) _do_fliteral);
compile_real(fp[0]);
fp++;
}
void _float_plus() {
sp[0] += sizeof(Real);
}
void _floats() {
sp[0] *= sizeof(Real);
}
void _floor() {
fp[0] = floor(fp[0]);
}
void _f_max() {
if (fp[0] > fp[1]) fp[1] = fp[0];
fp++;
}
void _f_min() {
if (fp[0] < fp[1]) fp[1] = fp[0];
fp++;
}
void _f_negate() {
fp[0] = -fp[0];
}
void _f_over() {
fp--;
fp[0] = fp[2];
}
void _f_rote() {
register Real temp = fp[0];
fp[0] = fp[2];
fp[2] = fp[1];
fp[1] = temp;
}
void _f_round() {
fp[0] = floor(fp[0] + 0.5);
}
void _f_swap() {
register Real temp = fp[0];
fp[0] = fp[1];
fp[1] = temp;
}
void _f_variable() {
create_definition(A_FVARIABLE);
compile_real(0.0);
mark_word(_last);
}
void _represent() {
register Real x = *fp++;
register int m;
register int sign = 0;
static char buf[128];
if (x < 0.0) {
sign = 1;
x = -x;
}
if (x != 0.0) {
m = (int) floor(log10(x)) + 1;
x /= pow(10, m);
if (x >= 1.0) {
x /= 10;
m++;
}
} else m = 0;
sprintf(buf, "%0.*f", sp[0], x);
strncpy((Char *) sp[1], buf + 2, sp[0]);
sp--;
sp[2] = m;
sp[1] = FFLAG(sign);
sp[0] = FFLAG(1);
}
|
