-
Notifications
You must be signed in to change notification settings - Fork 1
/
Expr.d
328 lines (315 loc) · 11.5 KB
/
Expr.d
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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
import std.stdio : writeln, write;
import std.format : format;
import Node : Node;
import SymbolTable : SymbolTable, Edition;
import Target : gepDim, gepDim2, gepStringDim;
public enum Op { Add, Sub, Mul, Div, Exp, Neg }
public immutable int number_fp_regs = 8;
class Expr : Node {
private int result_reg;
protected void setResult(int r) {
result_reg = r;
}
@property int result() {
return result_reg;
}
override void codegen() {
throw new Exception("CANNOT CALL Expr.codegen()");
}
}
class Constant : Expr {
private int constant;
this(int n) {
constant = n;
}
override void codegen() {
setResult(reg);
writeln(format(" %%%d = load double, double* @_C%d", result, constant));
}
}
class Identifier : Expr {
private int ident;
this(int i) {
ident = i;
symtab.initializeId(ident);
}
override void codegen() {
setResult(reg);
writeln(format(" %%%d = load double, double* %%%s", result, symtab.getId(ident)));
}
}
class Dim : Expr {
private int ident;
this(int i, Expr idx) {
ident = i;
left = idx;
}
override void codegen() {
left.codegen();
auto idx = reg;
writeln(format(" %%%d = fptosi double %%%d to i32", idx, (cast(Expr)left).result));
auto gep = gepDim(this, ident, idx);
setResult(reg);
writeln(format(" %%%d = load double, double* %%%d", result, gep));
}
}
class Dim2 : Expr {
private int ident;
this(int i, Expr idx1, Expr idx2) {
ident = i;
left = new Node(idx1, idx2);
}
override void codegen() {
left.left.codegen();
auto idx1 = reg;
writeln(format(" %%%d = fptosi double %%%d to i32", idx1, (cast(Expr)(left.left)).result));
left.right.codegen();
auto idx2 = reg;
writeln(format(" %%%d = fptosi double %%%d to i32", idx2, (cast(Expr)(left.right)).result));
auto gep = gepDim2(this, ident, idx1, idx2);
setResult(reg);
writeln(format(" %%%d = load double, double* %%%d", result, gep));
}
}
class Operation : Expr {
private Op op;
this(Expr op1, Op o, Expr op2 = null) {
left = op1;
right = op2;
op = o;
}
override void codegen() {
if (left is null) {
throw new Exception("NULL EXPRESSION");
}
left.codegen();
if (right) {
right.codegen();
}
setResult(reg);
switch (op) {
case Op.Add:
writeln(format(" %%%d = fadd double %%%d, %%%d",
result, (cast(Expr)left).result, (cast(Expr)right).result));
break;
case Op.Sub:
writeln(format(" %%%d = fsub double %%%d, %%%d",
result, (cast(Expr)left).result, (cast(Expr)right).result));
break;
case Op.Mul:
writeln(format(" %%%d = fmul double %%%d, %%%d",
result, (cast(Expr)left).result, (cast(Expr)right).result));
break;
case Op.Div:
writeln(format(" %%%d = fdiv double %%%d, %%%d",
result, (cast(Expr)left).result, (cast(Expr)right).result));
break;
case Op.Exp:
if (symtab.edition < Edition.Third) { // recreate bug in early editions
auto pos = result;
writeln(format(" %%%d = call double @fabs(double %%%d)",
pos, (cast(Expr)left).result));
setResult(reg);
writeln(format(" %%%d = call double @pow(double %%%d, double %%%d)",
result, pos, (cast(Expr)right).result));
}
else {
writeln(format(" %%%d = call double @pow(double %%%d, double %%%d)",
result, (cast(Expr)left).result, (cast(Expr)right).result));
}
break;
case Op.Neg:
writeln(format(" %%%d = fneg double %%%d", result, (cast(Expr)left).result));
break;
default:
throw new Exception("BAD Op");
}
}
}
class MathFn : Expr {
private string fn_ident;
this(string fn_id, Expr e) {
fn_ident = fn_id;
left = e;
if (symtab.edition < Edition.Third && fn_ident == "SGN") {
symtab.error("INVALID FUNCTION FOR THIS EDITION");
}
}
override void codegen() {
if (fn_ident != "RND") {
left.codegen();
}
setResult(reg);
switch (fn_ident) {
case "SQR":
writeln(format(" %%%d = call double @sqrt(double %%%d)",
result, (cast(Expr)left).result));
break;
case "SIN":
writeln(format(" %%%d = call double @sin(double %%%d)",
result, (cast(Expr)left).result));
break;
case "COS":
writeln(format(" %%%d = call double @cos(double %%%d)",
result, (cast(Expr)left).result));
break;
case "TAN":
writeln(format(" %%%d = call double @tan(double %%%d)",
result, (cast(Expr)left).result));
break;
case "COT": // user function
writeln(format(" %%%d = call double @cot(double %%%d)",
result, (cast(Expr)left).result));
break;
case "ASN":
writeln(format(" %%%d = call double @asin(double %%%d)",
result, (cast(Expr)left).result));
break;
case "ACS":
writeln(format(" %%%d = call double @acos(double %%%d)",
result, (cast(Expr)left).result));
break;
case "ATN":
writeln(format(" %%%d = call double @atan(double %%%d)",
result, (cast(Expr)left).result));
break;
case "INT":
if (symtab.edition >= Edition.Third) {
writeln(format(" %%%d = call double @floor(double %%%d)",
result, (cast(Expr)left).result));
}
else {
int compare_result = result;
writeln(format(" %%%d = fcmp oge double %%%d, 0.0",
compare_result, (cast(Expr)left).result));
auto floor_result = reg;
writeln(format(" %%%d = call double @floor(double %%%d)",
floor_result, (cast(Expr)left).result));
auto ceil_result = reg;
writeln(format(" %%%d = call double @ceil(double %%%d)",
ceil_result, (cast(Expr)left).result));
setResult(reg);
writeln(format(" %%%d = select i1 %%%d, double %%%d, double %%%d",
result, compare_result, floor_result, ceil_result));
}
break;
case "LOG":
writeln(format(" %%%d = call double @log(double %%%d)",
result, (cast(Expr)left).result));
break;
case "EXP":
writeln(format(" %%%d = call double @exp(double %%%d)",
result, (cast(Expr)left).result));
break;
case "RND":
writeln(format(" %%%d = call double @random_lcg(i32 0)", result));
break;
case "ABS":
writeln(format(" %%%d = call double @fabs(double %%%d)",
result, (cast(Expr)left).result));
break;
case "SGN": // user function
writeln(format(" %%%d = call double @sgn(double %%%d)",
result, (cast(Expr)left).result));
break;
default:
throw new Exception("BAD MathFn");
}
}
}
class FnCall : Expr {
private int fn_id, ret;
private Expr[] args;
this(int n, Expr[] e) {
fn_id = n;
args = e;
symtab.addFunction(n, symtab.Function(new int[0], null, -1, e.length));
symtab.installId("FN" ~ symtab.getId(fn_id));
ret = symtab.gosub; // note: only used my multi-line functions
}
override void codegen() {
auto func = symtab.getFunction(fn_id);
foreach(i, arg; args) {
arg.codegen();
writeln(format(" store double %%%d, double* %%%s",
(cast(Expr)arg).result, symtab.getId(func.param_idents[i])));
}
if (func.fn_expr !is null) {
func.fn_expr.codegen();
setResult(func.fn_expr.result);
symtab.simpleFunction(ret);
}
else {
auto ptr = reg;
writeln(format(" %%%d = load i32, i32* %%_RETURN_P", ptr));
auto inc = reg;
writeln(format(" %%%d = add i32 %%%d, 1", inc, ptr));
auto cmp = reg;
writeln(format(" %%%d = icmp ne i32 %%%d, %d", cmp, inc, symtab.max_depth));
auto fct = reg;
writeln(format(" %%%d = select i1 %%%d, void (i32, i16)* @dummy_fct, void (i32, i16)* @runtime_error", fct, cmp));
writeln(format(" call void %%%d(i32 2, i16 %d)", fct, symtab.line)); // error: too many nested calls
writeln(format(" store i32 %%%d, i32* %%_RETURN_P", inc));
auto gep = reg;
writeln(format(" %%%d = getelementptr [%d x i32], [%d x i32]* %%_RETURN, i32 0, i32 %%%d",
gep, symtab.max_depth, symtab.max_depth, ptr));
writeln(format(" store i32 %d, i32* %%%d", ret, gep));
writeln(" br label %.", func.fn_line);
writeln(" return", ret, ":");
setResult(reg);
writeln(format(" %%%d = load double, double* %%FN%s",
result, symtab.getId(fn_id)));
}
}
}
class StringExpr : Expr {
this() {
// empty
}
override void codegen() {
auto cmp = reg;
writeln(format(" %%%d = icmp ne i8* %%%d, null", cmp, result));
auto fct = reg;
writeln(format(" %%%d = select i1 %%%d, void (i32, i16)* @dummy_fct, void (i32, i16)* @runtime_error", fct, cmp));
writeln(format(" call void %%%d(i32 8, i16 %d)", fct, symtab.line)); // error: uninitialized string
}
}
class StringVariable : StringExpr {
private int ident;
this(int id) {
ident = id;
symtab.initializeString(ident);
}
override void codegen() {
setResult(reg);
writeln(format(" %%%d = load i8*, i8** %%%s_", result, symtab.getId(ident)));
super.codegen();
}
}
class StringConstant : StringExpr {
private int ident;
this(int id) {
ident = id;
}
override void codegen() {
setResult(reg);
writeln(format(" %%%d = bitcast [ %d x i8 ]* @_S%d to i8*", result, symtab.getStrLen(ident) + 1, ident));
super.codegen();
}
}
class StringIndexed : StringExpr {
private int ident;
this(int id, Expr idx) {
ident = id;
left = idx;
}
override void codegen() {
left.codegen();
auto idx = reg;
writeln(format(" %%%d = fptosi double %%%d to i32", idx, (cast(Expr)left).result));
auto gep = gepStringDim(this, ident, idx);
setResult(reg);
writeln(format(" %%%d = load i8*, i8** %%%d", result, gep));
super.codegen();
}
}