-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathcodegen.sml
458 lines (453 loc) · 17.3 KB
/
codegen.sml
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
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
signature CODEGEN =
sig
structure Frame : FRAME
val codegen : Frame.frame -> Tree.stm -> Assem.instr list
exception Unmatched
end
structure MipsGen : CODEGEN =
struct
structure Frame = MipsFrame
structure A = Assem
structure T = Tree
val calldefs= Frame.callersaves @ [Frame.RV, Frame.RA]
exception Unmatched
fun int2string num = if num >= 0 then (Int.toString num)
else ("-" ^ (Int.toString (~num)))
fun codegen frame stm =
let
val assem_list : A.instr list ref = ref nil
fun emit instr = assem_list := (instr :: !assem_list)
fun munchStm (T.LABEL lab) = emit(
A.LABEL {assem=(Symbol.name lab)^":", lab = lab}
)
| munchStm (T.MOVE (T.TEMP dst,
T.MEM (T.BINOP(T.PLUS, T.TEMP src, T.CONST offset)))) =
emit(A.OPER {
assem="lw `d0, " ^ (int2string offset) ^ "(`s0)",
dst=[dst],
src=[src],
jump=NONE
})
| munchStm (T.MOVE (T.TEMP dst,
T.MEM (T.BINOP(T.PLUS, T.CONST offset, T.TEMP src)))) =
emit(A.OPER {
assem="lw `d0, " ^ (int2string offset) ^ "(`s0)",
dst=[dst],
src=[src],
jump=NONE
})
| munchStm (T.MOVE (T.TEMP dst, T.MEM src_exp)) =
emit(A.OPER {
assem="lw `d0, 0(`s0)",
dst=[dst],
src=[munchExp src_exp],
jump=NONE
})
| munchStm (T.MOVE (T.TEMP dst, T.TEMP src)) =
emit(A.MOVE {
assem="move `d0, `s0",
dst=dst,
src=src
})
| munchStm (T.MOVE (T.TEMP dst, T.CONST c)) =
emit(A.OPER {
assem="li `d0, " ^ (int2string c),
dst=[dst],
src=[],
jump=NONE
})
| munchStm (T.MOVE (T.TEMP dst, T.NAME lab)) =
emit(A.OPER {
assem="la `d0, " ^ (Symbol.name lab),
dst=[dst],
src=[],
jump=NONE
})
| munchStm (T.MOVE (T.TEMP dst, src_exp)) =
emit(A.MOVE {
assem="move `d0, `s0",
dst=dst,
src=munchExp src_exp
})
| munchStm (T.MOVE (
T.MEM (
T.BINOP(T.PLUS, T.TEMP base_addr, T.CONST offset)),
T.TEMP src_val)) =
emit(A.OPER{
assem="sw `s0, " ^(int2string offset) ^"(`s1)",
dst=[],
src=[src_val, base_addr],
jump = NONE
})
| munchStm (T.MOVE (
T.MEM (
T.BINOP(T.PLUS, T.TEMP base_addr, T.CONST offset)),
src_exp)) =
emit(A.OPER{
assem="sw `s0, " ^(int2string offset) ^"(`s1)",
dst=[],
src=[munchExp src_exp, base_addr],
jump = NONE
})
| munchStm (T.MOVE (T.MEM (T.TEMP dst_addr), T.TEMP src_val)) =
emit(A.OPER{
assem="sw `s0, 0(`s1)",
dst=[],
src=[src_val, dst_addr],
jump = NONE
})
| munchStm (T.MOVE (T.MEM (T.TEMP dst_addr), src_exp)) =
emit(A.OPER{
assem="sw `s0, 0(`s1)",
dst=[],
src=[munchExp src_exp, dst_addr],
jump = NONE
})
| munchStm (T.MOVE (T.MEM addr_exp, T.TEMP src_val)) =
emit(A.OPER{
assem="sw `s0, 0(`s1)",
dst=[],
src=[src_val, munchExp addr_exp],
jump = NONE
})
| munchStm (T.MOVE (T.MEM addr_exp, val_exp)) =
emit(A.OPER{
assem="sw `s0, 0(`s1)",
dst=[],
src=[munchExp val_exp, munchExp addr_exp],
jump = NONE
})
| munchStm (T.JUMP ((T.NAME lab), label_list)) =
emit(A.OPER{
assem="j "^(Symbol.name lab),
dst=[],
src=[],
jump =SOME label_list
})
| munchStm (T.JUMP (label_exp, label_list)) =
emit(A.OPER{
assem="jr `s0",
dst=[],
src=[munchExp label_exp],
jump = SOME label_list
})
| munchStm (T.CJUMP (T.EQ, T.TEMP t1, T.TEMP t2, t_label, f_label)) =
emit(A.OPER{
assem="beq `s0, `s1, "^(Symbol.name t_label),
src=[t1, t2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.EQ, exp1, exp2, t_label, f_label)) =
emit(A.OPER{
assem="beq `s0, `s1, "^(Symbol.name t_label),
src=[munchExp exp1, munchExp exp2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.NE, T.TEMP t1, T.TEMP t2, t_label, f_label)) =
emit(A.OPER{
assem="bne `s0, `s1, "^(Symbol.name t_label),
src=[t1, t2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.NE, exp1, exp2, t_label, f_label)) =
emit(A.OPER{
assem="bne `s0, `s1, "^(Symbol.name t_label),
src=[munchExp exp1, munchExp exp2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.LT, T.TEMP t1, T.TEMP t2, t_label, f_label)) =
emit(A.OPER{
assem="blt `s0, `s1, "^(Symbol.name t_label),
src=[t1, t2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.LT, exp1, exp2, t_label, f_label)) =
emit(A.OPER{
assem="blt `s0, `s1, "^(Symbol.name t_label),
src=[munchExp exp1, munchExp exp2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.GT, T.TEMP t1, T.TEMP t2, t_label, f_label)) =
emit(A.OPER{
assem="bgt `s0, `s1, "^(Symbol.name t_label),
src=[t1, t2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.GT, exp1, exp2, t_label, f_label)) =
emit(A.OPER{
assem="bgt `s0, `s1, "^(Symbol.name t_label),
src=[munchExp exp1, munchExp exp2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.LE, T.TEMP t1, T.TEMP t2, t_label, f_label)) =
emit(A.OPER{
assem="ble `s0, `s1, "^(Symbol.name t_label),
src=[t1, t2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.LE, exp1, exp2, t_label, f_label)) =
emit(A.OPER{
assem="ble `s0, `s1, "^(Symbol.name t_label),
src=[munchExp exp1, munchExp exp2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.GE, T.TEMP t1, T.TEMP t2, t_label, f_label)) =
emit(A.OPER{
assem="bge `s0, `s1, "^(Symbol.name t_label),
src=[t1, t2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.CJUMP (T.GE, exp1, exp2, t_label, f_label)) =
emit(A.OPER{
assem="bge `s0, `s1, "^(Symbol.name t_label),
src=[munchExp exp1, munchExp exp2],
dst=[],
jump = SOME [t_label, f_label]
})
| munchStm (T.EXP exp) = (munchExp exp; ())
| munchStm (e) = (
print("uncatched stmt:\n");
Printtree.printtree(TextIO.stdOut, e);
raise Unmatched
)
and result(gen) =
let
val t = Temp.newtemp()
in
gen t;
t
end
and munchArgs (_, []) = []
| munchArgs (n, arg_exp::l) =
if n < 4
then (
emit(A.OPER{
assem="move $a"^(int2string n) ^", `s0",
src=[munchExp arg_exp],
dst=[List.nth (Frame.ARGS, n)],
jump=NONE
});
(List.nth (Frame.ARGS, n))::munchArgs(n+1, l)
) else (
emit(A.OPER{
assem="sw `s0, " ^(int2string (Frame.wordSize * n)) ^"($sp)",
src=[munchExp arg_exp, Frame.SP],
dst=[],
jump=NONE
});
munchArgs(n+1, l)
)
and munchExp (T.BINOP (T.PLUS, T.TEMP src1, T.TEMP src2)) =
result(fn (r)=>
emit(A.OPER{
assem="add `d0, `s0, `s1",
src=[src1, src2],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.PLUS, T.TEMP src, T.CONST const)) =
result(fn (r)=>
emit(A.OPER{
assem="addi `d0, `s0, "^ (int2string const),
src=[src],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.PLUS, T.CONST const, T.TEMP src)) =
result(fn (r)=>
emit(A.OPER{
assem="addi `d0, `s0, "^ (int2string const),
src=[src],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.PLUS, exp1, T.CONST const)) =
result(fn (r)=>
emit(A.OPER{
assem="addi `d0, `s0, " ^(int2string const),
src=[munchExp exp1],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.PLUS, T.CONST const, exp1)) =
result(fn (r)=>
emit(A.OPER{
assem="addi `d0, `s0, " ^(int2string const),
src=[munchExp exp1],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.PLUS, exp1, exp2)) =
result(fn (r)=>
emit(A.OPER{
assem="add `d0, `s0, `s1",
src=[munchExp exp1, munchExp exp2],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.MINUS, T.TEMP src1, T.TEMP src2)) =
result(fn (r)=>
emit(A.OPER{
assem="sub `d0, `s0, `s1",
src=[src1, src2],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.MINUS, exp1, exp2)) =
result(fn (r)=>
emit(A.OPER{
assem="sub `d0, `s0, `s1",
src=[munchExp exp1, munchExp exp2],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.MUL, T.TEMP src1, T.TEMP src2)) =
result(fn (r)=>
emit(A.OPER{
assem="mul `d0, `s0, `s1",
src=[src1, src2],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.MUL, exp1, exp2)) =
result(fn (r)=>
emit(A.OPER{
assem="mul `d0, `s0, `s1",
src=[munchExp exp1, munchExp exp2],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.DIV, T.TEMP src1, T.TEMP src2)) =
result(fn (r)=>
emit(A.OPER{
assem="div `d0, `s0, `s1",
src=[src1, src2],
dst=[r],
jump=NONE
})
)
| munchExp (T.BINOP (T.DIV, exp1, exp2)) =
result(fn (r)=>
emit(A.OPER{
assem="div `d0, `s0, `s1",
src=[munchExp exp1, munchExp exp2],
dst=[r],
jump=NONE
})
)
| munchExp (T.MEM (T.BINOP(T.PLUS, T.TEMP src, T.CONST offset))) =
result (fn (r)=>
emit(A.OPER{
assem="lw `d0, "^(int2string offset)^"(`s0)",
src=[src],
dst=[r],
jump=NONE
})
)
| munchExp (T.MEM (T.BINOP(T.PLUS, src_exp, T.CONST offset))) =
result (fn (r)=>
emit(A.OPER{
assem="lw `d0, "^(int2string offset)^"(`s0)",
src=[munchExp src_exp],
dst=[r],
jump=NONE
})
)
| munchExp (T.MEM (T.TEMP addr)) =
result (fn (r)=>
emit(A.OPER{
assem="lw `d0, 0(`s0)",
src=[addr],
dst=[r],
jump=NONE
})
)
| munchExp (T.MEM addr_exp) =
result (fn (r)=>
emit(A.OPER{
assem="lw `d0, 0(`s0)",
src=[munchExp addr_exp],
dst=[r],
jump=NONE
})
)
| munchExp (T.TEMP t) = t
| munchExp (T.CONST c) =
result (fn (r) =>
emit(A.OPER{
assem="li `d0, "^ (int2string c),
src=[],
dst=[r],
jump=NONE
})
)
| munchExp (T.CALL(T.NAME func_label, params)) =
result ( fn (r) => (
(* emit(A.OPER{ *)
(* assem="sub $sp, $sp, " ^ *)
(* (int2string (Frame.wordSize * (List.length params))), *)
(* src=[Frame.SP], *)
(* dst=[Frame.SP], *)
(* jump=NONE *)
(* }); *)
emit(A.OPER{
assem="jal "^(Symbol.name func_label),
src= munchArgs (0, params),
dst = calldefs,
jump=NONE
});
(* emit(A.OPER{ *)
(* assem="add $sp, $sp, " ^ *)
(* (int2string (Frame.wordSize * (List.length params))), *)
(* src=[Frame.SP], *)
(* dst=[Frame.SP], *)
(* jump=NONE *)
(* }); *)
emit(A.MOVE{
assem="move `d0, $v0",
src=Frame.RV,
dst=r
})
)
)
| munchExp (T.NAME lab) =
result ( fn(r) => emit(
A.OPER({
assem="la `d0, "^ (Symbol.name lab),
src = [],
dst = [r],
jump=NONE
})
)
)
| munchExp (e) = (
print("uncatched exp:\n");
Printtree.printtree(TextIO.stdOut, T.EXP(e));
raise Unmatched
)
in
munchStm stm;
rev (!assem_list)
end
end