parisc: implement floating point register allocation
[ajla.git] / c1-sparc.inc
blobfa30c41174abb668995ab2885957757b1da042cd
1 /*
2  * Copyright (C) 2024 Mikulas Patocka
3  *
4  * This file is part of Ajla.
5  *
6  * Ajla is free software: you can redistribute it and/or modify it under the
7  * terms of the GNU General Public License as published by the Free Software
8  * Foundation, either version 3 of the License, or (at your option) any later
9  * version.
10  *
11  * Ajla is distributed in the hope that it will be useful, but WITHOUT ANY
12  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
13  * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License along with
16  * Ajla. If not, see <https://www.gnu.org/licenses/>.
17  */
19 #if !defined(ARCH_SPARC64)
20 #define SPARC_9                         cpu_test_feature(CPU_FEATURE_sparc9)
21 #define FRAME_SIZE                      0x60
22 #define OP_SIZE_NATIVE                  (SPARC_9 ? OP_SIZE_8 : OP_SIZE_4)
23 #define OP_SIZE_ADDRESS                 OP_SIZE_4
24 #else
25 #define SPARC_9                         1
26 #define FRAME_SIZE                      0xb0
27 #define OP_SIZE_NATIVE                  OP_SIZE_8
28 #define OP_SIZE_ADDRESS                 OP_SIZE_8
29 #endif
31 #define JMP_LIMIT                       JMP_LONG
33 #define UNALIGNED_TRAP                  1
35 #define ALU_WRITES_FLAGS(alu, im)       0
36 #define ALU1_WRITES_FLAGS(alu)          0
37 #define ROT_WRITES_FLAGS(alu)           0
38 #define COND_IS_LOGICAL(cond)           0
40 #define ARCH_PARTIAL_ALU(size)          0
41 #define ARCH_IS_3ADDRESS                1
42 #define ARCH_HAS_FLAGS                  1
43 #define ARCH_PREFERS_SX(size)           0
44 #define ARCH_HAS_BWX                    1
45 #define ARCH_HAS_MUL                    SPARC_9
46 #define ARCH_HAS_DIV                    SPARC_9
47 #define ARCH_HAS_ANDN                   1
48 #define ARCH_HAS_SHIFTED_ADD(bits)      0
49 #define ARCH_HAS_BTX(btx, size, cnst)   0
50 #define ARCH_SHIFT_SIZE                 OP_SIZE_4
51 #define ARCH_NEEDS_BARRIER              0
53 #define i_size(size)                    OP_SIZE_NATIVE
54 #define i_size_rot(size)                maximum(size, OP_SIZE_4)
56 #define R_G0            0x00
57 #define R_G1            0x01
58 #define R_G2            0x02
59 #define R_G3            0x03
60 #define R_G4            0x04
61 #define R_G5            0x05
62 #define R_G6            0x06
63 #define R_G7            0x07
64 #define R_O0            0x08
65 #define R_O1            0x09
66 #define R_O2            0x0a
67 #define R_O3            0x0b
68 #define R_O4            0x0c
69 #define R_O5            0x0d
70 #define R_O6            0x0e
71 #define R_O7            0x0f
72 #define R_L0            0x10
73 #define R_L1            0x11
74 #define R_L2            0x12
75 #define R_L3            0x13
76 #define R_L4            0x14
77 #define R_L5            0x15
78 #define R_L6            0x16
79 #define R_L7            0x17
80 #define R_I0            0x18
81 #define R_I1            0x19
82 #define R_I2            0x1a
83 #define R_I3            0x1b
84 #define R_I4            0x1c
85 #define R_I5            0x1d
86 #define R_I6            0x1e
87 #define R_I7            0x1f
89 #define FSR_0           0x20
90 #define FSR_1           0x21
91 #define FSR_2           0x22
92 #define FSR_3           0x23
93 #define FSR_4           0x24
94 #define FSR_5           0x25
95 #define FSR_6           0x26
96 #define FSR_7           0x27
97 #define FSR_8           0x28
98 #define FSR_9           0x29
99 #define FSR_10          0x2a
100 #define FSR_11          0x2b
101 #define FSR_12          0x2c
102 #define FSR_13          0x2d
103 #define FSR_14          0x2e
104 #define FSR_15          0x2f
105 #define FSR_16          0x30
106 #define FSR_17          0x31
107 #define FSR_18          0x32
108 #define FSR_19          0x33
109 #define FSR_20          0x34
110 #define FSR_21          0x35
111 #define FSR_22          0x36
112 #define FSR_23          0x37
113 #define FSR_24          0x38
114 #define FSR_25          0x39
115 #define FSR_26          0x3a
116 #define FSR_27          0x3b
117 #define FSR_28          0x3c
118 #define FSR_29          0x3d
119 #define FSR_30          0x3e
120 #define FSR_31          0x3f
122 #define FDR_0           0x20
123 #define FDR_2           0x22
124 #define FDR_4           0x24
125 #define FDR_6           0x26
126 #define FDR_8           0x28
127 #define FDR_10          0x2a
128 #define FDR_12          0x2c
129 #define FDR_14          0x2e
130 #define FDR_16          0x30
131 #define FDR_18          0x32
132 #define FDR_20          0x34
133 #define FDR_22          0x36
134 #define FDR_24          0x38
135 #define FDR_26          0x3a
136 #define FDR_28          0x3c
137 #define FDR_30          0x3e
138 #define FDR_32          0x21
139 #define FDR_34          0x23
140 #define FDR_36          0x25
141 #define FDR_38          0x27
142 #define FDR_40          0x29
143 #define FDR_42          0x2b
144 #define FDR_44          0x2d
145 #define FDR_46          0x2f
146 #define FDR_48          0x31
147 #define FDR_50          0x33
148 #define FDR_52          0x35
149 #define FDR_54          0x37
150 #define FDR_56          0x39
151 #define FDR_58          0x3b
152 #define FDR_60          0x3d
153 #define FDR_62          0x3f
155 #define FQR_0           0x20
156 #define FQR_4           0x24
157 #define FQR_8           0x28
158 #define FQR_12          0x2c
159 #define FQR_16          0x30
160 #define FQR_20          0x34
161 #define FQR_24          0x38
162 #define FQR_28          0x3c
163 #define FQR_32          0x21
164 #define FQR_36          0x25
165 #define FQR_40          0x29
166 #define FQR_44          0x2d
167 #define FQR_48          0x31
168 #define FQR_52          0x35
169 #define FQR_56          0x39
170 #define FQR_60          0x3d
172 #define R_ZERO          0x00
173 #define R_SP            R_O6
175 #define R_FRAME         R_I0
176 #define R_UPCALL        R_I1
177 #define R_TIMESTAMP     R_I2
179 #define R_SCRATCH_1     R_O1
180 #define R_SCRATCH_2     R_O0
181 #define R_SCRATCH_3     R_O3
182 #define R_SCRATCH_4     R_O2
184 #define R_SCRATCH_NA_1  R_O4
185 #define R_SCRATCH_NA_2  R_O5
186 #ifdef HAVE_BITWISE_FRAME
187 #define R_SCRATCH_NA_3  R_O7
188 #endif
190 #define R_SAVED_1       R_L0
191 #define R_SAVED_2       R_L1
193 #define R_ARG0          R_O0
194 #define R_ARG1          R_O1
195 #define R_ARG2          R_O2
196 #define R_ARG3          R_O3
197 #define R_RET0          R_O0
199 #define FR_SCRATCH_1    FDR_0
200 #define FR_SCRATCH_2    FDR_4
202 #define R_OFFSET_IMM    R_G1
203 #define R_CONST_IMM     R_G2
204 #define R_CONST_HELPER  R_G3
206 #define SUPPORTED_FP    0x6
208 static bool reg_is_fp(unsigned reg)
210         return reg >= 0x20 && reg < 0x40;
213 static const uint8_t regs_saved[] = { R_L2, R_L3, R_L4, R_L5, R_L6, R_L7, R_I3, R_I4, R_I5 };
214 static const uint8_t regs_volatile[] = { R_G4, R_G5,
215 #ifndef HAVE_BITWISE_FRAME
216                 R_O7,
217 #endif
218         };
219 static const uint8_t fp_saved[] = { 0 };
220 #define n_fp_saved 0U
221 static const uint8_t fp_volatile[] = { 0 };
222 #define n_fp_volatile 0U
223 #define reg_is_saved(r) ((r) >= R_L0 && (r) <= R_I7)
225 static bool attr_w gen_load_constant(struct codegen_context *ctx, unsigned reg, uint64_t c)
227         int32_t cl;
228         if (SPARC_9) {
229                 if (c >= (uint64_t)-4096) {
230                         gen_insn(INSN_ALU, OP_SIZE_NATIVE, ALU_OR, 0);
231                         gen_one(reg);
232                         gen_one(R_ZERO);
233                         gen_one(ARG_IMM);
234                         gen_eight(c);
235                         return true;
236                 }
237                 if (c >= 0x100000000ULL) {
238                         int32_t cu = c >> 32;
239                         if (cu < -4096 || cu >= 4096) {
240                                 gen_insn(INSN_MOV, OP_SIZE_NATIVE, 0, 0);
241                                 gen_one(R_CONST_HELPER);
242                                 gen_one(ARG_IMM);
243                                 gen_eight(cu & 0xFFFFFC00UL);
244                                 cu &= 0x3FFU;
245                                 if (cu) {
246                                         gen_insn(INSN_ALU, OP_SIZE_NATIVE, ALU_OR, 0);
247                                         gen_one(R_CONST_HELPER);
248                                         gen_one(R_CONST_HELPER);
249                                         gen_one(ARG_IMM);
250                                         gen_eight(cu);
251                                 }
252                         } else {
253                                 gen_insn(INSN_ALU, OP_SIZE_NATIVE, ALU_OR, 0);
254                                 gen_one(R_CONST_HELPER);
255                                 gen_one(R_ZERO);
256                                 gen_one(ARG_IMM);
257                                 gen_eight(cu);
258                         }
259                         gen_insn(INSN_ROT, OP_SIZE_NATIVE, ROT_SHL, 0);
260                         gen_one(R_CONST_HELPER);
261                         gen_one(R_CONST_HELPER);
262                         gen_one(ARG_IMM);
263                         gen_eight(32);
264                 }
265         }
266         cl = c;
267         if (cl < 0 || cl >= 4096) {
268                 gen_insn(INSN_MOV, OP_SIZE_NATIVE, 0, 0);
269                 gen_one(reg);
270                 gen_one(ARG_IMM);
271                 gen_eight(cl & 0xFFFFFC00UL);
272                 cl &= 0x3FFU;
273                 if (cl) {
274                         gen_insn(INSN_ALU, OP_SIZE_NATIVE, ALU_OR, 0);
275                         gen_one(reg);
276                         gen_one(reg);
277                         gen_one(ARG_IMM);
278                         gen_eight(cl);
279                 }
280         } else {
281                 gen_insn(INSN_ALU, OP_SIZE_NATIVE, ALU_OR, 0);
282                 gen_one(reg);
283                 gen_one(R_ZERO);
284                 gen_one(ARG_IMM);
285                 gen_eight(cl);
286         }
287         if (SPARC_9) {
288                 if (c >= 0x100000000ULL) {
289                         gen_insn(INSN_ALU, OP_SIZE_NATIVE, ALU_OR, 0);
290                         gen_one(reg);
291                         gen_one(reg);
292                         gen_one(R_CONST_HELPER);
293                 }
294         }
295         return true;
298 static bool attr_w gen_address(struct codegen_context *ctx, unsigned base, int64_t imm, unsigned purpose, unsigned size)
300         ctx->base_reg = base;
301         ctx->offset_imm = imm;
302         ctx->offset_reg = false;
303         switch (purpose) {
304                 case IMM_PURPOSE_LDR_OFFSET:
305                 case IMM_PURPOSE_LDR_SX_OFFSET:
306                 case IMM_PURPOSE_STR_OFFSET:
307                 case IMM_PURPOSE_LDP_STP_OFFSET:
308                 case IMM_PURPOSE_VLDR_VSTR_OFFSET:
309                 case IMM_PURPOSE_MVI_CLI_OFFSET:
310                         if (likely(imm >= -4096) && likely(imm < 4096))
311                                 return true;
312                         break;
313                 default:
314                         internal(file_line, "gen_address: invalid purpose %u (imm %"PRIxMAX", size %u)", purpose, (uintmax_t)imm, size);
315         }
317         g(gen_load_constant(ctx, R_OFFSET_IMM, imm));
318         ctx->offset_reg = true;
319         return true;
322 static bool is_direct_const(int64_t imm, unsigned purpose, unsigned size)
324         switch (purpose) {
325                 case IMM_PURPOSE_STORE_VALUE:
326                         if (!imm)
327                                 return true;
328                         break;
329                 case IMM_PURPOSE_ADD:
330                 case IMM_PURPOSE_SUB:
331                 case IMM_PURPOSE_CMP:
332                 case IMM_PURPOSE_CMP_LOGICAL:
333                 case IMM_PURPOSE_AND:
334                 case IMM_PURPOSE_OR:
335                 case IMM_PURPOSE_XOR:
336                 case IMM_PURPOSE_ANDN:
337                 case IMM_PURPOSE_TEST:
338                 case IMM_PURPOSE_MUL:
339                         if (likely(imm >= -4096) && likely(imm < 4096))
340                                 return true;
341                         break;
342                 case IMM_PURPOSE_CMOV:
343                         if (likely(imm >= -1024) && likely(imm < 1024))
344                                 return true;
345                         break;
346                 case IMM_PURPOSE_MOVR:
347                         if (likely(imm >= -512) && likely(imm < 512))
348                                 return true;
349                         break;
350                 default:
351                         internal(file_line, "is_direct_const: invalid purpose %u (imm %"PRIxMAX", size %u)", purpose, (uintmax_t)imm, size);
352         }
353         return false;
356 static bool attr_w gen_imm(struct codegen_context *ctx, int64_t imm, unsigned purpose, unsigned size)
358         if (is_direct_const(imm, purpose, size)) {
359                 ctx->const_imm = imm;
360                 ctx->const_reg = false;
361         } else {
362                 g(gen_load_constant(ctx, R_CONST_IMM, imm));
363                 ctx->const_reg = true;
364         }
365         return true;
368 static bool attr_w gen_entry(struct codegen_context *ctx)
370         gen_insn(INSN_ALU, OP_SIZE_NATIVE, ALU_SAVE, 0);
371         gen_one(R_SP);
372         gen_one(R_SP);
373         gen_one(ARG_IMM);
374         gen_eight(-FRAME_SIZE);
376         gen_insn(INSN_JMP_INDIRECT, 0, 0, 0);
377         gen_one(R_I3);
379         return true;
382 static bool attr_w gen_escape_arg(struct codegen_context *ctx, ip_t ip, uint32_t escape_label)
384         g(gen_load_constant(ctx, R_I1, ip));
386         gen_insn(INSN_JMP, 0, 0, 0);
387         gen_four(escape_label);
389         return true;
392 static bool attr_w gen_escape(struct codegen_context *ctx)
394         gen_insn(INSN_RET, 0, 0, 0);
396         return true;
399 static bool attr_w gen_upcall_argument(struct codegen_context attr_unused *ctx, unsigned attr_unused arg)
401         return true;
404 static bool attr_w gen_upcall(struct codegen_context *ctx, unsigned offset, unsigned n_args)
406         g(gen_address(ctx, R_UPCALL, offset, IMM_PURPOSE_LDR_OFFSET, OP_SIZE_ADDRESS));
407         gen_insn(INSN_MOV, OP_SIZE_ADDRESS, 0, 0);
408         gen_one(R_SCRATCH_NA_1);
409         gen_address_offset();
411         gen_insn(INSN_CALL_INDIRECT, OP_SIZE_NATIVE, 0, 0);
412         gen_one(R_SCRATCH_NA_1);
414         g(gen_upcall_end(ctx, n_args));
416         return true;
419 static bool attr_w gen_timestamp_test(struct codegen_context *ctx, uint32_t escape_label)
421         g(gen_address(ctx, R_UPCALL, offsetof(struct cg_upcall_vector_s, ts), IMM_PURPOSE_LDR_OFFSET, OP_SIZE_4));
422         gen_insn(INSN_MOV, OP_SIZE_4, 0, 0);
423         gen_one(R_SCRATCH_1);
424         gen_address_offset();
426         gen_insn(INSN_CMP, OP_SIZE_4, 0, 1);
427         gen_one(R_SCRATCH_1);
428         gen_one(R_TIMESTAMP);
430         gen_insn(INSN_JMP_COND, OP_SIZE_4, COND_NE, 0);
431         gen_four(escape_label);
433         return true;