2 * Copyright (C) 2024 Mikulas Patocka
4 * This file is part of Ajla.
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
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.
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/>.
19 #define OP_SIZE_NATIVE OP_SIZE_8
20 #define OP_SIZE_ADDRESS OP_SIZE_8
22 #define JMP_LIMIT JMP_LONG
24 #define UNALIGNED_TRAP 0
26 #define ALU_WRITES_FLAGS(alu, im) 0
27 #define ALU1_WRITES_FLAGS(alu) 0
28 #define ROT_WRITES_FLAGS(alu) 0
29 #define COND_IS_LOGICAL(cond) 0
31 #define ARCH_PARTIAL_ALU(size) 0
32 #define ARCH_IS_3ADDRESS 1
33 #define ARCH_HAS_FLAGS 1
34 #define ARCH_PREFERS_SX(size) 0
35 #define ARCH_HAS_BWX 1
36 #define ARCH_HAS_MUL 1
37 #define ARCH_HAS_DIV 1
38 #define ARCH_HAS_ANDN 1
39 #define ARCH_HAS_SHIFTED_ADD(bits) 1
40 #define ARCH_HAS_BTX(btx, size, cnst) 0
41 #define ARCH_SHIFT_SIZE OP_SIZE_4
42 #define ARCH_NEEDS_BARRIER 0
44 #define i_size(size) maximum(size, OP_SIZE_4)
45 #define i_size_rot(size) maximum(size, OP_SIZE_4)
113 #define FRAME_SIZE 0x60
116 #define R_UPCALL R_27
117 #define R_TIMESTAMP R_26
118 #define R_SAVED_1 R_25
119 #define R_SAVED_2 R_24
120 #define R_SAVED_3 R_23
121 #define R_SAVED_4 R_22
122 #define R_SAVED_5 R_21
123 #define R_SAVED_6 R_20
124 #define R_SAVED_7 R_19
126 #define R_SCRATCH_1 R_0
127 #define R_SCRATCH_2 R_1
128 #define R_SCRATCH_3 R_2
129 #define R_SCRATCH_4 R_3
130 #define R_SCRATCH_NA_1 R_8
131 #define R_SCRATCH_NA_2 R_9
132 #ifdef HAVE_BITWISE_FRAME
133 #define R_SCRATCH_NA_3 R_10
135 #define R_OFFSET_IMM R_16
136 #define R_CONST_IMM R_17
145 #define FR_SCRATCH_1 FR_0
146 #define FR_SCRATCH_2 FR_1
148 #define SUPPORTED_FP 0x6
149 #define SUPPORTED_FP_HALF_CVT 0x1
151 static bool reg_is_fp(unsigned reg)
153 return reg >= 0x20 && reg < 0x40;
156 static const uint8_t regs_saved[] = { R_SAVED_7, R_SAVED_6, R_SAVED_5, R_SAVED_4, R_SAVED_3 };
157 static const uint8_t regs_volatile[] = { R_4, R_5, R_6, R_7,
158 #ifndef HAVE_BITWISE_FRAME
161 R_11, R_12, R_13, R_14, R_15, R_LR };
162 static const uint8_t fp_saved[] = { 0 };
163 #define n_fp_saved 0U
164 static const uint8_t fp_volatile[] = { FR_2, FR_3, FR_4, FR_5, FR_6, FR_7, FR_16, FR_17, FR_18, FR_19, FR_20, FR_21, FR_22, FR_23, FR_24, FR_25, FR_26, FR_27, FR_28, FR_29, FR_30, FR_31 };
165 #define reg_is_saved(r) ((r) >= R_19 && (r) <= R_FP)
172 static const struct logical_imm value_to_code_4_table[] = {
173 #include "arm64-w.inc"
176 static const struct logical_imm value_to_code_8_table[] = {
177 #include "arm64-x.inc"
180 static int16_t value_to_code(uint8_t size, uint64_t value)
183 if (size == OP_SIZE_4) {
184 binary_search(size_t, n_array_elements(value_to_code_4_table), result, value_to_code_4_table[result].value == value, value_to_code_4_table[result].value < value, return -1);
185 return value_to_code_4_table[result].code;
187 binary_search(size_t, n_array_elements(value_to_code_8_table), result, value_to_code_8_table[result].value == value, value_to_code_8_table[result].value < value, return -1);
188 return value_to_code_8_table[result].code;
192 static bool attr_w gen_load_constant(struct codegen_context *ctx, unsigned reg, uint64_t c)
199 code = value_to_code(OP_SIZE_4, c);
201 gen_insn(INSN_ALU, OP_SIZE_4, ALU_OR, 0);
209 code = value_to_code(OP_SIZE_8, c);
211 gen_insn(INSN_ALU, OP_SIZE_8, ALU_OR, 0);
220 if ((int64_t)c < 0) {
221 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
224 gen_eight((c & 0xffff) | 0xffffffffffff0000ULL);
225 if ((c & 0xffff0000ULL) != 0xffff0000ULL) {
226 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_16_32, 0);
230 gen_eight((c >> 16) & 0xffff);
232 if ((c & 0xffff00000000ULL) != 0xffff00000000ULL) {
233 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_32_48, 0);
237 gen_eight((c >> 32) & 0xffff);
239 if ((c & 0xffff000000000000ULL) != 0xffff000000000000ULL) {
240 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_48_64, 0);
244 gen_eight((c >> 48) & 0xffff);
247 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
250 gen_eight(c & 0xffff);
251 if (c & 0xffff0000ULL) {
252 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_16_32, 0);
256 gen_eight((c >> 16) & 0xffff);
258 if (c & 0xffff00000000ULL) {
259 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_32_48, 0);
263 gen_eight((c >> 32) & 0xffff);
265 if (c & 0xffff000000000000ULL) {
266 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_48_64, 0);
270 gen_eight((c >> 48) & 0xffff);
276 static bool attr_w gen_address(struct codegen_context *ctx, unsigned base, int64_t imm, unsigned purpose, unsigned size)
278 ctx->base_reg = base;
279 ctx->offset_imm = imm;
280 ctx->offset_reg = false;
282 case IMM_PURPOSE_LDR_OFFSET:
283 case IMM_PURPOSE_LDR_SX_OFFSET:
284 case IMM_PURPOSE_STR_OFFSET:
285 case IMM_PURPOSE_VLDR_VSTR_OFFSET:
286 case IMM_PURPOSE_MVI_CLI_OFFSET:
287 if (likely(imm >= -256) && likely(imm <= 255))
289 if (likely(imm >= 0)) {
290 if (unlikely((imm & ((1 << size) - 1)) != 0))
292 if (likely((imm >> size) <= 4095))
296 case IMM_PURPOSE_LDP_STP_OFFSET:
297 if (unlikely((imm & ((1 << size) - 1)) != 0))
299 if (imm / (1 << size) >= -64 && imm / (1 << size) <= 63)
303 internal(file_line, "gen_address: invalid purpose %d", purpose);
305 g(gen_load_constant(ctx, R_OFFSET_IMM, imm));
306 if (purpose == IMM_PURPOSE_LDP_STP_OFFSET) {
307 gen_insn(INSN_ALU, OP_SIZE_ADDRESS, ALU_ADD, 0);
308 gen_one(R_OFFSET_IMM);
309 gen_one(R_OFFSET_IMM);
311 ctx->base_reg = R_OFFSET_IMM;
315 ctx->offset_reg = true;
320 static bool is_direct_const(int64_t imm, unsigned purpose, unsigned size)
323 case IMM_PURPOSE_STORE_VALUE:
327 case IMM_PURPOSE_ADD:
328 case IMM_PURPOSE_SUB:
329 case IMM_PURPOSE_CMP:
330 case IMM_PURPOSE_CMP_LOGICAL:
331 if (imm >= 0 && imm < 4096)
334 case IMM_PURPOSE_AND:
336 case IMM_PURPOSE_XOR:
337 case IMM_PURPOSE_ANDN:
338 case IMM_PURPOSE_TEST:
339 if (value_to_code(size, imm) >= 0)
342 case IMM_PURPOSE_MUL:
345 internal(file_line, "is_direct_const: invalid purpose %u (imm %"PRIxMAX", size %u)", purpose, (uintmax_t)imm, size);
350 static bool attr_w gen_imm(struct codegen_context *ctx, int64_t imm, unsigned purpose, unsigned size)
352 if (is_direct_const(imm, purpose, size)) {
353 ctx->const_imm = imm;
354 ctx->const_reg = false;
356 g(gen_load_constant(ctx, R_CONST_IMM, imm));
357 ctx->const_reg = true;
362 static bool attr_w gen_entry(struct codegen_context *ctx)
364 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
365 gen_one(ARG_ADDRESS_1_PRE_I);
367 gen_eight(-FRAME_SIZE);
371 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
375 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
376 gen_one(ARG_ADDRESS_1);
382 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
383 gen_one(ARG_ADDRESS_1);
387 gen_one(R_TIMESTAMP);
389 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
390 gen_one(ARG_ADDRESS_1);
396 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
397 gen_one(ARG_ADDRESS_1);
403 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
404 gen_one(ARG_ADDRESS_1);
410 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
414 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
418 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
419 gen_one(R_TIMESTAMP);
422 gen_insn(INSN_JMP_INDIRECT, 0, 0, 0);
428 static bool attr_w gen_escape_arg(struct codegen_context *ctx, ip_t ip, uint32_t escape_label)
430 g(gen_load_constant(ctx, R_RET1, ip));
432 gen_insn(INSN_JMP, 0, 0, 0);
433 gen_four(escape_label);
438 static bool attr_w gen_escape(struct codegen_context *ctx)
440 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
444 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
447 gen_one(ARG_ADDRESS_1);
451 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
454 gen_one(ARG_ADDRESS_1);
458 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
461 gen_one(ARG_ADDRESS_1);
465 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
467 gen_one(R_TIMESTAMP);
468 gen_one(ARG_ADDRESS_1);
472 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
475 gen_one(ARG_ADDRESS_1);
479 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
482 gen_one(ARG_ADDRESS_1_POST_I);
484 gen_eight(FRAME_SIZE);
486 gen_insn(INSN_RET, 0, 0, 0);
491 static bool attr_w gen_upcall_argument(struct codegen_context attr_unused *ctx, unsigned attr_unused arg)
496 static bool attr_w gen_upcall(struct codegen_context *ctx, unsigned offset, unsigned n_args)
498 g(gen_address(ctx, R_UPCALL, offset, IMM_PURPOSE_LDR_OFFSET, OP_SIZE_8));
499 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
500 gen_one(R_SCRATCH_NA_1);
501 gen_address_offset();
503 gen_insn(INSN_CALL_INDIRECT, OP_SIZE_8, 0, 0);
504 gen_one(R_SCRATCH_NA_1);
506 g(gen_upcall_end(ctx, n_args));
511 static bool attr_w gen_timestamp_test(struct codegen_context *ctx, uint32_t escape_label)
513 g(gen_address(ctx, R_UPCALL, offsetof(struct cg_upcall_vector_s, ts), IMM_PURPOSE_LDR_OFFSET, OP_SIZE_4));
514 gen_insn(INSN_MOV, OP_SIZE_4, 0, 0);
515 gen_one(R_SCRATCH_1);
516 gen_address_offset();
518 gen_insn(INSN_CMP, OP_SIZE_4, 0, 1);
519 gen_one(R_SCRATCH_1);
520 gen_one(R_TIMESTAMP);
522 gen_insn(INSN_JMP_COND, OP_SIZE_4, COND_NE, 0);
523 gen_four(escape_label);