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, size, im) 0
29 #define COND_IS_LOGICAL(cond) 0
31 #define ARCH_PARTIAL_ALU(size) 0
32 #define ARCH_IS_3ADDRESS(alu, f) 1
33 #define ARCH_IS_3ADDRESS_IMM(alu, f) 1
34 #define ARCH_IS_3ADDRESS_ROT(alu, size) 1
35 #define ARCH_IS_3ADDRESS_ROT_IMM(alu) 1
36 #define ARCH_IS_2ADDRESS(alu) 1
37 #define ARCH_IS_3ADDRESS_FP 1
38 #define ARCH_HAS_FLAGS 1
39 #define ARCH_PREFERS_SX(size) 0
40 #define ARCH_HAS_BWX 1
41 #define ARCH_HAS_MUL 1
42 #define ARCH_HAS_DIV 1
43 #define ARCH_HAS_ANDN 1
44 #define ARCH_HAS_SHIFTED_ADD(bits) 1
45 #define ARCH_HAS_BTX(btx, size, cnst) 0
46 #define ARCH_SHIFT_SIZE OP_SIZE_4
47 #define ARCH_NEEDS_BARRIER 0
49 #define i_size(size) maximum(size, OP_SIZE_4)
50 #define i_size_rot(size) maximum(size, OP_SIZE_4)
51 #define i_size_cmp(size) maximum(size, OP_SIZE_4)
119 #define FRAME_SIZE 0x60
122 #define R_UPCALL R_27
123 #define R_TIMESTAMP R_26
124 #define R_SAVED_1 R_25
125 #define R_SAVED_2 R_24
126 #define R_SAVED_3 R_23
127 #define R_SAVED_4 R_22
128 #define R_SAVED_5 R_21
129 #define R_SAVED_6 R_20
130 #define R_SAVED_7 R_19
132 #define R_SCRATCH_1 R_0
133 #define R_SCRATCH_2 R_1
134 #define R_SCRATCH_3 R_2
135 #define R_SCRATCH_4 R_3
136 #define R_SCRATCH_NA_1 R_8
137 #define R_SCRATCH_NA_2 R_9
138 #ifdef HAVE_BITWISE_FRAME
139 #define R_SCRATCH_NA_3 R_10
141 #define R_OFFSET_IMM R_16
142 #define R_CONST_IMM R_17
151 #define FR_SCRATCH_1 FR_0
152 #define FR_SCRATCH_2 FR_1
154 #define SUPPORTED_FP 0x6
155 #define SUPPORTED_FP_HALF_CVT 0x1
157 static bool reg_is_fp(unsigned reg)
159 return reg >= 0x20 && reg < 0x40;
162 static const uint8_t regs_saved[] = { R_SAVED_7, R_SAVED_6, R_SAVED_5, R_SAVED_4, R_SAVED_3 };
163 static const uint8_t regs_volatile[] = { R_4, R_5, R_6, R_7,
164 #ifndef HAVE_BITWISE_FRAME
167 R_11, R_12, R_13, R_14, R_15, R_LR };
168 static const uint8_t fp_saved[] = { 0 };
169 #define n_fp_saved 0U
170 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 };
171 #define reg_is_saved(r) ((r) >= R_19 && (r) <= R_FP)
178 static const struct logical_imm value_to_code_4_table[] = {
179 #include "arm64-w.inc"
182 static const struct logical_imm value_to_code_8_table[] = {
183 #include "arm64-x.inc"
186 static int16_t value_to_code(uint8_t size, uint64_t value)
189 if (size == OP_SIZE_4) {
190 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);
191 return value_to_code_4_table[result].code;
193 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);
194 return value_to_code_8_table[result].code;
198 static bool attr_w gen_load_constant(struct codegen_context *ctx, unsigned reg, uint64_t c)
205 code = value_to_code(OP_SIZE_4, c);
207 gen_insn(INSN_ALU, OP_SIZE_4, ALU_OR, 0);
215 code = value_to_code(OP_SIZE_8, c);
217 gen_insn(INSN_ALU, OP_SIZE_8, ALU_OR, 0);
226 if ((int64_t)c < 0) {
227 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
230 gen_eight((c & 0xffff) | 0xffffffffffff0000ULL);
231 if ((c & 0xffff0000ULL) != 0xffff0000ULL) {
232 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_16_32, 0);
236 gen_eight((c >> 16) & 0xffff);
238 if ((c & 0xffff00000000ULL) != 0xffff00000000ULL) {
239 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_32_48, 0);
243 gen_eight((c >> 32) & 0xffff);
245 if ((c & 0xffff000000000000ULL) != 0xffff000000000000ULL) {
246 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_48_64, 0);
250 gen_eight((c >> 48) & 0xffff);
253 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
256 gen_eight(c & 0xffff);
257 if (c & 0xffff0000ULL) {
258 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_16_32, 0);
262 gen_eight((c >> 16) & 0xffff);
264 if (c & 0xffff00000000ULL) {
265 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_32_48, 0);
269 gen_eight((c >> 32) & 0xffff);
271 if (c & 0xffff000000000000ULL) {
272 gen_insn(INSN_MOV_MASK, OP_SIZE_8, MOV_MASK_48_64, 0);
276 gen_eight((c >> 48) & 0xffff);
282 static bool attr_w gen_address(struct codegen_context *ctx, unsigned base, int64_t imm, unsigned purpose, unsigned size)
284 ctx->base_reg = base;
285 ctx->offset_imm = imm;
286 ctx->offset_reg = false;
288 case IMM_PURPOSE_LDR_OFFSET:
289 case IMM_PURPOSE_LDR_SX_OFFSET:
290 case IMM_PURPOSE_STR_OFFSET:
291 case IMM_PURPOSE_VLDR_VSTR_OFFSET:
292 case IMM_PURPOSE_MVI_CLI_OFFSET:
293 if (likely(imm >= -256) && likely(imm <= 255))
295 if (likely(imm >= 0)) {
296 if (unlikely((imm & ((1 << size) - 1)) != 0))
298 if (likely((imm >> size) <= 4095))
302 case IMM_PURPOSE_LDP_STP_OFFSET:
303 if (unlikely((imm & ((1 << size) - 1)) != 0))
305 if (imm / (1 << size) >= -64 && imm / (1 << size) <= 63)
309 internal(file_line, "gen_address: invalid purpose %d", purpose);
311 g(gen_load_constant(ctx, R_OFFSET_IMM, imm));
312 if (purpose == IMM_PURPOSE_LDP_STP_OFFSET) {
313 gen_insn(INSN_ALU, OP_SIZE_ADDRESS, ALU_ADD, 0);
314 gen_one(R_OFFSET_IMM);
315 gen_one(R_OFFSET_IMM);
317 ctx->base_reg = R_OFFSET_IMM;
321 ctx->offset_reg = true;
326 static bool is_direct_const(int64_t imm, unsigned purpose, unsigned size)
329 case IMM_PURPOSE_STORE_VALUE:
333 case IMM_PURPOSE_ADD:
334 case IMM_PURPOSE_SUB:
335 case IMM_PURPOSE_CMP:
336 case IMM_PURPOSE_CMP_LOGICAL:
337 if (imm >= 0 && imm < 4096)
340 case IMM_PURPOSE_AND:
342 case IMM_PURPOSE_XOR:
343 case IMM_PURPOSE_ANDN:
344 case IMM_PURPOSE_TEST:
345 if (value_to_code(size, imm) >= 0)
348 case IMM_PURPOSE_MUL:
351 internal(file_line, "is_direct_const: invalid purpose %u (imm %"PRIxMAX", size %u)", purpose, (uintmax_t)imm, size);
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;
362 g(gen_load_constant(ctx, R_CONST_IMM, imm));
363 ctx->const_reg = true;
368 static bool attr_w gen_entry(struct codegen_context *ctx)
370 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
371 gen_one(ARG_ADDRESS_1_PRE_I);
373 gen_eight(-FRAME_SIZE);
377 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
381 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
382 gen_one(ARG_ADDRESS_1);
388 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
389 gen_one(ARG_ADDRESS_1);
393 gen_one(R_TIMESTAMP);
395 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
396 gen_one(ARG_ADDRESS_1);
402 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
403 gen_one(ARG_ADDRESS_1);
409 gen_insn(INSN_STP, OP_SIZE_8, 0, 0);
410 gen_one(ARG_ADDRESS_1);
416 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
420 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
424 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
425 gen_one(R_TIMESTAMP);
428 gen_insn(INSN_JMP_INDIRECT, 0, 0, 0);
434 static bool attr_w gen_escape_arg(struct codegen_context *ctx, ip_t ip, uint32_t escape_label)
436 g(gen_load_constant(ctx, R_RET1, ip));
438 gen_insn(INSN_JMP, 0, 0, 0);
439 gen_four(escape_label);
444 static bool attr_w gen_escape(struct codegen_context *ctx)
446 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
450 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
453 gen_one(ARG_ADDRESS_1);
457 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
460 gen_one(ARG_ADDRESS_1);
464 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
467 gen_one(ARG_ADDRESS_1);
471 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
473 gen_one(R_TIMESTAMP);
474 gen_one(ARG_ADDRESS_1);
478 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
481 gen_one(ARG_ADDRESS_1);
485 gen_insn(INSN_LDP, OP_SIZE_8, 0, 0);
488 gen_one(ARG_ADDRESS_1_POST_I);
490 gen_eight(FRAME_SIZE);
492 gen_insn(INSN_RET, 0, 0, 0);
497 static bool attr_w gen_upcall_argument(struct codegen_context attr_unused *ctx, unsigned attr_unused arg)
502 static bool attr_w gen_upcall(struct codegen_context *ctx, unsigned offset, unsigned n_args)
504 g(gen_address(ctx, R_UPCALL, offset, IMM_PURPOSE_LDR_OFFSET, OP_SIZE_8));
505 gen_insn(INSN_MOV, OP_SIZE_8, 0, 0);
506 gen_one(R_SCRATCH_NA_1);
507 gen_address_offset();
509 gen_insn(INSN_CALL_INDIRECT, OP_SIZE_8, 0, 0);
510 gen_one(R_SCRATCH_NA_1);
512 g(gen_upcall_end(ctx, n_args));
517 static bool attr_w gen_timestamp_test(struct codegen_context *ctx, uint32_t escape_label)
519 g(gen_address(ctx, R_UPCALL, offsetof(struct cg_upcall_vector_s, ts), IMM_PURPOSE_LDR_OFFSET, OP_SIZE_4));
520 gen_insn(INSN_MOV, OP_SIZE_4, 0, 0);
521 gen_one(R_SCRATCH_1);
522 gen_address_offset();
524 gen_insn(INSN_CMP, OP_SIZE_4, 0, 1);
525 gen_one(R_SCRATCH_1);
526 gen_one(R_TIMESTAMP);
528 gen_insn(INSN_JMP_COND, OP_SIZE_4, COND_NE, 0);
529 gen_four(escape_label);