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Diffstat (limited to 'src/inst.c')
| -rw-r--r-- | src/inst.c | 399 |
1 files changed, 0 insertions, 399 deletions
diff --git a/src/inst.c b/src/inst.c deleted file mode 100644 index 3980173..0000000 --- a/src/inst.c +++ /dev/null @@ -1,399 +0,0 @@ -/* Copyright (C) 2023 Aryadev Chavali - - * You may distribute and modify this code under the terms of the - * GPLv2 license. You should have received a copy of the GPLv2 - * license with this file. If not, please write to: - * aryadev@aryadevchavali.com. - - * Created: 2023-10-15 - * Author: Aryadev Chavali - * Description: Implementation of bytecode for instructions - */ - -#include <assert.h> -#include <stdbool.h> -#include <stdio.h> -#include <string.h> - -#include "./inst.h" - -const char *opcode_as_cstr(opcode_t code) -{ - switch (code) - { - case OP_NOOP: - return "NOOP"; - break; - case OP_PUSH_BYTE: - return "PUSH_BYTE"; - break; - case OP_PUSH_WORD: - return "PUSH_WORD"; - break; - case OP_PUSH_HWORD: - return "PUSH_HWORD"; - break; - case OP_PUSH_REGISTER_BYTE: - return "PUSH_REGISTER_BYTE"; - break; - case OP_PUSH_REGISTER_WORD: - return "PUSH_REGISTER_WORD"; - break; - case OP_PUSH_REGISTER_HWORD: - return "PUSH_REGISTER_HWORD"; - break; - case OP_POP_BYTE: - return "POP_BYTE"; - break; - case OP_POP_WORD: - return "POP_WORD"; - break; - case OP_POP_HWORD: - return "POP_HWORD"; - break; - case OP_MOV_BYTE: - return "MOV_BYTE"; - break; - case OP_MOV_WORD: - return "MOV_WORD"; - break; - case OP_MOV_HWORD: - return "MOV_HWORD"; - break; - case OP_DUP_BYTE: - return "DUP_BYTE"; - break; - case OP_DUP_HWORD: - return "DUP_HWORD"; - break; - case OP_DUP_WORD: - return "DUP_WORD"; - break; - case OP_NOT_BYTE: - return "NOT_BYTE"; - break; - case OP_NOT_HWORD: - return "NOT_HWORD"; - break; - case OP_NOT_WORD: - return "NOT_WORD"; - break; - case OP_OR_BYTE: - return "OR_BYTE"; - break; - case OP_OR_HWORD: - return "OR_HWORD"; - break; - case OP_OR_WORD: - return "OR_WORD"; - break; - case OP_AND_BYTE: - return "AND_BYTE"; - break; - case OP_AND_HWORD: - return "AND_HWORD"; - break; - case OP_AND_WORD: - return "AND_WORD"; - break; - case OP_XOR_BYTE: - return "XOR_BYTE"; - break; - case OP_XOR_HWORD: - return "XOR_HWORD"; - break; - case OP_XOR_WORD: - return "XOR_WORD"; - break; - case OP_EQ_BYTE: - return "EQ_BYTE"; - break; - case OP_EQ_HWORD: - return "EQ_HWORD"; - break; - case OP_EQ_WORD: - return "EQ_WORD"; - break; - case OP_PLUS_BYTE: - return "PLUS_BYTE"; - break; - case OP_PLUS_HWORD: - return "PLUS_HWORD"; - break; - case OP_PLUS_WORD: - return "PLUS_WORD"; - break; - case OP_JUMP_ABS: - return "JUMP_ABS"; - break; - case OP_JUMP_STACK: - return "JUMP_STACK"; - break; - case OP_JUMP_REGISTER: - return "JUMP_REGISTER"; - break; - case OP_JUMP_IF_BYTE: - return "JUMP_IF_BYTE"; - break; - case OP_JUMP_IF_HWORD: - return "JUMP_IF_HWORD"; - break; - case OP_JUMP_IF_WORD: - return "JUMP_IF_WORD"; - break; - case OP_PRINT_CHAR: - return "PRINT_CHAR"; - break; - case OP_PRINT_BYTE: - return "PRINT_BYTE"; - break; - case OP_PRINT_INT: - return "PRINT_INT"; - break; - case OP_PRINT_HWORD: - return "PRINT_HWORD"; - break; - case OP_PRINT_LONG: - return "PRINT_LONG"; - break; - case OP_PRINT_WORD: - return "PRINT_WORD"; - break; - case OP_HALT: - return "HALT"; - break; - case NUMBER_OF_OPCODES: - return ""; - break; - } - return ""; -} - -void data_print(data_t datum, data_type_t type, FILE *fp) -{ - switch (type) - { - case DATA_TYPE_NIL: - break; - case DATA_TYPE_BYTE: - fprintf(fp, "%X", datum.as_byte); - break; - case DATA_TYPE_HWORD: - fprintf(fp, "%d", datum.as_hword); - break; - case DATA_TYPE_WORD: - fprintf(fp, "%lX", datum.as_word); - break; - } -} - -hword convert_bytes_to_hword(byte *bytes) -{ - hword h = 0; - memcpy(&h, bytes, HWORD_SIZE); - return h; -} - -void convert_hword_to_bytes(hword w, byte *bytes) -{ - memcpy(bytes, &w, HWORD_SIZE); -} - -void convert_word_to_bytes(word w, byte *bytes) -{ - memcpy(bytes, &w, WORD_SIZE); -} - -word convert_bytes_to_word(byte *bytes) -{ - word w = 0; - memcpy(&w, bytes, WORD_SIZE); - return w; -} - -void inst_print(inst_t instruction, FILE *fp) -{ - static_assert(NUMBER_OF_OPCODES == 46, "inst_bytecode_size: Out of date"); - fprintf(fp, "%s(", opcode_as_cstr(instruction.opcode)); - if (OPCODE_IS_TYPE(instruction.opcode, OP_PUSH)) - { - data_type_t type = (data_type_t)instruction.opcode; - fprintf(fp, "datum=0x"); - data_print(instruction.operand, type, fp); - } - else if (OPCODE_IS_TYPE(instruction.opcode, OP_PUSH_REGISTER) || - OPCODE_IS_TYPE(instruction.opcode, OP_MOV) || - instruction.opcode == OP_JUMP_REGISTER) - { - fprintf(fp, "reg=0x"); - data_print(instruction.operand, DATA_TYPE_BYTE, fp); - } - else if (OPCODE_IS_TYPE(instruction.opcode, OP_DUP)) - { - fprintf(fp, "n=%lu", instruction.operand.as_word); - } - else if (instruction.opcode == OP_JUMP_ABS || - OPCODE_IS_TYPE(instruction.opcode, OP_JUMP_IF)) - { - fprintf(fp, "address=0x"); - data_print(instruction.operand, DATA_TYPE_WORD, fp); - } - fprintf(fp, ")"); -} - -size_t inst_bytecode_size(inst_t inst) -{ - static_assert(NUMBER_OF_OPCODES == 46, "inst_bytecode_size: Out of date"); - size_t size = 1; // for opcode - if (OPCODE_IS_TYPE(inst.opcode, OP_PUSH)) - { - if (inst.opcode == OP_PUSH_BYTE) - ++size; - else if (inst.opcode == OP_PUSH_HWORD) - size += HWORD_SIZE; - else if (inst.opcode == OP_PUSH_WORD) - size += WORD_SIZE; - } - else if (OPCODE_IS_TYPE(inst.opcode, OP_PUSH_REGISTER) || - OPCODE_IS_TYPE(inst.opcode, OP_MOV) || - inst.opcode == OP_JUMP_REGISTER) - // Only need a byte for the register - ++size; - else if (OPCODE_IS_TYPE(inst.opcode, OP_DUP) || inst.opcode == OP_JUMP_ABS || - OPCODE_IS_TYPE(inst.opcode, OP_JUMP_IF)) - size += WORD_SIZE; - return size; -} - -void inst_write_bytecode(inst_t inst, darr_t *darr) -{ - static_assert(NUMBER_OF_OPCODES == 46, "inst_write_bytecode: Out of date"); - // Append opcode - darr_append_byte(darr, inst.opcode); - // Then append 0 or more operands - data_type_t to_append = DATA_TYPE_NIL; - if (OPCODE_IS_TYPE(inst.opcode, OP_PUSH)) - to_append = (data_type_t)inst.opcode; - else if (OPCODE_IS_TYPE(inst.opcode, OP_PUSH_REGISTER) || - OPCODE_IS_TYPE(inst.opcode, OP_MOV) || - inst.opcode == OP_JUMP_REGISTER) - to_append = DATA_TYPE_BYTE; - else if (OPCODE_IS_TYPE(inst.opcode, OP_DUP) || inst.opcode == OP_JUMP_ABS || - OPCODE_IS_TYPE(inst.opcode, OP_JUMP_IF)) - to_append = DATA_TYPE_WORD; - - switch (to_append) - { - case DATA_TYPE_NIL: - break; - case DATA_TYPE_BYTE: - darr_append_byte(darr, inst.operand.as_byte); - break; - case DATA_TYPE_HWORD: - darr_append_bytes(darr, (byte *)&inst.operand.as_hword, HWORD_SIZE); - break; - case DATA_TYPE_WORD: - darr_append_bytes(darr, (byte *)&inst.operand.as_word, WORD_SIZE); - break; - } -} - -void insts_write_bytecode(inst_t *insts, size_t size, darr_t *darr) -{ - for (size_t i = 0; i < size; ++i) - inst_write_bytecode(insts[i], darr); -} - -data_t read_type_from_darr(darr_t *darr, data_type_t type) -{ - switch (type) - { - case DATA_TYPE_NIL: - break; - case DATA_TYPE_BYTE: - if (darr->used >= darr->available) - // TODO: Error (darr has no space left) - return DBYTE(0); - return DBYTE(darr->data[darr->used++]); - break; - case DATA_TYPE_HWORD: - if (darr->used + HWORD_SIZE >= darr->available) - // TODO: Error (darr has no space left) - return DWORD(0); - hword u = 0; - memcpy(&u, darr->data + darr->used, HWORD_SIZE); - darr->used += HWORD_SIZE; - return DHWORD(u); - break; - case DATA_TYPE_WORD: - if (darr->used + WORD_SIZE >= darr->available) - // TODO: Error (darr has no space left) - return DWORD(0); - word w = 0; - memcpy(&w, darr->data + darr->used, WORD_SIZE); - darr->used += WORD_SIZE; - return DWORD(w); - break; - } - // TODO: Error (unrecognised type) - return DBYTE(0); -} - -inst_t inst_read_bytecode(darr_t *darr) -{ - static_assert(NUMBER_OF_OPCODES == 46, "inst_read_bytecode: Out of date"); - if (darr->used >= darr->available) - return (inst_t){0}; - inst_t inst = {0}; - opcode_t opcode = darr->data[darr->used++]; - if (opcode > OP_HALT || opcode == NUMBER_OF_OPCODES || opcode < OP_NOOP) - // Translate to NOOP - return inst; - // Read operands - if (OPCODE_IS_TYPE(opcode, OP_PUSH)) - inst.operand = read_type_from_darr(darr, (data_type_t)opcode); - // Read register (as a byte) - else if (OPCODE_IS_TYPE(opcode, OP_PUSH_REGISTER) || - OPCODE_IS_TYPE(opcode, OP_MOV) || inst.opcode == OP_JUMP_STACK) - inst.operand = read_type_from_darr(darr, DATA_TYPE_BYTE); - else if (OPCODE_IS_TYPE(opcode, OP_DUP) || opcode == OP_JUMP_ABS || - OPCODE_IS_TYPE(opcode, OP_JUMP_IF)) - inst.operand = read_type_from_darr(darr, DATA_TYPE_WORD); - // Otherwise opcode doesn't take operands - - inst.opcode = opcode; - - return inst; -} - -inst_t *insts_read_bytecode(darr_t *bytes, size_t *ret_size) -{ - *ret_size = 0; - // NOTE: Here we use the darr as a dynamic array of inst_t. - darr_t instructions = {0}; - darr_init(&instructions, sizeof(inst_t)); - while (bytes->used < bytes->available) - { - inst_t instruction = inst_read_bytecode(bytes); - darr_append_bytes(&instructions, (byte *)&instruction, sizeof(instruction)); - } - *ret_size = instructions.used / sizeof(inst_t); - return (inst_t *)instructions.data; -} - -void insts_write_bytecode_file(inst_t *instructions, size_t size, FILE *fp) -{ - darr_t darr = {0}; - darr_init(&darr, 0); - insts_write_bytecode(instructions, size, &darr); - darr_write_file(&darr, fp); - free(darr.data); -} - -inst_t *insts_read_bytecode_file(FILE *fp, size_t *ret) -{ - darr_t darr = darr_read_file(fp); - inst_t *instructions = insts_read_bytecode(&darr, ret); - free(darr.data); - return instructions; -} |