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This commit is contained in:
Andre Wagner
2026-05-15 07:22:58 -05:00
parent 89caa700cf
commit c8a6db0e4e
4 changed files with 241 additions and 3 deletions
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35
lib/code.c
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@@ -15,6 +15,10 @@
#define N_CONST_ADDR 0x0c
#define CONST_START 0x10
#define OP_8BIT_OPERAND 0xa0
#define OP_16BIT_OPERAND 0xc0
#define OP_32BIT_OPERAND 0xe0
struct Code {
uint8_t const* bytecode;
size_t bytecode_sz;
@@ -126,3 +130,34 @@ uint32_t code_n_functions(Code const* code)
{
return code->fn_count;
}
Instruction code_next_instruction(Code const* code, uint32_t function_id, uint32_t pc)
{
uint32_t addr = code->fn_addr[function_id] + 4 + pc;
uint8_t opcode = code->bytecode[addr];
int32_t operand = 0;
uint8_t sz = 1;
if (opcode >= OP_8BIT_OPERAND && opcode < OP_16BIT_OPERAND) {
operand = code->bytecode[addr + 1];
sz = 2;
} else if (opcode >= OP_16BIT_OPERAND && opcode < OP_32BIT_OPERAND) {
opcode -= 0x20;
operand = (uint16_t) code->bytecode[addr + 1] |
(uint16_t) (code->bytecode[addr + 2] << 8);
sz = 3;
} else if (opcode >= OP_32BIT_OPERAND) {
opcode -= 0x40;
operand = (uint32_t) code->bytecode[addr + 1] |
(uint32_t) (code->bytecode[addr + 2] << 8) |
(uint32_t) (code->bytecode[addr + 3] << 16) |
(uint32_t) (code->bytecode[addr + 4] << 24);
sz = 5;
}
return (Instruction) {
.operator = (TYC_INST) opcode,
.operand = operand,
.sz = sz,
};
}