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Implemented vm_* routines for OP_DUP and vm_execute code

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This commit is contained in:
Aryadev Chavali
2023-10-22 20:30:05 +01:00
parent 073a23152e
commit 9da31398ba
2 changed files with 58 additions and 0 deletions
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48
src/runtime.c
View File

@@ -67,6 +67,14 @@ void vm_execute(vm_t *vm)
vm->registers.ret = d.as_word;
prog->ptr++;
}
else if (OPCODE_IS_TYPE(instruction.opcode, OP_DUP))
{
DUP_ROUTINES[instruction.opcode](vm, instruction.operand.as_word);
data_type_t type = OPCODE_DATA_TYPE(instruction.opcode, OP_DUP);
data_t datum = vm_peek(vm, type);
vm->registers.ret = datum.as_word;
prog->ptr++;
}
else if (OPCODE_IS_TYPE(instruction.opcode, OP_NOT))
{
NOT_ROUTINES[instruction.opcode](vm);
@@ -426,6 +434,46 @@ data_t vm_mov_word(vm_t *vm, byte reg)
return ret;
}
void vm_dup_byte(vm_t *vm, word w)
{
if (vm->stack.ptr < w + 1)
// TODO: Error STACK_UNDERFLOW
return;
else if (vm->stack.ptr >= vm->stack.max)
// TODO: Error STACK_OVERFLOW
return;
vm_push_byte(vm, DBYTE(vm->stack.data[vm->stack.ptr - 1 - w]));
}
void vm_dup_hword(vm_t *vm, word w)
{
if (vm->stack.ptr < HWORD_SIZE * (w + 1))
// TODO: Error STACK_UNDERFLOW
return;
else if (vm->stack.ptr + HWORD_SIZE >= vm->stack.max)
// TODO: Error STACK_OVERFLOW
return;
byte bytes[HWORD_SIZE] = {0};
for (size_t i = 0; i < HWORD_SIZE; ++i)
bytes[HWORD_SIZE - i - 1] =
vm->stack.data[vm->stack.ptr - (HWORD_SIZE * (w + 1)) + i];
vm_push_hword(vm, DHWORD(convert_bytes_to_hword(bytes)));
}
void vm_dup_word(vm_t *vm, word w)
{
if (vm->stack.ptr < WORD_SIZE * (w + 1))
// TODO: Error STACK_UNDERFLOW
return;
else if (vm->stack.ptr + WORD_SIZE >= vm->stack.max)
// TODO: Error STACK_OVERFLOW
return;
byte bytes[WORD_SIZE] = {0};
for (size_t i = 0; i < WORD_SIZE; ++i)
bytes[i] = vm->stack.data[vm->stack.ptr - 1 - (WORD_SIZE * (w + 1)) + i];
vm_push_word(vm, DWORD(convert_bytes_to_word(bytes)));
}
data_t vm_pop_byte(vm_t *vm)
{
if (vm->stack.ptr == 0)

10
src/runtime.h
View File

@@ -98,6 +98,16 @@ static const mov_f MOV_ROUTINES[] = {
[OP_MOV_WORD] = vm_mov_word,
};
void vm_dup_byte(vm_t *, word);
void vm_dup_hword(vm_t *, word);
void vm_dup_word(vm_t *, word);
typedef void (*dup_f)(vm_t *, word);
static const dup_f DUP_ROUTINES[] = {
[OP_DUP_BYTE] = vm_dup_byte,
[OP_DUP_HWORD] = vm_dup_hword,
[OP_DUP_WORD] = vm_dup_word,
};
void vm_not_byte(vm_t *);
void vm_not_hword(vm_t *);