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wasm_interp: implement memory size instructions

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Brian Carroll 2022-11-25 15:39:26 +00:00
parent 598e62275d
commit e08b09538e
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1 changed files with 9 additions and 2 deletions
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11
crates/wasm_interp/src/execute.rs
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@ -429,8 +429,15 @@ impl<'a> ExecutionState<'a> {
let mut target = &mut self.memory[addr..][..4];
target.write(&unwrapped.to_le_bytes()[..4]).unwrap();
}
CURRENTMEMORY => todo!("{:?} @ {:#x}", op_code, file_offset),
GROWMEMORY => todo!("{:?} @ {:#x}", op_code, file_offset),
CURRENTMEMORY => {
let size = self.memory.len() as i32 / MemorySection::PAGE_SIZE as i32;
self.value_stack.push(Value::I32(size));
}
GROWMEMORY => {
let grow_pages = self.value_stack.pop_u32();
let grow_bytes = grow_pages as usize * MemorySection::PAGE_SIZE as usize;
self.memory.extend(iter::repeat(0).take(grow_bytes));
}
I32CONST => {
let value = i32::parse((), &module.code.bytes, &mut self.program_counter).unwrap();
self.write_debug(value);