def unwrap_u64(vt, val):
if vt == ValTypeI32:
return uint64(val)
elif vt == ValTypeI64:
return uint64(val)
elif vt == ValTypeF32:
return uint64(val)
elif vt == ValTypeF64:
return uint64(val)
else:
raise Exception("unreachable")
def __trunc_sat_u(z, n):
if math.isnan(z):
return 0
if z == -math.inf:
return 0
max_value = (uint64(1) << n) - 1
if math.isinf(z):
return max_value
x = math.trunc(z)
if x < 0:
return 0
elif x >= float64(max_value):
return max_value
else:
return uint64(x)
def i64_trunc_f64u(vm, _):
f = math.trunc(vm.pop_f64())
if f >= __MaxUint64 or f < 0:
raise ErrIntOverflow
if math.isnan(f):
raise ErrConvertToInt
vm.push_u64(uint64(f))
def i64_clz(vm, _):
vm.push_u64(uint64(__leading_zeros64(vm.pop_u64())))
def i64_pop_cnt(vm, _):
vm.push_u64(uint64(__ones_count64(vm.pop_u64())))
def i64_extend_i32u(vm, _):
vm.push_u64(uint64(vm.pop_u32()))
def push_u32(self, val):
self.push_numeric(uint64(val))
def i64_ctz(vm, _):
vm.push_u64(uint64(__trailing_zeros64(vm.pop_u64())))
def push_u64(self, val):
self.slots.append(uint64(val))
def pop_u64(self) -> uint64:
return uint64(self.slots.pop())
def i64_load_32u(vm, mem_arg):
val = read_u32(vm, mem_arg)
vm.push_u64(uint64(val))
def i64_load_16u(vm, mem_arg):
val = read_u16(vm, mem_arg)
vm.push_u64(uint64(val))
def i64_load_8u(vm, mem_arg):
val = read_u8(vm, mem_arg)
vm.push_u64(uint64(val))
def get_offset(vm, mem_arg):
offset = mem_arg.offset
return uint64(vm.pop_u32()) + uint64(offset)
def read_u64(vm, mem_arg):
buf = [0x00] * 8
offset = get_offset(vm, mem_arg)
buf = vm.memory.read(offset, buf)
return uint64(int.from_bytes(bytearray(buf), byteorder='little'))