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Learning about stacks and locals [skip-ci]

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Johan B.W. de Vries 2022-03-04 13:18:32 +01:00
parent 541b3a3b62
commit 6932741ac5
1 changed files with 39 additions and 3 deletions
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42
tests/integration/test_helper.py
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@ -7,13 +7,13 @@ from pywasm import Runtime
from .helpers import wat2wasm
@pytest.mark.parametrize('size,offset,output', [
@pytest.mark.parametrize('size,offset,exp_out_put', [
('32', 0, 0x3020100),
('32', 1, 0x4030201),
('64', 0, 0x706050403020100),
('64', 2, 0x908070605040302),
])
def test_i32_64_load(size, offset, output):
def test_i32_64_load(size, offset, exp_out_put):
code_wat = f"""
(module
(memory 1)
@ -30,4 +30,40 @@ def test_i32_64_load(size, offset, output):
runtime = Runtime(module, {}, {})
out_put = runtime.exec('testEntry', [])
assert output == out_put
assert exp_out_put == out_put
def test_load_then_store():
code_wat = """
(module
(memory 1)
(data (memory 0) (i32.const 0) "\\04\\00\\00\\00")
(func (export "testEntry") (result i32) (local $my_memory_value i32)
;; Load i32 from address 0
i32.const 0
i32.load
;; Add 8 to the loaded value
i32.const 8
i32.add
local.set $my_memory_value
;; Store back to the memory
i32.const 0
local.get $my_memory_value
i32.store
;; Return something
i32.const 9
return ))
"""
code_wasm = wat2wasm(code_wat)
module = binary.Module.from_reader(io.BytesIO(code_wasm))
runtime = Runtime(module, {}, {})
out_put = runtime.exec('testEntry', [])
assert 9 == out_put
assert (b'\x0c'+ b'\00' * 23) == runtime.store.mems[0].data[:24]