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# Test boundary conditions for various architectures
SET_TEMPLATE = """
@micropython.viper
def set{off}(dest: ptr8):
saved = dest
dest[{off}] = {val}
assert int(saved) == int(dest)
set{off}(buffer)
print(hex(get_index(buffer, {off})))
"""
BIT_THRESHOLDS = (5, 8, 11, 12)
SIZE = 1
MASK = (1 << (8 * SIZE)) - 1
@micropython.viper
def set_index(dest: ptr8, i: int, val: uint):
saved = dest
dest[i] = val
assert int(dest) == int(saved)
def get_index(src: ptr8, i: int):
return src[i]
buffer = bytearray(((1 << max(BIT_THRESHOLDS) + 1) // 1024) * 1024)
next = 1
val = 0
for bit in BIT_THRESHOLDS:
print("---", bit)
pre, idx, post = (((1 << bit) - (2 * SIZE)), ((1 << bit) - (1 * SIZE)), (1 << bit))
val = (val << 8) + next
next += 1
set_index(buffer, pre, val & MASK)
val = (val << 8) + next
next += 1
set_index(buffer, idx, val & MASK)
val = (val << 8) + next
next += 1
set_index(buffer, post, val & MASK)
val = (val << 8) + next
next += 1
print(hex(get_index(buffer, pre)), hex(get_index(buffer, idx)), hex(get_index(buffer, post)))
exec(SET_TEMPLATE.format(off=pre, val=val & MASK))
val = (val << 8) + next
next += 1
exec(SET_TEMPLATE.format(off=idx, val=val & MASK))
val = (val << 8) + next
next += 1
exec(SET_TEMPLATE.format(off=post, val=val & MASK))
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