micropython/tests/basics/int-small.py

# This tests small int range for 32-bit machine

a = 0x3fffff
print(a)
a *= 0x10
print(a)
a *= 0x10
print(a)
a += 0xff
print(a)
# This would overflow
#a += 1

a = -0x3fffff
print(a)
a *= 0x10
print(a)
a *= 0x10
print(a)
a -= 0xff
print(a)
# This still doesn't overflow
a -= 1
print(a)
# This would overflow
#a -= 1
Typo fixes in comments. 2014-01-31 15:13:51 +00:00			`# This tests small int range for 32-bit machine`
Add proper checks for fits-in-small-int. Make it reusable. We likely should make mp_obj_new_int() inline, and rely on its encapsulated check rather than inline checks everywhere explicitly. Also, parser for big small int values is still broken. 2014-01-12 15:06:25 +00:00
			`a = 0x3fffff`
			`print(a)`
			`a *= 0x10`
			`print(a)`
			`a *= 0x10`
			`print(a)`
			`a += 0xff`
			`print(a)`
			`# This would overflow`
			`#a += 1`

			`a = -0x3fffff`
			`print(a)`
			`a *= 0x10`
			`print(a)`
			`a *= 0x10`
			`print(a)`
			`a -= 0xff`
			`print(a)`
			`# This still doesn't overflow`
			`a -= 1`
			`print(a)`
			`# This would overflow`
			`#a -= 1`