circuitpython/tests/inlineasm/asmsum.py

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

62 lines
894 B
Python
Raw Normal View History

@micropython.asm_thumb
def asm_sum_words(r0, r1):
# r0 = len
# r1 = ptr
# r2 = sum
# r3 = dummy
mov(r2, 0)
b(loop_entry)
label(loop1)
ldr(r3, [r1, 0])
add(r2, r2, r3)
add(r1, r1, 4)
sub(r0, r0, 1)
label(loop_entry)
cmp(r0, 0)
bgt(loop1)
mov(r0, r2)
2021-03-15 09:57:36 -04:00
@micropython.asm_thumb
def asm_sum_bytes(r0, r1):
# r0 = len
# r1 = ptr
# r2 = sum
# r3 = dummy
mov(r2, 0)
b(loop_entry)
label(loop1)
ldrb(r3, [r1, 0])
add(r2, r2, r3)
add(r1, r1, 1)
sub(r0, r0, 1)
label(loop_entry)
cmp(r0, 0)
bgt(loop1)
mov(r0, r2)
2021-03-15 09:57:36 -04:00
2023-08-22 11:15:46 -04:00
import array
2021-03-15 09:57:36 -04:00
b = array.array("l", (100, 200, 300, 400))
n = asm_sum_words(len(b), b)
print(b, n)
2021-03-15 09:57:36 -04:00
b = array.array("b", (10, 20, 30, 40, 50, 60, 70, 80))
n = asm_sum_bytes(len(b), b)
print(b, n)
b = b"\x01\x02\x03\x04"
n = asm_sum_bytes(len(b), b)
print(b, n)