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 parse-bytecode

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asmsum.py

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@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)

@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)

import array

b = array.array('l', (100, 200, 300, 400))

n = asm_sum_words(len(b), b)

print(b, n)

b = array.array('b', (10, 20, 30, 40, 50, 60, 70, 80))

n = asm_sum_bytes(len(b), b)

print(b, n)