Arm/memsize

Consider a memory array of with A address lines and D data lines. What is the capacity of this memory (in bits)?

Write a function that returns the memory capacity (in bits). The capacity will not overflow a 32-bit unsigned integer.

unsigned int memsize(unsigned int A, unsigned int D);

Expected solution length: Around 4 lines.

memsize(12, 8)

r0=32768

.global _start
_start:
	ldr r0, =12	// 12 address lines
	ldr r1, =8	// 8 data lines
	bl memsize
1:	b 1b    // Done

memsize:

arm/memsize