Arm/memaddr

Consider a memory array of depth D and width of B bits. How many address lines are needed for this memory array?

Write a function that returns the number of address bits for a memory of depth D and width B bits. D and B will be at least 1.

unsigned int addrlines(unsigned int D, unsigned int B);

Expected solution length: Around 4 lines.

addrlines(16, 8)

r0=4

.global _start
_start:
	ldr r0, =16	// Depth 16
	ldr r1, =8	// 8 bit wide (128 bits of capacity)
	bl addrlines
1:	b 1b    // Done

addrlines:

arm/memaddr

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