# Calculate a^b. Where: a0=a, a1=b
#
# Also, this is a good example of how numeric labels can be used
#
# Label 1: can be defined and redefined everywhere, and we can use
# a suffix when referencing it, to specify if we want to reference
# the previous or the next definition of the label, according to the
# current position. 'b' for before 'f' for after.
#
# Ex:
#
# beqz	a1, 1f  # refers to the symbol 1 defined after this instruction
#

.globl _start
.section .text
pow:
	mv	a2, a0
	li	a0, 1

1:
	beqz	a1, 1f
	mul	a0, a0, a2
	addi	a1, a1, -1
	j	1b

1:
	ret

_start:
	li	a0, 2
	li	a1, 3
	jal	pow

	# Setup exit ecall
	# Return value is already in a0

	li a7, 93
	ecall