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Contents
# Convert ascii string of octal digits to integer
#
# $a0 - input, pointer to null-terminated string of chars 0-7
# $v0 - output, integer form of binary string
# $t0 - ascii value of the char pointed to
# $t1 - integer value (0-7) of the char pointed to
.globl octal_convert
octal_convert:
li $v0, 0 # Reset accumulator to 0.
loop:
lb $t0, 0($a0) # Load a character,
beq $t0, $zero, end # if it is null then return.
sll $v0, $v0, 3 # Otherwise multiply accumulator by 8,
addi $t1, $t0, -48 # calculate the value of the character,
or $v0, $v0, $t1 # and add that to the accumulator.
addi $a0, $a0, 1 # Finally, increment the pointer
j loop # and loop.
end:
jr $ra
Version data entries
396 entries across 396 versions & 1 rubygems