Contents

# Convert ascii string of trinary digits to integer
#
# Strategy: loop through char bytes until the null byte is reached. At each step,
# triple the accumulator value then add to it the integer value of the char.
# Tripling of N is effected by adding N to N left-shifted.
#
# $a0 - input, pointer to null-terminated string of 0's, 1's and 2's
# $v0 - output, integer form of binary string
# $t0 - ascii value of the char pointed to
# $t1 - integer value (0, 1 or 2) of the char pointed to
# $t2 - temp used in tripling procedure

.globl trinary_convert

trinary_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     $t2, $v0, 1             # Otherwise triple the accumulator by first shifting
        addu    $v0, $v0, $t2           # then adding to its prior value.
        addi    $t1, $t0, -48           # Also calculate the value of the character,
        addu    $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

Version	Path
trackler-2.2.1.180	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.179	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.178	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.177	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.176	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.175	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.174	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.173	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.172	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.171	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.170	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.169	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.167	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.166	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.165	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.164	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.163	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.162	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.161	tracks/mips/exercises/trinary/example.mips
trackler-2.2.1.160	tracks/mips/exercises/trinary/example.mips