Contents

# Compute the Scrabble score for a given word.
#
# Strategy: use a look-up table to increment the current score by value of each letter
#
# $a0 - input, pointer to null-terminated string of chars
# $v0 - output, integer representing word score
# $t0 - letter value lookup table
# $t1 - an encountered character

.globl scrabble_score

scrabble_score:
        li      $v0, 0                  # Reset set to 0.
        la      $t0, lettervals         # Load address of lookup into register.

loop:
        lb      $t1, 0($a0)             # Load a character,
        beq     $t1, $zero, done        # if end of string, return true.

        addi    $t2, $t1, -65           # If less than 'A'...
        blt     $t2, $zero, increment   # continue to next letter.

        addi    $t1, $t1, -97           # Find offset from 'a'.
        blt     $t1, $zero, downcase    # If negative, presume upper case, so downcase

score_letter:
        sll     $t1, $t1, 2             # compute offset in bytes
        addu    $t1, $t1, $t0           # use it to calcute address in lookup,
        lw      $t3, 0($t1)             # retrieve its integer value,
        addu    $v0, $v0, $t3           # add letter score to word score

increment:
        addi    $a0, $a0, 1             # Finally, increment the pointer
        j       loop                    # and loop.

downcase:
        addi    $t1, $t1, 32            # Upper -> lower ascii value
        j       score_letter

done:
        jr      $ra

.data

                # A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q   R  S  T  U  V  W  X  Y  Z
lettervals: .word 1, 3, 3, 2, 1, 4, 2, 4, 1, 8, 5, 1, 3, 1, 1, 3, 10, 1, 1, 1, 1, 4, 4, 8, 4, 10

Version data entries

396 entries across 396 versions & 1 rubygems

Version	Path
trackler-2.2.1.119	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.118	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.117	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.116	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.115	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.114	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.113	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.111	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.110	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.109	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.108	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.107	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.106	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.105	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.104	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.103	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.102	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.101	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.100	tracks/mips/exercises/scrabble-score/example.mips
trackler-2.2.1.99	tracks/mips/exercises/scrabble-score/example.mips