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colony.asm
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colony.asm
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PRINT_INT = 1 # code for syscall to print integer
PRINT_STRING = 4 # code for syscall to print a string
READ_INT = 5 # code for syscall to read an int
MIN_BOARD_SIZE = 4
MAX_BOARD_SIZE = 30
MIN_GENERATIONS = 0
MAX_GENERATIONS = 20
MIN_CELLS_ALIVE = 0
#
# DATA DECLARATIONS
#
.data
into_msg:
.ascii "\n**********************\n"
.ascii "**** Colony ****\n"
.asciiz "**********************\n"
start_generation_string:
.asciiz "\n==== GENERATION "
end_generation_string:
.asciiz " ===="
#
# MAIN PROGRAM
#
.text
.align 2
.globl main
main:
addi $sp, $sp, -32# space for return address/doubleword aligned
sw $ra, 28($sp) # store the ra on the stack
sw $s6, 24($sp) # location of the neighbors array
sw $s5, 20($sp) # location of next generation array
sw $s4, 16($sp) # location of current generation array
sw $s3, 12($sp) # number of cells alive in B
sw $s2, 8($sp) # number of cells alive in A
sw $s1, 4($sp) # number of generations
sw $s0, 0($sp) # board size
la $a0, into_msg
jal print_string
.globl ask_for_board_size_init
jal ask_for_board_size_init
move $s0, $v0 # s0 is board size
.globl allocate_mem
mul $a0, $s0, $s0
jal allocate_mem
move $s4, $v0 # s4 is location of current generation array
mul $a0, $s0, $s0
jal allocate_mem
move $s5, $v0 # s5 is location of next generation array
# initialize the arrays
move $a0, $s4
mul $a1, $s0, $s0
jal init_array
move $a0, $s5
mul $a1, $s0, $s0
jal init_array
.globl ask_for_num_generations_init
jal ask_for_num_generations_init
move $s1, $v0 # s1 is number of generations
move $a0, $s0
.globl ask_for_num_live_cells_A_init
jal ask_for_num_live_cells_A_init
move $s2, $v0 # s2 is number of cells alive in A
.globl ask_for_starting_locations_init
move $a0, $s4
move $a1, $s2
move $a2, $s0
li $a3, 1
jal ask_for_starting_locations_init
.globl ask_for_num_live_cells_B_init
move $a0, $s0
jal ask_for_num_live_cells_B_init
move $s3, $v0 # s3 is number of cells alive in B
move $a0, $s4
move $a1, $s3
move $a2, $s0
li $a3, 2
jal ask_for_starting_locations_init
# make array for storing neighbor locations
li $a0, 8
jal allocate_mem
move $s6, $v0
li $a0, 1
li $a1, 1
move $a2, $s0
move $a3, $s6
.globl get_neighbor_locations
jal get_neighbor_locations
move $t0, $v0
print_generations:
la $a0, start_generation_string
jal print_string
move $a0, $zero
jal print_number
la $a0, end_generation_string
jal print_string
.globl newline
la $a0, newline
jal print_string
.globl print_board
move $a0, $s4
move $a1, $s0
jal print_board
beq $s1, $zero, print_generations_skip_newline
la $a0, newline
jal print_string
print_generations_skip_newline:
li $t4, 1
addi $t5, $s1, 1
print_generations_loop:
beq $t4, $t5, print_generations_done
la $a0, start_generation_string
jal print_string
move $a0, $t4
jal print_number
la $a0, end_generation_string
jal print_string
la $a0, newline
jal print_string
move $a0, $s4
move $a1, $s5
move $a2, $s0
move $a3, $s6
jal get_next_generation
move $t0, $s4
move $s4, $s5
move $s5, $t0
move $a0, $s4
move $a1, $s0
jal print_board
addi $t4, $t4, 1
bne $t4, $t5, print_generations_loop_newline
j print_generations_loop
print_generations_loop_newline:
la $a0, newline
jal print_string
j print_generations_loop
print_generations_done:
la $a0, newline
jal print_string
j exit_program
.globl exit_program
exit_program:
#
# Now exit the program.
#
lw $ra, 28($sp) # clean up stack
lw $s6, 24($sp)
lw $s5, 20($sp)
lw $s4, 16($sp)
lw $s3, 12($sp)
lw $s2, 8($sp)
lw $s1, 4($sp)
lw $s0, 0($sp)
addi $sp, $sp, 32
jr $ra
#
# Name; print_number
#
# Description: This routine reads a number then a newline to stdout
# Arguments: a0: the number to print
# Returns: nothing
#
.globl print_number
print_number:
li $v0, PRINT_INT
syscall #print a0
jr $ra
#
# Name; print_string
#
# Description: This routine prints out a string pointed to by a0
# Arguments: a0: a pointer to the string to print
# Returns: nothing
#
.globl print_string
print_string:
li $v0, PRINT_STRING
syscall #print a0
jr $ra
# a0 is row
# a1 is col
# a2 is width of board
.globl rowcol_to_num
rowcol_to_num:
move $t0, $a2
# addi $t0, $t0, -1
mul $v0, $a0, $t0
add $v0, $v0, $a1
li $t0, 4
mul $v0, $v0, $t0
jr $ra
# a0 location to insert
# a1 value to insert
# a2 is location of array
.globl set
set:
add $t0, $a2, $a0
sw $a1, 0($t0)
jr $ra
# a0 location to get
# a1 array location
.globl get
get:
add $t0, $a1, $a0
lw $v0, 0($t0)
jr $ra
.globl init_array
# Initializes an array to all zeros
# a0 location of array to initialize
# a1 size of array
init_array:
move $t0, $a0
move $t1, $a1
li $t3, 1
init_array_loop:
beq $t2, $t1, init_array_done
sw $zero, 0($t0)
addi $t0, $t0, 4
addi $t2, $t2, 1
j init_array_loop
init_array_done:
jr $ra
# a0 - location of current generation
# a1 - location of next generation
# a2 - width
# s3 - neighbors array
get_next_generation:
addi $sp, $sp, -32
sw $s0, 0($sp)
sw $s1, 4($sp)
sw $s2, 8($sp)
sw $s3, 12($sp)
sw $s4, 16($sp)
sw $s5, 20($sp)
sw $s6, 24($sp)
sw $ra, 28($sp)
move $s0, $a0 # s0 is location of current
move $s1, $a1 # s1 is location of next
move $s2, $a2 # s2 is width
move $s3, $a3 # s3 is neighbors array
li $s4, 0 # counters
get_next_generation_loop_row:
beq $s4, $s2, get_next_generation_done
li $s5, 0
get_next_generation_loop_col:
beq $s5, $s2, get_next_generation_loop_row_done
move $a0, $s4
move $a1, $s5
move $a2, $s2
move $a3, $s3
jal get_neighbor_locations
move $a0, $v0
move $a1, $s0
jal get_location_count
move $s6, $v0 # location count
move $a0, $s4
move $a1, $s5
jal rowcol_to_num
move $a0, $v0
move $a1, $s0
jal get # contents of current cell
move $a0, $v0
move $a1, $s6
jal what_to_place
move $s6, $v0
move $a0, $s4
move $a1, $s5
jal rowcol_to_num
move $a0, $v0
move $a1, $s6
move $a2, $s1
jal set
addi $s5, $s5, 1
j get_next_generation_loop_col
get_next_generation_loop_row_done:
addi $s4, $s4, 1
j get_next_generation_loop_row
get_next_generation_done:
lw $s0, 0($sp)
lw $s1, 4($sp)
lw $s2, 8($sp)
lw $s3, 12($sp)
lw $s4, 16($sp)
lw $s5, 20($sp)
lw $s6, 24($sp)
lw $ra, 28($sp)
addi $sp, $sp, 32
jr $ra
# a0 - neighbor locations
# a1 - array to count from
get_location_count:
addi $sp, $sp, -24
sw $s0, 0($sp)
sw $s1, 4($sp)
sw $s2, 8($sp)
sw $s3, 12($sp)
sw $s4, 16($sp)
sw $ra, 20($sp)
move $s0, $a0
move $s1, $a1
li $s2, 0
li $s3, 8
li $s4, 0
get_location_count_loop:
beq $s2, $s3, get_location_count_done
lw $a0, 0($s0)
move $a1, $s1
jal get
beq $v0, $zero, get_location_count_loop_end
li $t0, 1
beq $v0, $t0, get_location_count_loop_player1
li $t0, 2
beq $v0, $t0, get_location_count_loop_player2
get_location_count_loop_player1:
addi $s4, $s4, 1
j get_location_count_loop_end
get_location_count_loop_player2:
addi $s4, $s4, -1
j get_location_count_loop_end
get_location_count_loop_end:
addi $s0, $s0, 4
addi $s2, $s2, 1
j get_location_count_loop
get_location_count_done:
move $v0, $s4
lw $s0, 0($sp)
lw $s1, 4($sp)
lw $s2, 8($sp)
lw $s3, 12($sp)
lw $s4, 16($sp)
lw $ra, 20($sp)
addi $sp, $sp, 24
jr $ra
# a0 - contents
# a1 - count around
what_to_place:
beq $a0, $zero, what_to_place_no_cell
li $t0, 1
beq $a0, $t0, what_to_place_player1_cell
li $t0, 2
beq $a0, $t0, what_to_place_player2_cell
what_to_place_no_cell:
li $t0, 3
beq $a1, $t0, what_to_place_player1
li $t0, -3
beq $a1, $t0, what_to_place_player2
j what_to_place_none
what_to_place_player1_cell:
li $t0, 2
beq $a1, $t0, what_to_place_player1
li $t0, 3
beq $a1, $t0, what_to_place_player1
j what_to_place_none
what_to_place_player2_cell:
li $t0, -2
beq $a1, $t0, what_to_place_player2
li $t0, -3
beq $a1, $t0, what_to_place_player2
j what_to_place_none
what_to_place_none:
li $v0, 0
j what_to_place_done
what_to_place_player1:
li $v0, 1
j what_to_place_done
what_to_place_player2:
li $v0, 2
j what_to_place_done
what_to_place_done:
jr $ra