mars.asm

#-------------------\ # | # MIPS MARS Bitmap | # | # Lucas Larson | # 2019-03-26 | # | # # # # # # # # # # / .data frameBuffer: .space 0x80000 # (512 × 256)₁₆ pixels n: .word 15 # n = 2⁴ - 1 m: .word 31 # m = 2⁵ - 1 .text drawLine: la $t1, frameBuffer color: li $t3, 0x00FFFF00 # $t3 ← 0x00RRGGbb yellow li $t4, 0x000000FF # $t4 ← 0x00rrggBB blue count: li $t6, 131072 # $t6 = 512 × 256 li $t9, 0 # $t9, $t2, and $t5 ← 0 li $t2, 0 # $t9, $t2, and $t5 ← 0 li $t5, 0 # $t9, $t2, and $t5 ← 0 yellow: sw $t3, 0 ($t1) # fill square addi $t1, $t1, 4 # increment address by 4 addi $t9, $t9, 1 # $t9++ beq $t9, $t6, reset # if $t9 == 512 × 256 goto reset j yellow # else goto yellow reset: subi $t1, $t1, 4 # go to previous address subi $t9, $t9, 1 # $t9-- beq $t9, 0, crux # if $t9 == 0 goto crux j reset # else goto reset loop: subi $t1, $t1, 512 # subtract amount wanted addi $t1, $t1, 2048 # go to next row addi $t9, $zero, 0 addi $t2, $t2, 1 # $t2++ beq $t2, 128, exit # if $t2 == distance goto exit j box # else goto box crux: edge: addi $t1, $t1, 2048 # row + 512 × 4 addi $t5, $t5, 1 # $t3++ beq $t5, 64, box # if $t9 == 2⁶ goto box j edge # else goto edge box: sw $t4, 768 ($t1) # 768 = (2⁵ × 2⁵ + 2⁵ × 2⁴) / 2 addi $t1, $t1, 4 # increment address addi $t9, $t9, 1 # address increment check beq $t9, 128, loop # if $t9 == 2⁷ goto loop j box # else goto box exit: li $v0, 10 # exit code syscall: syscall