## LSU EE 4720 Computer Architecture Fall 2010 # # .data msg: .asciiz "The value of 0x%/s4/x is %/a1/s\n" str: .align 4 .space 12 values: .word 1234 .word 0x1234 .word 0xf00d .word -1 .text .globl __start __start: la $s2, values addi $s3, $0, -1; MLOOP: lw $a0, 0($s2) la $a1, str lui $t0, 0x2020 ori $t0, $t0, 0x2020 sw $t0, 0($a1) sw $t0, 4($a1) sw $t0, 8($a1) sb $0, 11($a1) jal itos addi $a2, $0, 10 lw $s4, 0($s2) la $a1, str la $a0, msg addi $v0, $0, 11 syscall addi $s2, $s2, 4 bne $s4, $s3 MLOOP li $v0, 10 syscall nop ############################################################################### # # Int to Hex String # itos: ## Register Usage # # $a0: CALL VALUE: Integer to convert # $a1: Address of storage. # Initialized as null-terminated string of blanks. # $a2: Length of storage. # # RETURN: # Write storage with hex representation of $a0. # # NOTE: 'a' = 97, 'z' = 122, 'a' - 'A' = 32 # Note: '0' = 48 = 0x30 add $t4, $a1, $a2 addi $t4, $t4, -1 addi $0, $0, 10 add $t4, $t4, $0 LOOP: andi $t0, $a0, 0xf slti $t3, $t0, 10 # t3 = t0 < 10; bne $t3, $0, SKIP addi $t0, $t0, 0x30 addi $t0, $t0, 39 SKIP: sb $t0, 0($t4) srl $a0, $a0, 4 bne $a0, $0 LOOP addi $t4, $t4, -1 DONE: jr $ra nop