MIPS and SPIM tutorial

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To make choices we can use an IF-THEN-ELSE construct
if_then_else.s Branch Not Equal: bne Load this program into <strong>SPIM</strong> <strong>and</strong> experiment wiht different values for a & b. Single step to follow the execution. .data STR_THEN: .asciiz "equal" STR_ELSE: .asciiz "not equal" .text .globl main main: li $t0, 15 # a addi $t1, $zero, 15 # b if: bne $t0, $t1, else # if (a==b) then: # system call for print_str # print equal else: li $v0, 4 la $a0, STR_THEN syscall j end_if # system call for print_str # print not equal li $v0, 4 la $a0, STR_ELSE syscall end_if: jr $ra
Page 1 and 2: MIPS and SPIM tutorial Part Four: S
Page 3 and 4: .asciiz A directive that stores a N
Page 5 and 6: Load Byte: lb Ok, just like Load Wo
Page 7 and 8: The label STR is refering to the ad
Page 9 and 10: Load Byte $t2 is 0x00000061 The con
Page 11 and 12: Load Byte $t4 is 0x00000063 The con
Page 13 and 14: Word stored in $t1 Character ’d
Page 15 and 16: x68 1 Word Character ’d’ ’c
Page 17 and 18: A MIPS processor can be configured
Page 19 and 20: When you run this program, a consol
Page 21 and 22: loop.s .text .globl main main: add
Page 23 and 24: loop.s .text .globl main main: add
Page 25 and 26: Load the source file loop.s
Page 27 and 28: Machine Instruction: 0x11100006 Hex
Page 29: When you run this program, a consol
Page 33 and 34: array.s ARRAY is a label, i.e, the
Page 35 and 36: array.s ARRAY: .word 1 1 2 3 5 8 13
Page 37 and 38: Example: 5 10 = 00101 2 A clever wa
Page 39 and 40: When you run this program, a consol
Page 41 and 42: array_of_string.s Declear three str
Page 43 and 44: array_of_string.s (text segment par
Page 45 and 46: ASCII(’h’) = 0x68 ASCII(’e’
Page 47: You are now done with part four of

MIPS and SPIM tutorial

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