【MIPS】解一元二次方程
编程环境：PCspim
1 .text 2 .globl main 3 4 puzzle: 5 la $a0,output1 6 li $v0,4 7 syscall 8 jr $ra 9 10 solution: 11 move $t6,$zero 12 radical: 13 addi $t6,$t6,1 14 mul $t7,$t6,$t6 15 blt $t7,$t5,radical 16 17 deal: 18 mul $t3,$t0,2 19 sub $t4,$zero,$t1 20 add $t5,$t4,$t6 21 div $t5,$t3 22 la $a0,output2 23 li $v0,4 24 syscall 25 mflo $a0 26 li $v0,1 27 syscall 28 sub $t5,$t4,$t6 29 div $t5,$t3 30 la $a0,output3 31 li $v0,4 32 syscall 33 mflo $a0 34 li $v0,1 35 syscall 36 jr $ra 37 38 solve: 39 sub $t8,$zero,$t1 40 mul $t9,$t0,2 41 div $t8,$t9 42 la $a0,output4 43 li $v0,4 44 syscall 45 mflo $a0 46 li $v0,1 47 syscall 48 jr $ra 49 50 main: 51 la $a0,input1 52 li $v0,4 53 syscall 54 li $v0,5 55 syscall 56 move $t0,$v0 57 la $a0,input2 58 li $v0,4 59 syscall 60 li $v0,5 61 syscall 62 move $t1,$v0 63 la $a0,input3 64 li $v0,4 65 syscall 66 li $v0,5 67 syscall 68 move $t2,$v0 69 mul $t3,$t1,$t1 70 mul $t4,$t0,4 71 mul $t4,$t4,$t2 72 sub $t5,$t3,$t4 73 move $t9,$t5 74 bgt $t5,$zero,solution 75 beq $t5,$zero,solve 76 blt $t5,$zero,puzzle 77 78 .data 79 input1: .asciiz "Please input a:\n" 80 input2: .asciiz "Please input b:\n" 81 input3: .asciiz "Please input c:\n" 82 output1: .asciiz "No result!\n" 83 output2: .asciiz "The number x1 is:\n" 84 output3: .asciiz "\nThe number x2 is:\n" 85 output4: .asciiz "The only solve is:\n"
效果演示：（以 X²-4X+3=0，X²-2X+1=0，X²-X+1=0 为例）
