radiusCheckerAssembly/firstProgram.asm at main · RMarx1456/radiusCheckerAssembly · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
section .data
rad DQ 10.0
xOffset DQ 3.0
yOffset DQ 2.0

global failMsg
 failMsg db '(10, 1) is not inside a circle at (3,2) with a radius of ten', 0
global passMsg
 passMsg db '(10, 1) is inside a circle at (3,2) with a radius of ten', 0

len1 equ $- failMsg
len2 equ $- passMsg

guess dq 8.0

twox dq 2.0

zero dq 0.0

section .bss
xCord DQ 1.0
yCord DQ 10.0


section .text


global main

main:
    ; move x, y coordinate to xmm0, 1
    movsd xmm0, [xCord]
    movsd xmm1, [yCord]
    subsd xmm0, [xOffset]
    subsd xmm1, [yOffset]

    ;calculate # in sqroot

    ;x
    movsd xmm3, xmm0
    mulsd xmm3, xmm3
    movsd xmm2, xmm3
    xorps xmm3, xmm3 ;clear register

    ;y
    movsd xmm3, xmm1
    mulsd xmm3, xmm3
    addsd xmm2, xmm3
    xorps xmm3, xmm3 ;clear register

    ; 0,1 holds coordinates, 2 holds sqrt#

    ; ready xmm3 for loop

    movsd xmm3, qword [guess]
    mov ecx, 3
    loop_iteration:
    ; 4 for x^2 - guess, 5 for 2x
        movsd xmm4, xmm3
        movsd xmm5, xmm3
        ;x^2 - guess
        mulsd xmm4, xmm4
        subsd xmm4, xmm3
        ;2x
        mulsd xmm5, [twox]
        ;push f(x) to xmm3
        movsd xmm3, xmm4
        ;divide f(x) by f'(x)
        divsd xmm3, xmm5

    loop loop_iteration
    ;clear xmm4 and xmm5 registers
    xorps xmm4, xmm4
    xorps xmm5, xmm5

    ;move dereferenced radius to xmm5
    movsd xmm5, qword [rad]

    ;compare approximated root to rad
    ucomisd xmm3, xmm5

    jbe good

    ja bad


    good:
    mov rdi, 1
    mov rsi, passMsg
    mov rdx, len2
    mov rax, 1
    syscall
    jmp end

    bad:
    mov rdi, 1
    mov rsi, failMsg
    mov rdx, len1
    mov rax, 1
    syscall
    jmp end

    end:
    mov rax, 60
    xor rdi, rdi
    syscall