.section .data
msj_esc: .asciz "Triángulo escaleno\n"
msj_iso: .asciz "Triángulo isósceles\n"
msj_equ: .asciz "Triángulo equilátero\n"
buffer_a: .space 8
buffer_b: .space 8
buffer_c: .space 8
.section .text
.global _start
_start:
// Leer lado a
mov x0, #0
ldr x1, =buffer_a
mov x2, #8
mov x8, #63
svc 0
// Convertir a
ldr x1, =buffer_a
bl ascii_to_int
mov w20, w0 // w20 = a
// Leer lado b
mov x0, #0
ldr x1, =buffer_b
mov x2, #8
mov x8, #63
svc 0
// Convertir b
ldr x1, =buffer_b
bl ascii_to_int
mov w21, w0 // w21 = b
// Leer lado c
mov x0, #0
ldr x1, =buffer_c
mov x2, #8
mov x8, #63
svc 0
// Convertir c
ldr x1, =buffer_c
bl ascii_to_int
mov w22, w0 // w22 = c
// ----------------------
// Comparaciones
// ----------------------
// Si a == b y b == c → equilátero
cmp w20, w21
bne check_isosceles
cmp w21, w22
bne check_isosceles
// Equilátero
mov x0, #1
ldr x1, =msj_equ
mov x2, #21
mov x8, #64
svc 0
b end
check_isosceles:
// Si a == b || b == c || a == c → isósceles
cmp w20, w21
beq isosceles
cmp w21, w22
beq isosceles
cmp w20, w22
beq isosceles
// Escaleno
mov x0, #1
ldr x1, =msj_esc
mov x2, #20
mov x8, #64
svc 0
b end
isosceles:
mov x0, #1
ldr x1, =msj_iso
mov x2, #22
mov x8, #64
svc 0
end:
// Salir
mov x0, #0
mov x8, #93
svc 0
// -----------------------------------------------------------
// ascii_to_int: convierte buffer ASCII a entero positivo
// Entrada: x1 = buffer
// Salida: w0 = número
// -----------------------------------------------------------
ascii_to_int:
mov w0, #0
mov w2, #0
mov w3, #10
parse_loop:
add x4, x1, x2
ldrb w5, [x4]
cmp w5, #'0'
blt end_parse
cmp w5, #'9'
bgt end_parse
sub w5, w5, #'0'
mul w0, w0, w3
add w0, w0, w5
add w2, w2, #1
b parse_loop
end_parse:
ret
