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wmmnola/fizzbuzz.s

Created October 26, 2019 23:23
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AT&T Assembly implementation of Fizzbuzz
Raw
fizzbuzz.s
.fizz : .string "Fizz"
.buzz : .string "Buzz"
.endline : .string ":%d \n"
.global main
.newline:
push %rdi
push %rsi
mov $.endline, %rdi
mov %r8, %rsi
xor %rax, %rax
call printf
pop %rdi
pop %rsi
jmp _fizzbuzz
.printfizz:
push %rdi
push %rsi
mov $.fizz, %rdi
xor %rax, %rax
call printf
pop %rsi
pop %rdi
ret
.printbuzz:
push %rdi
push %rsi
mov $.buzz, %rdi
xor %rax, %rax
call printf
pop %rsi
pop %rdi
ret
.checkThree: # Store what to divide in %rdi
xor %rdx, %rdx
mov %rdi, %rax
mov $3, %rbx
idiv %rbx
cmp $0, %rdx
je .printfizz
ret
.checkFive: #Store what to divide in %rdi
xor %rdx, %rdx
mov %rdi, %rax
mov $5, %rbx
idiv %rbx
cmp $0, %rdx
je .printbuzz
ret
fizzbuzz: # maximum value in %rdi
mov $0, %r8
mov $5, %r10
push %r8
_fizzbuzz:
pop %r8
inc %r8
push %rdi
mov %r8, %rdi
call .checkThree
call .checkFive
pop %rdi
cmp %r8, %rdi
push %r8
jge .newline
pop %r8
ret
main:
mov $30, %rdi
call fizzbuzz
ret
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