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;;; fib.asm: A program that generates the fibonacci numbers up to a
;;; very large bound (~UINT64_MAX). Using the registers to store the
;;; pairs of fibonacci numbers, we ensure only a finite amount of
;;; memory is necessary for this program to function, unlike a pure
;;; stack version.
;; Setup entrypoint
global main
main:
;; Setup iterator i
push.word 1
mov.word 2
;; Setup initial REG[0] = 1 and REG[1] = 1
push.word 1
mov.word 0
push.word 1
mov.word 1
;; Print REG[0] and REG[1]
loopback:
call print_pair
;; REG[0] += REG[1]
push.reg.word 0
push.reg.word 1
plus.word
mov.word 0
;; REG[1] += REG[0]
push.reg.word 0
push.reg.word 1
plus.word
mov.word 1
push.word 12200160415121876738
push.reg.word 1
gte.word
;; Jump to `loopback`
jump.if.byte loopback
halt
print_pair:
push.byte '\t'
print.char
call print_i
push.byte ':'
print.char
push.byte ' '
print.char
call print_reg_0
push.byte '\n'
print.char
call increment_i
push.byte '\t'
print.char
call print_i
push.byte ':'
print.char
push.byte ' '
print.char
call print_reg_1
push.byte '\n'
print.char
call increment_i
ret
increment_i:
push.reg.word 2
push.word 1
plus.word
mov.word 2
ret
print_i:
push.reg.word 2
print.word
ret
print_reg_0:
push.reg.word 0
print.word
ret
print_reg_1:
push.reg.word 1
print.word
ret
|
