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global possible_seq
section .data
TRIB: dq 1, 1, 2, 4, 7 ; tribonacci sequence (without first 2 zeroes)
section .text
possible_seq:
mov eax, 1 ; set up return value
xor ecx, ecx ; # of connected elements counter
lea rdx, [rdi + 4 * rsi - 4] ; pointer to the last element
lea r8, [rel TRIB]
jmp .loop
.ncon:
imul rax, qword [r8 + 8 * rcx]
xor ecx, ecx
add rdi, 4
cmp rdi, rdx
jae .return
.loop:
mov esi, dword [rdi + 4]
sub esi, dword [rdi]
cmp esi, 1
jne .ncon
inc ecx
add rdi, 4
cmp rdi, rdx
jb .loop
.return:
ret
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