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riscemu/examples/fibs.asm

24 lines
811 B
NASM

// Example program (c) by Anton Lydike
// this calculates the fibonacci sequence and stores it in ram
.data
fibs: .space 56
.text
main:
addi s1, zero, 0 // storage index
addi s2, zero, 56 // last storage index
addi t0, zero, 1 // t0 = F_{i}
addi t1, zero, 1 // t1 = F_{i+1}
loop:
sw t0, fibs(s1) // save
add t2, t1, t0 // t2 = F_{i+2}
addi t0, t1, 0 // t0 = t1
addi t1, t2, 0 // t1 = t2
addi s1, s1, 4 // increment storage pointer
blt s1, s2, loop // loop as long as we did not reach array length
// exit gracefully
addi a0, zero, 0
addi a7, zero, 93
scall // exit with code 0