| 1 | .data 32 |
| 2 | format: |
| 3 | .c "nfibs(%d) = %d\n" |
| 4 | |
| 5 | .code |
| 6 | jmpi main |
| 7 | |
| 8 | name nfibs |
| 9 | nfibs: |
| 10 | prolog |
| 11 | arg $in |
| 12 | getarg %r0 $in // R0 = n |
| 13 | beqi ref %r0 0 |
| 14 | movr %r1 %r0 |
| 15 | movi %r0 1 |
| 16 | blei_u ref %r1 2 |
| 17 | subi %r2 %r1 2 |
| 18 | movr %r1 %r0 |
| 19 | loop: |
| 20 | subi %r2 %r2 1 // decr. counter |
| 21 | movr %v0 %r0 // V0 = R0 |
| 22 | addr %r0 %r0 %r1 // R0 = R0 + R1 |
| 23 | movr %r1 %v0 // R1 = V0 |
| 24 | bnei loop %r2 0 // if (R2) goto loop |
| 25 | ref: |
| 26 | retr %r0 // RET = R0 |
| 27 | epilog |
| 28 | |
| 29 | name main |
| 30 | main: |
| 31 | prolog |
| 32 | arg $argc |
| 33 | arg $argv |
| 34 | |
| 35 | getarg_i %r0 $argc |
| 36 | blei default %r0 1 |
| 37 | getarg %r0 $argv |
| 38 | addi %r0 %r0 $(__WORDSIZE >> 3) |
| 39 | ldr %r0 %r0 |
| 40 | prepare |
| 41 | pushargr %r0 |
| 42 | finishi @atoi |
| 43 | retval %r0 |
| 44 | jmpi call |
| 45 | |
| 46 | default: |
| 47 | movi %r0 32 |
| 48 | |
| 49 | call: |
| 50 | movr %v0 %r0 |
| 51 | prepare |
| 52 | pushargr %r0 |
| 53 | finishi nfibs |
| 54 | retval %r0 |
| 55 | prepare |
| 56 | pushargi format |
| 57 | ellipsis |
| 58 | pushargr %v0 |
| 59 | pushargr %r0 |
| 60 | finishi @printf |
| 61 | ret |
| 62 | epilog |