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| author | Kartik Agaram <vc@akkartik.com> | 2018-09-24 17:22:09 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-09-24 17:22:09 -0700 |
| commit | fd0ab85567ba0505ba57bdb3791bf83a9de1120f (patch) | |
| tree | 36bf8e61f3b043fc1c8d3f8a93afdbb3184ab5b2 /subx/apps/factorial.subx | |
| parent | 37d53a70958bfe5b1d7946229af9c12f0b865abc (diff) | |
| download | mu-fd0ab85567ba0505ba57bdb3791bf83a9de1120f.tar.gz | |
4513
Diffstat (limited to 'subx/apps/factorial.subx')
| -rw-r--r-- | subx/apps/factorial.subx | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/subx/apps/factorial.subx b/subx/apps/factorial.subx index 209206ca..3dd8bdaa 100644 --- a/subx/apps/factorial.subx +++ b/subx/apps/factorial.subx @@ -63,19 +63,11 @@ factorial: # EBX: n-1 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none 3/r32/EBX 4/disp8 . # copy *(ESP+4) to EBX 81 5/subop/subtract 3/mod/direct 3/rm32/EBX . . . . . 1/imm32 # subtract 1 from EBX - # prepare call - 55/push-EBP - 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # EAX: factorial(n-1) 53/push-EBX e8/call . . . . . . factorial/disp32 # discard arg 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add 4 to ESP - # clean up after call - 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP - 5d/pop . . . . . . . . # pop to EBP - # refresh n - 8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none 2/r32/EDX 4/disp8 . # copy *(ESP+4) to EDX # return n * factorial(n-1) f7 4/subop/multiply 1/mod/*+disp8 4/rm32/sib 4/base/ESP 4/index/none 4/disp8 . # multiply *(ESP+4) (n) into EAX (factorial(n-1)) # TODO: check for overflow |