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| author | Kartik Agaram <vc@akkartik.com> | 2020-09-15 22:21:15 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-09-15 22:52:41 -0700 |
| commit | ae470b42f102d5da4f7d4255a47e3cf582079f33 (patch) | |
| tree | aa251ea7734370b9c152a5cf08a7b97c9c1de0c1 /127next-word.subx | |
| parent | 8815cf7d57e738731dfc43680b4eccbaef9d822c (diff) | |
| download | mu-ae470b42f102d5da4f7d4255a47e3cf582079f33.tar.gz | |
6781 - new app: RPN (postfix) calculator
This was surprisingly hard; bugs discovered all over the place.
Diffstat (limited to '127next-word.subx')
| -rw-r--r-- | 127next-word.subx | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/127next-word.subx b/127next-word.subx index c3e9762d..6a186656 100644 --- a/127next-word.subx +++ b/127next-word.subx @@ -20,14 +20,13 @@ next-word: # line: (addr stream byte), out: (addr slice) 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi # edi = out 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 7/r32/edi 0xc/disp8 . # copy *(ebp+12) to edi - # skip-chars-matching(line, ' ') + # skip-chars-matching-whitespace(line) # . . push args - 68/push 0x20/imm32/space ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call - e8/call skip-chars-matching/disp32 + e8/call skip-chars-matching-whitespace/disp32 # . . discard args - 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp + 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp $next-word:check0: # if (line->read >= line->write) clear out and return # . eax = line->read |