Files
ww/test/wcc
Hojun-Cho 559b77db40 selfhost/cmd/w6a: align parsenum to strtoll(base 0) semantics (#62)
w6a's parsenum diverged from the C twin's strtoll(s,end,0)
(cmd/w6a/lex.c:30) on three hand-written-asm edge shapes (all
gate-blind — w6c emits the canonical $5/$8/-8(BP), never these):
  (a) `$ 5`  — leading whitespace: strtoll skips it (->5); ww had no
              skip and silently encoded imm 0.
  (b) `$08`  — strtoll base-0 reads a leading 0 as octal, stops at '8'
              (->0); ww parsed it as decimal 8.
  (c) `-(BP)` — strtoll/cstage require a digit after the sign, so a bare
              `-(` is unrecognised operand; ww silently took it as 0(BP).
Add the whitespace skip + octal base-0 detection to parsenum, and the
digit-after-sign guard to the operand scanner — both assemblers now
agree byte-for-byte (a/b) and both reject (c).

Not a Hare item (w6a is ww's plan9-lineage assembler); reference is the
C strtoll twin. w6a embeds into its own combined.ww snapshot; regen'd.
530_w6a_parsenum pins the byte-identity + both-reject matrix.
2026-06-13 11:03:42 +09:00
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