Fix Constant-YOP table, Type 18, truncation guards

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Type 9 Constant-YOP: Implement exact constant table from docs.
  Index = (YY<<2)|CC, value = 1<<idx for BO=01, -(1<<idx)-1
  for BO=11.  Special case idx=15: -32768 / +32767.
  (was: simple cc with optional negate, completely wrong values)

Type 18: Fix DIS encoding to check for bit pattern 10 (was 01).
  Verified all 8 modes against assembler: ENA/DIS for
  AS, MM, BR, TI all correct.

Truncation guards: Use saved 'avail' from original op->size
  instead of checking op->size after it was set to 3.
  (was: always true, guards never triggered)

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This commit is contained in:

Dr. Christian Giessen

2026-04-22 20:05:17 +00:00

parent 1c28f027b8

commit ae98262bb7

3 changed files with 37 additions and 10 deletions

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