Phase 5 batch 4 (5d) — partial: VSCR.NJ subnormal flush for VMX float
arithmetic. Xbox 360 always boots with NJ=1, so games expect inputs
and outputs flushed to ±0.
- PPCBUG-435 vaddfp/vaddfp128/vsubfp/vsubfp128/vmulfp128: previously
no flush at all on these opcodes (only vmaddfp family flushed).
Now flushes both inputs and output per Canary's unconditional model.
- PPCBUG-436 vmsum3fp128/vmsum4fp128: per-product intermediates now
flushed individually (was only the final sum).
- PPCBUG-437 vmaddfp/vmaddfp128/vmaddcfp128/vnmsubfp/vnmsubfp128:
outputs now flushed (inputs were already flushed).
PPCBUG-185 (FPSCR.NI flush for scalar FPU) deferred — requires adding
a NI bit constant and post-op flush wrapper across all *sx arms; will
land in a focused sub-batch.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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