pin_fp_mode ran once at start; a library imported mid-run can switch flush-to-zero /
denormals-are-zero back on. fit now checks before each opt.step, re-pins, and names the
rank and step. Verified: final parameter hashes unchanged vs 63780b7 on cuda+cpu and cpu+cpu.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
29 days ago
One arithmetic on every device: mixed CPU+GPU optimizer, replica hash check, FTZ pin, subnormal gate, live f32 audit, probe/fragment fixes (2026-10-14)