AlxcBTWandClaude Opus 5.5 f22b9fa02a fix(shader): round v_fma_mixlo_f16 and v_fma_mixhi_f16 in every f16 rounding mode ...

The f16 forms of v_fma_mix threw for any FLOAT_MODE with an f16 rounding
other than to nearest even. ps5-opengl's shaders run with FLOAT_MODE
0xcc, f16 rounding toward zero with f16 denormals kept, so PPSA99005
stopped at its first draw (#2631).

The exact product-sum, already computed in f64 with round to odd, is now
rounded once in the mode's direction: scaled by the f16 step at its
exponent, truncated, floored or ceiled, and scaled back. A result beyond
65504 becomes infinity or 65504 as IEEE 754 gives for the direction. On
RDNA2 (gfx1036) -1.5 * 2^-24 + 2^-126 gives 0x8002 with round toward
-infinity, and this gives the same. Flushed f16 denormals still throw.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-11 14:59:55 +02:00

..

ARCHITECTURE.md

fix(agc): select the registered back half for a fused hull header

2026-10-11 12:36:01 +02:00

BUILD.md

build: reject an SDL2 without HIDAPI and fall back to shared SPIRV-Tools

2026-10-11 10:18:23 +02:00

CONVENTIONS.md

refactor(docs): separated user and dev in docs + compatibility file

2026-09-28 22:58:17 +03:00

HW_ORACLE.md

feat(shader): follow FP16_OVFL in every f16 result

2026-10-10 04:32:38 -03:00

PROGRESS.md

feat(tools): mark behaviourally empty bodies in the progress report

2026-10-11 11:44:28 +00:00

TechnicalDebt.md

fix(shader): round v_fma_mixlo_f16 and v_fma_mixhi_f16 in every f16 rounding mode

2026-10-11 14:59:55 +02:00