mirror of
https://github.com/KytyPS5/KytyPS5.git
synced 2026-10-22 11:56:58 +02:00
Arda Sahin
286481889f
* shader: emit float min/max as host instructions on AMD GPUs V_MIN_F32, V_MAX_F32, V_MIN3_F32 and V_MAX3_F32 were emulated with a classify-and-select sequence of about a dozen instructions each, to give the guest's NaN and signed-zero results on any host. AMD GPUs execute GLSL.std.450 NMin/NMax with those same rules, so emit them directly when the device is AMD and supports VK_KHR_shader_float_controls2. Each instruction is decorated FPFastMathMode None, since SignedZeroInfNanPreserve does not cover extended instructions. MED3 keeps its exact emulation. KYTY_EMULATED_FLOAT_MIN_MAX=1 keeps the emulation. In SAROS the two heaviest compute shaders get 37% and 59% faster on an RX 9070 XT (RADV), about 4 ms of GPU time per frame. Adds VectorMinMaxF32RuntimeEdges (runtime operands, so nothing is folded) and a --float-min-max-only mode that runs it and VectorMinMaxF32NanAndSignedZeroEdges with the emulation and, where supported, with host instructions. Developed with AI assistance (Claude Code). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * shader: gate host float min/max on RADV and check the emitted instructions * shader: drop float controls 2 from host float min/max * shader: drop the float min/max env override and atomic flag * shader: pass host capabilities to the SPIR-V emitter as a profile built once per device * shader: enable host float min/max on AMD GPUs --------- Co-authored-by: arda <ardaeska@gmail.com> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> Co-authored-by: nmzik <Nmzik@mail.ru>