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[Feat] (Subgroups): use native subgroups or emulate them on both backends

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swung0x48
2026-10-13 06:03:57 -04:00
parent cfbaffd757
commit d6b0eba8fe
50 changed files with 909 additions and 360 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/ProgramFactory.cpp
+2 -2
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@@ -3698,8 +3698,8 @@ namespace MobileGL::MG_Backend::DirectVulkan {
// GL_KHR_shader_subgroup handling (SubgroupSupportPolicy.h). Native subgroup
// operations execute natively; module repairs keep the GL contract intact
// around them. The opt-in emulation path replaces them only on devices with no
// subgroup support at all (MOBILEGL_MAGMA_EMULATE_SUBGROUP).
// around them. The emulation path replaces them on devices with no subgroup
// support at all, or when MOBILEGL_SUBGROUP_EMULATION forces it.
if (stages[i] == ShaderStage::Compute) {
// Program 203 broadcasts the first reduction through
// prefixSumCache[0], then lets the second reduction overwrite that