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VideoBackend/OGL: Prefer KHR_subgroup over NV_shader_thread.

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While the NV extension is totally fine, the KHR extension should be able to support more hardware.

For NVIDIA, the hardware either supports both or neither, it just needs a driver from the last two years.
For AMD, the drivers from late 2022-12 seems to bring support for the KHR extension.
For Intel, the KHR is also supported for some years.
This commit is contained in:
degasus
2023-01-31 18:10:48 +01:00
parent aaad0cd39f
commit 4b2aa948e6
8 changed files with 66 additions and 33 deletions
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13
Source/Core/VideoCommon/PixelShaderGen.cpp
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@ -457,15 +457,12 @@ void UpdateBoundingBox(float2 rawpos) {{
int2 pos_br = pos | 1; // round up to odd
#ifdef SUPPORTS_SUBGROUP_REDUCTION
if (CAN_USE_SUBGROUP_REDUCTION) {{
int2 min_pos = IS_HELPER_INVOCATION ? int2(2147483647, 2147483647) : pos_tl;
int2 max_pos = IS_HELPER_INVOCATION ? int2(-2147483648, -2147483648) : pos_br;
SUBGROUP_MIN(min_pos);
SUBGROUP_MAX(max_pos);
if (!IS_HELPER_INVOCATION)
{{
SUBGROUP_MIN(pos_tl);
SUBGROUP_MAX(pos_br);
if (IS_FIRST_ACTIVE_INVOCATION)
UpdateBoundingBoxBuffer(min_pos, max_pos);
}} else {{
UpdateBoundingBoxBuffer(pos_tl, pos_br);
UpdateBoundingBoxBuffer(pos_tl, pos_br);
}}
#else
UpdateBoundingBoxBuffer(pos_tl, pos_br);