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Vulkan: Fix subgroup reduction

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It seems that we were writing values from helper invocations, which
produces wrong results.
This commit is contained in:
Techjar 2021-06-07 22:32:25 -04:00
parent 638909aec6
commit 58238e75a7
1 changed files with 1 additions and 1 deletions
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Source/Core/VideoBackends/Vulkan/ShaderCompiler.cpp
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@ -103,7 +103,7 @@ static const char SUBGROUP_HELPER_HEADER[] = R"(
#define SUPPORTS_SUBGROUP_REDUCTION 1
#define CAN_USE_SUBGROUP_REDUCTION true
#define IS_HELPER_INVOCATION gl_HelperInvocation
#define IS_FIRST_ACTIVE_INVOCATION (gl_SubgroupInvocationID == subgroupBallotFindLSB(subgroupBallot(true)))
#define IS_FIRST_ACTIVE_INVOCATION (gl_SubgroupInvocationID == subgroupBallotFindLSB(subgroupBallot(!gl_HelperInvocation)))
#define SUBGROUP_MIN(value) value = subgroupMin(value)
#define SUBGROUP_MAX(value) value = subgroupMax(value)
)";