1 files changed, 58 insertions, 0 deletions
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_vote.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_vote.cpp
new file mode 100644
index 000000000..a63677ef2
--- /dev/null
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_vote.cpp
@@ -0,0 +1,58 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "shader_recompiler/backend/spirv/emit_spirv.h"
+
+namespace Shader::Backend::SPIRV {
+namespace {
+Id LargeWarpBallot(EmitContext& ctx, Id ballot) {
+    const Id shift{ctx.Constant(ctx.U32[1], 5)};
+    const Id local_index{ctx.OpLoad(ctx.U32[1], ctx.subgroup_local_invocation_id)};
+    return ctx.OpVectorExtractDynamic(ctx.U32[1], ballot, local_index);
+}
+} // Anonymous namespace
+
+Id EmitVoteAll(EmitContext& ctx, Id pred) {
+    if (!ctx.profile.warp_size_potentially_larger_than_guest) {
+        return ctx.OpSubgroupAllKHR(ctx.U1, pred);
+    }
+    const Id mask_ballot{ctx.OpSubgroupBallotKHR(ctx.U32[4], ctx.true_value)};
+    const Id active_mask{LargeWarpBallot(ctx, mask_ballot)};
+    const Id ballot{LargeWarpBallot(ctx, ctx.OpSubgroupBallotKHR(ctx.U32[4], pred))};
+    const Id lhs{ctx.OpBitwiseAnd(ctx.U32[1], ballot, active_mask)};
+    return ctx.OpIEqual(ctx.U1, lhs, active_mask);
+}
+
+Id EmitVoteAny(EmitContext& ctx, Id pred) {
+    if (!ctx.profile.warp_size_potentially_larger_than_guest) {
+        return ctx.OpSubgroupAnyKHR(ctx.U1, pred);
+    }
+    const Id mask_ballot{ctx.OpSubgroupBallotKHR(ctx.U32[4], ctx.true_value)};
+    const Id active_mask{LargeWarpBallot(ctx, mask_ballot)};
+    const Id ballot{LargeWarpBallot(ctx, ctx.OpSubgroupBallotKHR(ctx.U32[4], pred))};
+    const Id lhs{ctx.OpBitwiseAnd(ctx.U32[1], ballot, active_mask)};
+    return ctx.OpINotEqual(ctx.U1, lhs, ctx.u32_zero_value);
+}
+
+Id EmitVoteEqual(EmitContext& ctx, Id pred) {
+    if (!ctx.profile.warp_size_potentially_larger_than_guest) {
+        return ctx.OpSubgroupAllEqualKHR(ctx.U1, pred);
+    }
+    const Id mask_ballot{ctx.OpSubgroupBallotKHR(ctx.U32[4], ctx.true_value)};
+    const Id active_mask{LargeWarpBallot(ctx, mask_ballot)};
+    const Id ballot{LargeWarpBallot(ctx, ctx.OpSubgroupBallotKHR(ctx.U32[4], pred))};
+    const Id lhs{ctx.OpBitwiseXor(ctx.U32[1], ballot, active_mask)};
+    return ctx.OpLogicalOr(ctx.U1, ctx.OpIEqual(ctx.U1, lhs, ctx.u32_zero_value),
+                           ctx.OpIEqual(ctx.U1, lhs, active_mask));
+}
+
+Id EmitSubgroupBallot(EmitContext& ctx, Id pred) {
+    const Id ballot{ctx.OpSubgroupBallotKHR(ctx.U32[4], pred)};
+    if (!ctx.profile.warp_size_potentially_larger_than_guest) {
+        return ctx.OpCompositeExtract(ctx.U32[1], ballot, 0U);
+    }
+    return LargeWarpBallot(ctx, ballot);
+}
+
+} // namespace Shader::Backend::SPIRV