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shader: Implement VOTE
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18 changed files with 182 additions and 6 deletions
58
src/shader_recompiler/backend/spirv/emit_spirv_vote.cpp
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58
src/shader_recompiler/backend/spirv/emit_spirv_vote.cpp
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// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "shader_recompiler/backend/spirv/emit_spirv.h"
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namespace Shader::Backend::SPIRV {
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namespace {
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Id LargeWarpBallot(EmitContext& ctx, Id ballot) {
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const Id shift{ctx.Constant(ctx.U32[1], 5)};
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const Id local_index{ctx.OpLoad(ctx.U32[1], ctx.subgroup_local_invocation_id)};
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return ctx.OpVectorExtractDynamic(ctx.U32[1], ballot, local_index);
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}
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} // Anonymous namespace
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Id EmitVoteAll(EmitContext& ctx, Id pred) {
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if (!ctx.profile.warp_size_potentially_larger_than_guest) {
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return ctx.OpSubgroupAllKHR(ctx.U1, pred);
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}
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const Id mask_ballot{ctx.OpSubgroupBallotKHR(ctx.U32[4], ctx.true_value)};
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const Id active_mask{LargeWarpBallot(ctx, mask_ballot)};
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const Id ballot{LargeWarpBallot(ctx, ctx.OpSubgroupBallotKHR(ctx.U32[4], pred))};
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const Id lhs{ctx.OpBitwiseAnd(ctx.U32[1], ballot, active_mask)};
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return ctx.OpIEqual(ctx.U1, lhs, active_mask);
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}
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Id EmitVoteAny(EmitContext& ctx, Id pred) {
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if (!ctx.profile.warp_size_potentially_larger_than_guest) {
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return ctx.OpSubgroupAnyKHR(ctx.U1, pred);
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}
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const Id mask_ballot{ctx.OpSubgroupBallotKHR(ctx.U32[4], ctx.true_value)};
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const Id active_mask{LargeWarpBallot(ctx, mask_ballot)};
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const Id ballot{LargeWarpBallot(ctx, ctx.OpSubgroupBallotKHR(ctx.U32[4], pred))};
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const Id lhs{ctx.OpBitwiseAnd(ctx.U32[1], ballot, active_mask)};
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return ctx.OpINotEqual(ctx.U1, lhs, ctx.u32_zero_value);
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}
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Id EmitVoteEqual(EmitContext& ctx, Id pred) {
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if (!ctx.profile.warp_size_potentially_larger_than_guest) {
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return ctx.OpSubgroupAllEqualKHR(ctx.U1, pred);
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}
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const Id mask_ballot{ctx.OpSubgroupBallotKHR(ctx.U32[4], ctx.true_value)};
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const Id active_mask{LargeWarpBallot(ctx, mask_ballot)};
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const Id ballot{LargeWarpBallot(ctx, ctx.OpSubgroupBallotKHR(ctx.U32[4], pred))};
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const Id lhs{ctx.OpBitwiseXor(ctx.U32[1], ballot, active_mask)};
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return ctx.OpLogicalOr(ctx.U1, ctx.OpIEqual(ctx.U1, lhs, ctx.u32_zero_value),
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ctx.OpIEqual(ctx.U1, lhs, active_mask));
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}
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Id EmitSubgroupBallot(EmitContext& ctx, Id pred) {
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const Id ballot{ctx.OpSubgroupBallotKHR(ctx.U32[4], pred)};
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if (!ctx.profile.warp_size_potentially_larger_than_guest) {
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return ctx.OpCompositeExtract(ctx.U32[1], ballot, 0U);
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}
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return LargeWarpBallot(ctx, ballot);
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}
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} // namespace Shader::Backend::SPIRV
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