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-rw-r--r--src/shader_recompiler/backend/spirv/emit_context.cpp8
-rw-r--r--src/shader_recompiler/backend/spirv/emit_context.h2
-rw-r--r--src/shader_recompiler/backend/spirv/emit_spirv.h1
-rw-r--r--src/shader_recompiler/backend/spirv/emit_spirv_warp.cpp16
4 files changed, 27 insertions, 0 deletions
diff --git a/src/shader_recompiler/backend/spirv/emit_context.cpp b/src/shader_recompiler/backend/spirv/emit_context.cpp
index 96d0e9b4d..7531f8b21 100644
--- a/src/shader_recompiler/backend/spirv/emit_context.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_context.cpp
@@ -393,6 +393,14 @@ void EmitContext::DefineInputs(const Info& info) {
subgroup_local_invocation_id =
DefineInput(*this, U32[1], spv::BuiltIn::SubgroupLocalInvocationId);
}
+ if (info.uses_fswzadd) {
+ const Id f32_one{Constant(F32[1], 1.0f)};
+ const Id f32_minus_one{Constant(F32[1], -1.0f)};
+ const Id f32_zero{Constant(F32[1], 0.0f)};
+ fswzadd_lut_a = ConstantComposite(F32[4], f32_minus_one, f32_one, f32_minus_one, f32_zero);
+ fswzadd_lut_b =
+ ConstantComposite(F32[4], f32_minus_one, f32_minus_one, f32_one, f32_minus_one);
+ }
if (info.loads_position) {
const bool is_fragment{stage != Stage::Fragment};
const spv::BuiltIn built_in{is_fragment ? spv::BuiltIn::Position : spv::BuiltIn::FragCoord};
diff --git a/src/shader_recompiler/backend/spirv/emit_context.h b/src/shader_recompiler/backend/spirv/emit_context.h
index 1a4e8221a..ffac39c4f 100644
--- a/src/shader_recompiler/backend/spirv/emit_context.h
+++ b/src/shader_recompiler/backend/spirv/emit_context.h
@@ -103,6 +103,8 @@ public:
Id vertex_index{};
Id base_vertex{};
Id front_face{};
+ Id fswzadd_lut_a{};
+ Id fswzadd_lut_b{};
Id local_memory{};
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv.h b/src/shader_recompiler/backend/spirv/emit_spirv.h
index 02648d769..3d0c6f7ba 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv.h
+++ b/src/shader_recompiler/backend/spirv/emit_spirv.h
@@ -397,5 +397,6 @@ Id EmitShuffleDown(EmitContext& ctx, IR::Inst* inst, Id value, Id index, Id clam
Id segmentation_mask);
Id EmitShuffleButterfly(EmitContext& ctx, IR::Inst* inst, Id value, Id index, Id clamp,
Id segmentation_mask);
+Id EmitFSwizzleAdd(EmitContext& ctx, Id op_a, Id op_b, Id swizzle);
} // namespace Shader::Backend::SPIRV
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_warp.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_warp.cpp
index 44d8a347f..cbc5b1c96 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_warp.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_warp.cpp
@@ -132,4 +132,20 @@ Id EmitShuffleButterfly(EmitContext& ctx, IR::Inst* inst, Id value, Id index, Id
return SelectValue(ctx, in_range, value, src_thread_id);
}
+Id EmitFSwizzleAdd(EmitContext& ctx, Id op_a, Id op_b, Id swizzle) {
+ const Id three{ctx.Constant(ctx.U32[1], 3)};
+ Id mask{ctx.OpLoad(ctx.U32[1], ctx.subgroup_local_invocation_id)};
+ mask = ctx.OpBitwiseAnd(ctx.U32[1], mask, three);
+ mask = ctx.OpShiftLeftLogical(ctx.U32[1], mask, ctx.Constant(ctx.U32[1], 1));
+ mask = ctx.OpShiftRightLogical(ctx.U32[1], swizzle, mask);
+ mask = ctx.OpBitwiseAnd(ctx.U32[1], mask, three);
+
+ const Id modifier_a{ctx.OpVectorExtractDynamic(ctx.F32[1], ctx.fswzadd_lut_a, mask)};
+ const Id modifier_b{ctx.OpVectorExtractDynamic(ctx.F32[1], ctx.fswzadd_lut_b, mask)};
+
+ const Id result_a{ctx.OpFMul(ctx.F32[1], op_a, modifier_a)};
+ const Id result_b{ctx.OpFMul(ctx.F32[1], op_b, modifier_b)};
+ return ctx.OpFAdd(ctx.F32[1], result_a, result_b);
+}
+
} // namespace Shader::Backend::SPIRV