1 files changed, 95 insertions, 0 deletions

diff --git a/src/shader_recompiler/backend/glasm/emit_glasm_special.cpp b/src/shader_recompiler/backend/glasm/emit_glasm_special.cpp
index e69de29bb..e7a5fb13a 100644
--- a/src/shader_recompiler/backend/glasm/emit_glasm_special.cpp
+++ b/src/shader_recompiler/backend/glasm/emit_glasm_special.cpp
@@ -0,0 +1,95 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "shader_recompiler/backend/glasm/emit_glasm_instructions.h"
+#include "shader_recompiler/backend/glasm/glasm_emit_context.h"
+#include "shader_recompiler/frontend/ir/value.h"
+
+namespace Shader::Backend::GLASM {
+
+static void DefinePhi(EmitContext& ctx, IR::Inst& phi) {
+    switch (phi.Type()) {
+    case IR::Type::U1:
+    case IR::Type::U32:
+    case IR::Type::F32:
+        ctx.reg_alloc.Define(phi);
+        break;
+    case IR::Type::U64:
+    case IR::Type::F64:
+        ctx.reg_alloc.LongDefine(phi);
+        break;
+    default:
+        throw NotImplementedException("Phi node type {}", phi.Type());
+    }
+}
+
+void EmitPhi(EmitContext& ctx, IR::Inst& phi) {
+    const size_t num_args{phi.NumArgs()};
+    for (size_t i = 0; i < num_args; ++i) {
+        ctx.reg_alloc.Consume(phi.Arg(i));
+    }
+    if (!phi.Definition<Id>().is_valid) {
+        // The phi node wasn't forward defined
+        DefinePhi(ctx, phi);
+    }
+}
+
+void EmitVoid(EmitContext&) {}
+
+void EmitReference(EmitContext& ctx, const IR::Value& value) {
+    ctx.reg_alloc.Consume(value);
+}
+
+void EmitPhiMove(EmitContext& ctx, const IR::Value& phi_value, const IR::Value& value) {
+    IR::Inst& phi{RegAlloc::AliasInst(*phi_value.Inst())};
+    if (!phi.Definition<Id>().is_valid) {
+        // The phi node wasn't forward defined
+        DefinePhi(ctx, phi);
+    }
+    const Register phi_reg{ctx.reg_alloc.Consume(IR::Value{&phi})};
+    const Value eval_value{ctx.reg_alloc.Consume(value)};
+
+    if (phi_reg == eval_value) {
+        return;
+    }
+    switch (phi.Flags<IR::Type>()) {
+    case IR::Type::U1:
+    case IR::Type::U32:
+    case IR::Type::F32:
+        ctx.Add("MOV.S {}.x,{};", phi_reg, ScalarS32{eval_value});
+        break;
+    case IR::Type::U64:
+    case IR::Type::F64:
+        ctx.Add("MOV.U64 {}.x,{};", phi_reg, ScalarRegister{eval_value});
+        break;
+    default:
+        throw NotImplementedException("Phi node type {}", phi.Type());
+    }
+}
+
+void EmitPrologue(EmitContext&) {
+    // TODO
+}
+
+void EmitEpilogue(EmitContext&) {
+    // TODO
+}
+
+void EmitEmitVertex(EmitContext& ctx, ScalarS32 stream) {
+    if (stream.type == Type::U32 && stream.imm_u32 == 0) {
+        ctx.Add("EMIT;");
+    } else {
+        ctx.Add("EMITS {};", stream);
+    }
+}
+
+void EmitEndPrimitive(EmitContext& ctx, const IR::Value& stream) {
+    if (!stream.IsImmediate()) {
+        LOG_WARNING(Shader_GLASM, "Stream is not immediate");
+    }
+    ctx.reg_alloc.Consume(stream);
+    ctx.Add("ENDPRIM;");
+}
+
+} // namespace Shader::Backend::GLASM