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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#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
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