eden-emu/eden
14
3
Fork 4
Code Issues 3 Pull requests 4 Projects Releases 2 Packages Wiki Activity Actions 2

glsl: implement phi nodes

Browse source
This commit is contained in:
ameerj 2021-05-24 19:33:11 -04:00
parent 659eecb295
commit 3d950a8d18
4 changed files with 54 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

48
src/shader_recompiler/backend/glsl/emit_glsl.cpp
View file

@ -2,6 +2,7 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <ranges>
#include <string>
#include <tuple>
@ -9,6 +10,7 @@
#include "shader_recompiler/backend/glsl/emit_context.h"
#include "shader_recompiler/backend/glsl/emit_glsl.h"
#include "shader_recompiler/backend/glsl/emit_glsl_instructions.h"
#include "shader_recompiler/frontend/ir/ir_emitter.h"
#include "shader_recompiler/frontend/ir/program.h"
#include "shader_recompiler/profile.h"
@ -96,6 +98,22 @@ void EmitInst(EmitContext& ctx, IR::Inst* inst) {
throw LogicError("Invalid opcode {}", inst->GetOpcode());
}
void Precolor(EmitContext& ctx, const IR::Program& program) {
for (IR::Block* const block : program.blocks) {
for (IR::Inst& phi : block->Instructions() | std::views::take_while(IR::IsPhi)) {
ctx.Add("{};", ctx.reg_alloc.Define(phi, phi.Arg(0).Type()));
const size_t num_args{phi.NumArgs()};
for (size_t i = 0; i < num_args; ++i) {
IR::IREmitter{*phi.PhiBlock(i)}.PhiMove(phi, phi.Arg(i));
}
// Add reference to the phi node on the phi predecessor to avoid overwritting it
for (size_t i = 0; i < num_args; ++i) {
IR::IREmitter{*phi.PhiBlock(i)}.Reference(IR::Value{&phi});
}
}
}
}
void EmitCode(EmitContext& ctx, const IR::Program& program) {
for (const IR::AbstractSyntaxNode& node : program.syntax_list) {
switch (node.type) {
@ -105,37 +123,31 @@ void EmitCode(EmitContext& ctx, const IR::Program& program) {
}
break;
case IR::AbstractSyntaxNode::Type::If:
ctx.Add("if (");
ctx.Add("if ({}){{", ctx.reg_alloc.Consume(node.data.if_node.cond));
break;
case IR::AbstractSyntaxNode::Type::EndIf:
ctx.Add("){{");
break;
case IR::AbstractSyntaxNode::Type::Loop:
ctx.Add("while (");
break;
case IR::AbstractSyntaxNode::Type::Repeat:
if (node.data.repeat.cond.IsImmediate()) {
if (node.data.repeat.cond.U1()) {
ctx.Add("ENDREP;");
} else {
ctx.Add("BRK;"
"ENDREP;");
}
}
ctx.Add("}}");
break;
case IR::AbstractSyntaxNode::Type::Break:
if (node.data.break_node.cond.IsImmediate()) {
if (node.data.break_node.cond.U1()) {
ctx.Add("break;");
}
} else {
// TODO: implement this
ctx.Add("MOV.S.CC RC,{};"
"BRK (NE.x);",
0);
}
break;
case IR::AbstractSyntaxNode::Type::Return:
case IR::AbstractSyntaxNode::Type::Unreachable:
ctx.Add("return;");
ctx.Add("return;\n}}");
break;
case IR::AbstractSyntaxNode::Type::Loop:
case IR::AbstractSyntaxNode::Type::Repeat:
default:
ctx.Add("UNAHNDLED {}", node.type);
throw NotImplementedException("{}", node.type);
break;
}
}
@ -146,8 +158,8 @@ void EmitCode(EmitContext& ctx, const IR::Program& program) {
std::string EmitGLSL(const Profile& profile, const RuntimeInfo&, IR::Program& program,
Bindings& bindings) {
EmitContext ctx{program, bindings, profile};
Precolor(ctx, program);
EmitCode(ctx, program);
ctx.code += "}";
return ctx.code;
}