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-rw-r--r--src/video_core/renderer_opengl/gl_shader_decompiler.cpp102
1 files changed, 58 insertions, 44 deletions
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
index e5e87221b..3411cf9e6 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -112,20 +112,20 @@ static std::string GetTopologyName(Tegra::Shader::OutputTopology topology) {
static bool IsPrecise(Operation operand) {
const auto& meta = operand.GetMeta();
- if (std::holds_alternative<MetaArithmetic>(meta)) {
- return std::get<MetaArithmetic>(meta).precise;
+ if (const auto arithmetic = std::get_if<MetaArithmetic>(&meta)) {
+ return arithmetic->precise;
}
- if (std::holds_alternative<MetaHalfArithmetic>(meta)) {
- return std::get<MetaHalfArithmetic>(meta).precise;
+ if (const auto half_arithmetic = std::get_if<MetaHalfArithmetic>(&meta)) {
+ return half_arithmetic->precise;
}
return false;
}
static bool IsPrecise(Node node) {
- if (!std::holds_alternative<OperationNode>(*node)) {
- return false;
+ if (const auto operation = std::get_if<OperationNode>(node)) {
+ return IsPrecise(*operation);
}
- return IsPrecise(std::get<OperationNode>(*node));
+ return false;
}
class GLSLDecompiler final {
@@ -601,12 +601,12 @@ private:
case Type::Uint:
return "ftou(" + value + ')';
case Type::HalfFloat:
- if (!std::holds_alternative<MetaHalfArithmetic>(operation.GetMeta())) {
+ const auto half_meta = std::get_if<MetaHalfArithmetic>(&operation.GetMeta());
+ if (!half_meta) {
value = "toHalf2(" + value + ')';
}
- const auto& half_meta = std::get<MetaHalfArithmetic>(operation.GetMeta());
- switch (half_meta.types.at(operand_index)) {
+ switch (half_meta->types.at(operand_index)) {
case Tegra::Shader::HalfType::H0_H1:
return "toHalf2(" + value + ')';
case Tegra::Shader::HalfType::F32:
@@ -692,19 +692,20 @@ private:
bool is_extra_int = false) {
constexpr std::array<const char*, 4> coord_constructors = {"float", "vec2", "vec3", "vec4"};
- const auto& meta = std::get<MetaTexture>(operation.GetMeta());
+ const auto meta = std::get_if<MetaTexture>(&operation.GetMeta());
const auto count = static_cast<u32>(operation.GetOperandsCount());
+ ASSERT(meta);
std::string expr = func;
expr += '(';
- expr += GetSampler(meta.sampler);
+ expr += GetSampler(meta->sampler);
expr += ", ";
- expr += coord_constructors[meta.coords_count - 1];
+ expr += coord_constructors[meta->coords_count - 1];
expr += '(';
for (u32 i = 0; i < count; ++i) {
- const bool is_extra = i >= meta.coords_count;
- const bool is_array = i == meta.array_index;
+ const bool is_extra = i >= meta->coords_count;
+ const bool is_array = i == meta->array_index;
std::string operand = [&]() {
if (is_extra && is_extra_int) {
@@ -724,7 +725,7 @@ private:
expr += operand;
- if (i + 1 == meta.coords_count) {
+ if (i + 1 == meta->coords_count) {
expr += ')';
}
if (i + 1 < count) {
@@ -1108,38 +1109,46 @@ private:
}
std::string F4Texture(Operation operation) {
- const auto meta = std::get<MetaTexture>(operation.GetMeta());
+ const auto meta = std::get_if<MetaTexture>(&operation.GetMeta());
+ ASSERT(meta);
+
std::string expr = GenerateTexture(operation, "texture");
- if (meta.sampler.IsShadow()) {
+ if (meta->sampler.IsShadow()) {
expr = "vec4(" + expr + ')';
}
- return expr + GetSwizzle(meta.element);
+ return expr + GetSwizzle(meta->element);
}
std::string F4TextureLod(Operation operation) {
- const auto meta = std::get<MetaTexture>(operation.GetMeta());
+ const auto meta = std::get_if<MetaTexture>(&operation.GetMeta());
+ ASSERT(meta);
+
std::string expr = GenerateTexture(operation, "textureLod");
- if (meta.sampler.IsShadow()) {
+ if (meta->sampler.IsShadow()) {
expr = "vec4(" + expr + ')';
}
- return expr + GetSwizzle(meta.element);
+ return expr + GetSwizzle(meta->element);
}
std::string F4TextureGather(Operation operation) {
- const auto meta = std::get<MetaTexture>(operation.GetMeta());
- return GenerateTexture(operation, "textureGather", !meta.sampler.IsShadow()) +
- GetSwizzle(meta.element);
+ const auto meta = std::get_if<MetaTexture>(&operation.GetMeta());
+ ASSERT(meta);
+
+ return GenerateTexture(operation, "textureGather", !meta->sampler.IsShadow()) +
+ GetSwizzle(meta->element);
}
std::string F4TextureQueryDimensions(Operation operation) {
- const auto& meta = std::get<MetaTexture>(operation.GetMeta());
- const std::string sampler = GetSampler(meta.sampler);
+ const auto meta = std::get_if<MetaTexture>(&operation.GetMeta());
+ ASSERT(meta);
+
+ const std::string sampler = GetSampler(meta->sampler);
const std::string lod = VisitOperand(operation, 0, Type::Int);
- switch (meta.element) {
+ switch (meta->element) {
case 0:
case 1:
- return "textureSize(" + sampler + ", " + lod + ')' + GetSwizzle(meta.element);
+ return "textureSize(" + sampler + ", " + lod + ')' + GetSwizzle(meta->element);
case 2:
return "0";
case 3:
@@ -1150,29 +1159,32 @@ private:
}
std::string F4TextureQueryLod(Operation operation) {
- const auto& meta = std::get<MetaTexture>(operation.GetMeta());
- if (meta.element < 2) {
+ const auto meta = std::get_if<MetaTexture>(&operation.GetMeta());
+ ASSERT(meta);
+
+ if (meta->element < 2) {
return "itof(int((" + GenerateTexture(operation, "textureQueryLod") + " * vec2(256))" +
- GetSwizzle(meta.element) + "))";
+ GetSwizzle(meta->element) + "))";
}
return "0";
}
std::string F4TexelFetch(Operation operation) {
constexpr std::array<const char*, 4> constructors = {"int", "ivec2", "ivec3", "ivec4"};
- const auto& meta = std::get<MetaTexture>(operation.GetMeta());
+ const auto meta = std::get_if<MetaTexture>(&operation.GetMeta());
const auto count = static_cast<u32>(operation.GetOperandsCount());
+ ASSERT(meta);
std::string expr = "texelFetch(";
- expr += GetSampler(meta.sampler);
+ expr += GetSampler(meta->sampler);
expr += ", ";
- expr += constructors[meta.coords_count - 1];
+ expr += constructors[meta->coords_count - 1];
expr += '(';
for (u32 i = 0; i < count; ++i) {
expr += VisitOperand(operation, i, Type::Int);
- if (i + 1 == meta.coords_count) {
+ if (i + 1 == meta->coords_count) {
expr += ')';
}
if (i + 1 < count) {
@@ -1180,26 +1192,28 @@ private:
}
}
expr += ')';
- return expr + GetSwizzle(meta.element);
+ return expr + GetSwizzle(meta->element);
}
std::string Branch(Operation operation) {
- const auto target = std::get<ImmediateNode>(*operation[0]);
- code.AddLine(fmt::format("jmp_to = 0x{:x}u;", target.GetValue()));
+ const auto target = std::get_if<ImmediateNode>(operation[0]);
+ UNIMPLEMENTED_IF(!target);
+
+ code.AddLine(fmt::format("jmp_to = 0x{:x}u;", target->GetValue()));
code.AddLine("break;");
return {};
}
std::string PushFlowStack(Operation operation) {
- const auto target = std::get<ImmediateNode>(*operation[0]);
- code.AddLine(fmt::format("flow_stack[flow_stack_top] = 0x{:x}u;", target.GetValue()));
- code.AddLine("flow_stack_top++;");
+ const auto target = std::get_if<ImmediateNode>(operation[0]);
+ UNIMPLEMENTED_IF(!target);
+
+ code.AddLine(fmt::format("flow_stack[flow_stack_top++] = 0x{:x}u;", target->GetValue()));
return {};
}
std::string PopFlowStack(Operation operation) {
- code.AddLine("flow_stack_top--;");
- code.AddLine("jmp_to = flow_stack[flow_stack_top];");
+ code.AddLine("jmp_to = flow_stack[--flow_stack_top];");
code.AddLine("break;");
return {};
}