mirror of
https://github.com/PabloMK7/citra
synced 2024-11-15 05:08:23 +00:00
gl_shader_decompiler: Make use of fmt with the decompiler
Allows us to avoid even more string churn by allowing the AddLine function to make use of fmt formatting so the string is formatted all at once instead of concatenating multiple strings. This is similar to how yuzu's decompiler works, which I've made function the same way in the past.
This commit is contained in:
Lioncash
parent
db5b8b9c88
commit
016d43df98
1 changed files with 125 additions and 102 deletions
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@ -8,6 +8,7 @@
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#include <string>
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#include <tuple>
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#include <utility>
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#include <fmt/format.h>
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#include <nihstro/shader_bytecode.h>
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#include "common/assert.h"
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#include "common/common_types.h"
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@ -196,12 +197,19 @@ private:
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class ShaderWriter {
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public:
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void AddLine(std::string_view text) {
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// Forwards all arguments directly to libfmt.
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// Note that all formatting requirements for fmt must be
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// obeyed when using this function. (e.g. {{ must be used
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// printing the character '{' is desirable. Ditto for }} and '}',
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// etc).
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template <typename... Args>
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void AddLine(std::string_view text, Args&&... args) {
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AddExpression(fmt::format(text, std::forward<Args>(args)...));
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AddNewLine();
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}
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void AddNewLine() {
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DEBUG_ASSERT(scope >= 0);
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if (!text.empty()) {
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shader_source.append(static_cast<std::size_t>(scope) * 4, ' ');
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}
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shader_source += text;
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shader_source += '\n';
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}
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@ -212,6 +220,13 @@ public:
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int scope = 0;
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private:
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void AddExpression(std::string_view text) {
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if (!text.empty()) {
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shader_source.append(static_cast<std::size_t>(scope) * 4, ' ');
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}
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shader_source += text;
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}
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std::string shader_source;
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};
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@ -222,16 +237,16 @@ std::string GetSelectorSrc(const SwizzlePattern& pattern) {
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for (std::size_t i = 0; i < 4; ++i) {
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switch ((pattern.*getter)(i)) {
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case SwizzlePattern::Selector::x:
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out += "x";
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out += 'x';
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break;
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case SwizzlePattern::Selector::y:
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out += "y";
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out += 'y';
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break;
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case SwizzlePattern::Selector::z:
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out += "z";
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out += 'z';
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break;
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case SwizzlePattern::Selector::w:
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out += "w";
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out += 'w';
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break;
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default:
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UNREACHABLE();
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@ -275,28 +290,28 @@ private:
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static std::string EvaluateCondition(Instruction::FlowControlType flow_control) {
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using Op = Instruction::FlowControlType::Op;
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std::string result_x =
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const std::string_view result_x =
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flow_control.refx.Value() ? "conditional_code.x" : "!conditional_code.x";
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std::string result_y =
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const std::string_view result_y =
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flow_control.refy.Value() ? "conditional_code.y" : "!conditional_code.y";
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switch (flow_control.op) {
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case Op::JustX:
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return result_x;
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return std::string(result_x);
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case Op::JustY:
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return result_y;
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return std::string(result_y);
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case Op::Or:
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case Op::And: {
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std::string and_or = flow_control.op == Op::Or ? "any" : "all";
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const std::string_view and_or = flow_control.op == Op::Or ? "any" : "all";
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std::string bvec;
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if (flow_control.refx.Value() && flow_control.refy.Value()) {
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bvec = "conditional_code";
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} else if (!flow_control.refx.Value() && !flow_control.refy.Value()) {
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bvec = "not(conditional_code)";
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} else {
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bvec = "bvec2(" + result_x + ", " + result_y + ")";
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bvec = fmt::format("bvec2({}, {})", result_x, result_y);
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}
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return and_or + "(" + bvec + ")";
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return fmt::format("{}({})", and_or, bvec);
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}
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default:
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UNREACHABLE();
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@ -307,20 +322,19 @@ private:
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/// Generates code representing a source register.
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std::string GetSourceRegister(const SourceRegister& source_reg,
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u32 address_register_index) const {
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u32 index = static_cast<u32>(source_reg.GetIndex());
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std::string index_str = std::to_string(index);
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const u32 index = static_cast<u32>(source_reg.GetIndex());
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switch (source_reg.GetRegisterType()) {
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case RegisterType::Input:
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return inputreg_getter(index);
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case RegisterType::Temporary:
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return "reg_tmp" + index_str;
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return fmt::format("reg_tmp{}", index);
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case RegisterType::FloatUniform:
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if (address_register_index != 0) {
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index_str +=
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std::string(" + address_registers.") + "xyz"[address_register_index - 1];
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return fmt::format("uniforms.f[{} + address_registers.{}]", index,
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"xyz"[address_register_index - 1]);
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}
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return "uniforms.f[" + index_str + "]";
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return fmt::format("uniforms.f[{}]", index);
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default:
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UNREACHABLE();
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return "";
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@ -329,13 +343,13 @@ private:
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/// Generates code representing a destination register.
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std::string GetDestRegister(const DestRegister& dest_reg) const {
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u32 index = static_cast<u32>(dest_reg.GetIndex());
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const u32 index = static_cast<u32>(dest_reg.GetIndex());
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switch (dest_reg.GetRegisterType()) {
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case RegisterType::Output:
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return outputreg_getter(index);
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case RegisterType::Temporary:
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return "reg_tmp" + std::to_string(index);
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return fmt::format("reg_tmp{}", index);
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default:
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UNREACHABLE();
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return "";
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@ -344,7 +358,7 @@ private:
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/// Generates code representing a bool uniform
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std::string GetUniformBool(u32 index) const {
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return "uniforms.b[" + std::to_string(index) + "]";
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return fmt::format("uniforms.b[{}]", index);
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}
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/**
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@ -353,12 +367,12 @@ private:
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*/
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void CallSubroutine(const Subroutine& subroutine) {
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if (subroutine.exit_method == ExitMethod::AlwaysEnd) {
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shader.AddLine(subroutine.GetName() + "();");
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shader.AddLine("{}();", subroutine.GetName());
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shader.AddLine("return true;");
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} else if (subroutine.exit_method == ExitMethod::Conditional) {
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shader.AddLine("if (" + subroutine.GetName() + "()) { return true; }");
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shader.AddLine("if ({}()) {{ return true; }}", subroutine.GetName());
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} else {
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shader.AddLine(subroutine.GetName() + "();");
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shader.AddLine("{}();", subroutine.GetName());
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}
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}
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@ -370,7 +384,7 @@ private:
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* @param dest_num_components number of components of the destination register.
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* @param value_num_components number of components of the value to assign.
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*/
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void SetDest(const SwizzlePattern& swizzle, const std::string& reg, const std::string& value,
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void SetDest(const SwizzlePattern& swizzle, std::string_view reg, std::string_view value,
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u32 dest_num_components, u32 value_num_components) {
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u32 dest_mask_num_components = 0;
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std::string dest_mask_swizzle = ".";
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@ -387,18 +401,19 @@ private:
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}
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DEBUG_ASSERT(value_num_components >= dest_num_components || value_num_components == 1);
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std::string dest = reg + (dest_num_components != 1 ? dest_mask_swizzle : "");
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const std::string dest =
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fmt::format("{}{}", reg, dest_num_components != 1 ? dest_mask_swizzle : "");
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std::string src = value;
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std::string src{value};
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if (value_num_components == 1) {
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if (dest_mask_num_components != 1) {
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src = "vec" + std::to_string(dest_mask_num_components) + "(" + value + ")";
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src = fmt::format("vec{}({})", dest_mask_num_components, value);
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}
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} else if (value_num_components != dest_mask_num_components) {
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src = "(" + value + ")" + dest_mask_swizzle;
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src = fmt::format("({}){}", value, dest_mask_swizzle);
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}
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shader.AddLine(dest + " = " + src + ";");
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shader.AddLine("{} = {};", dest, src);
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}
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/**
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@ -417,7 +432,7 @@ private:
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: instr.common.operand_desc_id;
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const SwizzlePattern swizzle = {swizzle_data[swizzle_offset]};
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shader.AddLine("// " + std::to_string(offset) + ": " + instr.opcode.Value().GetInfo().name);
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shader.AddLine("// {}: {}", offset, instr.opcode.Value().GetInfo().name);
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switch (instr.opcode.Value().GetInfo().type) {
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case OpCode::Type::Arithmetic: {
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@ -438,31 +453,32 @@ private:
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switch (instr.opcode.Value().EffectiveOpCode()) {
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case OpCode::Id::ADD: {
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SetDest(swizzle, dest_reg, src1 + " + " + src2, 4, 4);
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SetDest(swizzle, dest_reg, fmt::format("{} + {}", src1, src2), 4, 4);
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break;
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}
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case OpCode::Id::MUL: {
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if (sanitize_mul) {
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SetDest(swizzle, dest_reg, "sanitize_mul(" + src1 + ", " + src2 + ")", 4, 4);
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SetDest(swizzle, dest_reg, fmt::format("sanitize_mul({}, {})", src1, src2), 4,
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4);
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} else {
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SetDest(swizzle, dest_reg, src1 + " * " + src2, 4, 4);
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SetDest(swizzle, dest_reg, fmt::format("{} * {}", src1, src2), 4, 4);
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}
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break;
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}
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case OpCode::Id::FLR: {
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SetDest(swizzle, dest_reg, "floor(" + src1 + ")", 4, 4);
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SetDest(swizzle, dest_reg, fmt::format("floor({})", src1), 4, 4);
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break;
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}
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case OpCode::Id::MAX: {
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SetDest(swizzle, dest_reg, "max(" + src1 + ", " + src2 + ")", 4, 4);
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SetDest(swizzle, dest_reg, fmt::format("max({}, {})", src1, src2), 4, 4);
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break;
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}
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case OpCode::Id::MIN: {
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SetDest(swizzle, dest_reg, "min(" + src1 + ", " + src2 + ")", 4, 4);
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SetDest(swizzle, dest_reg, fmt::format("min({}, {})", src1, src2), 4, 4);
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break;
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}
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@ -474,18 +490,20 @@ private:
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std::string dot;
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if (opcode == OpCode::Id::DP3) {
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if (sanitize_mul) {
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dot = "dot(vec3(sanitize_mul(" + src1 + ", " + src2 + ")), vec3(1.0))";
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dot = fmt::format("dot(vec3(sanitize_mul({}, {})), vec3(1.0))", src1, src2);
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} else {
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dot = "dot(vec3(" + src1 + "), vec3(" + src2 + "))";
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dot = fmt::format("dot(vec3({}), vec3({}))", src1, src2);
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}
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} else {
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std::string src1_ = (opcode == OpCode::Id::DPH || opcode == OpCode::Id::DPHI)
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? "vec4(" + src1 + ".xyz, 1.0)"
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: src1;
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if (sanitize_mul) {
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dot = "dot(sanitize_mul(" + src1_ + ", " + src2 + "), vec4(1.0))";
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const std::string src1_ =
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(opcode == OpCode::Id::DPH || opcode == OpCode::Id::DPHI)
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? fmt::format("vec4({}.xyz, 1.0)", src1)
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: std::move(src1);
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dot = fmt::format("dot(sanitize_mul({}, {}), vec4(1.0))", src1_, src2);
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} else {
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dot = "dot(" + src1 + ", " + src2 + ")";
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dot = fmt::format("dot({}, {})", src1, src2);
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}
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}
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@ -494,17 +512,17 @@ private:
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}
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case OpCode::Id::RCP: {
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SetDest(swizzle, dest_reg, "(1.0 / " + src1 + ".x)", 4, 1);
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SetDest(swizzle, dest_reg, fmt::format("(1.0 / {}.x)", src1), 4, 1);
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break;
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}
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case OpCode::Id::RSQ: {
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SetDest(swizzle, dest_reg, "inversesqrt(" + src1 + ".x)", 4, 1);
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SetDest(swizzle, dest_reg, fmt::format("inversesqrt({}.x)", src1), 4, 1);
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break;
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}
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case OpCode::Id::MOVA: {
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SetDest(swizzle, "address_registers", "ivec2(" + src1 + ")", 2, 2);
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SetDest(swizzle, "address_registers", fmt::format("ivec2({})", src1), 2, 2);
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break;
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}
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@ -515,26 +533,27 @@ private:
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case OpCode::Id::SGE:
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case OpCode::Id::SGEI: {
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SetDest(swizzle, dest_reg, "vec4(greaterThanEqual(" + src1 + "," + src2 + "))", 4,
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4);
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SetDest(swizzle, dest_reg,
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fmt::format("vec4(greaterThanEqual({}, {}))", src1, src2), 4, 4);
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break;
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}
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case OpCode::Id::SLT:
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case OpCode::Id::SLTI: {
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SetDest(swizzle, dest_reg, "vec4(lessThan(" + src1 + "," + src2 + "))", 4, 4);
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SetDest(swizzle, dest_reg, fmt::format("vec4(lessThan({}, {}))", src1, src2), 4, 4);
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break;
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}
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case OpCode::Id::CMP: {
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using CompareOp = Instruction::Common::CompareOpType::Op;
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const std::map<CompareOp, std::pair<std::string, std::string>> cmp_ops{
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const std::map<CompareOp, std::pair<std::string_view, std::string_view>> cmp_ops{
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{CompareOp::Equal, {"==", "equal"}},
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{CompareOp::NotEqual, {"!=", "notEqual"}},
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{CompareOp::LessThan, {"<", "lessThan"}},
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{CompareOp::LessEqual, {"<=", "lessThanEqual"}},
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{CompareOp::GreaterThan, {">", "greaterThan"}},
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{CompareOp::GreaterEqual, {">=", "greaterThanEqual"}}};
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{CompareOp::GreaterEqual, {">=", "greaterThanEqual"}},
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};
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const CompareOp op_x = instr.common.compare_op.x.Value();
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const CompareOp op_y = instr.common.compare_op.y.Value();
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@ -544,24 +563,24 @@ private:
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} else if (cmp_ops.find(op_y) == cmp_ops.end()) {
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LOG_ERROR(HW_GPU, "Unknown compare mode {:x}", static_cast<int>(op_y));
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} else if (op_x != op_y) {
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shader.AddLine("conditional_code.x = " + src1 + ".x " +
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cmp_ops.find(op_x)->second.first + " " + src2 + ".x;");
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shader.AddLine("conditional_code.y = " + src1 + ".y " +
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cmp_ops.find(op_y)->second.first + " " + src2 + ".y;");
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shader.AddLine("conditional_code.x = {}.x {} {}.x;", src1,
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cmp_ops.find(op_x)->second.first, src2);
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shader.AddLine("conditional_code.y = {}.y {} {}.y;", src1,
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cmp_ops.find(op_y)->second.first, src2);
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} else {
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shader.AddLine("conditional_code = " + cmp_ops.find(op_x)->second.second +
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"(vec2(" + src1 + "), vec2(" + src2 + "));");
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shader.AddLine("conditional_code = {}(vec2({}), vec2({}));",
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cmp_ops.find(op_x)->second.second, src1, src2);
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}
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break;
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}
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case OpCode::Id::EX2: {
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SetDest(swizzle, dest_reg, "exp2(" + src1 + ".x)", 4, 1);
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SetDest(swizzle, dest_reg, fmt::format("exp2({}.x)", src1), 4, 1);
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break;
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}
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case OpCode::Id::LG2: {
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SetDest(swizzle, dest_reg, "log2(" + src1 + ".x)", 4, 1);
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SetDest(swizzle, dest_reg, fmt::format("log2({}.x)", src1), 4, 1);
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break;
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}
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@ -604,10 +623,10 @@ private:
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: "";
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if (sanitize_mul) {
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SetDest(swizzle, dest_reg, "sanitize_mul(" + src1 + ", " + src2 + ") + " + src3,
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4, 4);
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SetDest(swizzle, dest_reg,
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fmt::format("sanitize_mul({}, {}) + {}", src1, src2, src3), 4, 4);
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} else {
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SetDest(swizzle, dest_reg, src1 + " * " + src2 + " + " + src3, 4, 4);
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SetDest(swizzle, dest_reg, fmt::format("{} * {} + {}", src1, src2, src3), 4, 4);
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}
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} else {
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LOG_ERROR(HW_GPU, "Unhandled multiply-add instruction: 0x{:02x} ({}): 0x{:08x}",
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@ -637,13 +656,13 @@ private:
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GetUniformBool(instr.flow_control.bool_uniform_id);
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}
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shader.AddLine("if (" + condition + ") {");
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shader.AddLine("if ({}) {{", condition);
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++shader.scope;
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shader.AddLine("{ jmp_to = " + std::to_string(instr.flow_control.dest_offset) +
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"u; break; }");
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shader.AddLine("{{ jmp_to = {}u; break; }}",
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instr.flow_control.dest_offset.Value());
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--shader.scope;
|
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shader.AddLine("}");
|
||||
shader.AddLine("}}");
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
@ -657,7 +676,11 @@ private:
|
|||
condition = GetUniformBool(instr.flow_control.bool_uniform_id);
|
||||
}
|
||||
|
||||
shader.AddLine(condition.empty() ? "{" : "if (" + condition + ") {");
|
||||
if (condition.empty()) {
|
||||
shader.AddLine("{{");
|
||||
} else {
|
||||
shader.AddLine("if ({}) {{", condition);
|
||||
}
|
||||
++shader.scope;
|
||||
|
||||
auto& call_sub = GetSubroutine(instr.flow_control.dest_offset,
|
||||
|
|
@ -671,7 +694,7 @@ private:
|
|||
}
|
||||
|
||||
--shader.scope;
|
||||
shader.AddLine("}");
|
||||
shader.AddLine("}}");
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
@ -693,7 +716,7 @@ private:
|
|||
const u32 endif_offset =
|
||||
instr.flow_control.dest_offset + instr.flow_control.num_instructions;
|
||||
|
||||
shader.AddLine("if (" + condition + ") {");
|
||||
shader.AddLine("if ({}) {{", condition);
|
||||
++shader.scope;
|
||||
|
||||
auto& if_sub = GetSubroutine(if_offset, else_offset);
|
||||
|
|
@ -702,7 +725,7 @@ private:
|
|||
|
||||
if (instr.flow_control.num_instructions != 0) {
|
||||
--shader.scope;
|
||||
shader.AddLine("} else {");
|
||||
shader.AddLine("}} else {{");
|
||||
++shader.scope;
|
||||
|
||||
auto& else_sub = GetSubroutine(else_offset, endif_offset);
|
||||
|
|
@ -716,20 +739,20 @@ private:
|
|||
}
|
||||
|
||||
--shader.scope;
|
||||
shader.AddLine("}");
|
||||
shader.AddLine("}}");
|
||||
break;
|
||||
}
|
||||
|
||||
case OpCode::Id::LOOP: {
|
||||
std::string int_uniform =
|
||||
"uniforms.i[" + std::to_string(instr.flow_control.int_uniform_id) + "]";
|
||||
const std::string int_uniform =
|
||||
fmt::format("uniforms.i[{}]", instr.flow_control.int_uniform_id.Value());
|
||||
|
||||
shader.AddLine("address_registers.z = int(" + int_uniform + ".y);");
|
||||
shader.AddLine("address_registers.z = int({}.y);", int_uniform);
|
||||
|
||||
std::string loop_var = "loop" + std::to_string(offset);
|
||||
shader.AddLine("for (uint " + loop_var + " = 0u; " + loop_var +
|
||||
" <= " + int_uniform + ".x; address_registers.z += int(" +
|
||||
int_uniform + ".z), ++" + loop_var + ") {");
|
||||
const std::string loop_var = fmt::format("loop{}", offset);
|
||||
shader.AddLine(
|
||||
"for (uint {} = 0u; {} <= {}.x; address_registers.z += int({}.z), ++{}) {{",
|
||||
loop_var, loop_var, int_uniform, int_uniform, loop_var);
|
||||
++shader.scope;
|
||||
|
||||
auto& loop_sub = GetSubroutine(offset + 1, instr.flow_control.dest_offset + 1);
|
||||
|
|
@ -737,7 +760,7 @@ private:
|
|||
offset = instr.flow_control.dest_offset;
|
||||
|
||||
--shader.scope;
|
||||
shader.AddLine("}");
|
||||
shader.AddLine("}}");
|
||||
|
||||
if (loop_sub.exit_method == ExitMethod::AlwaysEnd) {
|
||||
offset = PROGRAM_END - 1;
|
||||
|
|
@ -782,41 +805,41 @@ private:
|
|||
|
||||
void Generate() {
|
||||
if (sanitize_mul) {
|
||||
shader.AddLine("vec4 sanitize_mul(vec4 lhs, vec4 rhs) {");
|
||||
shader.AddLine("vec4 sanitize_mul(vec4 lhs, vec4 rhs) {{");
|
||||
++shader.scope;
|
||||
shader.AddLine("vec4 product = lhs * rhs;");
|
||||
shader.AddLine("return mix(product, mix(mix(vec4(0.0), product, isnan(rhs)), product, "
|
||||
"isnan(lhs)), isnan(product));");
|
||||
--shader.scope;
|
||||
shader.AddLine("}\n");
|
||||
shader.AddLine("}}\n");
|
||||
}
|
||||
|
||||
// Add declarations for registers
|
||||
shader.AddLine("bvec2 conditional_code = bvec2(false);");
|
||||
shader.AddLine("ivec3 address_registers = ivec3(0);");
|
||||
for (int i = 0; i < 16; ++i) {
|
||||
shader.AddLine("vec4 reg_tmp" + std::to_string(i) + " = vec4(0.0, 0.0, 0.0, 1.0);");
|
||||
shader.AddLine("vec4 reg_tmp{} = vec4(0.0, 0.0, 0.0, 1.0);", i);
|
||||
}
|
||||
shader.AddLine("");
|
||||
shader.AddNewLine();
|
||||
|
||||
// Add declarations for all subroutines
|
||||
for (const auto& subroutine : subroutines) {
|
||||
shader.AddLine("bool " + subroutine.GetName() + "();");
|
||||
shader.AddLine("bool {}();", subroutine.GetName());
|
||||
}
|
||||
shader.AddLine("");
|
||||
shader.AddNewLine();
|
||||
|
||||
// Add the main entry point
|
||||
shader.AddLine("bool exec_shader() {");
|
||||
shader.AddLine("bool exec_shader() {{");
|
||||
++shader.scope;
|
||||
CallSubroutine(GetSubroutine(main_offset, PROGRAM_END));
|
||||
--shader.scope;
|
||||
shader.AddLine("}\n");
|
||||
shader.AddLine("}}\n");
|
||||
|
||||
// Add definitions for all subroutines
|
||||
for (const auto& subroutine : subroutines) {
|
||||
std::set<u32> labels = subroutine.labels;
|
||||
|
||||
shader.AddLine("bool " + subroutine.GetName() + "() {");
|
||||
shader.AddLine("bool {}() {{", subroutine.GetName());
|
||||
++shader.scope;
|
||||
|
||||
if (labels.empty()) {
|
||||
|
|
@ -825,14 +848,14 @@ private:
|
|||
}
|
||||
} else {
|
||||
labels.insert(subroutine.begin);
|
||||
shader.AddLine("uint jmp_to = " + std::to_string(subroutine.begin) + "u;");
|
||||
shader.AddLine("while (true) {");
|
||||
shader.AddLine("uint jmp_to = {}u;", subroutine.begin);
|
||||
shader.AddLine("while (true) {{");
|
||||
++shader.scope;
|
||||
|
||||
shader.AddLine("switch (jmp_to) {");
|
||||
shader.AddLine("switch (jmp_to) {{");
|
||||
|
||||
for (auto label : labels) {
|
||||
shader.AddLine("case " + std::to_string(label) + "u: {");
|
||||
shader.AddLine("case {}u: {{", label);
|
||||
++shader.scope;
|
||||
|
||||
auto next_it = labels.lower_bound(label + 1);
|
||||
|
|
@ -841,25 +864,25 @@ private:
|
|||
u32 compile_end = CompileRange(label, next_label);
|
||||
if (compile_end > next_label && compile_end != PROGRAM_END) {
|
||||
// This happens only when there is a label inside a IF/LOOP block
|
||||
shader.AddLine("{ jmp_to = " + std::to_string(compile_end) + "u; break; }");
|
||||
shader.AddLine("{{ jmp_to = {}u; break; }}", compile_end);
|
||||
labels.emplace(compile_end);
|
||||
}
|
||||
|
||||
--shader.scope;
|
||||
shader.AddLine("}");
|
||||
shader.AddLine("}}");
|
||||
}
|
||||
|
||||
shader.AddLine("default: return false;");
|
||||
shader.AddLine("}");
|
||||
shader.AddLine("}}");
|
||||
|
||||
--shader.scope;
|
||||
shader.AddLine("}");
|
||||
shader.AddLine("}}");
|
||||
|
||||
shader.AddLine("return false;");
|
||||
}
|
||||
|
||||
--shader.scope;
|
||||
shader.AddLine("}\n");
|
||||
shader.AddLine("}}\n");
|
||||
|
||||
DEBUG_ASSERT(shader.scope == 0);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue