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Code Issues Releases Activity

Shader Disassembly: Cleanup code and improve output alignment

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This commit is contained in:
Yuri Kunde Schlesner 2015-08-25 04:52:37 -03:00
parent f5a49df679
commit 9431ee330a
1 changed files with 79 additions and 66 deletions
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141
src/citra_qt/debugger/graphics_vertex_shader.cpp
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@ -65,6 +65,19 @@ QVariant GraphicsVertexShaderModel::headerData(int section, Qt::Orientation orie
return QVariant();
}
// e.g. "-c92[a0.x].xyzw"
static void print_input(std::ostringstream& output, const SourceRegister& input,
bool negate, const std::string& swizzle_mask, bool align = true,
const std::string& address_register_name = std::string()) {
if (align)
output << std::setw(4) << std::right;
output << ((negate ? "-" : "") + input.GetName());
if (!address_register_name.empty())
output << '[' << address_register_name << ']';
output << '.' << swizzle_mask;
};
QVariant GraphicsVertexShaderModel::data(const QModelIndex& index, int role) const {
switch (role) {
case Qt::DisplayRole:
@ -81,43 +94,34 @@ QVariant GraphicsVertexShaderModel::data(const QModelIndex& index, int role) con
case 2:
{
std::stringstream output;
output.flags(std::ios::hex);
std::ostringstream output;
output.flags(std::ios::hex | std::ios::uppercase);
// To make the code aligning columns of assembly easier to keep track of, this function
// keeps track of the start of the start of the previous column, allowing alignment
// based on desired field widths.
int current_column = 0;
auto AlignToColumn = [&](int col_width) {
// Prints spaces to the output to pad previous column to size and advances the
// column marker.
current_column += col_width;
int to_add = std::max(1, current_column - (int)output.tellp());
for (int i = 0; i < to_add; ++i) {
output << ' ';
}
};
Instruction instr = par->info.code[index.row()];
const SwizzlePattern& swizzle = par->info.swizzle_info[instr.common.operand_desc_id].pattern;
// longest known instruction name: "setemit "
output << std::setw(8) << std::left << instr.opcode.Value().GetInfo().name;
int kOpcodeColumnWidth = 8;
// "rXX.xyzw "
int kOutputColumnWidth = 10;
// "-rXX.xyzw ", no attempt is made to align indexed inputs
int kInputOperandColumnWidth = 11;
// e.g. "-c92.xyzw"
static auto print_input = [](std::stringstream& output, const SourceRegister& input,
bool negate, const std::string& swizzle_mask) {
output << std::setw(4) << std::right << (negate ? "-" : "") + input.GetName();
output << "." << swizzle_mask;
};
// e.g. "-c92[a0.x].xyzw"
static auto print_input_indexed = [](std::stringstream& output, const SourceRegister& input,
bool negate, const std::string& swizzle_mask,
const std::string& address_register_name) {
std::string relative_address;
if (!address_register_name.empty())
relative_address = "[" + address_register_name + "]";
output << std::setw(10) << std::right << (negate ? "-" : "") + input.GetName() + relative_address;
output << "." << swizzle_mask;
};
// Use print_input or print_input_indexed depending on whether relative addressing is used or not.
static auto print_input_indexed_compact = [](std::stringstream& output, const SourceRegister& input,
bool negate, const std::string& swizzle_mask,
const std::string& address_register_name) {
if (address_register_name.empty())
print_input(output, input, negate, swizzle_mask);
else
print_input_indexed(output, input, negate, swizzle_mask, address_register_name);
};
output << instr.opcode.Value().GetInfo().name;
switch (instr.opcode.Value().GetInfo().type) {
case OpCode::Type::Trivial:
@ -130,53 +134,54 @@ QVariant GraphicsVertexShaderModel::data(const QModelIndex& index, int role) con
switch (instr.opcode.Value().EffectiveOpCode()) {
case OpCode::Id::CMP:
{
AlignToColumn(kOpcodeColumnWidth);
// NOTE: CMP always writes both cc components, so we do not consider the dest mask here.
output << std::setw(4) << std::right << "cc.";
output << "xy ";
output << " cc.xy";
AlignToColumn(kOutputColumnWidth);
SourceRegister src1 = instr.common.GetSrc1(false);
SourceRegister src2 = instr.common.GetSrc2(false);
print_input_indexed_compact(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false).substr(0,1), instr.common.AddressRegisterName());
output << " " << instr.common.compare_op.ToString(instr.common.compare_op.x) << " ";
print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(true).substr(0,1));
output << ' ';
print_input(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false).substr(0,1), false, instr.common.AddressRegisterName());
output << ' ' << instr.common.compare_op.ToString(instr.common.compare_op.x) << ' ';
print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(true).substr(0,1), false);
output << ", ";
print_input_indexed_compact(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false).substr(1,1), instr.common.AddressRegisterName());
output << " " << instr.common.compare_op.ToString(instr.common.compare_op.y) << " ";
print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(true).substr(1,1));
print_input(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false).substr(1,1), false, instr.common.AddressRegisterName());
output << ' ' << instr.common.compare_op.ToString(instr.common.compare_op.y) << ' ';
print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(true).substr(1,1), false);
break;
}
default:
{
AlignToColumn(kOpcodeColumnWidth);
bool src_is_inverted = 0 != (instr.opcode.Value().GetInfo().subtype & OpCode::Info::SrcInversed);
if (instr.opcode.Value().GetInfo().subtype & OpCode::Info::Dest) {
// e.g. "r12.xy__"
output << std::setw(4) << std::right << instr.common.dest.Value().GetName() + ".";
output << swizzle.DestMaskToString();
output << std::setw(3) << std::right << instr.common.dest.Value().GetName() << '.' << swizzle.DestMaskToString();
} else if (instr.opcode.Value().GetInfo().subtype == OpCode::Info::MOVA) {
output << std::setw(4) << std::right << "a0.";
output << swizzle.DestMaskToString();
} else {
output << " ";
output << " a0." << swizzle.DestMaskToString();
}
output << " ";
AlignToColumn(kOutputColumnWidth);
if (instr.opcode.Value().GetInfo().subtype & OpCode::Info::Src1) {
SourceRegister src1 = instr.common.GetSrc1(src_is_inverted);
print_input_indexed(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false), instr.common.AddressRegisterName());
} else {
output << " ";
print_input(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false), true, instr.common.AddressRegisterName());
AlignToColumn(kInputOperandColumnWidth);
}
// TODO: In some cases, the Address Register is used as an index for SRC2 instead of SRC1
if (instr.opcode.Value().GetInfo().subtype & OpCode::Info::Src2) {
SourceRegister src2 = instr.common.GetSrc2(src_is_inverted);
print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(true));
AlignToColumn(kInputOperandColumnWidth);
}
break;
}
@ -187,45 +192,53 @@ QVariant GraphicsVertexShaderModel::data(const QModelIndex& index, int role) con
case OpCode::Type::Conditional:
{
output << ' ';
switch (instr.opcode.Value().EffectiveOpCode()) {
case OpCode::Id::LOOP:
output << "(unknown instruction format)";
break;
default:
output << "if ";
if (instr.opcode.Value().GetInfo().subtype & OpCode::Info::HasCondition) {
const char* ops[] = {
" || ", " && ", "", ""
};
if (instr.flow_control.op != instr.flow_control.JustY)
output << ((!instr.flow_control.refx) ? "!" : " ") << "cc.x";
output << '(';
output << ops[instr.flow_control.op];
if (instr.flow_control.op != instr.flow_control.JustY) {
if (instr.flow_control.refx) output << '!';
output << "cc.x";
}
if (instr.flow_control.op != instr.flow_control.JustX)
output << ((!instr.flow_control.refy) ? "!" : " ") << "cc.y";
if (instr.flow_control.op == instr.flow_control.Or) {
output << " || ";
} else if (instr.flow_control.op == instr.flow_control.And) {
output << " && ";
}
output << " ";
if (instr.flow_control.op != instr.flow_control.JustX) {
if (instr.flow_control.refy) output << '!';
output << "cc.y";
}
output << ") ";
} else if (instr.opcode.Value().GetInfo().subtype & OpCode::Info::HasUniformIndex) {
output << "b" << instr.flow_control.bool_uniform_id << " ";
output << 'b' << instr.flow_control.bool_uniform_id << ' ';
}
u32 target_addr = instr.flow_control.dest_offset;
u32 target_addr_else = instr.flow_control.dest_offset;
if (instr.opcode.Value().GetInfo().subtype & OpCode::Info::HasAlternative) {
output << "else jump to 0x" << std::setw(4) << std::right << std::setfill('0') << 4 * instr.flow_control.dest_offset << " ";
output << "else jump to 0x" << std::setw(4) << std::right << std::setfill('0') << (4 * instr.flow_control.dest_offset);
} else if (instr.opcode.Value().GetInfo().subtype & OpCode::Info::HasExplicitDest) {
output << "jump to 0x" << std::setw(4) << std::right << std::setfill('0') << 4 * instr.flow_control.dest_offset << " ";
output << "jump to 0x" << std::setw(4) << std::right << std::setfill('0') << (4 * instr.flow_control.dest_offset);
} else {
// TODO: Handle other cases
output << "(unknown destination)";
}
if (instr.opcode.Value().GetInfo().subtype & OpCode::Info::HasFinishPoint) {
output << " (return on " << std::setw(4) << std::right << std::setfill('0')
<< 4 * instr.flow_control.dest_offset + 4 * instr.flow_control.num_instructions << ")";
<< (4 * instr.flow_control.dest_offset + 4 * instr.flow_control.num_instructions) << ')';
}
break;