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Pica/Regs: Use binary search to look up reg names

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This gets rid of the static unordered_map. Also changes the return type
const char*, avoiding unnecessary allocations (the result was only used
by calling .c_str() on it.)
This commit is contained in:
Yuri Kunde Schlesner 2017-01-28 14:48:13 -08:00
parent 602f57da38
commit f241bb72f5
3 changed files with 11 additions and 16 deletions
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2
src/citra_qt/debugger/graphics/graphics_cmdlists.cpp
View file

@ -72,7 +72,7 @@ QVariant GPUCommandListModel::data(const QModelIndex& index, int role) const {
if (role == Qt::DisplayRole) {
switch (index.column()) {
case 0:
return QString::fromLatin1(Pica::Regs::GetCommandName(write.cmd_id).c_str());
return QString::fromLatin1(Pica::Regs::GetRegisterName(write.cmd_id));
case 1:
return QString("%1").arg(write.cmd_id, 3, 16, QLatin1Char('0'));
case 2:

21
src/video_core/regs.cpp
View file

@ -2,8 +2,8 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <iterator>
#include <unordered_map>
#include <utility>
#include "common/common_types.h"
@ -474,19 +474,14 @@ static const std::pair<u16, const char*> register_names[] = {
{0x2DD, "GPUREG_VSH_OPDESCS_DATA7"},
};
std::string Regs::GetCommandName(int index) {
static std::unordered_map<u32, const char*> map;
if (map.empty()) {
map.insert(std::begin(register_names), std::end(register_names));
}
// Return empty string if no match is found
auto it = map.find(index);
if (it != map.end()) {
return it->second;
const char* Regs::GetRegisterName(u16 index) {
auto found = std::lower_bound(std::begin(register_names), std::end(register_names), index,
[](auto p, auto i) { return p.first < i; });
if (found->first == index) {
return found->second;
} else {
return std::string();
// Return empty string if no match is found
return "";
}
}

4
src/video_core/regs.h
View file

@ -64,8 +64,8 @@ struct Regs {
std::array<u32, NUM_REGS> reg_array;
};
// Map register indices to names readable by humans
static std::string GetCommandName(int index);
/// Map register indices to names readable by humans
static const char* GetRegisterName(u16 index);
};
static_assert(sizeof(Regs) == Regs::NUM_REGS * sizeof(u32), "Regs struct has wrong size");