gzdoom/tools/drawergen/drawergen.cpp

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/*
** LLVM code generated drawers
** Copyright (c) 2016 Magnus Norddahl
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
*/
#include "precomp.h"
#include "timestamp.h"
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#include "exception.h"
#include "llvmdrawers.h"
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std::string &AllTimestamps()
{
static std::string timestamps;
return timestamps;
}
void AddSourceFileTimestamp(const char *timestamp)
{
if (!AllTimestamps().empty()) AllTimestamps().push_back(' ');
AllTimestamps() += timestamp;
}
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int main(int argc, char **argv)
{
try
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{
if (argc != 2)
{
std::cerr << "Usage: " << argv[0] << "<output filename>" << std::endl;
return 1;
}
std::string timestamp_filename = argv[1] + std::string(".timestamp");
FILE *file = fopen(timestamp_filename.c_str(), "rb");
if (file != nullptr)
{
char buffer[4096];
int bytes_read = fread(buffer, 1, 4096, file);
fclose(file);
std::string last_timestamp;
if (bytes_read > 0)
last_timestamp = std::string(buffer, bytes_read);
if (AllTimestamps() == last_timestamp)
{
std::cout << "Not recompiling drawers because the object file is already up to date." << std::endl;
exit(0);
}
}
llvm::install_fatal_error_handler([](void *user_data, const std::string& reason, bool gen_crash_diag)
{
std::cerr << "LLVM fatal error: " << reason;
exit(1);
});
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llvm::InitializeNativeTarget();
llvm::InitializeNativeTargetAsmPrinter();
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std::string triple = llvm::sys::getDefaultTargetTriple();
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#ifdef __APPLE__
// Target triple is x86_64-apple-darwin15.6.0
auto pos = triple.find("-apple-darwin");
if (pos != std::string::npos)
{
triple = triple.substr(0, pos) + "-apple-darwin10.11.0";
}
#endif
std::cout << "Target triple is " << triple << std::endl;
#ifdef __arm__
std::string cpuName = "armv8";
#else
std::string cpuName = "pentium4";
#endif
std::string features;
std::cout << "Compiling drawer code for " << cpuName << ".." << std::endl;
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LLVMDrawers drawersSSE2(triple, cpuName, features, "_SSE2");
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file = fopen(argv[1], "wb");
if (file == nullptr)
{
std::cerr << "Unable to open " << argv[1] << " for writing." << std::endl;
return 1;
}
int result = fwrite(drawersSSE2.ObjectFile.data(), drawersSSE2.ObjectFile.size(), 1, file);
fclose(file);
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if (result != 1)
{
std::cerr << "Could not write data to " << argv[1] << std::endl;
return 1;
}
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file = fopen(timestamp_filename.c_str(), "wb");
if (file == nullptr)
{
std::cerr << "Could not create timestamp file" << std::endl;
return 1;
}
result = fwrite(AllTimestamps().data(), AllTimestamps().length(), 1, file);
fclose(file);
if (result != 1)
{
std::cerr << "Could not write timestamp file" << std::endl;
return 1;
}
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//LLVMDrawers drawersSSE4("core2");
//LLVMDrawers drawersAVX("sandybridge");
//LLVMDrawers drawersAVX2("haswell");
return 0;
}
catch (const std::exception &e)
{
std::cerr << e.what() << std::endl;
return 1;
}
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}