mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
d6adfb4c85
Based on post-commit review comments by Chandler Carruth on https://reviews.llvm.org/D31236. Thanks! llvm-svn: 299211
90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
//===- llvm/Support/Host.h - Host machine characteristics --------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Methods for querying the nature of the host machine.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SUPPORT_HOST_H
|
|
#define LLVM_SUPPORT_HOST_H
|
|
|
|
#include "llvm/ADT/StringMap.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
|
|
#if defined(__linux__) || defined(__GNU__) || defined(__HAIKU__)
|
|
#include <endian.h>
|
|
#elif defined(_AIX)
|
|
#include <sys/machine.h>
|
|
#else
|
|
#if !defined(BYTE_ORDER) && !defined(LLVM_ON_WIN32)
|
|
#include <machine/endian.h>
|
|
#endif
|
|
#endif
|
|
|
|
#include <string>
|
|
|
|
namespace llvm {
|
|
namespace sys {
|
|
|
|
#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
|
|
constexpr bool IsBigEndianHost = true;
|
|
#else
|
|
constexpr bool IsBigEndianHost = false;
|
|
#endif
|
|
|
|
static const bool IsLittleEndianHost = !IsBigEndianHost;
|
|
|
|
/// getDefaultTargetTriple() - Return the default target triple the compiler
|
|
/// has been configured to produce code for.
|
|
///
|
|
/// The target triple is a string in the format of:
|
|
/// CPU_TYPE-VENDOR-OPERATING_SYSTEM
|
|
/// or
|
|
/// CPU_TYPE-VENDOR-KERNEL-OPERATING_SYSTEM
|
|
std::string getDefaultTargetTriple();
|
|
|
|
/// getProcessTriple() - Return an appropriate target triple for generating
|
|
/// code to be loaded into the current process, e.g. when using the JIT.
|
|
std::string getProcessTriple();
|
|
|
|
/// getHostCPUName - Get the LLVM name for the host CPU. The particular format
|
|
/// of the name is target dependent, and suitable for passing as -mcpu to the
|
|
/// target which matches the host.
|
|
///
|
|
/// \return - The host CPU name, or empty if the CPU could not be determined.
|
|
StringRef getHostCPUName();
|
|
|
|
/// getHostCPUFeatures - Get the LLVM names for the host CPU features.
|
|
/// The particular format of the names are target dependent, and suitable for
|
|
/// passing as -mattr to the target which matches the host.
|
|
///
|
|
/// \param Features - A string mapping feature names to either
|
|
/// true (if enabled) or false (if disabled). This routine makes no guarantees
|
|
/// about exactly which features may appear in this map, except that they are
|
|
/// all valid LLVM feature names.
|
|
///
|
|
/// \return - True on success.
|
|
bool getHostCPUFeatures(StringMap<bool> &Features);
|
|
|
|
/// Get the number of physical cores (as opposed to logical cores returned
|
|
/// from thread::hardware_concurrency(), which includes hyperthreads).
|
|
/// Returns -1 if unknown for the current host system.
|
|
int getHostNumPhysicalCores();
|
|
|
|
namespace detail {
|
|
/// Helper functions to extract HostCPUName from /proc/cpuinfo on linux.
|
|
StringRef getHostCPUNameForPowerPC(const StringRef &ProcCpuinfoContent);
|
|
StringRef getHostCPUNameForARM(const StringRef &ProcCpuinfoContent);
|
|
StringRef getHostCPUNameForS390x(const StringRef &ProcCpuinfoContent);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|