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67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
//===- llvm/Support/Host.h - Host machine characteristics --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Methods for querying the nature of the host machine.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SYSTEM_HOST_H
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#define LLVM_SYSTEM_HOST_H
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#include "llvm/ADT/StringMap.h"
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#include <string>
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namespace llvm {
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namespace sys {
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inline bool isLittleEndianHost() {
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union {
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int i;
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char c;
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};
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i = 1;
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return c;
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}
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inline bool isBigEndianHost() {
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return !isLittleEndianHost();
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}
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/// getDefaultTargetTriple() - Return the target triple of the running
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/// system.
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///
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/// The target triple is a string in the format of:
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/// CPU_TYPE-VENDOR-OPERATING_SYSTEM
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/// or
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/// CPU_TYPE-VENDOR-KERNEL-OPERATING_SYSTEM
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std::string getDefaultTargetTriple();
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/// getHostCPUName - Get the LLVM name for the host CPU. The particular format
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/// of the name is target dependent, and suitable for passing as -mcpu to the
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/// target which matches the host.
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///
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/// \return - The host CPU name, or empty if the CPU could not be determined.
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std::string getHostCPUName();
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/// getHostCPUFeatures - Get the LLVM names for the host CPU features.
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/// The particular format of the names are target dependent, and suitable for
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/// passing as -mattr to the target which matches the host.
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///
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/// \param Features - A string mapping feature names to either
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/// true (if enabled) or false (if disabled). This routine makes no guarantees
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/// about exactly which features may appear in this map, except that they are
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/// all valid LLVM feature names.
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///
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/// \return - True on success.
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bool getHostCPUFeatures(StringMap<bool> &Features);
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}
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}
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#endif
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