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91fd532eb9
Added gp_rel relocations to support addressing small section contents. Added command line to specify small section threshold in bytes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53869 91177308-0d34-0410-b5e6-96231b3b80d8
115 lines
3.5 KiB
C++
115 lines
3.5 KiB
C++
//=====-- MipsSubtarget.h - Define Subtarget for the Mips -----*- 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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// This file declares the Mips specific subclass of TargetSubtarget.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MIPSSUBTARGET_H
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#define MIPSSUBTARGET_H
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#include "llvm/Target/TargetSubtarget.h"
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#include "llvm/Target/TargetMachine.h"
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#include <string>
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namespace llvm {
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class Module;
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class MipsSubtarget : public TargetSubtarget {
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public:
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enum MipsABIEnum {
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O32, O64, N32, N64, EABI
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};
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protected:
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enum MipsArchEnum {
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Mips1, Mips2, Mips3, Mips4, Mips32, Mips32r2, Mips64, Mips64r2
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};
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// Mips architecture version
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MipsArchEnum MipsArchVersion;
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// Mips supported ABIs
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MipsABIEnum MipsABI;
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// IsLittle - The target is Little Endian
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bool IsLittle;
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// IsSingleFloat - The target only supports single precision float
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// point operations. This enable the target to use all 32 32-bit
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// floating point registers instead of only using even ones.
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bool IsSingleFloat;
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// IsFP64bit - The target processor has 64-bit floating point registers.
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bool IsFP64bit;
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// IsFP64bit - General-purpose registers are 64 bits wide
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bool IsGP64bit;
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// HasVFPU - Processor has a vector floating point unit.
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bool HasVFPU;
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// HasSEInReg - Target has SEB and SEH (signext in register) instructions.
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bool HasSEInReg;
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// IsABICall - Enable SRV4 code for SVR4-style dynamic objects
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bool HasABICall;
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// HasAbsoluteCall - Enable code that is not fully position-independent.
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// Only works with HasABICall enabled.
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bool HasAbsoluteCall;
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// isLinux - Target system is Linux. Is false we consider ELFOS for now.
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bool IsLinux;
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// Put global and static items less than or equal to SSectionThreshold
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// bytes into the small data or bss section. The default is 8.
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unsigned SSectionThreshold;
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InstrItineraryData InstrItins;
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public:
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/// Only O32 and EABI supported right now.
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bool isABI_EABI() const { return MipsABI == EABI; }
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bool isABI_O32() const { return MipsABI == O32; }
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unsigned getTargetABI() const { return MipsABI; }
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/// This constructor initializes the data members to match that
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/// of the specified module.
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MipsSubtarget(const TargetMachine &TM, const Module &M,
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const std::string &FS, bool little);
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/// ParseSubtargetFeatures - Parses features string setting specified
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/// subtarget options. Definition of function is auto generated by tblgen.
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void ParseSubtargetFeatures(const std::string &FS, const std::string &CPU);
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bool hasMips2Ops() const { return MipsArchVersion >= Mips2; }
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bool isLittle() const { return IsLittle; }
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bool isFP64bit() const { return IsFP64bit; };
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bool isGP64bit() const { return IsGP64bit; };
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bool isGP32bit() const { return !IsGP64bit; };
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bool isSingleFloat() const { return IsSingleFloat; };
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bool isNotSingleFloat() const { return !IsSingleFloat; };
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bool hasVFPU() const { return HasVFPU; };
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bool hasSEInReg() const { return HasSEInReg; };
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bool hasABICall() const { return HasABICall; };
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bool hasAbsoluteCall() const { return HasAbsoluteCall; };
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bool isLinux() const { return IsLinux; };
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unsigned getSSectionThreshold() const { return SSectionThreshold; }
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};
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} // End llvm namespace
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#endif
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