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[mips] Add initial support for NaN2008 in the back-end.

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This is so that EF_MIPS_NAN2008 is set if we are using IEEE 754-2008
NaN encoding (-mnan=2008). This patch also adds support for parsing
'.nan legacy' and '.nan 2008' assembly directives. The handling of
these directives should match GAS' behaviour i.e., the last directive
in use sets the ELF header bit (EF_MIPS_NAN2008).

Differential Revision: http://reviews.llvm.org/D3346


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206396 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matheus Almeida
2014-04-16 15:48:55 +00:00
parent 92d2f98664
commit c308f165a0
12 changed files with 237 additions and 12 deletions
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21
lib/Target/Mips/MipsSubtarget.cpp
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@@ -77,17 +77,16 @@ void MipsSubtarget::anchor() { }
MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
const std::string &FS, bool little,
Reloc::Model _RM, MipsTargetMachine *_TM) :
MipsGenSubtargetInfo(TT, CPU, FS),
MipsArchVersion(Mips32), MipsABI(UnknownABI), IsLittle(little),
IsSingleFloat(false), IsFP64bit(false), IsGP64bit(false), HasVFPU(false),
HasCnMips(false), IsLinux(true), HasSEInReg(false), HasCondMov(false),
HasSwap(false), HasBitCount(false), HasFPIdx(false),
InMips16Mode(false), InMips16HardFloat(Mips16HardFloat),
InMicroMipsMode(false), HasDSP(false), HasDSPR2(false),
AllowMixed16_32(Mixed16_32 | Mips_Os16), Os16(Mips_Os16), HasMSA(false),
RM(_RM), OverrideMode(NoOverride), TM(_TM), TargetTriple(TT)
{
Reloc::Model _RM, MipsTargetMachine *_TM)
: MipsGenSubtargetInfo(TT, CPU, FS), MipsArchVersion(Mips32),
MipsABI(UnknownABI), IsLittle(little), IsSingleFloat(false),
IsFP64bit(false), IsNaN2008bit(false), IsGP64bit(false), HasVFPU(false),
HasCnMips(false), IsLinux(true), HasSEInReg(false), HasCondMov(false),
HasSwap(false), HasBitCount(false), HasFPIdx(false), InMips16Mode(false),
InMips16HardFloat(Mips16HardFloat), InMicroMipsMode(false), HasDSP(false),
HasDSPR2(false), AllowMixed16_32(Mixed16_32 | Mips_Os16), Os16(Mips_Os16),
HasMSA(false), RM(_RM), OverrideMode(NoOverride), TM(_TM),
TargetTriple(TT) {
std::string CPUName = CPU;
CPUName = selectMipsCPU(TT, CPUName);