diff options
author | Pirama Arumuga Nainar <pirama@google.com> | 2016-09-19 22:57:26 -0700 |
---|---|---|
committer | Stephen Hines <srhines@google.com> | 2016-10-24 23:58:47 -0700 |
commit | de2d8694e25a814696358e95141f4b1aa4d8847e (patch) | |
tree | c7d38f5bcbb5cac2908ca83704d58b1d7af72752 /lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCCodeEmitter.cpp | |
parent | da112fc9f478e25fc27ede821e85a18687adfbdf (diff) | |
download | llvm-de2d8694e25a814696358e95141f4b1aa4d8847e.tar.gz |
Update aosp/master LLVM for rebase to r275480
Bug: http://b/31320715
This merges commit 7dcf7f03e005379ef2f06db96aa93f06186b66d5 from
aosp/dev.
Test: Build AOSP and run RenderScript tests (host tests for slang and
libbcc, RsTest, CTS)
Change-Id: Iaf3738f74312d875e69f61d604ac058f381a2a1a
Diffstat (limited to 'lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCCodeEmitter.cpp')
-rw-r--r-- | lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCCodeEmitter.cpp | 93 |
1 files changed, 42 insertions, 51 deletions
diff --git a/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCCodeEmitter.cpp b/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCCodeEmitter.cpp index 7c6c79eb5db2..23f8b3d0e827 100644 --- a/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCCodeEmitter.cpp +++ b/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCCodeEmitter.cpp @@ -13,6 +13,7 @@ //===----------------------------------------------------------------------===// #include "MCTargetDesc/WebAssemblyMCTargetDesc.h" +#include "llvm/ADT/STLExtras.h" #include "llvm/ADT/Statistic.h" #include "llvm/MC/MCCodeEmitter.h" #include "llvm/MC/MCFixup.h" @@ -21,80 +22,70 @@ #include "llvm/MC/MCRegisterInfo.h" #include "llvm/MC/MCSubtargetInfo.h" #include "llvm/MC/MCSymbol.h" +#include "llvm/Support/EndianStream.h" #include "llvm/Support/raw_ostream.h" using namespace llvm; #define DEBUG_TYPE "mccodeemitter" +STATISTIC(MCNumEmitted, "Number of MC instructions emitted."); +STATISTIC(MCNumFixups, "Number of MC fixups created."); + namespace { class WebAssemblyMCCodeEmitter final : public MCCodeEmitter { - const MCRegisterInfo &MRI; - -public: - WebAssemblyMCCodeEmitter(const MCInstrInfo &, const MCRegisterInfo &mri, - MCContext &) - : MRI(mri) {} + const MCInstrInfo &MCII; - ~WebAssemblyMCCodeEmitter() override {} - - /// TableGen'erated function for getting the binary encoding for an - /// instruction. + // Implementation generated by tablegen. uint64_t getBinaryCodeForInstr(const MCInst &MI, SmallVectorImpl<MCFixup> &Fixups, const MCSubtargetInfo &STI) const; - /// Return binary encoding of operand. If the machine operand requires - /// relocation, record the relocation and return zero. - unsigned getMachineOpValue(const MCInst &MI, const MCOperand &MO, - SmallVectorImpl<MCFixup> &Fixups, - const MCSubtargetInfo &STI) const; - - uint64_t getMemoryOpValue(const MCInst &MI, unsigned Op, - SmallVectorImpl<MCFixup> &Fixups, - const MCSubtargetInfo &STI) const; - void encodeInstruction(const MCInst &MI, raw_ostream &OS, SmallVectorImpl<MCFixup> &Fixups, const MCSubtargetInfo &STI) const override; + +public: + WebAssemblyMCCodeEmitter(const MCInstrInfo &mcii) : MCII(mcii) {} }; } // end anonymous namespace -MCCodeEmitter *llvm::createWebAssemblyMCCodeEmitter(const MCInstrInfo &MCII, - const MCRegisterInfo &MRI, - MCContext &Ctx) { - return new WebAssemblyMCCodeEmitter(MCII, MRI, Ctx); -} - -unsigned WebAssemblyMCCodeEmitter::getMachineOpValue( - const MCInst &MI, const MCOperand &MO, SmallVectorImpl<MCFixup> &Fixups, - const MCSubtargetInfo &STI) const { - if (MO.isReg()) - return MRI.getEncodingValue(MO.getReg()); - if (MO.isImm()) - return static_cast<unsigned>(MO.getImm()); - - assert(MO.isExpr()); - - assert(MO.getExpr()->getKind() == MCExpr::SymbolRef); - - assert(false && "FIXME: not implemented yet"); - - return 0; +MCCodeEmitter *llvm::createWebAssemblyMCCodeEmitter(const MCInstrInfo &MCII) { + return new WebAssemblyMCCodeEmitter(MCII); } void WebAssemblyMCCodeEmitter::encodeInstruction( const MCInst &MI, raw_ostream &OS, SmallVectorImpl<MCFixup> &Fixups, const MCSubtargetInfo &STI) const { - assert(false && "FIXME: not implemented yet"); -} - -// Encode WebAssembly Memory Operand -uint64_t -WebAssemblyMCCodeEmitter::getMemoryOpValue(const MCInst &MI, unsigned Op, - SmallVectorImpl<MCFixup> &Fixups, - const MCSubtargetInfo &STI) const { - assert(false && "FIXME: not implemented yet"); - return 0; + // FIXME: This is not the real binary encoding. This is an extremely + // over-simplified encoding where we just use uint64_t for everything. This + // is a temporary measure. + support::endian::Writer<support::little>(OS).write<uint64_t>(MI.getOpcode()); + const MCInstrDesc &Desc = MCII.get(MI.getOpcode()); + if (Desc.isVariadic()) + support::endian::Writer<support::little>(OS).write<uint64_t>( + MI.getNumOperands() - Desc.NumOperands); + for (unsigned i = 0, e = MI.getNumOperands(); i < e; ++i) { + const MCOperand &MO = MI.getOperand(i); + if (MO.isReg()) { + support::endian::Writer<support::little>(OS).write<uint64_t>(MO.getReg()); + } else if (MO.isImm()) { + support::endian::Writer<support::little>(OS).write<uint64_t>(MO.getImm()); + } else if (MO.isFPImm()) { + support::endian::Writer<support::little>(OS).write<double>(MO.getFPImm()); + } else if (MO.isExpr()) { + support::endian::Writer<support::little>(OS).write<uint64_t>(0); + Fixups.push_back(MCFixup::create( + (1 + MCII.get(MI.getOpcode()).isVariadic() + i) * sizeof(uint64_t), + MO.getExpr(), + STI.getTargetTriple().isArch64Bit() ? FK_Data_8 : FK_Data_4, + MI.getLoc())); + ++MCNumFixups; + } else { + llvm_unreachable("unexpected operand kind"); + } + } + + ++MCNumEmitted; // Keep track of the # of mi's emitted. } #include "WebAssemblyGenMCCodeEmitter.inc" |