diff options
Diffstat (limited to 'contrib/llvm/lib/Target/Mips/MipsCodeEmitter.cpp')
-rw-r--r-- | contrib/llvm/lib/Target/Mips/MipsCodeEmitter.cpp | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/contrib/llvm/lib/Target/Mips/MipsCodeEmitter.cpp b/contrib/llvm/lib/Target/Mips/MipsCodeEmitter.cpp index 9220d9c..23fabe3 100644 --- a/contrib/llvm/lib/Target/Mips/MipsCodeEmitter.cpp +++ b/contrib/llvm/lib/Target/Mips/MipsCodeEmitter.cpp @@ -105,6 +105,9 @@ class MipsCodeEmitter : public MachineFunctionPass { unsigned getRelocation(const MachineInstr &MI, const MachineOperand &MO) const; + unsigned getMemEncoding(const MachineInstr &MI, unsigned OpNo) const; + unsigned getSizeExtEncoding(const MachineInstr &MI, unsigned OpNo) const; + unsigned getSizeInsEncoding(const MachineInstr &MI, unsigned OpNo) const; }; } @@ -153,6 +156,28 @@ unsigned MipsCodeEmitter::getRelocation(const MachineInstr &MI, return Mips::reloc_mips_lo; } +unsigned MipsCodeEmitter::getMemEncoding(const MachineInstr &MI, + unsigned OpNo) const { + // Base register is encoded in bits 20-16, offset is encoded in bits 15-0. + assert(MI.getOperand(OpNo).isReg()); + unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo)) << 16; + return + (getMachineOpValue(MI, MI.getOperand(OpNo+1)) & 0xFFFF) | RegBits; +} + +unsigned MipsCodeEmitter::getSizeExtEncoding(const MachineInstr &MI, + unsigned OpNo) const { + // size is encoded as size-1. + return getMachineOpValue(MI, MI.getOperand(OpNo)) - 1; +} + +unsigned MipsCodeEmitter::getSizeInsEncoding(const MachineInstr &MI, + unsigned OpNo) const { + // size is encoded as pos+size-1. + return getMachineOpValue(MI, MI.getOperand(OpNo-1)) + + getMachineOpValue(MI, MI.getOperand(OpNo)) - 1; +} + /// getMachineOpValue - Return binary encoding of operand. If the machine /// operand requires relocation, record the relocation and return zero. unsigned MipsCodeEmitter::getMachineOpValue(const MachineInstr &MI, @@ -238,8 +263,4 @@ FunctionPass *llvm::createMipsJITCodeEmitterPass(MipsTargetMachine &TM, return new MipsCodeEmitter(TM, JCE); } -unsigned MipsCodeEmitter::getBinaryCodeForInstr(const MachineInstr &MI) const { - // this function will be automatically generated by the CodeEmitterGenerator - // using TableGen - return 0; -} +#include "MipsGenCodeEmitter.inc" |