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-rw-r--r--lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp204
1 files changed, 202 insertions, 2 deletions
diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
index d632c27..8208725 100644
--- a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
+++ b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
@@ -20,9 +20,9 @@
#include "llvm/ADT/SmallVector.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCFixup.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
-#include "llvm/MC/MCFixup.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Support/raw_ostream.h"
@@ -173,7 +173,8 @@ EncodeInstruction(const MCInst &MI, raw_ostream &OS,
// Unfortunately in MIPS both NOP and SLL will come in with Binary == 0
// so we have to special check for them.
unsigned Opcode = TmpInst.getOpcode();
- if ((Opcode != Mips::NOP) && (Opcode != Mips::SLL) && !Binary)
+ if ((Opcode != Mips::NOP) && (Opcode != Mips::SLL) &&
+ (Opcode != Mips::SLL_MM) && !Binary)
llvm_unreachable("unimplemented opcode in EncodeInstruction()");
if (STI.getFeatureBits() & Mips::FeatureMicroMips) {
@@ -219,6 +220,50 @@ getBranchTargetOpValue(const MCInst &MI, unsigned OpNo,
return 0;
}
+/// getBranchTarget7OpValueMM - Return binary encoding of the microMIPS branch
+/// target operand. If the machine operand requires relocation,
+/// record the relocation and return zero.
+unsigned MipsMCCodeEmitter::
+getBranchTarget7OpValueMM(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+
+ const MCOperand &MO = MI.getOperand(OpNo);
+
+ // If the destination is an immediate, divide by 2.
+ if (MO.isImm()) return MO.getImm() >> 1;
+
+ assert(MO.isExpr() &&
+ "getBranchTargetOpValueMM expects only expressions or immediates");
+
+ const MCExpr *Expr = MO.getExpr();
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ MCFixupKind(Mips::fixup_MICROMIPS_PC7_S1)));
+ return 0;
+}
+
+/// getBranchTargetOpValueMMPC10 - Return binary encoding of the microMIPS
+/// 10-bit branch target operand. If the machine operand requires relocation,
+/// record the relocation and return zero.
+unsigned MipsMCCodeEmitter::
+getBranchTargetOpValueMMPC10(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+
+ const MCOperand &MO = MI.getOperand(OpNo);
+
+ // If the destination is an immediate, divide by 2.
+ if (MO.isImm()) return MO.getImm() >> 1;
+
+ assert(MO.isExpr() &&
+ "getBranchTargetOpValuePC10 expects only expressions or immediates");
+
+ const MCExpr *Expr = MO.getExpr();
+ Fixups.push_back(MCFixup::Create(0, Expr,
+ MCFixupKind(Mips::fixup_MICROMIPS_PC10_S1)));
+ return 0;
+}
+
/// getBranchTargetOpValue - Return binary encoding of the microMIPS branch
/// target operand. If the machine operand requires relocation,
/// record the relocation and return zero.
@@ -635,6 +680,77 @@ MipsMCCodeEmitter::getMemEncoding(const MCInst &MI, unsigned OpNo,
}
unsigned MipsMCCodeEmitter::
+getMemEncodingMMImm4(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ // Base register is encoded in bits 6-4, offset is encoded in bits 3-0.
+ assert(MI.getOperand(OpNo).isReg());
+ unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo),
+ Fixups, STI) << 4;
+ unsigned OffBits = getMachineOpValue(MI, MI.getOperand(OpNo+1),
+ Fixups, STI);
+
+ return (OffBits & 0xF) | RegBits;
+}
+
+unsigned MipsMCCodeEmitter::
+getMemEncodingMMImm4Lsl1(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ // Base register is encoded in bits 6-4, offset is encoded in bits 3-0.
+ assert(MI.getOperand(OpNo).isReg());
+ unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo),
+ Fixups, STI) << 4;
+ unsigned OffBits = getMachineOpValue(MI, MI.getOperand(OpNo+1),
+ Fixups, STI) >> 1;
+
+ return (OffBits & 0xF) | RegBits;
+}
+
+unsigned MipsMCCodeEmitter::
+getMemEncodingMMImm4Lsl2(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ // Base register is encoded in bits 6-4, offset is encoded in bits 3-0.
+ assert(MI.getOperand(OpNo).isReg());
+ unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo),
+ Fixups, STI) << 4;
+ unsigned OffBits = getMachineOpValue(MI, MI.getOperand(OpNo+1),
+ Fixups, STI) >> 2;
+
+ return (OffBits & 0xF) | RegBits;
+}
+
+unsigned MipsMCCodeEmitter::
+getMemEncodingMMSPImm5Lsl2(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ // Register is encoded in bits 9-5, offset is encoded in bits 4-0.
+ assert(MI.getOperand(OpNo).isReg() &&
+ MI.getOperand(OpNo).getReg() == Mips::SP &&
+ "Unexpected base register!");
+ unsigned OffBits = getMachineOpValue(MI, MI.getOperand(OpNo+1),
+ Fixups, STI) >> 2;
+
+ return OffBits & 0x1F;
+}
+
+unsigned MipsMCCodeEmitter::
+getMemEncodingMMGPImm7Lsl2(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ // Register is encoded in bits 9-7, offset is encoded in bits 6-0.
+ assert(MI.getOperand(OpNo).isReg() &&
+ MI.getOperand(OpNo).getReg() == Mips::GP &&
+ "Unexpected base register!");
+
+ unsigned OffBits = getMachineOpValue(MI, MI.getOperand(OpNo+1),
+ Fixups, STI) >> 2;
+
+ return OffBits & 0x7F;
+}
+
+unsigned MipsMCCodeEmitter::
getMemEncodingMMImm12(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
@@ -657,6 +773,30 @@ getMemEncodingMMImm12(const MCInst &MI, unsigned OpNo,
return (OffBits & 0x0FFF) | RegBits;
}
+unsigned MipsMCCodeEmitter::
+getMemEncodingMMImm4sp(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ // opNum can be invalid if instruction had reglist as operand
+ // MemOperand is always last operand of instruction (base + offset)
+ switch (MI.getOpcode()) {
+ default:
+ break;
+ case Mips::SWM16_MM:
+ case Mips::LWM16_MM:
+ OpNo = MI.getNumOperands() - 2;
+ break;
+ }
+
+ // Offset is encoded in bits 4-0.
+ assert(MI.getOperand(OpNo).isReg());
+ // Base register is always SP - thus it is not encoded.
+ assert(MI.getOperand(OpNo+1).isImm());
+ unsigned OffBits = getMachineOpValue(MI, MI.getOperand(OpNo+1), Fixups, STI);
+
+ return ((OffBits >> 2) & 0x0F);
+}
+
unsigned
MipsMCCodeEmitter::getSizeExtEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
@@ -788,4 +928,64 @@ MipsMCCodeEmitter::getRegisterListOpValue(const MCInst &MI, unsigned OpNo,
return res;
}
+unsigned
+MipsMCCodeEmitter::getRegisterListOpValue16(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ return (MI.getNumOperands() - 4);
+}
+
+unsigned
+MipsMCCodeEmitter::getRegisterPairOpValue(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ return getMachineOpValue(MI, MI.getOperand(OpNo), Fixups, STI);
+}
+
+unsigned
+MipsMCCodeEmitter::getMovePRegPairOpValue(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ unsigned res = 0;
+
+ if (MI.getOperand(0).getReg() == Mips::A1 &&
+ MI.getOperand(1).getReg() == Mips::A2)
+ res = 0;
+ else if (MI.getOperand(0).getReg() == Mips::A1 &&
+ MI.getOperand(1).getReg() == Mips::A3)
+ res = 1;
+ else if (MI.getOperand(0).getReg() == Mips::A2 &&
+ MI.getOperand(1).getReg() == Mips::A3)
+ res = 2;
+ else if (MI.getOperand(0).getReg() == Mips::A0 &&
+ MI.getOperand(1).getReg() == Mips::S5)
+ res = 3;
+ else if (MI.getOperand(0).getReg() == Mips::A0 &&
+ MI.getOperand(1).getReg() == Mips::S6)
+ res = 4;
+ else if (MI.getOperand(0).getReg() == Mips::A0 &&
+ MI.getOperand(1).getReg() == Mips::A1)
+ res = 5;
+ else if (MI.getOperand(0).getReg() == Mips::A0 &&
+ MI.getOperand(1).getReg() == Mips::A2)
+ res = 6;
+ else if (MI.getOperand(0).getReg() == Mips::A0 &&
+ MI.getOperand(1).getReg() == Mips::A3)
+ res = 7;
+
+ return res;
+}
+
+unsigned
+MipsMCCodeEmitter::getSimm23Lsl2Encoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const {
+ const MCOperand &MO = MI.getOperand(OpNo);
+ assert(MO.isImm() && "getSimm23Lsl2Encoding expects only an immediate");
+ // The immediate is encoded as 'immediate >> 2'.
+ unsigned Res = static_cast<unsigned>(MO.getImm());
+ assert((Res & 3) == 0);
+ return Res >> 2;
+}
+
#include "MipsGenMCCodeEmitter.inc"
generated by cgit v1.1 at 2024-05-18 02:12:10 +0000