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Add definition of DSBH (Double Swap Bytes within Halfwords) and 

DSHD (Double Swap Halfwords within Doublewords). Add a pattern which replaces
64-bit bswap with a DSBH and DSHD pair.

llvm-svn: 147017
This commit is contained in:
Akira Hatanaka 2011-12-20 23:56:43 +00:00
parent 5bc5a76d9b
commit 4706ac9715
2 changed files with 9 additions and 1 deletions
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6
llvm/lib/Target/Mips/Mips64InstrInfo.td
View File

@ -199,6 +199,10 @@ def MFLO64 : MoveFromLOHI<0x12, "mflo", CPU64Regs, [LO64]>;
def DCLZ : CountLeading0<0x24, "dclz", CPU64Regs>;
def DCLO : CountLeading1<0x25, "dclo", CPU64Regs>;
/// Double Word Swap Bytes/HalfWords
def DSBH : SubwordSwap<0x24, 0x2, "dsbh", CPU64Regs>;
def DSHD : SubwordSwap<0x24, 0x5, "dshd", CPU64Regs>;
def LEA_ADDiu64 : EffectiveAddress<"addiu\t$rt, $addr", CPU64Regs, mem_ea_64>;
let Uses = [SP_64] in
@ -316,3 +320,5 @@ def : Pat<(i64 (sext CPURegs:$src)), (SLL64_32 CPURegs:$src)>;
// Sign extend in register
def : Pat<(i64 (sext_inreg CPU64Regs:$src, i32)), (SLL64_64 CPU64Regs:$src)>;
// bswap pattern
def : Pat<(bswap CPU64Regs:$rt), (DSHD (DSBH CPU64Regs:$rt))>;

4
llvm/lib/Target/Mips/MipsISelLowering.cpp
View File

@ -221,8 +221,10 @@ MipsTargetLowering(MipsTargetMachine &TM)
if (!Subtarget->hasBitCount())
setOperationAction(ISD::CTLZ, MVT::i32, Expand);
if (!Subtarget->hasSwap())
if (!Subtarget->hasSwap()) {
setOperationAction(ISD::BSWAP, MVT::i32, Expand);
setOperationAction(ISD::BSWAP, MVT::i64, Expand);
}
setTargetDAGCombine(ISD::ADDE);
setTargetDAGCombine(ISD::SUBE);