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[AArch64] Adjust the cost model for Exynos M3 

Add special case for rotate right.

llvm-svn: 327662
This commit is contained in:
Evandro Menezes 2018-03-15 20:31:25 +00:00
parent 1515e859c6
commit 5303f897d4
1 changed files with 7 additions and 0 deletions
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7
llvm/lib/Target/AArch64/AArch64SchedExynosM3.td
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@ -110,6 +110,10 @@ def M3BranchLinkFastPred : SchedPredicate<[{MI->getOpcode() == AArch64::BLR &&
MI->getOperand(0).isReg() &&
MI->getOperand(0).getReg() != AArch64::LR}]>;
def M3ResetFastPred : SchedPredicate<[{TII->isExynosResetFast(*MI)}]>;
def M3RotateFastPred : SchedPredicate<[{(MI->getOpcode() == AArch64::EXTRWrri ||
MI->getOpcode() == AArch64::EXTRXrri) &&
MI->getOperand(0).isReg() && MI->getOperand(1).isReg() &&
MI->getOperand(0).getReg() == MI->getOperand(1).getReg()}]>;
def M3ShiftLeftFastPred : SchedPredicate<[{TII->isExynosShiftLeftFast(*MI)}]>;
//===----------------------------------------------------------------------===//
@ -136,6 +140,8 @@ def M3WriteC2 : SchedWriteRes<[M3UnitC]> { let Latency = 2; }
def M3WriteAX : SchedWriteVariant<[SchedVar<M3ResetFastPred, [M3WriteZ0]>,
SchedVar<M3ShiftLeftFastPred, [M3WriteA1]>,
SchedVar<NoSchedPred, [M3WriteAA]>]>;
def M3WriteAY : SchedWriteVariant<[SchedVar<M3RotateFastPred, [M3WriteA1]>,
SchedVar<NoSchedPred, [M3WriteAA]>]>;
def M3WriteB1 : SchedWriteRes<[M3UnitB]> { let Latency = 1; }
def M3WriteBX : SchedWriteVariant<[SchedVar<M3BranchLinkFastPred, [M3WriteAB]>,
@ -500,6 +506,7 @@ def : InstRW<[M3WriteZ0], (instregex "^MOV[NZ][WX]i")>;
// Divide and multiply instructions.
// Miscellaneous instructions.
def : InstRW<[M3WriteAY], (instregex "^EXTR[WX]rri")>;
// Load instructions.
def : InstRW<[M3WriteLD,