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JitArm64: Reimplement aarch64 cycle counters.

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CNTVCT_EL0 is force-enabled on all linux plattforms.
Windows is untested, but as this is the best way to get *any* low
overhead performance counters, they likely use it as well.
This commit is contained in:
degasus 2017-08-13 01:51:37 +02:00
commit 304e601ad3
5 changed files with 34 additions and 69 deletions
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8
Source/Core/Common/Arm64Emitter.cpp
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@ -1218,6 +1218,14 @@ void ARM64XEmitter::MRS(ARM64Reg Rt, PStateField field)
EncodeSystemInst(o0 | 4, op1, CRn, CRm, op2, DecodeReg(Rt));
}
void ARM64XEmitter::CNTVCT(Arm64Gen::ARM64Reg Rt)
{
_assert_msg_(DYNA_REC, Is64Bit(Rt), "CNTVCT: Rt must be 64-bit");
// MRS <Xt>, CNTVCT_EL0 ; Read CNTVCT_EL0 into Xt
EncodeSystemInst(3 | 4, 3, 0xe, 0, 2, DecodeReg(Rt));
}
void ARM64XEmitter::HINT(SystemHint op)
{
EncodeSystemInst(0, 3, 2, 0, op, WSP);