1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
| //===-- Target.cpp ----------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "../Target.h"
#include "../Latency.h"
#include "Mips.h"
#include "MipsRegisterInfo.h"
namespace llvm {
namespace exegesis {
#include "MipsGenExegesis.inc"
namespace {
class ExegesisMipsTarget : public ExegesisTarget {
public:
ExegesisMipsTarget() : ExegesisTarget(MipsCpuPfmCounters) {}
private:
std::vector<MCInst> setRegTo(const MCSubtargetInfo &STI, unsigned Reg,
const APInt &Value) const override;
bool matchesArch(Triple::ArchType Arch) const override {
return Arch == Triple::mips || Arch == Triple::mipsel ||
Arch == Triple::mips64 || Arch == Triple::mips64el;
}
};
} // end anonymous namespace
// Generates instruction to load an immediate value into a register.
static MCInst loadImmediate(unsigned Reg, unsigned RegBitWidth,
const APInt &Value) {
if (Value.getActiveBits() > 16)
llvm_unreachable("Not implemented for Values wider than 16 bits");
if (Value.getBitWidth() > RegBitWidth)
llvm_unreachable("Value must fit in the Register");
return MCInstBuilder(Mips::ORi)
.addReg(Reg)
.addReg(Mips::ZERO)
.addImm(Value.getZExtValue());
}
std::vector<MCInst> ExegesisMipsTarget::setRegTo(const MCSubtargetInfo &STI,
unsigned Reg,
const APInt &Value) const {
if (Mips::GPR32RegClass.contains(Reg))
return {loadImmediate(Reg, 32, Value)};
if (Mips::GPR64RegClass.contains(Reg))
return {loadImmediate(Reg, 64, Value)};
errs() << "setRegTo is not implemented, results will be unreliable\n";
return {};
}
static ExegesisTarget *getTheExegesisMipsTarget() {
static ExegesisMipsTarget Target;
return &Target;
}
void InitializeMipsExegesisTarget() {
ExegesisTarget::registerTarget(getTheExegesisMipsTarget());
}
} // namespace exegesis
} // namespace llvm
|