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[MSP430] Add subtarget features for hardware multiplier.

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Also add more processors to make -mcpu option behave similar to gcc.

Differential Revision: https://reviews.llvm.org/D33335

llvm-svn: 303695
This commit is contained in:
Vadzim Dambrouski 2017-05-23 21:49:42 +00:00
parent 03923e811e
commit a328f25e7f
7 changed files with 57 additions and 25 deletions
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14
lib/Target/MSP430/MSP430.td
View File

@ -22,6 +22,18 @@ def FeatureX
: SubtargetFeature<"ext", "ExtendedInsts", "true",
"Enable MSP430-X extensions">;
def FeatureHWMult16
: SubtargetFeature<"hwmult16", "HWMultMode", "HWMult16",
"Enable 16-bit hardware multiplier">;
def FeatureHWMult32
: SubtargetFeature<"hwmult32", "HWMultMode", "HWMult32",
"Enable 32-bit hardware multiplier">;
def FeatureHWMultF5
: SubtargetFeature<"hwmultf5", "HWMultMode", "HWMultF5",
"Enable F5 series hardware multiplier">;
//===----------------------------------------------------------------------===//
// MSP430 supported processors.
//===----------------------------------------------------------------------===//
@ -29,6 +41,8 @@ class Proc<string Name, list<SubtargetFeature> Features>
: Processor<Name, NoItineraries, Features>;
def : Proc<"generic", []>;
def : Proc<"msp430", []>;
def : Proc<"msp430x", [FeatureX]>;
//===----------------------------------------------------------------------===//
// Register File Description

27
lib/Target/MSP430/MSP430ISelLowering.cpp
View File

@ -38,27 +38,6 @@ using namespace llvm;
#define DEBUG_TYPE "msp430-lower"
typedef enum {
NoHWMult,
HWMult16,
HWMult32,
HWMultF5
} HWMultUseMode;
static cl::opt<HWMultUseMode>
HWMultMode("mhwmult", cl::Hidden,
cl::desc("Hardware multiplier use mode"),
cl::init(NoHWMult),
cl::values(
clEnumValN(NoHWMult, "none",
"Do not use hardware multiplier"),
clEnumValN(HWMult16, "16bit",
"Use 16-bit hardware multiplier"),
clEnumValN(HWMult32, "32bit",
"Use 32-bit hardware multiplier"),
clEnumValN(HWMultF5, "f5series",
"Use F5 series hardware multiplier")));
MSP430TargetLowering::MSP430TargetLowering(const TargetMachine &TM,
const MSP430Subtarget &STI)
: TargetLowering(TM) {
@ -262,7 +241,7 @@ MSP430TargetLowering::MSP430TargetLowering(const TargetMachine &TM,
setCmpLibcallCC(LC.Op, LC.Cond);
}
if (HWMultMode == HWMult16) {
if (STI.hasHWMult16()) {
const struct {
const RTLIB::Libcall Op;
const char * const Name;
@ -277,7 +256,7 @@ MSP430TargetLowering::MSP430TargetLowering(const TargetMachine &TM,
for (const auto &LC : LibraryCalls) {
setLibcallName(LC.Op, LC.Name);
}
} else if (HWMultMode == HWMult32) {
} else if (STI.hasHWMult32()) {
const struct {
const RTLIB::Libcall Op;
const char * const Name;
@ -292,7 +271,7 @@ MSP430TargetLowering::MSP430TargetLowering(const TargetMachine &TM,
for (const auto &LC : LibraryCalls) {
setLibcallName(LC.Op, LC.Name);
}
} else if (HWMultMode == HWMultF5) {
} else if (STI.hasHWMultF5()) {
const struct {
const RTLIB::Libcall Op;
const char * const Name;

27
lib/Target/MSP430/MSP430Subtarget.cpp
View File

@ -19,6 +19,20 @@ using namespace llvm;
#define DEBUG_TYPE "msp430-subtarget"
static cl::opt<MSP430Subtarget::HWMultEnum>
HWMultModeOption("mhwmult", cl::Hidden,
cl::desc("Hardware multiplier use mode for MSP430"),
cl::init(MSP430Subtarget::NoHWMult),
cl::values(
clEnumValN(MSP430Subtarget::NoHWMult, "none",
"Do not use hardware multiplier"),
clEnumValN(MSP430Subtarget::HWMult16, "16bit",
"Use 16-bit hardware multiplier"),
clEnumValN(MSP430Subtarget::HWMult32, "32bit",
"Use 32-bit hardware multiplier"),
clEnumValN(MSP430Subtarget::HWMultF5, "f5series",
"Use F5 series hardware multiplier")));
#define GET_SUBTARGETINFO_TARGET_DESC
#define GET_SUBTARGETINFO_CTOR
#include "MSP430GenSubtargetInfo.inc"
@ -27,7 +41,18 @@ void MSP430Subtarget::anchor() { }
MSP430Subtarget &
MSP430Subtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
ParseSubtargetFeatures("generic", FS);
ExtendedInsts = false;
HWMultMode = NoHWMult;
std::string CPUName = CPU;
if (CPUName.empty())
CPUName = "msp430";
ParseSubtargetFeatures(CPUName, FS);
if (HWMultModeOption != NoHWMult)
HWMultMode = HWMultModeOption;
return *this;
}

11
lib/Target/MSP430/MSP430Subtarget.h
View File

@ -30,8 +30,15 @@ namespace llvm {
class StringRef;
class MSP430Subtarget : public MSP430GenSubtargetInfo {
public:
enum HWMultEnum {
NoHWMult, HWMult16, HWMult32, HWMultF5
};
private:
virtual void anchor();
bool ExtendedInsts;
HWMultEnum HWMultMode;
MSP430FrameLowering FrameLowering;
MSP430InstrInfo InstrInfo;
MSP430TargetLowering TLInfo;
@ -50,6 +57,10 @@ public:
/// subtarget options. Definition of function is auto generated by tblgen.
void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
bool hasHWMult16() const { return HWMultMode == HWMult16; }
bool hasHWMult32() const { return HWMultMode == HWMult32; }
bool hasHWMultF5() const { return HWMultMode == HWMultF5; }
const TargetFrameLowering *getFrameLowering() const override {
return &FrameLowering;
}

1
test/CodeGen/MSP430/hwmult16.ll
View File

@ -1,4 +1,5 @@
; RUN: llc -O0 -mhwmult=16bit < %s | FileCheck %s
; RUN: llc -O0 -mattr=+hwmult16 < %s | FileCheck %s
target datalayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:16:32-n8:16-a0:16:16"
target triple = "msp430---elf"

1
test/CodeGen/MSP430/hwmult32.ll
View File

@ -1,4 +1,5 @@
; RUN: llc -O0 -mhwmult=32bit < %s | FileCheck %s
; RUN: llc -O0 -mattr=+hwmult32 < %s | FileCheck %s
target datalayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:16:32-n8:16-a0:16:16"
target triple = "msp430---elf"

1
test/CodeGen/MSP430/hwmultf5.ll
View File

@ -1,4 +1,5 @@
; RUN: llc -O0 -mhwmult=f5series < %s | FileCheck %s
; RUN: llc -O0 -mattr=+hwmultf5 < %s | FileCheck %s
target datalayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:16:32-n8:16-a0:16:16"
target triple = "msp430---elf"