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[NFC][RISCV] Move getSEWLMULRatio function to header 

More uses of getSEWLMULRatio will be added in D130895.

Reviewed By: craig.topper, frasercrmck

Differential Revision: https://reviews.llvm.org/D135086
This commit is contained in:
Anton Sidorenko 2022-10-05 14:58:07 +01:00 committed by Fraser Cormack
parent 0d7e4d099e
commit 3e97e94237
3 changed files with 19 additions and 17 deletions
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12
llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.cpp
View File

@ -185,4 +185,16 @@ void RISCVVType::printVType(unsigned VType, raw_ostream &OS) {
OS << ", mu";
}
unsigned RISCVVType::getSEWLMULRatio(unsigned SEW, RISCVII::VLMUL VLMul) {
unsigned LMul;
bool Fractional;
std::tie(LMul, Fractional) = decodeVLMUL(VLMul);
// Convert LMul to a fixed point value with 3 fractional bits.
LMul = Fractional ? (8 / LMul) : (LMul * 8);
assert(SEW >= 8 && "Unexpected SEW value");
return (SEW * 8) / LMul;
}
} // namespace llvm

2
llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
View File

@ -455,6 +455,8 @@ inline static bool isMaskAgnostic(unsigned VType) { return VType & 0x80; }
void printVType(unsigned VType, raw_ostream &OS);
unsigned getSEWLMULRatio(unsigned SEW, RISCVII::VLMUL VLMul);
} // namespace RISCVVType
} // namespace llvm

22
llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
View File

@ -296,18 +296,6 @@ static bool isMaskRegOp(const MachineInstr &MI) {
return Log2SEW == 0;
}
static unsigned getSEWLMULRatio(unsigned SEW, RISCVII::VLMUL VLMul) {
unsigned LMul;
bool Fractional;
std::tie(LMul, Fractional) = RISCVVType::decodeVLMUL(VLMul);
// Convert LMul to a fixed point value with 3 fractional bits.
LMul = Fractional ? (8 / LMul) : (LMul * 8);
assert(SEW >= 8 && "Unexpected SEW value");
return (SEW * 8) / LMul;
}
/// Which subfields of VL or VTYPE have values we need to preserve?
struct DemandedFields {
bool VL = false;
@ -347,10 +335,10 @@ static bool areCompatibleVTYPEs(uint64_t VType1,
return false;
if (Used.SEWLMULRatio) {
auto Ratio1 = getSEWLMULRatio(RISCVVType::getSEW(VType1),
RISCVVType::getVLMUL(VType1));
auto Ratio2 = getSEWLMULRatio(RISCVVType::getSEW(VType2),
RISCVVType::getVLMUL(VType2));
auto Ratio1 = RISCVVType::getSEWLMULRatio(RISCVVType::getSEW(VType1),
RISCVVType::getVLMUL(VType1));
auto Ratio2 = RISCVVType::getSEWLMULRatio(RISCVVType::getSEW(VType2),
RISCVVType::getVLMUL(VType2));
if (Ratio1 != Ratio2)
return false;
}
@ -548,7 +536,7 @@ public:
unsigned getSEWLMULRatio() const {
assert(isValid() && !isUnknown() &&
"Can't use VTYPE for uninitialized or unknown");
return ::getSEWLMULRatio(SEW, VLMul);
return RISCVVType::getSEWLMULRatio(SEW, VLMul);
}
// Check if the VTYPE for these two VSETVLIInfos produce the same VLMAX.