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Diffstat (limited to 'lib/Target/PowerPC/PPCInstrInfo.cpp')
-rw-r--r--lib/Target/PowerPC/PPCInstrInfo.cpp86
1 files changed, 65 insertions, 21 deletions
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index ffb5cc8757f25..fb16700a5e177 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -2433,7 +2433,7 @@ bool PPCInstrInfo::convertToImmediateForm(MachineInstr &MI,
int64_t MB = MI.getOperand(3).getImm();
APInt InVal(Opc == PPC::RLDICL ? 64 : 32, SExtImm, true);
InVal = InVal.rotl(SH);
- uint64_t Mask = (1LU << (63 - MB + 1)) - 1;
+ uint64_t Mask = (1LLU << (63 - MB + 1)) - 1;
InVal &= Mask;
// Can't replace negative values with an LI as that will sign-extend
// and not clear the left bits. If we're setting the CR bit, we will use
@@ -2457,8 +2457,8 @@ bool PPCInstrInfo::convertToImmediateForm(MachineInstr &MI,
int64_t ME = MI.getOperand(4).getImm();
APInt InVal(32, SExtImm, true);
InVal = InVal.rotl(SH);
- // Set the bits ( MB + 32 ) to ( ME + 32 ).
- uint64_t Mask = ((1 << (32 - MB)) - 1) & ~((1 << (31 - ME)) - 1);
+ // Set the bits ( MB + 32 ) to ( ME + 32 ).
+ uint64_t Mask = ((1LLU << (32 - MB)) - 1) & ~((1LLU << (31 - ME)) - 1);
InVal &= Mask;
// Can't replace negative values with an LI as that will sign-extend
// and not clear the left bits. If we're setting the CR bit, we will use
@@ -2527,6 +2527,7 @@ bool PPCInstrInfo::instrHasImmForm(const MachineInstr &MI,
III.ConstantOpNo = 2;
III.ImmWidth = 16;
III.ImmMustBeMultipleOf = 1;
+ III.TruncateImmTo = 0;
switch (Opc) {
default: return false;
case PPC::ADD4:
@@ -2600,10 +2601,6 @@ bool PPCInstrInfo::instrHasImmForm(const MachineInstr &MI,
case PPC::RLWNM8:
case PPC::RLWNMo:
case PPC::RLWNM8o:
- case PPC::RLDCL:
- case PPC::RLDCLo:
- case PPC::RLDCR:
- case PPC::RLDCRo:
case PPC::SLW:
case PPC::SLW8:
case PPC::SLWo:
@@ -2614,29 +2611,26 @@ bool PPCInstrInfo::instrHasImmForm(const MachineInstr &MI,
case PPC::SRW8o:
case PPC::SRAW:
case PPC::SRAWo:
- case PPC::SLD:
- case PPC::SLDo:
- case PPC::SRD:
- case PPC::SRDo:
- case PPC::SRAD:
- case PPC::SRADo:
III.SignedImm = false;
III.ZeroIsSpecialOrig = 0;
III.ZeroIsSpecialNew = 0;
III.IsCommutative = false;
// This isn't actually true, but the instructions ignore any of the
// upper bits, so any immediate loaded with an LI is acceptable.
+ // This does not apply to shift right algebraic because a value
+ // out of range will produce a -1/0.
III.ImmWidth = 16;
+ if (Opc == PPC::RLWNM || Opc == PPC::RLWNM8 ||
+ Opc == PPC::RLWNMo || Opc == PPC::RLWNM8o)
+ III.TruncateImmTo = 5;
+ else
+ III.TruncateImmTo = 6;
switch(Opc) {
default: llvm_unreachable("Unknown opcode");
case PPC::RLWNM: III.ImmOpcode = PPC::RLWINM; break;
case PPC::RLWNM8: III.ImmOpcode = PPC::RLWINM8; break;
case PPC::RLWNMo: III.ImmOpcode = PPC::RLWINMo; break;
case PPC::RLWNM8o: III.ImmOpcode = PPC::RLWINM8o; break;
- case PPC::RLDCL: III.ImmOpcode = PPC::RLDICL; break;
- case PPC::RLDCLo: III.ImmOpcode = PPC::RLDICLo; break;
- case PPC::RLDCR: III.ImmOpcode = PPC::RLDICR; break;
- case PPC::RLDCRo: III.ImmOpcode = PPC::RLDICRo; break;
case PPC::SLW: III.ImmOpcode = PPC::RLWINM; break;
case PPC::SLW8: III.ImmOpcode = PPC::RLWINM8; break;
case PPC::SLWo: III.ImmOpcode = PPC::RLWINMo; break;
@@ -2645,14 +2639,62 @@ bool PPCInstrInfo::instrHasImmForm(const MachineInstr &MI,
case PPC::SRW8: III.ImmOpcode = PPC::RLWINM8; break;
case PPC::SRWo: III.ImmOpcode = PPC::RLWINMo; break;
case PPC::SRW8o: III.ImmOpcode = PPC::RLWINM8o; break;
- case PPC::SRAW: III.ImmOpcode = PPC::SRAWI; break;
- case PPC::SRAWo: III.ImmOpcode = PPC::SRAWIo; break;
+ case PPC::SRAW:
+ III.ImmWidth = 5;
+ III.TruncateImmTo = 0;
+ III.ImmOpcode = PPC::SRAWI;
+ break;
+ case PPC::SRAWo:
+ III.ImmWidth = 5;
+ III.TruncateImmTo = 0;
+ III.ImmOpcode = PPC::SRAWIo;
+ break;
+ }
+ break;
+ case PPC::RLDCL:
+ case PPC::RLDCLo:
+ case PPC::RLDCR:
+ case PPC::RLDCRo:
+ case PPC::SLD:
+ case PPC::SLDo:
+ case PPC::SRD:
+ case PPC::SRDo:
+ case PPC::SRAD:
+ case PPC::SRADo:
+ III.SignedImm = false;
+ III.ZeroIsSpecialOrig = 0;
+ III.ZeroIsSpecialNew = 0;
+ III.IsCommutative = false;
+ // This isn't actually true, but the instructions ignore any of the
+ // upper bits, so any immediate loaded with an LI is acceptable.
+ // This does not apply to shift right algebraic because a value
+ // out of range will produce a -1/0.
+ III.ImmWidth = 16;
+ if (Opc == PPC::RLDCL || Opc == PPC::RLDCLo ||
+ Opc == PPC::RLDCR || Opc == PPC::RLDCRo)
+ III.TruncateImmTo = 6;
+ else
+ III.TruncateImmTo = 7;
+ switch(Opc) {
+ default: llvm_unreachable("Unknown opcode");
+ case PPC::RLDCL: III.ImmOpcode = PPC::RLDICL; break;
+ case PPC::RLDCLo: III.ImmOpcode = PPC::RLDICLo; break;
+ case PPC::RLDCR: III.ImmOpcode = PPC::RLDICR; break;
+ case PPC::RLDCRo: III.ImmOpcode = PPC::RLDICRo; break;
case PPC::SLD: III.ImmOpcode = PPC::RLDICR; break;
case PPC::SLDo: III.ImmOpcode = PPC::RLDICRo; break;
case PPC::SRD: III.ImmOpcode = PPC::RLDICL; break;
case PPC::SRDo: III.ImmOpcode = PPC::RLDICLo; break;
- case PPC::SRAD: III.ImmOpcode = PPC::SRADI; break;
- case PPC::SRADo: III.ImmOpcode = PPC::SRADIo; break;
+ case PPC::SRAD:
+ III.ImmWidth = 6;
+ III.TruncateImmTo = 0;
+ III.ImmOpcode = PPC::SRADI;
+ break;
+ case PPC::SRADo:
+ III.ImmWidth = 6;
+ III.TruncateImmTo = 0;
+ III.ImmOpcode = PPC::SRADIo;
+ break;
}
break;
// Loads and stores:
@@ -2866,6 +2908,8 @@ bool PPCInstrInfo::transformToImmForm(MachineInstr &MI, const ImmInstrInfo &III,
return false;
if (Imm % III.ImmMustBeMultipleOf)
return false;
+ if (III.TruncateImmTo)
+ Imm &= ((1 << III.TruncateImmTo) - 1);
if (III.SignedImm) {
APInt ActualValue(64, Imm, true);
if (!ActualValue.isSignedIntN(III.ImmWidth))
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-12 21:45:25 +0000