search for: cmp_unresw

Hi all, I'm trying to figure out how to add the instructions required for llvm.atomic.cmp.swap.i32 on PowerPC. I figured out LWARX (patch attached) but the other two (CMP_UNRESw and STWCX) require multiple instructions: let Defs = [CR0] in { def STWCX : Pseudo<(outs), (ins GPRC:$rS, memrr:$dst, i32imm:$label), "stwcx. $rS, $dst\n\tbne- La${label}_entry\nLa${label}_exit:", [(PPCstcx GPRC:$rS, xoaddr:$dst, imm:$label...

Hello, Gary > I'm trying to figure out how to add the instructions required for > llvm.atomic.cmp.swap.i32 on PowerPC. I figured out LWARX (patch > attached) Applied, thanks! > but the other two (CMP_UNRESw and STWCX) require multiple > instructions: > > let Defs = [CR0] in { > def STWCX : Pseudo<(outs), (ins GPRC:$rS, memrr:$dst, i32imm:$label), > "stwcx. $rS, $dst\n\tbne- La${label}_entry\nLa${label}_exit:", > [(PPCstcx GPR...

On Jun 27, 2008, at 8:27 AM, Gary Benson wrote: > def CMP_UNRESw : Pseudo<(outs), (ins GPRC:$rA, GPRC:$rB, i32imm: > $label), > "cmpw $rA, $rB\n\tbne- La${label}_exit", > [(PPCcmp_unres GPRC:$rA, GPRC:$rB, imm: > $label)]>; > } > > ...and I can't figure out the syntax...

Chris Lattner wrote: > On Jun 27, 2008, at 8:27 AM, Gary Benson wrote: > > def CMP_UNRESw : Pseudo<(outs), (ins GPRC:$rA, GPRC:$rB, i32imm: > > $label), > > "cmpw $rA, $rB\n\tbne- La${label}_exit", > > [(PPCcmp_unres GPRC:$rA, GPRC:$rB, imm: > > $label)]>; > > } > > > > ...an...

...node. But it is then expanded into instructions that can span multiple basic blocks. See PPCTargetLowering::EmitInstrWithCustomInserter(). Evan On Jun 30, 2008, at 6:10 AM, Gary Benson wrote: > Chris Lattner wrote: >> On Jun 27, 2008, at 8:27 AM, Gary Benson wrote: >>> def CMP_UNRESw : Pseudo<(outs), (ins GPRC:$rA, GPRC:$rB, i32imm: >>> $label), >>> "cmpw $rA, $rB\n\tbne- La${label}_exit", >>> [(PPCcmp_unres GPRC:$rA, GPRC:$rB, imm: >>> $label)]>; >>> } >>> &g...

...[(PPCstcx GPRC:$rS, xoaddr:$dst, imm:$label)]>; +// Instructions to support atomic operations +def LWARX : XForm_1<31, 20, (outs GPRC:$rD), (ins memrr:$src), + "lwarx $rD, $src", LdStLWARX, + [(set GPRC:$rD, (PPClarx xoaddr:$src))]>; -def CMP_UNRESw : Pseudo<(outs), (ins GPRC:$rA, GPRC:$rB, i32imm:$label), - "cmpw $rA, $rB\n\tbne- La${label}_exit", - [(PPCcmp_unres GPRC:$rA, GPRC:$rB, imm:$label)]>; -def CMP_UNRESwi : Pseudo<(outs), (ins GPRC:$rA, s16imm:$imm, i32imm:$label), -...

PPCTargetLowering::EmitInstrWithCustomInserter has a reference to the current MachineFunction for other purposes. Can you use MachineFunction::getRegInfo instead? Dan On Jul 8, 2008, at 1:56 PM, Gary Benson wrote: > Would it be acceptable to change MachineInstr::getRegInfo from private > to public so I can use it from > PPCTargetLowering::EmitInstrWithCustomInserter? > >

...[(PPCstcx GPRC:$rS, xoaddr:$dst, imm:$label)]>; +// Instructions to support atomic operations +def LWARX : XForm_1<31, 20, (outs GPRC:$rD), (ins memrr:$src), + "lwarx $rD, $src", LdStLWARX, + [(set GPRC:$rD, (PPClarx xoaddr:$src))]>; -def CMP_UNRESw : Pseudo<(outs), (ins GPRC:$rA, GPRC:$rB, i32imm:$label), - "cmpw $rA, $rB\n\tbne- La${label}_exit", - [(PPCcmp_unres GPRC:$rA, GPRC:$rB, imm:$label)]>; -def CMP_UNRESwi : Pseudo<(outs), (ins GPRC:$rA, s16imm:$imm, i32imm:$label), -...

Hi Gary, This does not patch cleanly for me (PPCISelLowering.cpp). Can you prepare a updated patch? Thanks, Evan On Jul 10, 2008, at 11:45 AM, Gary Benson wrote: > Cool, that worked. New patch attached... > > Cheers, > Gary > > Evan Cheng wrote: >> Just cast both values to const TargetRegisterClass*. >> >> Evan >> >> On Jul 10, 2008, at 7:36

Just cast both values to const TargetRegisterClass*. Evan On Jul 10, 2008, at 7:36 AM, Gary Benson wrote: > Evan Cheng wrote: >> How about? >> >> const TargetRegisterClass *RC = is64Bit ? &PPC:GPRCRegClass : >> &PPC:G8RCRegClass; >> unsigned TmpReg = RegInfo.createVirtualRegister(RC); > > I tried something like that yesterday: > > const

Evan Cheng wrote: > How about? > > const TargetRegisterClass *RC = is64Bit ? &PPC:GPRCRegClass : > &PPC:G8RCRegClass; > unsigned TmpReg = RegInfo.createVirtualRegister(RC); I tried something like that yesterday: const TargetRegisterClass *RC = is64bit ? &PPC::GPRCRegClass : &PPC::G8RCRegClass; but I kept getting this error no matter how I arranged it:

...[(PPCstcx GPRC:$rS, xoaddr:$dst, imm:$label)]>; +// Instructions to support atomic operations +def LWARX : XForm_1<31, 20, (outs GPRC:$rD), (ins memrr:$src), + "lwarx $rD, $src", LdStLWARX, + [(set GPRC:$rD, (PPClarx xoaddr:$src))]>; -def CMP_UNRESw : Pseudo<(outs), (ins GPRC:$rA, GPRC:$rB, i32imm:$label), - "cmpw $rA, $rB\n\tbne- La${label}_exit", - [(PPCcmp_unres GPRC:$rA, GPRC:$rB, imm:$label)]>; -def CMP_UNRESwi : Pseudo<(outs), (ins GPRC:$rA, s16imm:$imm, i32imm:$label), -...

Would it be acceptable to change MachineInstr::getRegInfo from private to public so I can use it from PPCTargetLowering::EmitInstrWithCustomInserter? Cheers, Gary Evan Cheng wrote: > Look for createVirtualRegister. These are examples in > PPCISelLowering.cpp. > > Evan > On Jul 8, 2008, at 8:24 AM, Gary Benson wrote: > > > Hi Evan, > > > > Evan Cheng wrote:

...[(PPCstcx GPRC:$rS, xoaddr:$dst, imm:$label)]>; +// Instructions to support atomic operations +def LWARX : XForm_1<31, 20, (outs GPRC:$rD), (ins memrr:$src), + "lwarx $rD, $src", LdStLWARX, + [(set GPRC:$rD, (PPClarx xoaddr:$src))]>; -def CMP_UNRESw : Pseudo<(outs), (ins GPRC:$rA, GPRC:$rB, i32imm:$label), - "cmpw $rA, $rB\n\tbne- La${label}_exit", - [(PPCcmp_unres GPRC:$rA, GPRC:$rB, imm:$label)]>; -def CMP_UNRESwi : Pseudo<(outs), (ins GPRC:$rA, s16imm:$imm, i32imm:$label), -...