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Copying the list on a discussion of potentially general interest.... From: Kaylor, Andrew Sent: Friday, November 03, 2017 1:11 PM To: 'Ding, Wei' <Wei.Ding2 at amd.com>; Sumner, Brian <Brian.Sumner at amd.com>; Arsenault, Matthew <Matthew.Arsenault at amd.com> Subject: RE: clarification needed for the constrained fp implementation. Hi Wei, I've been meaning to write something up for discussion on the LLVM Dev list about this. I ho...

...dev > <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>>: > > Copying the list on a discussion of potentially general interest…. > > *From:* Kaylor, Andrew > *Sent:* Friday, November 03, 2017 1:11 PM > *To:* 'Ding, Wei' <Wei.Ding2 at amd.com <mailto:Wei.Ding2 at amd.com>>; > Sumner, Brian <Brian.Sumner at amd.com > <mailto:Brian.Sumner at amd.com>>; Arsenault, Matthew > <Matthew.Arsenault at amd.com <mailto:Matthew.Arsenault at amd.com>> > *Subject:* RE: clarificat...

...Finkel <hfinkel at anl.gov <mailto:hfinkel at anl.gov>>; Richard Smith <richard at metafoo.co.uk <mailto:richard at metafoo.co.uk>>; bob.huemmer at sas.com <mailto:bob.huemmer at sas.com>; bumblebritches57 at gmail.com <mailto:bumblebritches57 at gmail.com>; wei.ding2 at amd.com <mailto:wei.ding2 at amd.com>; cfe-dev at lists.llvm.org <mailto:cfe-dev at lists.llvm.org>; llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> > Subject: Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? > > Andrew Kay...

...Hal Finkel <hfinkel at anl.gov<mailto:hfinkel at anl.gov>>; Richard Smith <richard at metafoo.co.uk<mailto:richard at metafoo.co.uk>>; bob.huemmer at sas.com<mailto:bob.huemmer at sas.com>; bumblebritches57 at gmail.com<mailto:bumblebritches57 at gmail.com>; wei.ding2 at amd.com<mailto:wei.ding2 at amd.com>; cfe-dev at lists.llvm.org<mailto:cfe-dev at lists.llvm.org>; llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>> Subject: Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? Andrew Kaylor wrote: >In...

...chard at metafoo.co.uk > <mailto:richard at metafoo.co.uk>>; Kaylor, Andrew > <andrew.kaylor at intel.com <mailto:andrew.kaylor at intel.com>>; Marcus > Johnson <bumblebritches57 at gmail.com > <mailto:bumblebritches57 at gmail.com>>; wei.ding2 at amd.com > <mailto:wei.ding2 at amd.com>; Bob Huemmer <bob.huemmer at sas.com > <mailto:bob.huemmer at sas.com>> > Subject: Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? > > On Thu, Aug 31, 2017 at 05:03:17PM -0500, Hal Finkel via cf...

Andrew Kaylor wrote: >In general, the current "strict FP" handling stops at instruction >selection. At the MachineIR level we don't currently have a mechanism >to prevent inappropriate optimizations based on floating point >constraints, or indeed to convey such constraints to the backend. >Implicit register use modeling may provide some restriction on some

...Neal [mailto:kpn at neutralgood.org] Sent: Monday, January 08, 2018 6:41 AM To: Hal Finkel via cfe-dev <cfe-dev at lists.llvm.org> Cc: Richard Smith <richard at metafoo.co.uk>; Kaylor, Andrew <andrew.kaylor at intel.com>; Marcus Johnson <bumblebritches57 at gmail.com>; wei.ding2 at amd.com; Bob Huemmer <bob.huemmer at sas.com> Subject: Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? On Thu, Aug 31, 2017 at 05:03:17PM -0500, Hal Finkel via cfe-dev wrote: > To be clear, we've had several extensive discussions about this, on and > off list,...

...ralgood.org] > Sent: Monday, January 08, 2018 6:41 AM > To: Hal Finkel via cfe-dev <cfe-dev at lists.llvm.org> > Cc: Richard Smith <richard at metafoo.co.uk>; Kaylor, Andrew < > andrew.kaylor at intel.com>; Marcus Johnson <bumblebritches57 at gmail.com>; > wei.ding2 at amd.com; Bob Huemmer <bob.huemmer at sas.com> > Subject: Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? > > On Thu, Aug 31, 2017 at 05:03:17PM -0500, Hal Finkel via cfe-dev wrote: > > To be clear, we've had several extensive discussions about this, on &g...

...ralgood.org] > Sent: Monday, January 08, 2018 6:41 AM > To: Hal Finkel via cfe-dev <cfe-dev at lists.llvm.org> > Cc: Richard Smith <richard at metafoo.co.uk>; Kaylor, Andrew < > andrew.kaylor at intel.com>; Marcus Johnson <bumblebritches57 at gmail.com>; > wei.ding2 at amd.com; Bob Huemmer <bob.huemmer at sas.com> > Subject: Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? > > On Thu, Aug 31, 2017 at 05:03:17PM -0500, Hal Finkel via cfe-dev wrote: > > To be clear, we've had several extensive discussions about this, on &g...

...eigand at de.ibm.com>] *Sent:* Tuesday, January 09, 2018 9:59 AM *To:* Kaylor, Andrew <andrew.kaylor at intel.com>; kpn at neutralgood.org *Cc:* Hal Finkel <hfinkel at anl.gov>; Richard Smith <richard at metafoo.co.uk>; bob.huemmer at sas.com; bumblebritches57 at gmail.com; wei.ding2 at amd.com; cfe-dev at lists.llvm.org; llvm-dev <llvm-dev at lists.llvm.org> *Subject:* Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? Andrew Kaylor wrote: >In general, the current "strict FP" handling stops at instruction >selection. At the MachineIR level we...

...o:Ulrich.Weigand at de.ibm.com] Sent: Tuesday, January 09, 2018 9:59 AM To: Kaylor, Andrew <andrew.kaylor at intel.com>; kpn at neutralgood.org Cc: Hal Finkel <hfinkel at anl.gov>; Richard Smith <richard at metafoo.co.uk>; bob.huemmer at sas.com; bumblebritches57 at gmail.com; wei.ding2 at amd.com; cfe-dev at lists.llvm.org; llvm-dev <llvm-dev at lists.llvm.org> Subject: Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? Andrew Kaylor wrote: >In general, the current "strict FP" handling stops at instruction >selection. At the MachineIR level we d...

...Sent: Tuesday, January 09, 2018 9:59 AM > To: Kaylor, Andrew <andrew.kaylor at intel.com>; kpn at neutralgood.org > Cc: Hal Finkel <hfinkel at anl.gov>; Richard Smith > <richard at metafoo.co.uk>; bob.huemmer at sas.com; > bumblebritches57 at gmail.com; wei.ding2 at amd.com; cfe-dev at lists.llvm.org; > llvm-dev <llvm-dev at lists.llvm.org> > Subject: Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? > > > Andrew Kaylor wrote: > >In general, the current "strict FP" handling stops at instruction &...

...Sent: Tuesday, January 09, 2018 8:05 AM To: via cfe-dev <cfe-dev at lists.llvm.org> Cc: Richard Smith <richard at metafoo.co.uk>; Kaylor, Andrew <andrew.kaylor at intel.com>; Nelson, Clark <clark.nelson at intel.com>; Marcus Johnson <bumblebritches57 at gmail.com>; wei.ding2 at amd.com; llvm-dev <llvm-dev at lists.llvm.org>; Hal Finkel <hfinkel at anl.gov>; Bob Huemmer <bob.huemmer at sas.com> Subject: Re: [cfe-dev] [llvm-dev] Why is #pragma STDC FENV_ACCESS not supported? > On 01/08/2018 07:06 PM, Richard Smith via llvm-dev wrote: > >...

...o:Ulrich.Weigand at de.ibm.com] Sent: Tuesday, January 09, 2018 9:59 AM To: Kaylor, Andrew <andrew.kaylor at intel.com>; kpn at neutralgood.org Cc: Hal Finkel <hfinkel at anl.gov>; Richard Smith <richard at metafoo.co.uk>; bob.huemmer at sas.com; bumblebritches57 at gmail.com; wei.ding2 at amd.com; cfe-dev at lists.llvm.org; llvm-dev <llvm-dev at lists.llvm.org> Subject: Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? Andrew Kaylor wrote: >In general, the current "strict FP" handling stops at instruction >selection. At the MachineIR level we...

...o:Ulrich.Weigand at de.ibm.com] Sent: Tuesday, January 09, 2018 9:59 AM To: Kaylor, Andrew <andrew.kaylor at intel.com>; kpn at neutralgood.org Cc: Hal Finkel <hfinkel at anl.gov>; Richard Smith <richard at metafoo.co.uk>; bob.huemmer at sas.com; bumblebritches57 at gmail.com; wei.ding2 at amd.com; cfe-dev at lists.llvm.org; llvm-dev <llvm-dev at lists.llvm.org> Subject: Re: [cfe-dev] Why is #pragma STDC FENV_ACCESS not supported? Andrew Kaylor wrote: >In general, the current "strict FP" handling stops at instruction >selection. At the MachineIR level we...