llvm-project

Commit Graph

Author	SHA1	Message	Date
Craig Topper	cada9f2275	[AVX-512] Add support for commuting VPERMT2(B/W/D/Q/PS/PD) to/from VPERMI2(B/W/D/Q/PS/PD). Summary: The index and one of the table operands can be swapped by changing the opcode to the other version. Neither of these operands are the one that can load from memory so this can't be used to increase memory folding opportunities. We need to handle the unmasked forms and the kz forms. Since the load operand isn't being commuted we can commute the load and broadcast instructions too. Reviewers: igorb, delena, Ayal, Farhana, RKSimon Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D25652 llvm-svn: 287621	2016-11-22 04:57:34 +00:00
Craig Topper	c1db0db864	[AVX-512] Add tests to show opportunities for commuting vpermi2/vpermt2 instructions. Commuting will be added in a future commit. llvm-svn: 284808	2016-10-21 05:55:40 +00:00

Author

SHA1

Message

Date

Craig Topper

cada9f2275

[AVX-512] Add support for commuting VPERMT2(B/W/D/Q/PS/PD) to/from VPERMI2(B/W/D/Q/PS/PD).

Summary:
The index and one of the table operands can be swapped by changing the opcode to the other version. Neither of these operands are the one that can load from memory so this can't be used to increase memory folding opportunities.

We need to handle the unmasked forms and the kz forms. Since the load operand isn't being commuted we can commute the load and broadcast instructions too.

Reviewers: igorb, delena, Ayal, Farhana, RKSimon

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D25652

llvm-svn: 287621

2016-11-22 04:57:34 +00:00

Craig Topper

c1db0db864

[AVX-512] Add tests to show opportunities for commuting vpermi2/vpermt2 instructions.

Commuting will be added in a future commit.

llvm-svn: 284808

2016-10-21 05:55:40 +00:00

2 Commits