| commit | 6d35d1e60c2be9612b64eda7194b1131ab7d8d2d | |
| author | David Green <david.green@arm.com> | |
| Tue, 3 Sep 2019 10:53:07 +0000 (3 10:53 +0000) | ||
| committer | David Green <david.green@arm.com> | |
| Tue, 3 Sep 2019 10:53:07 +0000 (3 10:53 +0000) | ||
| tree | cfea8c2acb1d9cf2c5d9dbbbfcbf4fcce8444877 | treesnapshot (tar.gz zip) |
| parent | 080a37afd8a3c36daf6948aa5bd83ad1528988fb | commitdiff |
[ARM] Generate 8.1-m CSINC, CSNEG and CSINV instructions.
Arm 8.1-M adds a number of related CSEL instructions, including CSINC, CSNEG and CSINV. These choose between two values given the content in CPSR and a condition, performing an increment, negation or inverse of the false value.
This adds some selection for them, either from constant values or patterns. It does not include CSEL directly, which is currently not always making code better. It is still useful, but we will have to check more carefully where it should and shouldn't be used.
Code by Ranjeet Singh and Simon Tatham, with some modifications from me.
Differential revision: https://reviews.llvm.org/D66483
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@370739 91177308-0d34-0410-b5e6-96231b3b80d8
Arm 8.1-M adds a number of related CSEL instructions, including CSINC, CSNEG and CSINV. These choose between two values given the content in CPSR and a condition, performing an increment, negation or inverse of the false value.
This adds some selection for them, either from constant values or patterns. It does not include CSEL directly, which is currently not always making code better. It is still useful, but we will have to check more carefully where it should and shouldn't be used.
Code by Ranjeet Singh and Simon Tatham, with some modifications from me.
Differential revision: https://reviews.llvm.org/D66483
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@370739 91177308-0d34-0410-b5e6-96231b3b80d8
24 files changed: