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| author | Vasileios Kalintiris <Vasileios.Kalintiris@imgtec.com> | 2015-08-11 08:56:25 +0000 |
|---|---|---|
| committer | Vasileios Kalintiris <Vasileios.Kalintiris@imgtec.com> | 2015-08-11 08:56:25 +0000 |
| commit | 1c78ca6a09cec862d6aad04e820dae98b71be9fc (patch) | |
| tree | ef6def2a0475fbea2672cf161260dc2830857755 /llvm/unittests | |
| parent | 7337ee23d8ee9864d6b5f4140aaa56cf68388361 (diff) | |
| download | bcm5719-llvm-1c78ca6a09cec862d6aad04e820dae98b71be9fc.tar.gz bcm5719-llvm-1c78ca6a09cec862d6aad04e820dae98b71be9fc.zip | |
[mips] Remap move as or.
Summary:
This patch remaps the assembly idiom 'move' to 'or' instead of 'daddu' or
'addu'. The use of addu/daddu instead of or as move was highlighted as a
performance issue during the analysis of a recent 64bit design. Originally
move was encoded as 'or' by binutils but was changed for the r10k cpu family
due to their pipeline which had 2 arithmetic units and a single logical unit,
and so could issue multiple (d)addu based moves at the same time but only 1
logical move.
This patch preserves the disassembly behaviour so that disassembling a old style
(d)addu move still appears as move, but assembling move always gives an or
Patch by Simon Dardis.
Reviewers: vkalintiris
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D11796
llvm-svn: 244579
Diffstat (limited to 'llvm/unittests')
0 files changed, 0 insertions, 0 deletions
