diff options
| 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 | e7b9d6cf4548f09973f4b31bda2d775e0d6fd631 (patch) | |
| tree | a5b33cf6b08aaf461ab7f0c8e7541da483d8c5b6 /test/MC/Mips/mips3 | |
| parent | 18913db07a603b95b1459ec9112db794dad10fb8 (diff) | |
[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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244579 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/MC/Mips/mips3')
| -rw-r--r-- | test/MC/Mips/mips3/valid.s | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/test/MC/Mips/mips3/valid.s b/test/MC/Mips/mips3/valid.s index 1c878c97d158..cf51753712e6 100644 --- a/test/MC/Mips/mips3/valid.s +++ b/test/MC/Mips/mips3/valid.s @@ -142,10 +142,10 @@ a: mflo $s1 mov.d $f20,$f14 mov.s $f2,$f27 - move $a0,$a3 - move $s5,$a0 - move $s8,$a0 - move $25,$a2 + move $a0,$a3 # CHECK: move $4, $7 # encoding: [0x00,0xe0,0x20,0x25] + move $s5,$a0 # CHECK: move $21, $4 # encoding: [0x00,0x80,0xa8,0x25] + move $s8,$a0 # CHECK: move $fp, $4 # encoding: [0x00,0x80,0xf0,0x25] + move $25,$a2 # CHECK: move $25, $6 # encoding: [0x00,0xc0,0xc8,0x25] mtc1 $s8,$f9 mthi $s1 mtlo $sp |