diff options
Diffstat (limited to 'lib/Target')
| -rw-r--r-- | lib/Target/PowerPC/PPCInstr64Bit.td | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCInstr64Bit.td b/lib/Target/PowerPC/PPCInstr64Bit.td index 5df735a..39778a5 100644 --- a/lib/Target/PowerPC/PPCInstr64Bit.td +++ b/lib/Target/PowerPC/PPCInstr64Bit.td @@ -269,6 +269,10 @@ let Pattern = [(set G8RC:$rT, readcyclecounter)] in def MFTB8 : XFXForm_1_ext<31, 339, 268, (outs G8RC:$rT), (ins), "mfspr $rT, 268", SprMFTB>, PPC970_DGroup_First, PPC970_Unit_FXU; +// Note that encoding mftb using mfspr is now the preferred form, +// and has been since at least ISA v2.03. The mftb instruction has +// now been phased out. Using mfspr, however, is known not to work on +// the POWER3. let Defs = [X1], Uses = [X1] in def DYNALLOC8 : Pseudo<(outs G8RC:$result), (ins G8RC:$negsize, memri:$fpsi),"", |