Preliminary testing shows significant performance wins by not using these
instructions.

llvm-svn: 99436

--- Reverse-merging r98679 into 'lib/Target/ARM/ARMInstrVFP.td':
U    lib/Target/ARM/ARMInstrVFP.td

llvm-svn: 99049

--- Reverse-merging r98889 into '.':
U    lib/Target/ARM/ARMInstrNEON.td
U    lib/Target/ARM/ARMISelLowering.h
U    lib/Target/ARM/ARMInstrInfo.td
U    lib/Target/ARM/ARMInstrVFP.td
U    lib/Target/ARM/ARMISelLowering.cpp
U    lib/Target/ARM/ARMInstrFormats.td

llvm-svn: 99010

llvm-svn: 98889

llvm-svn: 98888

This is for the disassembly work.

There are cases where this is not possible, for example, A8.6.53 LDM Encoding T1.
In such case, we'll use an adhoc approach to deduce the Opcode programmatically.

llvm-svn: 98679

llvm-svn: 98648

llvm-svn: 98502

base register updating load/store-multiple instructions.

llvm-svn: 98427

writebacks to the address register.  This gets rid of the hack that the
first register on the list was the magic writeback register operand.  There
was an implicit constraint that if that operand was not reg0 it had to match
the base register operand.  The post-RA scheduler's antidependency breaker
did not understand that constraint and sometimes changed one without the
other.  This also fixes Radar 7495976 and should help the verifier work
better for ARM code.

There are now new ld/st instructions explicit writeback operands and explicit
constraints that tie those registers together.

llvm-svn: 98409

example, this:

(set DPR:$dst, (fsub (fneg (fmul DPR:$a, DPR:$b)), DPR:$dstin))

is ambiguous because DPR contains both f64 and v2f32.  tblgen
currently accidentally picks f64 because it's first in the 
regclass.

llvm-svn: 97955

llvm-svn: 97348

A8.6.297

llvm-svn: 95885

A8.6.335 & A8.6.336

llvm-svn: 95703

For disassembly only.

A8.6.300

llvm-svn: 95669

The 'R' suffix means the to-integer operations use the rounding mode specified
by the FPSCR, encoded as Inst{7} = 0.

A8.6.295

llvm-svn: 95584

llvm-svn: 95560

A8.6.331 VMOV (between two ARM core registers and two single-precision registers)

llvm-svn: 95548

llvm-svn: 95397

bit (Inst{22}) and the M bit (Inst{5}) should be left unspecified.  For binary
format instructions, Inst{6} and Inst{4} need to specified for proper decodings.

llvm-svn: 94855

llvm-svn: 89723

llvm-svn: 89700

llvm-svn: 89478

llvm-svn: 87054

llvm-svn: 86706

llvm-svn: 86548

llvm-svn: 86494

llvm-svn: 85410

llvm-svn: 85362

llvm-svn: 85186

ld / st pairs, etc.

llvm-svn: 83197

Change ld/st multiples to explicitly model the writeback to base register. This fixes most of the -ldstopti-before-sched2 regressions.

llvm-svn: 83191

llvm-svn: 82788

llvm-svn: 82483

llvm-svn: 78604

Add parameter to pattern classes to enable an itinerary to be specified for instructions. For now just use the existing itineraries or NoItinerary.

llvm-svn: 78321

llvm-svn: 78101

llvm-svn: 78085

Initial support for single-precision FP using NEON. Added "neonfp" attribute to enable. Added patterns for some binary FP operations.

llvm-svn: 78081

llvm-svn: 76390