Merge remote-tracking branch 'pmaydell/tags/pull-target-arm-20140107' into staging

Merge remote-tracking branch 'pmaydell/tags/pull-target-arm-20140107' into staging

target-arm queue:
 * further A64 decoder patches, including enabling the aarch64-linux-user
   target; this includes full floating point support. Neon is not yet
   supported.
 * cadence UART model fixes.
 * some minor bug fixes and cleanups.
 * all the softfloat fixes required by the new A64 instructions;
   several of these will also be used by PPC.

* pmaydell/tags/pull-target-arm-20140107: (61 commits)
  target-arm: A64: Add support for FCVT between half, single and double
  target-arm: A64: Add 1-source 32-to-32 and 64-to-64 FP instructions
  target-arm: A64: Add floating-point<->integer conversion instructions
  target-arm: A64: Add floating-point<->fixed-point instructions
  target-arm: A64: Add extra VFP fixed point conversion helpers
  target-arm: Ignore most exceptions from scalbn when doing fixpoint conversion
  target-arm: Rename A32 VFP conversion helpers
  target-arm: Prepare VFP_CONV_FIX helpers for A64 uses
  softfloat: Add support for ties-away rounding
  softfloat: Refactor code handling various rounding modes
  softfloat: Add float16 <=> float64 conversion functions
  softfloat: Factor out RoundAndPackFloat16 and NormalizeFloat16Subnormal
  softfloat: Provide complete set of accessors for fp state
  softfloat: Fix float64_to_uint32_round_to_zero
  softfloat: Fix float64_to_uint32
  softfloat: Fix float64_to_uint64_round_to_zero
  softfloat: Add float32_to_uint64()
  softfloat: Fix factor 2 error for scalbn on denormal inputs
  softfloat: Only raise Invalid when conversions to int are out of range
  softfloat: Fix float64_to_uint64
  ...

Conflicts:
	target-arm/cpu.h

aliguori: resolved trivial conflict

Signed-off-by: Anthony Liguori <aliguori@amazon.com>