Hi Guys,

  I am slowly going through the gcc testsuite, fixing bugs that it
  exposes in the AArch64 simulator.  The attached patch adds support for
  a couple of missing instructions - namely scalar NEG and vector MUL,
  and adds some improvements to the tracing functions to help track down
  problems.  I also found that the floating point load and store
  functions were not working because of aliasing problems when casting
  between real and integer values.  So the patch also makes use of the
  FRegister union to ensure that the correct values are read to and from
  memory.

Cheers
  Nick

sim/aarch64/ChangeLog
2016-03-18  Nick Clifton  <nickc@redhat.com>

	* cpustate.c: Remove spurious spaces from TRACE strings.
	Print hex equivalents of floats and doubles.
	Check element number against array size when accessing vector
	registers.
	* memory.c: Trace memory reads when --trace-memory is enabled.
	Remove float and double load and store functions.
	* memory.h (aarch64_get_mem_float): Delete prototype.
	(aarch64_get_mem_double): Likewise.
	(aarch64_set_mem_float): Likewise.
	(aarch64_set_mem_double): Likewise.
	* simulator (IS_SET): Always return either 0 or 1.
	(IS_CLEAR): Likewise.
	(fldrs_pcrel): Load and store floats using 32-bit memory accesses
	and doubles using 64-bit memory accesses.
	(fldrd_pcrel, fldrs_wb, fldrs_abs, fldrs_scale_ext): Likewise.
	(fldrd_wb, fldrd_abs, fsturs, fsturd, fldurs, fldurd): Likewise.
	(fstrs_abs, fstrs_wb, fstrs_scale_ext, fstrd_abs): Likewise.
	(fstrd_wb, fstrd_scale_ext, store_pair_float): Likewise.
	(store_pair_double, load_pair_float, load_pair_double): Likewise.
	(do_vec_MUL_by_element): New function.
	(do_vec_op2): Call do_vec_MUL_by_element.
	(do_scalar_NEG): New function.
	(do_double_add): Call do_scalar_NEG.