[AArch64][PATCH 8/14] Support FP16 Adv.SIMD Across Lanes instructions.

[Matthew Wahab]

ARMv8.2 adds 16-bit floating point operations as an optional extension
to the floating point and Adv.SIMD support. This patch adds FP16
instructions to the group Adv.SIMD Across Lanes, making them available
when +simd+fp16 is enabled.

The instructions added are: FMAXNMV, FMAXV, FMINNMV and FMINV.

The general form for these instructions is
    <OP> <Hd>, <V>.<T>
    where T is 4h or 8h.

The new instructions valid make uses of the 8H and 4H that were
previously illegal. The patch adjusts a test for illegal uses of vector
types to take this into account.

Tested the series for aarch64-none-linux-gnu with cross-compiled
check-binutils and check-gas.

Ok for trunk?
Matthew

gas/testsuite/
2015-12-10  Matthew Wahab  <matthew.wahab@arm.com>

	* gas/aarch64/advsimd-fp16.d: Update expected output.
	* gas/aarch64/advsimd-fp16.s: Add tests for Adv.SIMD across lanes
	instructions.
         * gas/aarch64/illegal.d: Update expected output.
         * gas/aarch64/illegal.s: Replace test for illegal use of 'h'
	specifier.

opcodes/
2015-12-10  Matthew Wahab  <matthew.wahab@arm.com>

	* aarch64-asm-2.c: Regenerate.
	* aarch64-dis-2.c: Regenerate.
	* aarch64-opc-2.c: Regenerate.
	* aarch64-tbl.h (QL_XLANES_FP_H): New.
	(aarch64_opcode_table): Add fp16 versions of fmaxnmv, fmaxv,
	fminnmv, fminv to the Adv.SIMD across lanes group.

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