[AArch64] Add support for floating-point vcond.

[James Greenhalgh]

Hi,

The AArch64 port has support for integer vcond, but did not have
support for floating-point vcond.

This patch adds this support and enables check_effective_target_vect_cond
in the testsuite.

Regression tested on aarch64-none-elf with no regressions.

Is this OK to commit?

Thanks,
James Greenhalgh

---
gcc/

2013-01-08  James Greenhalgh  <james.greenhalgh@arm.com>

	* config/aarch64/aarch64-simd.md
	(aarch64_simd_bsl<mode>_internal): Add floating-point modes.
	(aarch64_simd_bsl): Likewise.
	(aarch64_vcond_internal<mode>): Likewise.
	(vcond<mode><mode>): Likewise.
	(aarch64_cm<cmp><mode>): Fix constraints, add new modes.
	* config/aarch64/iterators.md (V_cmp_result): Add V2DF.

gcc/testsuite/

2013-01-08  James Greenhalgh  <james.greenhalgh@arm.com>

	* gcc/testsuite/gcc.target/aarch64/vect-fcm-eq-d.c: New.
	* gcc/testsuite/gcc.target/aarch64/vect-fcm-eq-f.c: Likewise.
	* gcc/testsuite/gcc.target/aarch64/vect-fcm-ge-d.c: Likewise.
	* gcc/testsuite/gcc.target/aarch64/vect-fcm-ge-f.c: Likewise.
	* gcc/testsuite/gcc.target/aarch64/vect-fcm-gt-d.c: Likewise.
	* gcc/testsuite/gcc.target/aarch64/vect-fcm-gt-f.c: Likewise.
	* gcc/testsuite/gcc.target/aarch64/vect-fcm.x: Likewise.
	* gcc/testsuite/lib/target-supports.exp
	(check_effective_target_vect_cond): Enable for AArch64.
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