[PATCH, AArch64] Add vabs_s64 intrinsic

[Ian Bolton]

This patch implements the following intrinsic:

  int64x1_t vabs_s64 (int64x1 a)

It uses __builtin_llabs(), which will lead to "abs Dn, Dm" being generated
for
this now that my other patch has been committed.

Test case added to scalar_intrinsics.c.


OK for trunk?

Cheers,
Ian



2013-07-12  Ian Bolton  <ian.bolton@arm.com>

gcc/
	* config/aarch64/arm_neon.h (vabs_s64): New function.

testsuite/
	* gcc.target/aarch64/scalar_intrinsics.c (test_vabs_s64): Added new
test.
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