aarch64: Implement ACLE Data Intrinsics

aarch64: Implement ACLE Data Intrinsics

This patch adds support for the ACLE Data Intrinsics to the AArch64 port.

gcc/ChangeLog:

2022-07-25  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* config/aarch64/aarch64.md (rbit<mode>2): Rename this ...
	(@aarch64_rbit<mode>): ... to this and change it in...
	(ffs<mode>2,ctz<mode>2): ... here.
	(@aarch64_rev16<mode>): New.
	* config/aarch64/aarch64-builtins.cc: (aarch64_builtins):
	Define the following enum AARCH64_REV16, AARCH64_REV16L,
	AARCH64_REV16LL, AARCH64_RBIT, AARCH64_RBITL, AARCH64_RBITLL.
	(aarch64_init_data_intrinsics): New.
	(aarch64_general_init_builtins): Add call to
	aarch64_init_data_intrinsics.
	(aarch64_expand_builtin_data_intrinsic): New.
	(aarch64_general_expand_builtin): Add call to
	aarch64_expand_builtin_data_intrinsic.
	* config/aarch64/arm_acle.h (__clz, __clzl, __clzll, __cls, __clsl,
	__clsll, __rbit, __rbitl, __rbitll, __rev, __revl, __revll, __rev16,
	__rev16l, __rev16ll, __ror, __rorl, __rorll, __revsh): New.

gcc/testsuite/ChangeLog:

2022-07-25  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* gcc.target/aarch64/acle/data-intrinsics.c: New test.

(cherry picked from commit eb966d393dfdfd2c80994e4bfcc0dddf85828a73)