[AArch64] Improve description of <F>CM instructions in RTL

[AArch64] Improve description of <F>CM instructions in RTL

gcc/
	* config/aarch64/aarch64-simd-builtins.def (cmhs): Rename to...
	(cmgeu): ...This.
	(cmhi): Rename to...
	(cmgtu): ...This.
	* config/aarch64/aarch64-simd.md
	(simd_mode): Add SF.
	(aarch64_vcond_internal): Use new names for unsigned comparison insns.
	(aarch64_cm<optab><mode>): Rewrite to not use UNSPECs.
	* config/aarch64/aarch64.md (*cstore<mode>_neg): Rename to...
	(cstore<mode>_neg): ...This.
	* config/aarch64/iterators.md
	(VALLF): new.
	(unspec): Remove UNSPEC_CM<EQ, LE, LT, GE, GT, HS, HI, TST>.
	(COMPARISONS): New.
	(UCOMPARISONS): Likewise.
	(optab): Add missing comparisons.
	(n_optab): New.
	(cmp_1): Likewise.
	(cmp_2): Likewise.
	(CMP): Likewise.
	(cmp): Remove.
	(VCMP_S): Likewise.
	(VCMP_U): Likewise.
	(V_cmp_result): Add DF, SF modes.
	(v_cmp_result): Likewise.
	(v): Likewise.
	(vmtype): Likewise.
	* config/aarch64/predicates.md (aarch64_reg_or_fp_zero): New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@198490 138bc75d-0d04-0410-961f-82ee72b054a4