cris.h (TARGET_HAS_LZ, [...]): Defined to describe availability and behavior of CLZ.

cris.h (TARGET_HAS_LZ, [...]): Defined to describe availability and behavior of CLZ.

	* config/cris/cris.h (TARGET_HAS_LZ, CLZ_DEFINED_VALUE_AT_ZERO):
	Defined to describe availability and behavior of CLZ.
	* config/cris/cris.md (clzsi2): Implement using lz instruction.
	* config/cris/cris.opt: Tweak comment for "-metrax4".
	* config/cris/arit.c (LZ): When defined, define as __builtin_clz.
	* longlong.h [__CRIS__ && __CRIS_arch_version >= 3]
	(count_leading_zeros): Define.

Co-Authored-By: Hans-Peter Nilsson <hp@axis.com>
From-SVN: r128034