* ia64.md (UNSPEC_SETF_EXP,UNSPEC_FR_SQRT_RECIP_APPROX): New constants.

	* ia64.md (UNSPEC_SETF_EXP,UNSPEC_FR_SQRT_RECIP_APPROX): New constants.
	(*sqrt_approx): New instruction pattern for approximate square roots.
	(*setf_exp_xf): New instruction pattern for exponentiation.
	(*maddxf4_alts_truncsf): New instruction pattern for truncation.
	(sqrtsf2_internal_thr): New define_and_split implementing
	throughput-optimized inline calculation of SFmode square root.
	(sqrtdf2_internal_thr): Likewise for DFmode.
	(sqrtxf2_internal_thr): Likewise for XFmode.
	(sqrtsf2, sqrtdf2, sqrtxf2): New expanders to choose between
	latency- and throughput-optimized square root algorithms.
	* ia64.h (MASK_INLINE_SQRT_LAT, MASK_INLINE_SQRT_THR,
	TARGET_INLINE_SQRT_LAT, TARGET_INLINE_SQRT_THR, TARGET_INLINE_SQRT):
	New macros.
	(TARGET_SWITCHES): Add -minline-sqrt-min-latency and
	-minline-sqrt-max-throughput.
	* ia64.c (ia64_override_options): If both -minline-sqrt-min-latency
	and -minline-sqrt-max-throughput are given, notify the user
	that both options cannot be used simultaneously.
	If -minline-sqrt-min-latency is given, notify the user that
	this mode is not yet implemented.
	(rtx_needs_barrier): Reformat initial comment to obey
	72-character width limit.  Support UNSPEC_SETF_EXP and
	UNSPEC_FR_SQRT_RECIP_APPROX.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@73027 138bc75d-0d04-0410-961f-82ee72b054a4