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* 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. From-SVN: r73027
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