[PATCH] RS6000 : Add support for vector conditionals

[Devang Patel <dpatel at apple dot com>]

My previous patches added vcond_gen_code optab for VEC_COND_EXPR.
This patch adds patterns and related functions for rs6000. All
functionality is added as new functions and new patterns. None
of the existing rs6000 functions are modified.

rs6000_emit_vector_cond_expr() is main function here. It is used
by new vcond* patterns. For selected existing patterns' indexes,
now constants are defined instead of hard coded numbers.

Bootstrapped and tested on powerpc-darwin.

OK ?
Thanks,
-
Devang

2004-09-15  Devang Patel  <dpatel@apple.com>

        * rs6000/altivec.md (UNSPEC_VCMPBFP, UNSPEC_VCMPEQUB, 
UNSPEC_VCMPEQUH,
        UNSPEC_VCMPEQUW, UNSPEC_VCMPGEFP, UNSPEC_VCMPGTUB, 
UNSPEC_VCMPGTSB,
        UNSPEC_VCMPGTUH, UNSPEC_VCMPGTSH, UNSPEC_VCMPGTUW, 
UNSPEC_VCMPGTSW,
        UNSPEC_VCMPGTFP, UNSPEC_VSEL4SI, UNSPEC_VSEL4SF, UNSPEC_VSEL8HI,
        UNSPEC_VSEL16QI, UNSPEC_VCOND_V4SI, UNSPEC_VCOND_V4SF, 
UNSPEC_VCOND_V8HI,
        UNSPEC_VCOND_V16QI): New constant defines.
        (vcondv4si, vcondv4sf, vcondv8hi, vcondv16qi): New patterns.
        * rs6000/rs6000-protos.h (rs6000_emit_vector_cond_expr): New 
function.
        * rs6000/rs6000.c (rs6000_emit_vector_cond_expr): New function.
        (get_vec_cmp_insn): Same.
        (get_vsel_insn): Same.
        (rs6000_emit_vector_compare): Same.
        (rs6000_emit_vector_select): Same.

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