sse.md (V): Extended with wider modes.

sse.md (V): Extended with wider modes.

       * config/i386/sse.md (V): Extended with wider modes.
        (VF2): Ditto.
        (ssehalfvecmode): Ditto.
        (i128): Ditto.
        (ssepackfltmode): Ditto.
        (avx_vec_concat<mode>): Ditto.
        (V_256_512): New iterator.
        (VF2_512_256): Ditto.
        (si2dfmode): New attribute.
        (si2dfmodelower): Ditto.
        (sf2dfmode): Ditto.
        (concat_tg_mode): Ditto.
        (floatv4siv4df2): Changed to ...
        (float<si2dfmodelower><mode>2): This.
        (avx_cvtps2pd256): Changed to ...
        (<sse2_avx_avx512f>_cvtps2pd<avxsizesuffix>): This.
        (vec_pack_trunc_v4df): Changed to ...
        (vec_pack_trunc_<mode>): This.
        (avx_vpermil<mode>): Changed to ...
        (<sse2_avx_avx512f>_vpermil<mode>): This.
        (<fixsuffix>fix_truncv8dfv8si2): New.
        (vec_pack_sfix_trunc_v8df): Ditto.
        (avx512f_rndscale<mode>): Ditto.
        (avx512f_roundpd512): Ditto.
        (vec_pack_ufix_trunc_<mode>): Updated iterator.

Co-Authored-By: Andrey Turetskiy <andrey.turetskiy@intel.com>
Co-Authored-By: Anna Tikhonova <anna.tikhonova@intel.com>
Co-Authored-By: Ilya Tocar <ilya.tocar@intel.com>
Co-Authored-By: Ilya Verbin <ilya.verbin@intel.com>
Co-Authored-By: Kirill Yukhin <kirill.yukhin@intel.com>
Co-Authored-By: Maxim Kuznetsov <maxim.kuznetsov@intel.com>
Co-Authored-By: Michael Zolotukhin <michael.v.zolotukhin@intel.com>
Co-Authored-By: Sergey Lega <sergey.s.lega@intel.com>
From-SVN: r203431