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Remove 256bit to 128bit cast. 2010-06-23 H.J. Lu <hongjiu.lu@intel.com> * config/i386/i386.c (bdesc_args): Replace CODE_FOR_avx_si_si256, CODE_FOR_avx_ps_ps256 and CODE_FOR_avx_pd_pd256 with CODE_FOR_vec_extract_lo_v8si, CODE_FOR_vec_extract_lo_v8sf and CODE_FOR_vec_extract_lo_v4df. * config/i386/sse.md (vec_extract_lo_<AVX256MODE4P:mode>): Changed to define_insn_and_split. (vec_extract_lo_<AVX256MODE8P:mode>): Likewise. (vec_extract_lo_v16hi): Likewise. (vec_extract_lo_v32qi): Likewise. (avx_<avxmodesuffixp><avxmodesuffix>_<avxmodesuffixp>): Likewise. (avx_<avxmodesuffixp>_<avxmodesuffixp><avxmodesuffix>): Removed. From-SVN: r161279
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