(vec_widen_smult_hi, vec_widen_smult_lo): New.
* doc/c-tree.texi (VEC_LSHIFT_EXPR, VEC_RSHIFT_EXPR):
(VEC_WIDEN_MULT_HI_EXPR, VEC_WIDEN_MULT_LO_EXPR, VEC_UNPACK_HI_EXPR):
(VEC_UNPACK_LO_EXPR, VEC_PACK_MOD_EXPR, VEC_PACK_SAT_EXPR): New.
(vec_widen_smult_hi, vec_widen_smult_lo): New.
* doc/c-tree.texi (VEC_LSHIFT_EXPR, VEC_RSHIFT_EXPR):
(VEC_WIDEN_MULT_HI_EXPR, VEC_WIDEN_MULT_LO_EXPR, VEC_UNPACK_HI_EXPR):
(VEC_UNPACK_LO_EXPR, VEC_PACK_MOD_EXPR, VEC_PACK_SAT_EXPR): New.