altivec.md (mulv8hi3): Explicitly generate vmulesh and vmulosh rather than call gen_vec_widen_smult_*.

gcc:

2014-01-15  Bill Schmidt  <wschmidt@vnet.linux.ibm.com>

	* config/rs6000/altivec.md (mulv8hi3): Explicitly generate vmulesh
	and vmulosh rather than call gen_vec_widen_smult_*.
	(vec_widen_umult_even_v16qi): Test VECTOR_ELT_ORDER_BIG rather
	than BYTES_BIG_ENDIAN to determine use of even or odd instruction.
	(vec_widen_smult_even_v16qi): Likewise.
	(vec_widen_umult_even_v8hi): Likewise.
	(vec_widen_smult_even_v8hi): Likewise.
	(vec_widen_umult_odd_v16qi): Likewise.
	(vec_widen_smult_odd_v16qi): Likewise.
	(vec_widen_umult_odd_v8hi): Likewise.
	(vec_widen_smult_odd_v8hi): Likewise.
	(vec_widen_umult_hi_v16qi): Explicitly generate vmuleub and
	vmuloub rather than call gen_vec_widen_umult_*.
	(vec_widen_umult_lo_v16qi): Likewise.
	(vec_widen_smult_hi_v16qi): Explicitly generate vmulesb and
	vmulosb rather than call gen_vec_widen_smult_*.
	(vec_widen_smult_lo_v16qi): Likewise.
	(vec_widen_umult_hi_v8hi): Explicitly generate vmuleuh and vmulouh
	rather than call gen_vec_widen_umult_*.
	(vec_widen_umult_lo_v8hi): Likewise.
	(vec_widen_smult_hi_v8hi): Explicitly gnerate vmulesh and vmulosh
	rather than call gen_vec_widen_smult_*.
	(vec_widen_smult_lo_v8hi): Likewise.

gcc/testsuite:

2014-01-15  Bill Schmidt  <wschmidt@vnet.linux.ibm.com>

	* gcc.dg/vmx/mult-even-odd.c: New.
	* gcc.dg/vmx/mult-even-odd-be-order.c: New.

From-SVN: r206641