altivec.md (mulv4si3): Ensure we generate vmulouh for both big and little endian.

2013-11-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/altivec.md (mulv4si3): Ensure we generate vmulouh
	for both big and little endian.
	(mulv8hi3): Swap input operands for merge high and merge low
	instructions for little endian.

From-SVN: r204440

gcc/ChangeLog

 2013-11-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
 
+	* config/rs6000/altivec.md (mulv4si3): Ensure we generate vmulouh
+	for both big and little endian.
+	(mulv8hi3): Swap input operands for merge high and merge low
+	instructions for little endian.
+
+2013-11-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+
 	* config/rs6000/altivec.md (vec_widen_umult_even_v16qi): Change
 	define_insn to define_expand that uses even patterns for big
 	endian and odd patterns for little endian.

gcc/config/rs6000/altivec.md

@@ -651,7 +651,7 @@
    convert_move (small_swap, swap, 0);
  
    low_product = gen_reg_rtx (V4SImode);
-   emit_insn (gen_vec_widen_umult_odd_v8hi (low_product, one, two));
+   emit_insn (gen_altivec_vmulouh (low_product, one, two));
  
    high_product = gen_reg_rtx (V4SImode);
    emit_insn (gen_altivec_vmsumuhm (high_product, one, small_swap, zero));
@@ -678,13 +678,18 @@
    emit_insn (gen_vec_widen_smult_even_v8hi (even, operands[1], operands[2]));
    emit_insn (gen_vec_widen_smult_odd_v8hi (odd, operands[1], operands[2]));
 
-   emit_insn (gen_altivec_vmrghw (high, even, odd));
-   emit_insn (gen_altivec_vmrglw (low, even, odd));
-
    if (BYTES_BIG_ENDIAN)
-     emit_insn (gen_altivec_vpkuwum (operands[0], high, low));
+     {
+       emit_insn (gen_altivec_vmrghw (high, even, odd));
+       emit_insn (gen_altivec_vmrglw (low, even, odd));
+       emit_insn (gen_altivec_vpkuwum (operands[0], high, low));
+     }
    else
-     emit_insn (gen_altivec_vpkuwum (operands[0], low, high));
+     {
+       emit_insn (gen_altivec_vmrghw (high, odd, even));
+       emit_insn (gen_altivec_vmrglw (low, odd, even));
+       emit_insn (gen_altivec_vpkuwum (operands[0], low, high));
+     } 
 
    DONE;
 }")