altivec.md: Fix argument swizzle in vec_doublel support...

gcc/ChangeLog:

2017-06-07  Carl Love  <cel@us.ibm.com>

	* config/rs6000/altivec.md: Fix argument swizzle in vec_doublel
	support, Generate	doublehv for signed int/float for BE case only.

From-SVN: r248996

gcc/ChangeLog

+2017-06-07  Carl Love  <cel@us.ibm.com>
+
+	* config/rs6000/altivec.md: Fix argument swizzle in vec_doublel
+	support, Generate	doublehv for signed int/float for BE case only.
+
 2017-06-07  Alexander Monakov  <amonakov@ispras.ru>
 
 	* doc/invoke.texi (mcx16): Rewrite.

gcc/config/rs6000/altivec.md

@@ -3003,8 +3003,8 @@
 					 operands[1], rtx_val));
 
       rtx_val = GEN_INT (8);
-      emit_insn (gen_vsx_xxsldwi_<mode> (rtx_tmp, operands[1],
-					 rtx_tmp, rtx_val));
+      emit_insn (gen_vsx_xxsldwi_<mode> (rtx_tmp, rtx_tmp,
+					 operands[1],rtx_val));
       emit_insn (gen_vsx_xvcv<VS_sxwsp>dp (operands[0], rtx_tmp));
     }
   else