neon.md (neon_vget_lanev2di): Handle big-endian targets.

2015-08-04  Christophe Lyon  <christophe.lyon@linaro.org>

	* config/arm/neon.md (neon_vget_lanev2di): Handle big-endian
	targets.

From-SVN: r226574

gcc/ChangeLog

+2015-08-04  Christophe Lyon  <christophe.lyon@linaro.org>
+
+	* config/arm/neon.md (neon_vget_lanev2di): Handle big-endian
+	targets.
+
 2015-08-04  Nathan Sidwell  <nathan@codesourcery.com>
 
 	* config/nvptx/nvptx.h (struct nvptx_pseudo_info): Delete.

gcc/config/arm/neon.md

@@ -2731,7 +2731,22 @@
    (match_operand:SI 2 "immediate_operand" "")]
   "TARGET_NEON"
 {
-  int lane = INTVAL (operands[2]);
+  int lane;
+
+if (BYTES_BIG_ENDIAN)
+    {
+      /* The intrinsics are defined in terms of a model where the
+	 element ordering in memory is vldm order, whereas the generic
+	 RTL is defined in terms of a model where the element ordering
+	 in memory is array order.  Convert the lane number to conform
+	 to this model.  */
+      unsigned int elt = INTVAL (operands[2]);
+      unsigned int reg_nelts = 2;
+      elt ^= reg_nelts - 1;
+      operands[2] = GEN_INT (elt);
+    }
+
+  lane = INTVAL (operands[2]);
   gcc_assert ((lane ==0) || (lane == 1));
   emit_move_insn (operands[0], lane == 0
 				? gen_lowpart (DImode, operands[1])