[AArch64] Fix cost for Q register moves

2014-09-12  Wilco Dijkstra  <wdijkstr@arm.com>

  * gcc/config/aarch64/aarch64.c (aarch64_register_move_cost): Fix Q register
  move handling.
  (generic_regmove_cost): Undo raised FP2FP move cost as Q register moves are
  now handled correctly.

From-SVN: r215207

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 37202e8c87cf9c32c8ff760b2f824c0062af31f9..b10f285bcd712ec8d70c9ea567bf86eb2d2c184c 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2014-09-12  Wilco Dijkstra  <wilco.dijkstra@arm.com>
+
+       * config/aarch64/aarch64.c (aarch64_register_move_cost): Fix Q register
+       move handling.
+       (generic_regmove_cost): Undo raised FP2FP move cost as Q register moves
+       are now handled correctly.
+
 2014-09-12  Wilco Dijkstra  <wilco.dijkstra@arm.com>
 
        * config/aarch64/aarch64.c (aarch64_register_move_cost): Add cost

diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 6f21fd9239bbf6325729ce59bb2bf708ee8a9faa..73ddb0db98b24b7710df0d301bfcfb45a8e6fc78 100644 (file)
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -215,10 +215,7 @@ static const struct cpu_regmove_cost generic_regmove_cost =
   NAMED_PARAM (GP2GP, 1),
   NAMED_PARAM (GP2FP, 2),
   NAMED_PARAM (FP2GP, 2),
-  /* We currently do not provide direct support for TFmode Q->Q move.
-     Therefore we need to raise the cost above 2 in order to have
-     reload handle the situation.  */
-  NAMED_PARAM (FP2FP, 4)
+  NAMED_PARAM (FP2FP, 2)
 };
 
 /* Generic costs for vector insn classes.  */
@@ -5961,7 +5958,7 @@ aarch64_register_move_cost (enum machine_mode mode,
      secondary reload.  A general register is used as a scratch to move
      the upper DI value and the lower DI value is moved directly,
      hence the cost is the sum of three moves. */
-  if (! TARGET_SIMD && GET_MODE_SIZE (mode) == 128)
+  if (! TARGET_SIMD && GET_MODE_SIZE (mode) == 16)
     return regmove_cost->GP2FP + regmove_cost->FP2GP + regmove_cost->FP2FP;
 
   return regmove_cost->FP2FP;