From c16c63bb99a820721467df46ad97a948c1e520c6 Mon Sep 17 00:00:00 2001
From: Ian Bolton <ian.bolton@arm.com>
Date: Thu, 22 Nov 2012 15:50:30 +0000
Subject: [PATCH] Implement bswaphi2 with rev16 (AArch64)

From-SVN: r193729
---
 gcc/ChangeLog                                  |  4 ++++
 gcc/config/aarch64/aarch64.md                  |  9 +++++++++
 gcc/testsuite/ChangeLog                        |  5 +++++
 .../gcc.target/aarch64/builtin-bswap-1.c       | 18 ++++++++++++++++++
 .../gcc.target/aarch64/builtin-bswap-2.c       | 18 ++++++++++++++++++
 5 files changed, 54 insertions(+)
 create mode 100644 gcc/testsuite/gcc.target/aarch64/builtin-bswap-1.c
 create mode 100644 gcc/testsuite/gcc.target/aarch64/builtin-bswap-2.c

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 63cb4f5cc2b..d0ede900e09 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2012-11-22  Ian Bolton  <ian.bolton@arm.com>
+
+	* config/aarch64/aarch64.md (bswaphi2): New pattern.
+
 2012-11-22  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR sanitizer/55379
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index 5c96c8925da..17f024fa40f 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -2312,6 +2312,15 @@
    (set_attr "mode" "<MODE>")]
 )
 
+(define_insn "bswaphi2"
+  [(set (match_operand:HI 0 "register_operand" "=r")
+        (bswap:HI (match_operand:HI 1 "register_operand" "r")))]
+  ""
+  "rev16\\t%w0, %w1"
+  [(set_attr "v8type" "rev")
+   (set_attr "mode" "HI")]
+)
+
 ;; -------------------------------------------------------------------
 ;; Floating-point intrinsics
 ;; -------------------------------------------------------------------
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 382affd8d12..788266ffcee 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2012-11-22  Ian Bolton  <ian.bolton@arm.com>
+
+	* gcc.target/aarch64/builtin-bswap-1.c: New test.
+	* gcc.target/aarch64/builtin-bswap-2.c: New test.
+
 2012-11-22  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/55432
diff --git a/gcc/testsuite/gcc.target/aarch64/builtin-bswap-1.c b/gcc/testsuite/gcc.target/aarch64/builtin-bswap-1.c
new file mode 100644
index 00000000000..a6706e693e1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/builtin-bswap-1.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+/* { dg-final { scan-assembler-times "rev16\\t" 2 } }  */
+
+/* rev16 */
+short
+swaps16 (short x)
+{
+  return __builtin_bswap16 (x);
+}
+
+/* rev16 */
+unsigned short
+swapu16 (unsigned short x)
+{
+  return __builtin_bswap16 (x);
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/builtin-bswap-2.c b/gcc/testsuite/gcc.target/aarch64/builtin-bswap-2.c
new file mode 100644
index 00000000000..6018b483479
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/builtin-bswap-2.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+/* { dg-final { scan-assembler-times "rev16\\t" 2 } }  */
+
+/* rev16 */
+unsigned short
+swapu16_1 (unsigned short x)
+{
+  return (x << 8) | (x >> 8);
+}
+
+/* rev16 */
+unsigned short
+swapu16_2 (unsigned short x)
+{
+  return (x >> 8) | (x << 8);
+}
-- 
2.30.2