[AArch64] Vectorise bswap[16,32,64]

	* config/aarch64/aarch64-builtins.c
	(aarch64_builtin_vectorized_function): Handle BUILT_IN_BSWAP16,
	BUILT_IN_BSWAP32, BUILT_IN_BSWAP64.
	* config/aarch64/aarch64-simd.md (bswap<mode>): New pattern.
	* config/aarch64/aarch64-simd-builtins.def: Define vector bswap
	builtins.
	* config/aarch64/iterator.md (VDQHSD): New mode iterator.
	(Vrevsuff): New mode attribute.

	* lib/target-supports.exp (check_effective_target_vect_bswap): New.
	* gcc.dg/vect/vect-bswap16: New test.
	* gcc.dg/vect/vect-bswap32: Likewise.
	* gcc.dg/vect/vect-bswap64: Likewise.

From-SVN: r209736

5 files changed, 157 insertions, 0 deletions

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 62b07f4..40df580 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2014-04-24  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	* lib/target-supports.exp (check_effective_target_vect_bswap): New.
+	* gcc.dg/vect/vect-bswap16: New test.
+	* gcc.dg/vect/vect-bswap32: Likewise.
+	* gcc.dg/vect/vect-bswap64: Likewise.
+
 2014-04-23  Jeff Law  <law@redhat.com>
 
 	PR tree-optimization/60902
diff --git a/gcc/testsuite/gcc.dg/vect/vect-bswap16.c b/gcc/testsuite/gcc.dg/vect/vect-bswap16.c
new file mode 100644
index 0000000..c562718
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-bswap16.c
@@ -0,0 +1,44 @@
+/* { dg-require-effective-target vect_bswap } */
+
+#include "tree-vect.h"
+
+#define N 128
+
+volatile int y = 0;
+
+static inline void
+vfoo16 (unsigned short int* a)
+{
+  int i = 0;
+  for (i = 0; i < N; ++i)
+    a[i] = __builtin_bswap16 (a[i]);
+}
+
+int
+main (void)
+{
+  unsigned short arr[N];
+  unsigned short expect[N];
+  int i;
+
+  for (i = 0; i < N; ++i)
+    {
+      arr[i] = i;
+      expect[i] = __builtin_bswap16 (i);
+      if (y) /* Avoid vectorisation.  */
+        abort ();
+    }
+
+  vfoo16 (arr);
+
+  for (i = 0; i < N; ++i)
+    {
+      if (arr[i] != expect[i])
+        abort ();
+    }
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */
diff --git a/gcc/testsuite/gcc.dg/vect/vect-bswap32.c b/gcc/testsuite/gcc.dg/vect/vect-bswap32.c
new file mode 100644
index 0000000..9596677
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-bswap32.c
@@ -0,0 +1,44 @@
+/* { dg-require-effective-target vect_bswap } */
+
+#include "tree-vect.h"
+
+#define N 128
+
+volatile int y = 0;
+
+static inline void
+vfoo32 (unsigned int* a)
+{
+  int i = 0;
+  for (i = 0; i < N; ++i)
+    a[i] = __builtin_bswap32 (a[i]);
+}
+
+int
+main (void)
+{
+  unsigned int arr[N];
+  unsigned int expect[N];
+  int i;
+
+  for (i = 0; i < N; ++i)
+    {
+      arr[i] = i;
+      expect[i] = __builtin_bswap32 (i);
+      if (y) /* Avoid vectorisation.  */
+        abort ();
+    }
+
+  vfoo32 (arr);
+
+  for (i = 0; i < N; ++i)
+    {
+      if (arr[i] != expect[i])
+        abort ();
+    }
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */
diff --git a/gcc/testsuite/gcc.dg/vect/vect-bswap64.c b/gcc/testsuite/gcc.dg/vect/vect-bswap64.c
new file mode 100644
index 0000000..088c8c6
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-bswap64.c
@@ -0,0 +1,44 @@
+/* { dg-require-effective-target vect_bswap } */
+
+#include "tree-vect.h"
+
+#define N 128
+
+volatile int y = 0;
+
+static inline void
+vfoo64 (unsigned long long* a)
+{
+  int i = 0;
+  for (i = 0; i < N; ++i)
+    a[i] = __builtin_bswap64 (a[i]);
+}
+
+int
+main (void)
+{
+  unsigned long long arr[N];
+  unsigned long long expect[N];
+  int i;
+
+  for (i = 0; i < N; ++i)
+    {
+      arr[i] = i;
+      expect[i] = __builtin_bswap64 (i);
+      if (y) /* Avoid vectorisation.  */
+        abort ();
+    }
+
+  vfoo64 (arr);
+
+  for (i = 0; i < N; ++i)
+    {
+      if (arr[i] != expect[i])
+        abort ();
+    }
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 541a428..badfac3 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -3271,6 +3271,24 @@ proc check_effective_target_vect_shift { } {
     return $et_vect_shift_saved
 }
 
+# Return 1 if the target supports vector bswap operations.
+
+proc check_effective_target_vect_bswap { } {
+    global et_vect_bswap_saved
+
+    if [info exists et_vect_bswap_saved] {
+	verbose "check_effective_target_vect_bswap: using cached result" 2
+    } else {
+	set et_vect_bswap_saved 0
+	if { [istarget aarch64*-*-*] } {
+	   set et_vect_bswap_saved 1
+	}
+    }
+
+    verbose "check_effective_target_vect_bswap: returning $et_vect_bswap_saved" 2
+    return $et_vect_bswap_saved
+}
+
 # Return 1 if the target supports hardware vector shift operation for char.
 
 proc check_effective_target_vect_shift_char { } {