obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 55 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/powerpc/optimize-bswapsi-2.c b/gcc/testsuite/gcc.target/powerpc/optimize-bswapsi-2.c
new file mode 100644
index 000000000..34cc8236f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/optimize-bswapsi-2.c
@@ -0,0 +1,55 @@
+/* { dg-require-effective-target stdint_types } */
+/* { dg-options "-O2 -mcpu=power5" } */
+
+#include <stdint.h>
+
+/* This is a clone of gcc-dg/optimize-bswapsi-1.c, redone to use load and stores
+   to test whether lwbrx/stwbrx is generated for normal power systems.  */
+
+#define __const_swab32(x) ((uint32_t)(				      \
+        (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) |            \
+        (((uint32_t)(x) & (uint32_t)0x0000ff00UL) <<  8) |            \
+        (((uint32_t)(x) & (uint32_t)0x00ff0000UL) >>  8) |            \
+        (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24)))
+
+/* This byte swap implementation is used by the Linux kernel and the
+   GNU C library.  */
+
+uint32_t
+swap32_a_load (uint32_t *in)
+{
+  return __const_swab32 (*in);
+}
+
+/* The OpenSSH byte swap implementation.  */
+uint32_t
+swap32_b_load (uint32_t *in)
+{
+  uint32_t a;
+
+  a = (*in << 16) | (*in >> 16);
+  a = ((a & 0x00ff00ff) << 8) | ((a & 0xff00ff00) >> 8);
+
+  return a;
+}
+
+void
+swap32_a_store (uint32_t *out, uint32_t in)
+{
+  *out = __const_swab32 (in);
+}
+
+/* The OpenSSH byte swap implementation.  */
+void
+swap32_b_store (uint32_t *out, uint32_t in)
+{
+  uint32_t a;
+
+  a = (in << 16) | (in >> 16);
+  a = ((a & 0x00ff00ff) << 8) | ((a & 0xff00ff00) >> 8);
+
+  *out = a;
+}
+
+/* { dg-final { scan-assembler-times "lwbrx" 2 } } */
+/* { dg-final { scan-assembler-times "stwbrx" 2 } } */