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, 38 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/i386/pr42549.c b/gcc/testsuite/gcc.target/i386/pr42549.c
new file mode 100644
index 000000000..733853cdc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr42549.c
@@ -0,0 +1,38 @@
+/* { dg-do run } */
+/* { dg-require-effective-target 3dnow } */
+/* { dg-options "-O2 -m3dnow" } */
+
+#include "mmx-3dnow-check.h"
+
+#include <mm3dnow.h>
+
+typedef union {
+  float f[2];
+  __m64 v;
+} vec_t;
+
+void __attribute__ ((noinline))
+Butterfly_3 (__m64 * D, __m64 SC)
+{
+  __m64 T, T1;
+
+  T = _m_pfmul (D[1], SC);
+  T1 = D[0];
+  D[0] = _m_pfadd (T1, T);
+  D[1] = _m_pfsub (T1, T);
+}
+
+static void
+mmx_3dnow_test (void)
+{
+  vec_t D[2] = { { .f = { 2.0f, 3.0f } },
+		 { .f = { 4.0f, 5.0f } } };
+
+  const vec_t SC = { .f = { 1.0f, 1.0f } };
+
+  Butterfly_3 (&D[0].v, SC.v);
+  _m_femms ();
+
+  if (D[1].f[0] != -2.0f || D[1].f[1] != -2.0f)
+    abort ();
+}