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, 58 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/mzero4.c b/gcc/testsuite/gcc.c-torture/execute/ieee/mzero4.c
new file mode 100644
index 000000000..0ede7ec95
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/ieee/mzero4.c
@@ -0,0 +1,58 @@
+/* Copyright (C) 2003  Free Software Foundation.
+   by Roger Sayle <roger@eyesopen.com>, derived from mzero3.c
+
+   Constant folding of sin(-0.0), tan(-0.0) and atan(-0.0) should
+   all return -0.0, for both double and float forms.  */
+
+void abort (void);
+typedef __SIZE_TYPE__ size_t;
+extern int memcmp (const void *, const void *, size_t);
+
+double sin (double);
+double tan (double);
+double atan (double);
+
+float sinf (float);
+float tanf (float);
+float atanf (float);
+
+void expectd (double, double);
+void expectf (float, float);
+
+void
+expectd (double value, double expected)
+{
+  if (value != expected
+      || memcmp ((void *)&value, (void *) &expected, sizeof (double)) != 0)
+    abort ();
+}
+
+void
+expectf (float value, float expected)
+{
+  if (value != expected
+      || memcmp ((void *)&value, (void *) &expected, sizeof (float)) != 0)
+    abort ();
+}
+
+int main ()
+{
+  expectd (sin (0.0), 0.0);
+  expectd (tan (0.0), 0.0);
+  expectd (atan (0.0), 0.0);
+
+  expectd (sin (-0.0), -0.0);
+  expectd (tan (-0.0), -0.0);
+  expectd (atan (-0.0), -0.0);
+
+  expectf (sinf (0.0f), 0.0f);
+  expectf (tanf (0.0f), 0.0f);
+  expectf (atanf (0.0f), 0.0f);
+
+  expectf (sinf (-0.0f), -0.0f);
+  expectf (tanf (-0.0f), -0.0f);
+  expectf (atanf (-0.0f), -0.0f);
+
+  return 0;
+}
+