1 files changed, 35 insertions, 0 deletions
diff --git a/test/test-fp_minusZerocases.c b/test/test-fp_minusZerocases.c
new file mode 100644
index 00000000..f821f2ab
--- /dev/null
+++ b/test/test-fp_minusZerocases.c
@@ -0,0 +1,35 @@
+/* test cases for floating point comparison transformations
+ * compile with -DFLOAT_TYPE=float
+ *          or  -DFLOAT_TYPE=double
+ *          or  -DFLOAT_TYPE="long double"
+ */
+
+#include <assert.h>
+#define _GNU_SOURCE
+#include <math.h>                           /* for NaNs and infinity values */
+
+int main() {
+
+  volatile FLOAT_TYPE a, b;
+
+  /* negative zero */
+  a = 1.0 / -(1.0 / 0.0);                                     /* negative 0 */
+  b = 0.0;                                                    /* positive 0 */
+  assert(!(a < b));
+  assert((a <= b));
+  assert(!(a > b));
+  assert((a >= b));
+  assert(!(a != b));
+  assert((a == b));
+
+  a = 1.0 / -(1.0 / 0.0);                                     /* negative 0 */
+  b = 1.0 / -(1.0 / 0.0);                                     /* negative 0 */
+  assert(!(a < b));
+  assert((a <= b));
+  assert(!(a > b));
+  assert((a >= b));
+  assert(!(a != b));
+  assert((a == b));
+
+}
+