Reviewed-by: Carl Worth <cwo...@cworth.org>
---
src/util/Makefile.am | 4 +-
src/util/roundeven_test.c | 140 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 143 insertions(+), 1 deletion(-)
create mode 100644 src/util/roundeven_test.c
diff --git a/src/util/Makefile.am b/src/util/Makefile.am
index ec49dc6..2e7542e 100644
--- a/src/util/Makefile.am
+++ b/src/util/Makefile.am
@@ -50,7 +50,9 @@ endif
libmesautil_la_LIBADD = $(SHA1_LIBS)
-check_PROGRAMS = u_atomic_test
+roundeven_test_LDADD = -lm
+
+check_PROGRAMS = u_atomic_test roundeven_test
TESTS = $(check_PROGRAMS)
BUILT_SOURCES = $(MESA_UTIL_GENERATED_FILES)
diff --git a/src/util/roundeven_test.c b/src/util/roundeven_test.c
new file mode 100644
index 0000000..7526db1
--- /dev/null
+++ b/src/util/roundeven_test.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <math.h>
+
+#include "macros.h"
+#include "rounding.h"
+
+int main(int argc, char *argv[])
+{
+ const struct {
+ float input, expected;
+ } float_data[] = {
+ { 0.0, 0.0 },
+ { nextafterf(0.5, 0.0), 0.0 },
+ { 0.5, 0.0 },
+ { nextafterf(0.5, 1.0), 1.0 },
+ { 1.0, 1.0 },
+ { nextafterf(1.5, 1.0), 1.0 },
+ { 1.5, 2.0 },
+ { nextafterf(1.5, 2.0), 2.0 },
+ { 2.0, 2.0 },
+ { nextafterf(2.5, 2.0), 2.0 },
+ { 2.5, 2.0 },
+ { nextafterf(2.5, 3.0), 3.0 },
+ };
+
+ const struct {
+ double input, expected;
+ } double_data[] = {
+ { 0.0, 0.0 },
+ { nextafter(0.5, 0.0), 0.0 },
+ { 0.5, 0.0 },
+ { nextafter(0.5, 1.0), 1.0 },
+ { 1.0, 1.0 },
+ { nextafter(1.5, 1.0), 1.0 },
+ { 1.5, 2.0 },
+ { nextafter(1.5, 2.0), 2.0 },
+ { 2.0, 2.0 },
+ { nextafter(2.5, 2.0), 2.0 },
+ { 2.5, 2.0 },
+ { nextafter(2.5, 3.0), 3.0 },
+ };
+
+ bool failed = false;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(float_data); i++) {
+ float output = _mesa_roundevenf(float_data[i].input);
+ if (memcmp(&float_data[i].expected, &output, sizeof(float))) {
+ fprintf(stderr, "%d float: expected %f (%a) from "
+ "_mesa_roundevenf(%f (%a)) but got %f (%a)\n",
+ i,
+ float_data[i].expected,
+ float_data[i].expected,
+ float_data[i].input,
+ float_data[i].input,
+ output,
+ output);
+ failed = true;
+ }
+ }
+
+ /* Test negated values */
+ for (i = 0; i < ARRAY_SIZE(float_data); i++) {
+ float output = _mesa_roundevenf(-float_data[i].input);
+ float negated_expected = -float_data[i].expected;
+ if (memcmp(&negated_expected, &output, sizeof(float))) {
+ fprintf(stderr, "%d float: expected %f (%a) from "
+ "_mesa_roundevenf(%f (%a)) but got %f (%a)\n",
+ i,
+ negated_expected,
+ negated_expected,
+ -float_data[i].input,
+ -float_data[i].input,
+ output,
+ output);
+ failed = true;
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(double_data); i++) {
+ double output = _mesa_roundeven(double_data[i].input);
+ if (memcmp(&double_data[i].expected, &output, sizeof(double))) {
+ fprintf(stderr, "%d double: expected %f (%a) from "
+ "_mesa_roundeven(%f (%a)) but got %f (%a)\n",
+ i,
+ double_data[i].expected,
+ double_data[i].expected,
+ double_data[i].input,
+ double_data[i].input,
+ output,
+ output);
+ failed = true;
+ }
+ }
+
+ /* Test negated values */
+ for (i = 0; i < ARRAY_SIZE(double_data); i++) {
+ double output = _mesa_roundeven(-double_data[i].input);
+ double negated_expected = -double_data[i].expected;
+ if (memcmp(&negated_expected, &output, sizeof(double))) {
+ fprintf(stderr, "%d double: expected %f (%a) from "
+ "_mesa_roundeven(%f (%a)) but got %f (%a)\n",
+ i,
+ negated_expected,
+ negated_expected,
+ -double_data[i].input,
+ -double_data[i].input,
+ output,
+ output);
+ failed = true;
+ }
+ }
+
+ return failed;
+}
--
2.0.5
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