[PATCH v3 3/3] test/bitcount: add bitcount tests

[Tyler Retzlaff]

basic unit test of following functions

    rte_clz32
    rte_clz64
    rte_ctz32
    rte_ctz64

Signed-off-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
---
 app/test/meson.build     |  2 ++
 app/test/test_bitcount.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+)
 create mode 100644 app/test/test_bitcount.c

diff --git a/app/test/meson.build b/app/test/meson.build
index f34d19e..d1277bc 100644
--- a/app/test/meson.build
+++ b/app/test/meson.build
@@ -13,6 +13,7 @@ test_sources = files(
         'test_alarm.c',
         'test_atomic.c',
         'test_barrier.c',
+        'test_bitcount.c',
         'test_bitops.c',
         'test_bitmap.c',
         'test_bpf.c',
@@ -160,6 +161,7 @@ test_deps += ['bus_pci', 'bus_vdev']
 fast_tests = [
         ['acl_autotest', true, true],
         ['atomic_autotest', false, true],
+        ['bitcount_autotest', true, true],
         ['bitmap_autotest', true, true],
         ['bpf_autotest', true, true],
         ['bpf_convert_autotest', true, true],
diff --git a/app/test/test_bitcount.c b/app/test/test_bitcount.c
new file mode 100644
index 0000000..36eb05c
--- /dev/null
+++ b/app/test/test_bitcount.c
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (C) 2022 Microsoft Corporation
+ */
+
+#include <string.h>
+
+#include <rte_bitops.h>
+#include <rte_debug.h>
+
+#include "test.h"
+
+RTE_LOG_REGISTER(bitcount_logtype_test, test.bitcount, INFO);
+
+static int
+test_clz32(void)
+{
+	uint32_t v = 1;
+	RTE_TEST_ASSERT(rte_clz32(v) == sizeof(v) * CHAR_BIT - 1,
+	    "Unexpected count.");
+
+	return 0;
+}
+
+static int
+test_clz64(void)
+{
+	uint64_t v = 1;
+	RTE_TEST_ASSERT(rte_clz64(v) == sizeof(v) * CHAR_BIT - 1,
+	    "Unexpected count.");
+
+	return 0;
+}
+
+static int
+test_ctz32(void)
+{
+	uint32_t v = 2;
+	RTE_TEST_ASSERT(rte_ctz32(v) == 1, "Unexpected count.");
+
+	return 0;
+}
+
+static int
+test_ctz64(void)
+{
+	uint64_t v = 2;
+	RTE_TEST_ASSERT(rte_ctz64(v) == 1, "Unexpected count.");
+
+	return 0;
+}
+
+static struct unit_test_suite bitcount_test_suite = {
+	.suite_name = "bitcount autotest",
+	.setup = NULL,
+	.teardown = NULL,
+	.unit_test_cases = {
+		TEST_CASE(test_clz32),
+		TEST_CASE(test_clz64),
+		TEST_CASE(test_ctz32),
+		TEST_CASE(test_ctz64),
+		TEST_CASES_END()
+	}
+};
+
+static int
+test_bitcount(void)
+{
+	return unit_test_suite_runner(&bitcount_test_suite);
+}
+
+REGISTER_TEST_COMMAND(bitcount_autotest, test_bitcount);
-- 
1.8.3.1