util/tests: add basic unit tests for bitset

The last test here currently fails as there is a bug in bitset.h

Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/util/bitset_test.cpp

@@ -0,0 +1,129 @@
+/*
+ * Copyright © 2019 Red Hat
+ *
+ * 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 <gtest/gtest.h>
+#include "util/bitset.h"
+
+TEST(bitset, sizes)
+{
+   EXPECT_EQ(sizeof(BITSET_WORD), 4);
+
+   BITSET_DECLARE(mask32, 32);
+   BITSET_DECLARE(mask64, 64);
+   BITSET_DECLARE(mask128, 128);
+
+   EXPECT_EQ(sizeof(mask32), 4);
+   EXPECT_EQ(sizeof(mask64), 8);
+   EXPECT_EQ(sizeof(mask128), 16);
+}
+
+TEST(bitset, testsetclear)
+{
+   BITSET_DECLARE(mask128, 128);
+   BITSET_ZERO(mask128);
+
+   for (int i = 0; i < 128; i++) {
+      EXPECT_EQ(BITSET_TEST(mask128, i), false);
+      BITSET_SET(mask128, i);
+      EXPECT_EQ(BITSET_TEST(mask128, i), true);
+      BITSET_CLEAR(mask128, i);
+      EXPECT_EQ(BITSET_TEST(mask128, i), false);
+   }
+}
+
+TEST(bitset, testsetones)
+{
+   BITSET_DECLARE(mask128, 128);
+   BITSET_ONES(mask128);
+
+   EXPECT_EQ(BITSET_FFS(mask128), 1);
+
+   for (int i = 0; i < 128; i++) {
+      EXPECT_EQ(BITSET_TEST(mask128, i), true);
+      BITSET_CLEAR(mask128, i);
+      EXPECT_EQ(BITSET_TEST(mask128, i), false);
+      BITSET_SET(mask128, i);
+      EXPECT_EQ(BITSET_TEST(mask128, i), true);
+   }
+}
+
+TEST(bitset, testbasicrange)
+{
+   BITSET_DECLARE(mask128, 128);
+   BITSET_ZERO(mask128);
+
+   const int max_set = 15;
+   BITSET_SET_RANGE(mask128, 0, max_set);
+   EXPECT_EQ(BITSET_TEST_RANGE(mask128, 0, max_set), true);
+   EXPECT_EQ(BITSET_TEST_RANGE(mask128, max_set + 1, max_set + 15), false);
+   for (int i = 0; i < 128; i++) {
+      if (i <= max_set)
+         EXPECT_EQ(BITSET_TEST(mask128, i), true);
+      else
+         EXPECT_EQ(BITSET_TEST(mask128, i), false);
+   }
+   BITSET_CLEAR_RANGE(mask128, 0, max_set);
+   EXPECT_EQ(BITSET_TEST_RANGE(mask128, 0, max_set), false);
+   for (int i = 0; i < 128; i++) {
+      EXPECT_EQ(BITSET_TEST(mask128, i), false);
+   }
+}
+
+TEST(bitset, testbitsetffs)
+{
+   BITSET_DECLARE(mask128, 128);
+   BITSET_ZERO(mask128);
+
+   EXPECT_EQ(BITSET_FFS(mask128), 0);
+
+   BITSET_SET(mask128, 14);
+   EXPECT_EQ(BITSET_FFS(mask128), 15);
+
+   BITSET_SET(mask128, 28);
+   EXPECT_EQ(BITSET_FFS(mask128), 15);
+
+   BITSET_CLEAR(mask128, 14);
+   EXPECT_EQ(BITSET_FFS(mask128), 29);
+
+   BITSET_SET_RANGE(mask128, 14, 18);
+   EXPECT_EQ(BITSET_FFS(mask128), 15);
+}
+
+TEST(bitset, testrangebits)
+{
+   BITSET_DECLARE(mask128, 128);
+   BITSET_ZERO(mask128);
+
+   BITSET_SET_RANGE(mask128, 0, 31);
+   BITSET_SET_RANGE(mask128, 32, 63);
+   BITSET_SET_RANGE(mask128, 64, 95);
+   BITSET_SET_RANGE(mask128, 96, 127);
+
+   EXPECT_EQ(BITSET_TEST_RANGE(mask128, 0, 31), true);
+   EXPECT_EQ(BITSET_TEST_RANGE(mask128, 32, 63), true);
+   EXPECT_EQ(BITSET_TEST_RANGE(mask128, 64, 95), true);
+   EXPECT_EQ(BITSET_TEST_RANGE(mask128, 96, 127), true);
+   for (int i = 0; i < 128; i++) {
+      EXPECT_EQ(BITSET_TEST(mask128, i), true);
+   }
+}

src/util/meson.build

@@ -195,6 +195,18 @@ if with_tests
     suite : ['util'],
   )
 
+  test(
+    'bitset',
+    executable(
+       'bitset_test',
+       files('bitset_test.cpp'),
+       include_directories : inc_common,
+       dependencies : [dep_thread, dep_dl, idep_gtest],
+       link_with : libmesa_util,
+     ),
+     suite : ['util'],
+  )
+
   subdir('tests/fast_idiv_by_const')
   subdir('tests/hash_table')
   subdir('tests/string_buffer')