From 54ea23da510328c1eabd5604b3e9d1f29ebdc8c8 Mon Sep 17 00:00:00 2001
From: Christian Gmeiner <christian.gmeiner@gmail.com>
Date: Wed, 12 May 2021 19:47:14 +0200
Subject: [PATCH] util/tests: add set bit range test

This simple test validates that it is possible to set bits
across word bounary.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
---
 src/util/bitset_test.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/util/bitset_test.cpp b/src/util/bitset_test.cpp
index 608251ec479..9fb9daa1538 100644
--- a/src/util/bitset_test.cpp
+++ b/src/util/bitset_test.cpp
@@ -381,3 +381,23 @@ TEST(bitset, test_shl_two_words)
    EXPECT_EQ(BITSET_TEST_RANGE(r, 0, 31), false);
    EXPECT_EQ(BITSET_TEST_RANGE(r, 32, 63), true);
 }
+
+TEST(bitset, test_setrange_across_word_boundary)
+{
+   BITSET_DECLARE(r, 128);
+   BITSET_ZERO(r);
+
+   BITSET_SET_RANGE(r, 62, 65);
+
+   EXPECT_EQ(BITSET_TEST_RANGE(r, 0, 31), false);
+   EXPECT_EQ(BITSET_TEST_RANGE(r, 32, 63), true);
+   EXPECT_EQ(BITSET_TEST_RANGE(r, 64, 95), true);
+   EXPECT_EQ(BITSET_TEST_RANGE(r, 96, 127), false);
+
+   EXPECT_EQ(BITSET_TEST(r, 61), false);
+
+   for (int i = 62; i <= 65; i++)
+      EXPECT_EQ(BITSET_TEST(r, i), true);
+
+   EXPECT_EQ(BITSET_TEST(r, 66), false);
+}