Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
// SPDX-License-Identifier: MIT
|
|
/*
|
|
* Copyright 2022 Advanced Micro Devices, Inc.
|
|
*/
|
|
|
|
#include <kunit/test.h>
|
|
#include <drm/drm_fixed.h>
|
|
|
|
static void drm_test_sm2fixp(struct kunit *test)
|
|
{
|
|
KUNIT_EXPECT_EQ(test, 0x7fffffffffffffffll, ((1ull << 63) - 1));
|
|
|
|
/* 1 */
|
|
KUNIT_EXPECT_EQ(test, drm_int2fixp(1), drm_sm2fixp(1ull << DRM_FIXED_POINT));
|
|
|
|
/* -1 */
|
|
KUNIT_EXPECT_EQ(test, drm_int2fixp(-1),
|
|
drm_sm2fixp((1ull << 63) | (1ull << DRM_FIXED_POINT)));
|
|
|
|
/* 0.5 */
|
|
KUNIT_EXPECT_EQ(test, drm_fixp_from_fraction(1, 2),
|
|
drm_sm2fixp(1ull << (DRM_FIXED_POINT - 1)));
|
|
|
|
/* -0.5 */
|
|
KUNIT_EXPECT_EQ(test, drm_fixp_from_fraction(-1, 2),
|
|
drm_sm2fixp((1ull << 63) | (1ull << (DRM_FIXED_POINT - 1))));
|
|
}
|
|
|
|
static void drm_test_int2fixp(struct kunit *test)
|
|
{
|
|
/* 1 */
|
|
KUNIT_EXPECT_EQ(test, 1ll << 32, drm_int2fixp(1));
|
|
|
|
/* -1 */
|
|
KUNIT_EXPECT_EQ(test, -(1ll << 32), drm_int2fixp(-1));
|
|
|
|
/* 1 + (-1) = 0 */
|
|
KUNIT_EXPECT_EQ(test, 0, drm_int2fixp(1) + drm_int2fixp(-1));
|
|
|
|
/* 1 / 2 */
|
|
KUNIT_EXPECT_EQ(test, 1ll << 31, drm_fixp_from_fraction(1, 2));
|
|
|
|
/* -0.5 */
|
|
KUNIT_EXPECT_EQ(test, -(1ll << 31), drm_fixp_from_fraction(-1, 2));
|
|
|
|
/* (1 / 2) + (-1) = 0.5 */
|
|
KUNIT_EXPECT_EQ(test, 1ll << 31, drm_fixp_from_fraction(-1, 2) + drm_int2fixp(1));
|
|
|
|
/* (1 / 2) - 1) = 0.5 */
|
|
KUNIT_EXPECT_EQ(test, -(1ll << 31), drm_fixp_from_fraction(1, 2) + drm_int2fixp(-1));
|
|
|
|
/* (1 / 2) - 1) = 0.5 */
|
|
KUNIT_EXPECT_EQ(test, -(1ll << 31), drm_fixp_from_fraction(1, 2) - drm_int2fixp(1));
|
|
}
|
|
|
|
static struct kunit_case drm_fixp_tests[] = {
|
|
KUNIT_CASE(drm_test_int2fixp),
|
|
KUNIT_CASE(drm_test_sm2fixp),
|
|
{ }
|
|
};
|
|
|
|
static struct kunit_suite drm_fixp_test_suite = {
|
|
.name = "drm_fixp",
|
|
.test_cases = drm_fixp_tests,
|
|
};
|
|
|
|
kunit_test_suite(drm_fixp_test_suite);
|
|
|
|
MODULE_AUTHOR("AMD");
|
|
MODULE_LICENSE("Dual MIT/GPL");
|
|
MODULE_DESCRIPTION("Unit tests for drm_fixed.h");
|