// 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");