e2e1984e60
A few headers like BLI_math_constants.h and BLI_utildefines.h keep working for C code, for remaining makesdna and userdef defaults code in C. Pull Request: https://projects.blender.org/blender/blender/pulls/134406
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#include "BLI_math_bits.h"
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#include "BLI_sys_types.h"
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#include "testing/testing.h"
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TEST(math_bits, BitscanReverseClearUint)
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{
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uint a = 1234;
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 21);
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EXPECT_EQ(a, 210);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 24);
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EXPECT_EQ(a, 82);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 25);
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EXPECT_EQ(a, 18);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 27);
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EXPECT_EQ(a, 2);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 30);
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EXPECT_EQ(a, 0);
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a = 3563987529;
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 0);
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EXPECT_EQ(a, 1416503881);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 1);
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EXPECT_EQ(a, 342762057);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 3);
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EXPECT_EQ(a, 74326601);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 5);
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EXPECT_EQ(a, 7217737);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 9);
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EXPECT_EQ(a, 3023433);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 10);
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EXPECT_EQ(a, 926281);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 12);
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EXPECT_EQ(a, 401993);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 13);
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EXPECT_EQ(a, 139849);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 14);
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EXPECT_EQ(a, 8777);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 18);
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EXPECT_EQ(a, 585);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 22);
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EXPECT_EQ(a, 73);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 25);
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EXPECT_EQ(a, 9);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 28);
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EXPECT_EQ(a, 1);
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EXPECT_EQ(bitscan_reverse_clear_uint(&a), 31);
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EXPECT_EQ(a, 0);
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}
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TEST(math_bits, PopCount)
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{
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{
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EXPECT_EQ(count_bits_i(0), 0);
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EXPECT_EQ(count_bits_uint64(0), 0);
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}
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{
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const int value = (1 << 0) | (1 << 5) | (1 << 7);
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const int count_32 = count_bits_i(value);
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const int count_64 = count_bits_uint64(value);
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EXPECT_EQ(count_32, 3);
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EXPECT_EQ(count_64, 3);
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}
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{
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const uint64_t value = (uint64_t(1) << 0) | (uint64_t(1) << 50);
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const int count = count_bits_uint64(value);
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EXPECT_EQ(count, 2);
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}
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{
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const int value = -1;
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const int count = count_bits_i(value);
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EXPECT_EQ(count, 32);
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}
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{
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const uint64_t value = -1;
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const int count = count_bits_uint64(value);
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EXPECT_EQ(count, 64);
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}
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}
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