mirror of https://github.com/gnss-sdr/gnss-sdr
49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
// SPDX-FileCopyrightText: 2017 Google Inc.
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// SPDX-License-Identifier: Apache-2.0
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#include "gtest/gtest.h"
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#include "internal/bit_utils.h"
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namespace cpu_features
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{
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namespace
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{
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TEST(UtilsTest, IsBitSet)
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{
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for (size_t bit_set = 0; bit_set < 32; ++bit_set)
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{
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const uint32_t value = 1UL << bit_set;
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for (uint32_t i = 0; i < 32; ++i)
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{
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EXPECT_EQ(IsBitSet(value, i), i == bit_set);
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}
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}
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// testing 0, all bits should be 0.
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for (uint32_t i = 0; i < 32; ++i)
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{
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EXPECT_FALSE(IsBitSet(0, i));
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}
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// testing ~0, all bits should be 1.
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for (uint32_t i = 0; i < 32; ++i)
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{
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EXPECT_TRUE(IsBitSet(-1, i));
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}
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}
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TEST(UtilsTest, ExtractBitRange)
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{
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// Extracting all bits gives the same number.
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EXPECT_EQ(ExtractBitRange(123, 31, 0), 123);
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// Extracting 1 bit gives parity.
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EXPECT_EQ(ExtractBitRange(123, 0, 0), 1);
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EXPECT_EQ(ExtractBitRange(122, 0, 0), 0);
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EXPECT_EQ(ExtractBitRange(0xF0, 7, 4), 0xF);
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EXPECT_EQ(ExtractBitRange(0x42 << 2, 10, 2), 0x42);
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}
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} // namespace
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} // namespace cpu_features
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