mirror of
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101 lines
4.2 KiB
C++
101 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/MathAlgorithms.h"
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using mozilla::CountLeadingZeroes32;
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using mozilla::CountLeadingZeroes64;
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using mozilla::CountTrailingZeroes32;
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using mozilla::CountTrailingZeroes64;
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static void
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TestLeadingZeroes32()
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{
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MOZ_ASSERT(CountLeadingZeroes32(0xF0FF1000) == 0);
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MOZ_ASSERT(CountLeadingZeroes32(0x7F8F0001) == 1);
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MOZ_ASSERT(CountLeadingZeroes32(0x3FFF0100) == 2);
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MOZ_ASSERT(CountLeadingZeroes32(0x1FF50010) == 3);
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MOZ_ASSERT(CountLeadingZeroes32(0x00800000) == 8);
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MOZ_ASSERT(CountLeadingZeroes32(0x00400000) == 9);
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MOZ_ASSERT(CountLeadingZeroes32(0x00008000) == 16);
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MOZ_ASSERT(CountLeadingZeroes32(0x00004000) == 17);
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MOZ_ASSERT(CountLeadingZeroes32(0x00000080) == 24);
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MOZ_ASSERT(CountLeadingZeroes32(0x00000040) == 25);
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MOZ_ASSERT(CountLeadingZeroes32(0x00000001) == 31);
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}
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static void
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TestLeadingZeroes64()
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{
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MOZ_ASSERT(CountLeadingZeroes64(0xF000F0F010000000) == 0);
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MOZ_ASSERT(CountLeadingZeroes64(0x70F080F000000001) == 1);
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MOZ_ASSERT(CountLeadingZeroes64(0x30F0F0F000100000) == 2);
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MOZ_ASSERT(CountLeadingZeroes64(0x10F0F05000000100) == 3);
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MOZ_ASSERT(CountLeadingZeroes64(0x0080000000000001) == 8);
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MOZ_ASSERT(CountLeadingZeroes64(0x0040000010001000) == 9);
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MOZ_ASSERT(CountLeadingZeroes64(0x000080F010000000) == 16);
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MOZ_ASSERT(CountLeadingZeroes64(0x000040F010000000) == 17);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000008000100100) == 24);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000004100010010) == 25);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000000080100100) == 32);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000000041001010) == 33);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000000000800100) == 40);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000000000411010) == 41);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000000000008001) == 48);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000000000004010) == 49);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000000000000081) == 56);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000000000000040) == 57);
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MOZ_ASSERT(CountLeadingZeroes64(0x0000000000000001) == 63);
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}
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static void
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TestTrailingZeroes32()
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{
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MOZ_ASSERT(CountTrailingZeroes32(0x0100FFFF) == 0);
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MOZ_ASSERT(CountTrailingZeroes32(0x7000FFFE) == 1);
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MOZ_ASSERT(CountTrailingZeroes32(0x0080FFFC) == 2);
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MOZ_ASSERT(CountTrailingZeroes32(0x0080FFF8) == 3);
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MOZ_ASSERT(CountTrailingZeroes32(0x010FFF00) == 8);
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MOZ_ASSERT(CountTrailingZeroes32(0x7000FE00) == 9);
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MOZ_ASSERT(CountTrailingZeroes32(0x10CF0000) == 16);
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MOZ_ASSERT(CountTrailingZeroes32(0x0BDE0000) == 17);
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MOZ_ASSERT(CountTrailingZeroes32(0x0F000000) == 24);
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MOZ_ASSERT(CountTrailingZeroes32(0xDE000000) == 25);
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MOZ_ASSERT(CountTrailingZeroes32(0x80000000) == 31);
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}
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static void
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TestTrailingZeroes64()
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{
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MOZ_ASSERT(CountTrailingZeroes64(0x000100000F0F0F0F) == 0);
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MOZ_ASSERT(CountTrailingZeroes64(0x070000000F0F0F0E) == 1);
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MOZ_ASSERT(CountTrailingZeroes64(0x000008000F0F0F0C) == 2);
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MOZ_ASSERT(CountTrailingZeroes64(0x000008000F0F0F08) == 3);
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MOZ_ASSERT(CountTrailingZeroes64(0xC001000F0F0F0F00) == 8);
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MOZ_ASSERT(CountTrailingZeroes64(0x0200000F0F0F0E00) == 9);
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MOZ_ASSERT(CountTrailingZeroes64(0xB0C10F0FEFDF0000) == 16);
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MOZ_ASSERT(CountTrailingZeroes64(0x0AAA00F0FF0E0000) == 17);
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MOZ_ASSERT(CountTrailingZeroes64(0xD010F0FEDF000000) == 24);
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MOZ_ASSERT(CountTrailingZeroes64(0x7AAF0CF0BE000000) == 25);
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MOZ_ASSERT(CountTrailingZeroes64(0x20F0A5D100000000) == 32);
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MOZ_ASSERT(CountTrailingZeroes64(0x489BF0B200000000) == 33);
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MOZ_ASSERT(CountTrailingZeroes64(0xE0F0D10000000000) == 40);
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MOZ_ASSERT(CountTrailingZeroes64(0x97F0B20000000000) == 41);
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MOZ_ASSERT(CountTrailingZeroes64(0x2C07000000000000) == 48);
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MOZ_ASSERT(CountTrailingZeroes64(0x1FBA000000000000) == 49);
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MOZ_ASSERT(CountTrailingZeroes64(0x0100000000000000) == 56);
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MOZ_ASSERT(CountTrailingZeroes64(0x0200000000000000) == 57);
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MOZ_ASSERT(CountTrailingZeroes64(0x8000000000000000) == 63);
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}
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int main()
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{
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TestLeadingZeroes32();
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TestLeadingZeroes64();
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TestTrailingZeroes32();
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TestTrailingZeroes64();
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return 0;
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}
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