gtests/Common.cpp

   1 // Copyright (c) 2021 Google LLC
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 #include <cstdint>
  16
  17 #include <gmock/gmock.h>
  18 #include "glslang/Include/Common.h"
  19
  20 namespace {
  21
  22 TEST(IsPow2, Int_Negative) {
  23   EXPECT_EQ(false, glslang::IsPow2(-5));
  24   EXPECT_EQ(false, glslang::IsPow2(-1));
  25   EXPECT_EQ(false, glslang::IsPow2(INT_MIN));
  26   EXPECT_EQ(false, glslang::IsPow2(int64_t(-10)));
  27 }
  28
  29 TEST(IsPow2, Zero) {
  30   EXPECT_EQ(false, glslang::IsPow2(0));
  31   EXPECT_EQ(false, glslang::IsPow2(0u));
  32   EXPECT_EQ(false, glslang::IsPow2(0));
  33   EXPECT_EQ(false, glslang::IsPow2(uint64_t(0)));
  34   EXPECT_EQ(false, glslang::IsPow2(int64_t(0)));
  35 }
  36
  37 TEST(IsPow2, Int_Positive_PowersOf2) {
  38   EXPECT_EQ(true, glslang::IsPow2(1));
  39   EXPECT_EQ(true, glslang::IsPow2(2));
  40   EXPECT_EQ(true, glslang::IsPow2(4));
  41   EXPECT_EQ(true, glslang::IsPow2(8));
  42   EXPECT_EQ(true, glslang::IsPow2(16));
  43   EXPECT_EQ(true, glslang::IsPow2(32768));
  44   EXPECT_EQ(true, glslang::IsPow2(65536));
  45   EXPECT_EQ(true, glslang::IsPow2(2147483648));
  46 }
  47
  48 TEST(IsPow2, Int_Positive_NonPowersOf2) {
  49   EXPECT_EQ(false, glslang::IsPow2(3));
  50   EXPECT_EQ(false, glslang::IsPow2(5));
  51   EXPECT_EQ(false, glslang::IsPow2(2147483647));
  52 }
  53
  54 TEST(IsPow2, Uint_Positive_PowersOf2) {
  55   EXPECT_EQ(true, glslang::IsPow2(1u));
  56   EXPECT_EQ(true, glslang::IsPow2(2u));
  57   EXPECT_EQ(true, glslang::IsPow2(4u));
  58   EXPECT_EQ(true, glslang::IsPow2(8u));
  59   EXPECT_EQ(true, glslang::IsPow2(16u));
  60   EXPECT_EQ(true, glslang::IsPow2(32768u));
  61   EXPECT_EQ(true, glslang::IsPow2(65536u));
  62   EXPECT_EQ(true, glslang::IsPow2(2147483648u));
  63 }
  64
  65 TEST(IsPow2, Uint_Positive_NonPowersOf2) {
  66   EXPECT_EQ(false, glslang::IsPow2(3u));
  67   EXPECT_EQ(false, glslang::IsPow2(5u));
  68   EXPECT_EQ(false, glslang::IsPow2(2147483647u));
  69 }
  70
  71 TEST(IntLog2, Int) {
  72   EXPECT_EQ(0, glslang::IntLog2(1));
  73   EXPECT_EQ(1, glslang::IntLog2(2));
  74   EXPECT_EQ(2, glslang::IntLog2(4));
  75   EXPECT_EQ(3, glslang::IntLog2(8));
  76   EXPECT_EQ(4, glslang::IntLog2(16));
  77   EXPECT_EQ(5, glslang::IntLog2(32));
  78   EXPECT_EQ(6, glslang::IntLog2(64));
  79   EXPECT_EQ(7, glslang::IntLog2(128));
  80   EXPECT_EQ(8, glslang::IntLog2(256));
  81   EXPECT_EQ(9, glslang::IntLog2(512));
  82   EXPECT_EQ(10, glslang::IntLog2(1024));
  83   EXPECT_EQ(11, glslang::IntLog2(2048));
  84   EXPECT_EQ(12, glslang::IntLog2(0x1000));
  85   EXPECT_EQ(13, glslang::IntLog2(0x2000));
  86   EXPECT_EQ(14, glslang::IntLog2(0x4000));
  87   EXPECT_EQ(15, glslang::IntLog2(0x8000));
  88   EXPECT_EQ(16, glslang::IntLog2(0x10000));
  89   EXPECT_EQ(17, glslang::IntLog2(0x20000));
  90   EXPECT_EQ(18, glslang::IntLog2(0x40000));
  91   EXPECT_EQ(19, glslang::IntLog2(0x80000));
  92   EXPECT_EQ(20, glslang::IntLog2(0x100000));
  93   EXPECT_EQ(21, glslang::IntLog2(0x200000));
  94   EXPECT_EQ(22, glslang::IntLog2(0x400000));
  95   EXPECT_EQ(23, glslang::IntLog2(0x800000));
  96   EXPECT_EQ(24, glslang::IntLog2(0x1000000));
  97   EXPECT_EQ(25, glslang::IntLog2(0x2000000));
  98   EXPECT_EQ(26, glslang::IntLog2(0x4000000));
  99   EXPECT_EQ(27, glslang::IntLog2(0x8000000));
 100   EXPECT_EQ(28, glslang::IntLog2(0x10000000));
 101   EXPECT_EQ(29, glslang::IntLog2(0x20000000));
 102   EXPECT_EQ(30, glslang::IntLog2(0x40000000));
 103 }
 104
 105 TEST(IntLog2, Uint) {
 106   EXPECT_EQ(0, glslang::IntLog2(1u));
 107   EXPECT_EQ(1, glslang::IntLog2(2u));
 108   EXPECT_EQ(2, glslang::IntLog2(4u));
 109   EXPECT_EQ(3, glslang::IntLog2(8u));
 110   EXPECT_EQ(4, glslang::IntLog2(16u));
 111   EXPECT_EQ(5, glslang::IntLog2(32u));
 112   EXPECT_EQ(6, glslang::IntLog2(64u));
 113   EXPECT_EQ(7, glslang::IntLog2(128u));
 114   EXPECT_EQ(8, glslang::IntLog2(256u));
 115   EXPECT_EQ(9, glslang::IntLog2(512u));
 116   EXPECT_EQ(10, glslang::IntLog2(1024u));
 117   EXPECT_EQ(11, glslang::IntLog2(2048u));
 118   EXPECT_EQ(12, glslang::IntLog2(0x1000u));
 119   EXPECT_EQ(13, glslang::IntLog2(0x2000u));
 120   EXPECT_EQ(14, glslang::IntLog2(0x4000u));
 121   EXPECT_EQ(15, glslang::IntLog2(0x8000u));
 122   EXPECT_EQ(16, glslang::IntLog2(0x10000u));
 123   EXPECT_EQ(17, glslang::IntLog2(0x20000u));
 124   EXPECT_EQ(18, glslang::IntLog2(0x40000u));
 125   EXPECT_EQ(19, glslang::IntLog2(0x80000u));
 126   EXPECT_EQ(20, glslang::IntLog2(0x100000u));
 127   EXPECT_EQ(21, glslang::IntLog2(0x200000u));
 128   EXPECT_EQ(22, glslang::IntLog2(0x400000u));
 129   EXPECT_EQ(23, glslang::IntLog2(0x800000u));
 130   EXPECT_EQ(24, glslang::IntLog2(0x1000000u));
 131   EXPECT_EQ(25, glslang::IntLog2(0x2000000u));
 132   EXPECT_EQ(26, glslang::IntLog2(0x4000000u));
 133   EXPECT_EQ(27, glslang::IntLog2(0x8000000u));
 134   EXPECT_EQ(28, glslang::IntLog2(0x10000000u));
 135   EXPECT_EQ(29, glslang::IntLog2(0x20000000u));
 136   EXPECT_EQ(30, glslang::IntLog2(0x40000000u));
 137   EXPECT_EQ(31, glslang::IntLog2(0x80000000u));
 138 }
 139
 140 TEST(IntLog2, Int64) {
 141   EXPECT_EQ(0, glslang::IntLog2(int64_t(1)));
 142   EXPECT_EQ(1, glslang::IntLog2(int64_t(2)));
 143   EXPECT_EQ(2, glslang::IntLog2(int64_t(4)));
 144   EXPECT_EQ(3, glslang::IntLog2(int64_t(8)));
 145   EXPECT_EQ(30, glslang::IntLog2(int64_t(0x40000000u)));
 146   EXPECT_EQ(31, glslang::IntLog2(int64_t(0x80000000u)));
 147   EXPECT_EQ(32, glslang::IntLog2(int64_t(0x10000) * int64_t(0x10000)));
 148   EXPECT_EQ(48, glslang::IntLog2(int64_t(0x10000) * int64_t(0x10000) * int64_t(0x10000)));
 149   EXPECT_EQ(62, glslang::IntLog2(int64_t(0x10000) * int64_t(0x10000) * int64_t(0x10000) * int64_t(0x4000)));
 150 }
 151
 152 TEST(IntLog2, Uint64) {
 153   EXPECT_EQ(0, glslang::IntLog2(uint64_t(1)));
 154   EXPECT_EQ(1, glslang::IntLog2(uint64_t(2)));
 155   EXPECT_EQ(2, glslang::IntLog2(uint64_t(4)));
 156   EXPECT_EQ(3, glslang::IntLog2(uint64_t(8)));
 157   EXPECT_EQ(30, glslang::IntLog2(uint64_t(0x40000000u)));
 158   EXPECT_EQ(31, glslang::IntLog2(uint64_t(0x80000000u)));
 159   EXPECT_EQ(32, glslang::IntLog2(uint64_t(0x10000) * uint64_t(0x10000)));
 160   EXPECT_EQ(48, glslang::IntLog2(uint64_t(0x10000) * uint64_t(0x10000) * uint64_t(0x10000)));
 161   EXPECT_EQ(62, glslang::IntLog2(uint64_t(0x10000) * uint64_t(0x10000) * uint64_t(0x10000) * uint64_t(0x4000)));
 162   EXPECT_EQ(63, glslang::IntLog2(uint64_t(0x10000) * uint64_t(0x10000) * uint64_t(0x10000) * uint64_t(0x8000)));
 163 }
 164
 165 }  // anonymous namespace