TEST(BlockFrequencyTest, OneToZero) {
BlockFrequency Freq(1);
- BranchProbability Prob(UINT32_MAX - 1, UINT32_MAX);
+ BranchProbability Prob(UINT32_MAX / 3, UINT32_MAX);
Freq *= Prob;
EXPECT_EQ(Freq.getFrequency(), 0u);
BlockFrequency Freq(UINT64_MAX);
BranchProbability Prob(UINT32_MAX / 2, UINT32_MAX);
Freq *= Prob;
- EXPECT_EQ(Freq.getFrequency(), 9223372034707292159ULL);
+ EXPECT_EQ(Freq.getFrequency(), 9223372036854775807ULL);
Freq = BlockFrequency(UINT64_MAX);
Freq *= Prob;
- EXPECT_EQ(Freq.getFrequency(), 9223372034707292159ULL);
+ EXPECT_EQ(Freq.getFrequency(), 9223372036854775807ULL);
}
TEST(BlockFrequencyTest, BigToBig) {
EXPECT_EQ(Freq.getFrequency(), UINT64_MAX);
}
+TEST(BlockFrequencyTest, Subtract) {
+ BlockFrequency Freq1(0), Freq2(1);
+ EXPECT_EQ((Freq1 - Freq2).getFrequency(), 0u);
+ EXPECT_EQ((Freq2 - Freq1).getFrequency(), 1u);
+}
+
TEST(BlockFrequency, Divide) {
BlockFrequency Freq(0x3333333333333333ULL);
Freq /= BranchProbability(1, 2);
TEST(BlockFrequencyTest, Saturate) {
BlockFrequency Freq(0x3333333333333333ULL);
Freq /= BranchProbability(100, 300);
- EXPECT_EQ(Freq.getFrequency(), 0x9999999999999999ULL);
+ EXPECT_EQ(Freq.getFrequency(), 0x9999999866666668ULL);
Freq /= BranchProbability(1, 2);
EXPECT_EQ(Freq.getFrequency(), UINT64_MAX);
Freq = 0x1000000000000000ULL;
- Freq /= BranchProbability(10000, 160000);
+ Freq /= BranchProbability(10000, 170000);
EXPECT_EQ(Freq.getFrequency(), UINT64_MAX);
// Try to cheat the multiplication overflow check.
Freq = 0x00000001f0000001ull;
Freq /= BranchProbability(1000, 0xf000000f);
- EXPECT_EQ(33506781356485509ULL, Freq.getFrequency());
+ EXPECT_EQ(33527736066704712ULL, Freq.getFrequency());
}
TEST(BlockFrequencyTest, SaturatingRightShift) {