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Add tests for bitwise intrinsics

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This commit is contained in:
Elliot Gorokhovsky 2022-02-14 17:15:30 -05:00
parent 6994a9f99c
commit 7c674a0919
1 changed files with 56 additions and 0 deletions
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56
tests/fuzzer.c
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@ -3375,6 +3375,62 @@ static int basicUnitTests(U32 const seed, double compressibility)
}
DISPLAYLEVEL(3, "OK \n");
DISPLAYLEVEL(3, "test%3i : testing bitwise instrinsics PR#3045: ", testNb++);
{
U32 seed_32 = seed == 0 ? seed + 1 : seed; // these intrinsics are undefined on 0
U64 seed_64 = (U64)seed * 0x87654321; // decent 64-bit distribution
U32 lowbit_only_32 = 1;
U64 lowbit_only_64 = 1;
U32 highbit_only_32 = (U32)1 << 31;
U64 highbit_only_64 = (U64)1 << 63;
/* Test ZSTD_countTrailingZeros32 */
CHECK_EQ(ZSTD_countTrailingZeros32(lowbit_only_32), 0u);
CHECK_EQ(ZSTD_countTrailingZeros32(highbit_only_32), 31u);
CHECK_EQ(ZSTD_countTrailingZeros32(seed_32), ZSTD_countTrailingZeros32_fallback(seed_32));
/* Test ZSTD_countLeadingZeros32 */
CHECK_EQ(ZSTD_countLeadingZeros32(lowbit_only_32), 31u);
CHECK_EQ(ZSTD_countLeadingZeros32(highbit_only_32), 0u);
CHECK_EQ(ZSTD_countLeadingZeros32(seed_32), ZSTD_countLeadingZeros32_fallback(seed_32));
/* Test ZSTD_countTrailingZeros64 */
CHECK_EQ(ZSTD_countTrailingZeros64(lowbit_only_64), 0u);
CHECK_EQ(ZSTD_countTrailingZeros64(highbit_only_64), 63u);
/* Test ZSTD_countLeadingZeros64 */
CHECK_EQ(ZSTD_countLeadingZeros64(lowbit_only_64), 63u);
CHECK_EQ(ZSTD_countLeadingZeros64(highbit_only_64), 0u);
/* Test ZSTD_highbit32 */
CHECK_EQ(ZSTD_highbit32(lowbit_only_32), 0u);
CHECK_EQ(ZSTD_highbit32(highbit_only_32), 31u);
/* Test ZSTD_NbCommonBytes */
if (MEM_isLittleEndian()) {
if (MEM_64bits()) {
CHECK_EQ(ZSTD_NbCommonBytes(lowbit_only_32), 0u);
CHECK_EQ(ZSTD_NbCommonBytes(highbit_only_32), 3u);
} else {
CHECK_EQ(ZSTD_NbCommonBytes(lowbit_only_32), 0u);
CHECK_EQ(ZSTD_NbCommonBytes(highbit_only_32), 3u);
}
} else {
if (MEM_64bits()) {
CHECK_EQ(ZSTD_NbCommonBytes(lowbit_only_32), 7u);
CHECK_EQ(ZSTD_NbCommonBytes(highbit_only_32), 4u);
} else {
CHECK_EQ(ZSTD_NbCommonBytes(lowbit_only_32), 3u);
CHECK_EQ(ZSTD_NbCommonBytes(highbit_only_32), 0u);
}
}
/* Test MEM_ intrinsics */
CHECK_EQ(MEM_swap32(seed_32), MEM_swap32_fallback(seed_32));
CHECK_EQ(MEM_swap64(seed_64), MEM_swap64_fallback(seed_64));
}
DISPLAYLEVEL(3, "OK \n");
#ifdef ZSTD_MULTITHREAD
DISPLAYLEVEL(3, "test%3i : passing wrong full dict should fail on compressStream2 refPrefix ", testNb++);
{ ZSTD_CCtx* cctx = ZSTD_createCCtx();