Timerix/DTLib.XXHash
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Add support for AVX2

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This commit is contained in:
Oleksandr Melnyk 2022-06-05 20:02:06 +03:00
parent a19b68185e
commit d64922c63b
1 changed files with 79 additions and 3 deletions
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82
src/Standart.Hash.xxHash/xxHash128.XXH3.cs
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@ -379,12 +379,39 @@ namespace Standart.Hash.xxHash
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static unsafe void XXH3_accumulate_512(ulong* acc, byte* input, byte* secret)
{
if (Sse2.IsSupported)
if (Avx2.IsSupported)
XXH3_accumulate_512_avx2(acc, input, secret);
else if (Sse2.IsSupported)
XXH3_accumulate_512_sse2(acc, input, secret);
else
XXH3_accumulate_512_scalar(acc, input, secret);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static unsafe void XXH3_accumulate_512_avx2(ulong* acc, byte* input, byte* secret)
{
const int m256i_size = 32;
const byte _MM_SHUFFLE_0_3_0_1 = 0b0011_0001;
const byte _MM_SHUFFLE_1_0_3_2 = 0b0100_1110;
for (int i = 0; i < XXH_STRIPE_LEN / m256i_size; i++)
{
int uint32_offset = i * 8;
int uint64_offset = i * 4;
var acc_vec = Avx2.LoadVector256(acc + uint64_offset);
var data_vec = Avx2.LoadVector256((uint*)input + uint32_offset);
var key_vec = Avx2.LoadVector256((uint*)secret + uint32_offset);
var data_key = Avx2.Xor(data_vec, key_vec);
var data_key_lo = Avx2.Shuffle(data_key, _MM_SHUFFLE_0_3_0_1);
var product = Avx2.Multiply(data_key, data_key_lo);
var data_swap = Avx2.Shuffle(data_vec, _MM_SHUFFLE_1_0_3_2).AsUInt64();
var sum = Avx2.Add(acc_vec, data_swap);
var result = Avx2.Add(product, sum);
Avx2.Store(acc + uint64_offset, result);
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static unsafe void XXH3_accumulate_512_sse2(ulong* acc, byte* input, byte* secret)
{
@ -435,12 +462,38 @@ namespace Standart.Hash.xxHash
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static unsafe void XXH3_scrambleAcc(ulong* acc, byte* secret)
{
if (Sse2.IsSupported)
if (Avx2.IsSupported)
XXH3_scrambleAcc_avx2(acc, secret);
else if (Sse2.IsSupported)
XXH3_scrambleAcc_sse2(acc, secret);
else
XXH3_scrambleAcc_scalar(acc, secret);
}
private static unsafe void XXH3_scrambleAcc_avx2(ulong* acc, byte* secret)
{
const int m256i_size = 32;
const byte _MM_SHUFFLE_0_3_0_1 = 0b0011_0001;
var prime32 = Vector256.Create(XXH_PRIME32_1);
for (int i = 0; i < XXH_STRIPE_LEN / m256i_size; i++)
{
int uint64_offset = i * 4;
var acc_vec = Avx2.LoadVector256(acc + uint64_offset);
var shifted = Avx2.ShiftRightLogical(acc_vec, 47);
var data_vec = Avx2.Xor(acc_vec, shifted);
var key_vec = Avx2.LoadVector256((ulong*) secret + uint64_offset);
var data_key = Avx2.Xor(data_vec, key_vec).AsUInt32();
var data_key_hi = Avx2.Shuffle(data_key, _MM_SHUFFLE_0_3_0_1);
var prod_lo = Avx2.Multiply(data_key, prime32);
var prod_hi = Avx2.Multiply(data_key_hi, prime32);
var result = Avx2.Add(prod_lo, Avx2.ShiftLeftLogical(prod_hi, 32));
Avx2.Store(acc + uint64_offset, result);
}
}
private static unsafe void XXH3_scrambleAcc_sse2(ulong* acc, byte* secret)
{
const int m128i_size = 16;
@ -492,12 +545,35 @@ namespace Standart.Hash.xxHash
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static unsafe void XXH3_initCustomSecret(byte* customSecret, ulong seed)
{
if (Sse2.IsSupported)
if (Avx2.IsSupported)
XXH3_initCustomSecret_avx2(customSecret, seed);
else if (Sse2.IsSupported)
XXH3_initCustomSecret_sse2(customSecret, seed);
else
XXH3_initCustomSecret_scalar(customSecret, seed);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static unsafe void XXH3_initCustomSecret_avx2(byte* customSecret, ulong seed64)
{
const int m256i_size = 32;
var seed = Vector256.Create((ulong)seed64, (ulong)(0U - seed64), (ulong)seed64, (ulong)(0U - seed64));
fixed (byte* secret = &XXH3_SECRET[0])
{
for (int i = 0; i < XXH_SECRET_DEFAULT_SIZE / m256i_size; i++)
{
int uint64_offset = i * 4;
var src32 = Avx2.LoadVector256(((ulong*)secret) + uint64_offset);
var dst32 = Avx2.Add(src32, seed);
Avx2.Store((ulong*) customSecret + uint64_offset, dst32);
}
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static unsafe void XXH3_initCustomSecret_sse2(byte* customSecret, ulong seed64)
{