[API Proposal]: AVX512 BMM Intrinsics #123898
Description
Background and motivation
New AVX512 BMM (Bit Matrix Multiply and Bit Reversal) instructions have been published, and I would like to add support for these instructions as .NET intrinsics.
API Proposal
namespace System.Runtime.Intrinsics.X86
{
public abstract class Avx512Bmm : Avx512F
{
public static new bool IsSupported { get; }
public static Vector128<byte> ReverseBits(Vector128<byte> x);
public static Vector256<byte> ReverseBits(Vector256<byte> x);
public static Vector512<byte> ReverseBits(Vector512<byte> x);
public static Vector256<ushort> BitMultiplyMatrix16x16WithOrReduction(Vector256<ushort> x, Vector256<ushort> y, Vector256<ushort> z);
public static Vector512<ushort> BitMultiplyMatrix16x16WithOrReduction(Vector512<ushort> x, Vector512<ushort> y, Vector512<ushort> z);
public static Vector256<ushort> BitMultiplyMatrix16x16WithXorReduction(Vector256<ushort> x, Vector256<ushort> y, Vector256<ushort> z);
public static Vector512<ushort> BitMultiplyMatrix16x16WithXorReduction(Vector512<ushort> x, Vector512<ushort> y, Vector512<ushort> z);
}
}API Usage
Usage would be consistent with other AVX512 intrinsics:
Vector256<ushort> x = Vector256.Create((ushort)0x1);
Vector256<ushort> y = Vector256.Create((ushort)0x1);
Vector256<ushort> z = Vector256.Create((ushort)0x1011);
Vector256<ushort> result = Avx512Bmm.BitMatrix16x16x16MultiplyAddWithOrReduction(x, y, z);
// result = <0x1011, 0x1011, 0x1011, 0x1011, 0x1011, 0x1011, 0x1011, 0x1011,
// 0x1011, 0x1011, 0x1011, 0x1011, 0x1011, 0x1011, 0x1011, 0x1011>Vector128<byte> x = Vector128.Create((byte)0xAA);
Vector128<byte> y = Avx512Bmm.ReverseBits(x);
// y = <0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
// 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55>Alternative Designs
BitMatrix16x16x16MultiplyAddWithOrReduction is a lengthy name, and I'm open to other suggestions.
Risks
N/A