private static unsafe void ReplacePlusWithSpaceCore(Span <char> buffer, IntPtr state)
{
fixed(char *ptr = &MemoryMarshal.GetReference(buffer))
{
var input = (ushort *)state.ToPointer();
var output = (ushort *)ptr;
var i = (nint)0;
var n = (nint)(uint)buffer.Length;
if (Vector256.IsHardwareAccelerated && n >= Vector256 <ushort> .Count)
{
var vecPlus = Vector256.Create((ushort)'+');
var vecSpace = Vector256.Create((ushort)' ');
do
{
var vec = Vector256.Load(input + i);
var mask = Vector256.Equals(vec, vecPlus);
var res = Vector256.ConditionalSelect(mask, vecSpace, vec);
res.Store(output + i);
i += Vector256 <ushort> .Count;
} while (i <= n - Vector256 <ushort> .Count);
}
if (Vector128.IsHardwareAccelerated && n - i >= Vector128 <ushort> .Count)
{
var vecPlus = Vector128.Create((ushort)'+');
var vecSpace = Vector128.Create((ushort)' ');
do
{
var vec = Vector128.Load(input + i);
var mask = Vector128.Equals(vec, vecPlus);
var res = Vector128.ConditionalSelect(mask, vecSpace, vec);
res.Store(output + i);
i += Vector128 <ushort> .Count;
} while (i <= n - Vector128 <ushort> .Count);
}
for (; i < n; ++i)
{
if (input[i] != '+')
{
output[i] = input[i];
}
else
{
output[i] = ' ';
}
}
}
}