tiny.simd.combineShiftRightBytes

1pub fn combineShiftRightBytes(2    comptime D: type,3    comptime amount: usize,4    high: D.Vector,5    low: D.Vector,6) D.Vector {7    const bytes_per_block = @min(D.byte_count, 16);8    if (comptime amount >= bytes_per_block) @compileError("combined byte shift must remain inside a block");9    const high_bytes: [D.byte_count]u8 = @bitCast(high);10    const low_bytes: [D.byte_count]u8 = @bitCast(low);11    var result: [D.byte_count]u8 = undefined;12    inline for (0..D.byte_count) |index| {13        const base = index / bytes_per_block * bytes_per_block;14        const source = index % bytes_per_block + amount;15        result[index] = if (source < bytes_per_block)16            low_bytes[base + source]17        else18            high_bytes[base + source - bytes_per_block];19    }20    return @bitCast(result);21}

1pub const combineShiftRightBytes = block.combineShiftRightBytes;