Sexy VDP renderer macro

#define DRAW_TILE_A(start, end, index) \
{ \
    VDP_ArtTile *plane_entry = &plane_row[(start_x + (index)) & plane_width_mask]; \
    const uint8_t pixel_high_bits = plane_entry->pixel_high; \
 \
    const uint8_t *tile_pixels = &vdp_tile_buffer[plane_entry->tile_index][plane_entry->y_flip ? 8 - raw_y - 1 : raw_y][plane_entry->x_flip ? 8 - (start) - 1 : (start)]; \
 \
    if ((start) == 0 && (end) == 8) /* Hopefully this gets optimised-out by the compiler */ \
    { \
        if (plane_entry->x_flip) \
        { \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
        } \
        else \
        { \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
            *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
        } \
    } \
    else \
    { \
        const unsigned int length = (end) - (start); \
 \
        if (plane_entry->x_flip) \
        { \
            switch (length) \
            { \
                case 8: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 7: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 6: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 5: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 4: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 3: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 2: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 1: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels--]; ++indexed_framebuffer_pointer; \
                    break; \
            } \
        } \
        else \
        { \
            switch (length) \
            { \
                case 8: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 7: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 6: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 5: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 4: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 3: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 2: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
                    /* Fallthrough */ \
                case 1: \
                    *indexed_framebuffer_pointer = blit_lookup[*indexed_framebuffer_pointer][pixel_high_bits | *tile_pixels++]; ++indexed_framebuffer_pointer; \
                    break; \
            } \
        } \
    } \
}