File p96_blit.c of Package uae

#if BLT_SIZE == 3
static void NOINLINE BLT_NAME (unsigned int w, unsigned int h, uae_u8 *src, uae_u8 *dst, int srcpitch, int dstpitch)
{
	uae_u8 *src2 = src;
	uae_u8 *dst2 = dst;
// REMOVEME: r is not used, and this is only a forwarder for uaelib_demux2.
#if 0
	uae_u32 *src2_32 = (uae_u32*)src;
	uae_u32 *dst2_32 = (uae_u32*)dst;
#endif
	unsigned int y, x, ww, xxd;
#ifdef BLT_TEMP
	uae_u32 tmp;
#endif
	w *= BLT_SIZE;
	ww = w / 4;
	xxd = w - (ww * 4);
	for(y = 0; y < h; y++) {
		uae_u8 *src_8;
		uae_u8 *dst_8;
		uae_u32 *src_32 = (uae_u32*)src2;
		uae_u32 *dst_32 = (uae_u32*)dst2;
		for (x = 0; x < ww; x++) {
			BLT_FUNC (src_32, dst_32);
			src_32++; dst_32++;
		}
		src_8 = (uae_u8*)src_32;
		dst_8 = (uae_u8*)dst_32;
		for (x = 0; x < xxd; x++) {
			BLT_FUNC (src_8, dst_8);
			src_8++;
			dst_8++;
		}
		dst2 += dstpitch;
		src2 += srcpitch;
	}
}
#else
static void NOINLINE BLT_NAME (unsigned int w, unsigned int h, uae_u8 *src, uae_u8 *dst, int srcpitch, int dstpitch)
{
	uae_u8 *src2 = src;
	uae_u8 *dst2 = dst;
// REMOVEME: r is not used, and this is only a forwarder for uaelib_demux2.
#if 0
	uae_u32 *src2_32 = (uae_u32*)src;
	uae_u32 *dst2_32 = (uae_u32*)dst;
#endif
	unsigned int y, x, ww, xxd;
#ifdef BLT_TEMP
#if BLT_SIZE == 4
	uae_u32 tmp;
#elif BLT_SIZE == 2
	uae_u16 tmp;
#else
	uae_u8 tmp;
#endif
#endif

	if (w < 8 * BLT_MULT) {
		ww = w / BLT_MULT;
		for(y = 0; y < h; y++) {
			uae_u32 *src_32 = (uae_u32*)src2;
			uae_u32 *dst_32 = (uae_u32*)dst2;
			for (x = 0; x < ww; x++) {
				BLT_FUNC (src_32, dst_32);
				src_32++; dst_32++;
			}
#if BLT_SIZE == 2
			if (w & 1) {
#ifdef BLT_NEED_SOURCE
				uae_u16 *src_16 = (uae_u16*)src_32;
#endif
				uae_u16 *dst_16 = (uae_u16*)dst_32;
#ifdef BLT_NEED_SOURCE
				BLT_FUNC (src_16, dst_16);
#else
				BLT_FUNC (NULL, dst_16);
#endif // BLT_NEED_SOURCE
			}
#elif BLT_SIZE == 1
			{
				int wb = w & 3;
				uae_u8 *src_8 = (uae_u8*)src_32;
				uae_u8 *dst_8 = (uae_u8*)dst_32;
				while (wb--) {
					BLT_FUNC (src_8, dst_8);
					src_8++;
					dst_8++;
				}
			}
#endif
			dst2 += dstpitch;
			src2 += srcpitch;
		}
		return;
	}

	ww = w / (8 * BLT_MULT);
	xxd = (w - ww * (8 * BLT_MULT)) / BLT_MULT;
	for(y = 0; y < h; y++) {
		uae_u32 *src_32 = (uae_u32*)src2;
		uae_u32 *dst_32 = (uae_u32*)dst2;
		for (x = 0; x < ww; x++) {
			BLT_FUNC (src_32, dst_32);
			src_32++; dst_32++;
			BLT_FUNC (src_32, dst_32);
			src_32++; dst_32++;
			BLT_FUNC (src_32, dst_32);
			src_32++; dst_32++;
			BLT_FUNC (src_32, dst_32);
			src_32++; dst_32++;
			BLT_FUNC (src_32, dst_32);
			src_32++; dst_32++;
			BLT_FUNC (src_32, dst_32);
			src_32++; dst_32++;
			BLT_FUNC (src_32, dst_32);
			src_32++; dst_32++;
			BLT_FUNC (src_32, dst_32);
			src_32++; dst_32++;
		}
		for (x = 0; x < xxd; x++) {
			BLT_FUNC (src_32, dst_32);
			src_32++; dst_32++;
		}
#if BLT_SIZE == 2
		if (w & 1) {
#ifdef BLT_NEED_SOURCE
			uae_u16 *src_16 = (uae_u16*)src_32;
#endif // BLT_NEED_SOURCE
			uae_u16 *dst_16 = (uae_u16*)dst_32;
#ifdef BLT_NEED_SOURCE
			BLT_FUNC (src_16, dst_16);
#else
			BLT_FUNC (NULL, dst_16);
#endif // BLT_NEED_SOURCE

		}
#elif BLT_SIZE == 1
		{
			int wb = w & 3;
			uae_u8 *src_8 = (uae_u8*)src_32;
			uae_u8 *dst_8 = (uae_u8*)dst_32;
			while (wb--) {
				BLT_FUNC (src_8, dst_8);
				src_8++;
				dst_8++;
			}
		}
#endif
		dst2 += dstpitch;
		src2 += srcpitch;
	}
}
#endif
#undef BLT_NAME
#undef BLT_FUNC
#ifdef BLT_TEMP
#undef BLT_TEMP
#endif
#define BLT_NEED_SOURCE