From dc0a410a7e900ae1205a5551e7838afd01a4d045 Mon Sep 17 00:00:00 2001
From: Dimitris Panokostas <midwan@gmail.com>
Date: Sun, 28 Jan 2018 20:24:09 +0100
Subject: [PATCH] Added (unused) multithreaded version of copyall for P96 modes
 - might come in handy for some platforms, but no benefit for current ones

---
 src/osdep/picasso96.cpp | 37 +++++++++++++++++++++++++++++--------
 1 file changed, 29 insertions(+), 8 deletions(-)

diff --git a/src/osdep/picasso96.cpp b/src/osdep/picasso96.cpp
index bc8087fb..ff2178ed 100644
--- a/src/osdep/picasso96.cpp
+++ b/src/osdep/picasso96.cpp
@@ -3112,15 +3112,13 @@ static void copyall(uae_u8 *src, uae_u8 *dst)
 				__builtin_bswap16(*((uae_u16 *)(src + i + 2))) << 16 |
 				__builtin_bswap16(*((uae_u16 *)(src + i)))
 				);
-	}
-#else
-#ifdef USE_ARMNEON
+		}
+#elif USE_ARMNEON
 		copy_screen_16bit_swap(dst, src, picasso96_state.Width * picasso96_state.Height * 2);
 #else
 		copy_screen_16bit_swap_arm(dst, src, picasso96_state.Width * picasso96_state.Height * 2);
 #endif
-#endif
-}
+	}
 	else if (picasso96_state.RGBFormat == RGBFB_CLUT)
 	{
 #ifdef TINKER
@@ -3153,16 +3151,35 @@ static void copyall(uae_u8 *src, uae_u8 *dst)
 						)
 				);
 		}
-#else
-#ifdef USE_ARMNEON
+#elif USE_ARMNEON
 		copy_screen_32bit_to_16bit_neon(dst, src, picasso96_state.Width * picasso96_state.Height * 4);
 #else
 		copy_screen_32bit_to_16bit_arm(dst, src, picasso96_state.Width * picasso96_state.Height * 4);
-#endif
 #endif
 	}
 }
 
+#ifdef MULTITHREADED_COPYALL
+static struct srcdst_t {
+	uae_u8 *src;
+	uae_u8 *dst;
+} srcdst;
+
+static int copyall_multithreaded_wrapper(void *ptr) {
+	copyall(srcdst.src, srcdst.dst);
+	if (currprefs.leds_on_screen)
+		picasso_statusline(srcdst.dst);
+	return 0;
+
+}
+
+static void copyall_multithreaded(uae_u8 *src, uae_u8 *dst)
+{
+	srcdst.src = src; srcdst.dst = dst;
+	SDL_DetachThread(SDL_CreateThread(copyall_multithreaded_wrapper, "copyall_thread", nullptr));
+}
+#endif
+
 bool picasso_flushpixels(uae_u8 *src, int off)
 {
   uae_u8 *src_start;
@@ -3181,7 +3198,11 @@ bool picasso_flushpixels(uae_u8 *src, int off)
 	if (dst == NULL)
 		return false;
 
+#ifdef MULTITHREADED_COPYALL
+	copyall_multithreaded(src + off, dst);
+#else
 	copyall(src + off, dst);
+#endif
 
 	if (currprefs.leds_on_screen)
 		picasso_statusline(dst);