fix bug in new texcache which caused performance disaster

desmume/ChangeLog

@@ -5,16 +5,24 @@ This totally changes the timing, and totally breaks old savestates.
 
 Highlights:
   * win32: lua engine, path configuration, 7z dearchiving support
-  * rewritten main emulation loop
+  * rewritten main emulation loop and improve general cpu timing
+  * synchronous SPU mode to fix	streaming sounds
   
 General/Core:
+ bug: rewrite main emulation loop, fixes a lot of timings
+ bug: add more detailed timing emulation, removes much bogus lag
+ bug: rewrite DMA and gxfifo to fix a bunch of bugs
  bug: fix cflash directory support for non-windows
  bug: fix freeze in cart irq
  bug: correctly emulate dma to/from tcm
  bug: fix in thumb LSR carryflag
- enh: add guitar grip emulation
+ bug: fix adpcm looping, remove adpcm caching (no longer necessary)
+ bug: fixes to swi 3,4,5, and arm7#8
+ bug: fixes to exmemstat and ipc sync registers
+ enh: gbaslot: add guitar grip, gbagame flash support, expansion memory pak
  enh: add more powerful antigrain-based drawing library and rewrite OSD system
  enh: ideas-style debugging prints
+ enh: most optimizations now SSE instead of SSE2
 
 Graphics:
  bug: fixing of obj blending, bmp obj rendering, and some obj window cases
@@ -26,21 +34,33 @@ Graphics:
  bug: fix simultaneous vram display and capture via same bank
  bug: fix 3d overflow acknowledge registers
  bug: change 3d cores to use 18bit color
+ bug: fix boxtest, move clipper to main graphics engine
+ bug: fix failure in some cases of polygon clipping
+ bug: fix disp3cnt emulations
+ bug: swrast: fix backface culling of nonconvex polys
  bug: swrast: add clear image and scroll emulation
  bug: swrast: add fog emulation
  bug: swrast: fixes to shadow rendering
+ bug: swrast: preliminary edge marking, works decent
+ enh: swrast: multicore optimization for a few fps speedup
   
 Windows:
- bug: improve map view tool to support more modes
+ bug: fix support for multiple gamepads and gamepad hotkeys
+ bug: fix mic noise code and load wav instead of raw; effective in more cases
+ enh: improve map view tool to support more modes
  enh: added 2x resizing filters (hq2x, hq2xs, lq2x, lq2xs, 2xsai, supereagle)
                                 (scanlines, nearest, bilinear)
  enh: soundview can now mute channels
  enh: multicore optimization for filters, rotation, OSD
  enh: new ioregview
-
+ enh: common commandline system, many arguments shared with linux
+ enh: setup x64 build type
+ enh: choose any gap size by dragging bottom window edge (must be enabled)
+ 
 Linux:
  enh: alsa microphone support
  enh: hud and osd notification for gtk and cli frontends
+ enh: add support for the SSE optimizations
 
 0.9.2 -> 0.9.4 (r1844->r2352->r2437)
 

desmume/src/texcache.cpp

@@ -630,6 +630,14 @@ public:
 		return newitem;
 	} //scan()
 
+	void invalidate()
+	{
+		for(TexCacheItem* curr = list_front;curr;curr=curr->next)
+		{
+			curr->suspectedInvalid = true;
+		}
+	}
+
 	void evict(const u32 target = kMaxCacheSize) {
 		//evicts old cache items until it is less than the max cache size
 		//this means we actually can exceed the cache by the size of the next item.
@@ -666,21 +674,8 @@ void TexCache_Reset()
 
 void TexCache_Invalidate()
 {
-	////well, this is a very blunt instrument.
-	////lets just flag all the textures as invalid.
-	//for(int i=0;i<MAX_TEXTURE+1;i++) {
-	//	texcache[i].suspectedInvalid = true;
-
-	//	//invalidate all 4x4 textures when texture palettes change mappings
-	//	//this is necessary because we arent tracking 4x4 texture palettes to look for changes.
-	//	//Although I concede this is a bit paranoid.. I think the odds of anyone changing 4x4 palette data
-	//	//without also changing the texture data is pretty much zero.
-	//	//
-	//	//TODO - move this to a separate signal: split into TexReconfigureSignal and TexPaletteReconfigureSignal
-	//	if(texcache[i].mode == TEXMODE_4X4)
-	//		texcache[i].frm = 0;
-	//}
-	texCache.evict(0);
+	//note that this gets called whether texdata or texpalette gets reconfigured.
+	texCache.invalidate();
 }
 
 TexCacheItem* TexCache_SetTexture(TexCache_TexFormat TEXFORMAT, u32 format, u32 texpal)