Fixed crash after enabling Sound Interpolation mid game. Fixed Gaussian always selected bug when MMX Support is disabled. Some options that are only available with MMX enabled are now hidden if MMX is disabled.

zsnes/src/cpu/dspproc.asm

@@ -125,7 +125,7 @@ EXTSYM WDSPRegF5,WDSPRegF6,WDSPRegF7,WDSPRegF8,WDSPRegF9,WDSPRegFA,WDSPRegFB
 EXTSYM WDSPRegFC,WDSPRegFD,WDSPRegFE,WDSPRegFF
 EXTSYM spcBuffera,DSPMem,SoundInterpType,NoiseData,Voice0Disable
 EXTSYM cfgecho,Surround,echobuf,ENVDisable,LowPassFilterType
-EXTSYM EMUPause,AudioLogging
+EXTSYM EMUPause,AudioLogging,MMXSupport
 
 %ifdef __MSDOS__
 EXTSYM SB_alloc_dma,SB_quality_limiter,vibracard
@@ -477,18 +477,19 @@ NEWSYM conv2speed
     jnz .next
     ret
 
-EXTSYM MMXSupport
-
 NEWSYM AdjustFrequency
+      xor ebx,ebx
       mov al,[SoundInterpType]
       mov ah,[MMXSupport]
-      cmp ah,0
+      or al,al
+      je near .notgaussian
+      or ah,ah
       jne .mmx
+      cmp al,3
+      jb .mmx
       mov al,1
       mov [SoundInterpType],al
 .mmx
-      or al,al
-      je near .notgaussian
       cmp al,2
       je near .cubicspline
       ja near .fir_mmx
@@ -1902,8 +1903,8 @@ BRRDecode:
     dec byte[sampleleft]
     jnz .nextsample
 
-    cmp byte[SoundInterpType],1
-	jae .BRR_decode_ahead
+    cmp dword[DSPInterpolate],0
+	jnz .BRR_decode_ahead
 
 	cmp byte[LowPassFilterType],2
 	jle near .no_dlpf
@@ -4444,7 +4445,7 @@ NEWSYM EchoStereo
     pop edx
     pop ebx
     mov ebx,[Voice0Freq+%1*4]
-    cmp byte[SoundInterpType],0
+    cmp dword[DSPInterpolate],0
     je %%notinterpsound
     cmp byte[StereoSound],1
     je near %%EndofProcessNEnvsi
@@ -4485,7 +4486,7 @@ NEWSYM EchoStereo
     pop edx
     pop ebx
     mov ebx,[Voice0Freq+%1*4]
-    cmp byte[SoundInterpType],0
+    cmp dword[DSPInterpolate],0
     je %%notinterpsound2
     cmp byte[StereoSound],1
     je near %%EndofProcessNEnvsi
@@ -4500,7 +4501,7 @@ NEWSYM EchoStereo
     mov dword[Voice0Time+%1*4],0FFFFFFFFh
 %%ContinueGain
     mov ebx,[Voice0Freq+%1*4]
-    cmp byte[SoundInterpType],0
+    cmp dword[DSPInterpolate],0
     je %%notinterpsound3
     cmp byte[StereoSound],1
     je near %%EndofProcessNEnvsi
@@ -4626,7 +4627,7 @@ NEWSYM EchoStereo
     mov byte[UniqueSoundv],1
 %%NotUnique
 
-    cmp byte[SoundInterpType],0
+    cmp dword[DSPInterpolate],0
     je %%notinterpsound4
     cmp byte[StereoSound],1
     je %%NextSampleSi
@@ -4801,7 +4802,7 @@ NEWSYM EchoStereo
     mov [Voice0End+%1],al
     mov ebx,[Voice0Freq+%1*4]
     add dword[Voice0Ptr+%1*4],9
-    cmp byte[SoundInterpType],0
+    cmp dword[DSPInterpolate],0
     je %%notinterpsound6
     cmp byte[StereoSound],1
     je near %%NextSampleSi

zsnes/src/gui/guiwindp.inc

@@ -20,6 +20,8 @@
 
 
 
+EXTSYM VERSION_STR,placedate
+
 SECTION .text
 
 ; Window Display Routines
@@ -1742,14 +1744,20 @@ DisplayGUISound:                     ; Sound Related Options
     GUIDisplayCheckboxun 6,11,163,SoundInterpType,1,GUISoundTextE1,0
     GUIDisplayCheckboxun 6,11,173,SoundInterpType,2,GUISoundTextE2,0
 %ifndef __MSDOS__
+    cmp byte[MMXSupport],0
+    je near .no8ptinterp
     GUIDisplayCheckboxun 6,11,183,SoundInterpType,3,GUISoundTextE3,0
+.no8ptinterp
 %endif
 
     GUIDisplayTextY 6,106,158,GUISoundTextF
     GUIDisplayCheckboxun 6,111,163,LowPassFilterType,1,GUISoundTextF1,1
     GUIDisplayCheckboxun 6,111,173,LowPassFilterType,2,GUISoundTextF2,1
 %ifndef __MSDOS__
+    cmp byte[MMXSupport],0
+    je near .nohiqualityfilter
     GUIDisplayCheckboxun 6,111,183,LowPassFilterType,3,GUISoundTextF3,0
+.nohiqualityfilter
 %endif
 
     GUIDisplayBBox 6,15,61,69,69,167            ;Sampling Rate Box
@@ -3043,7 +3051,6 @@ DisplayGUIAbout:          ; Displays the About Box
 
     ;This will attach compile date onto the end of GUIGUIAboutText1
     pushad
-    EXTSYM VERSION_STR, placedate
     mov eax,GUIGUIAboutTextA1
     mov [VERSION_STR],eax
     call placedate