mono-jit

- fix alignment issue with jitcache that could cause a crash.
- Reimplement sparse-jit to only use 1 layer.
    - the old 2 layer approach basically only ever used 1 path due to the bottom-layer size, so doing a double look-up seemed wasteful.
    - changed memory block allocation stategy to allocate based on requested code range instead of the possible address-space.

Co-authored-by: LotP1 <68976644+LotP1@users.noreply.github.com>

src/ARMeilleure/Translation/Cache/JitCache.cs

@@ -129,8 +129,9 @@ namespace ARMeilleure.Translation.Cache
         {
             int endOffs = offset + size;
             int regionStart = (offset % (int)CacheSize) & ~_pageMask;
-            int regionEnd = ((endOffs % (int)CacheSize) + _pageMask) & ~_pageMask;
-
+            int regionEnd = endOffs % (int)CacheSize == 0
+                ? (((int)CacheSize) + _pageMask) & ~_pageMask
+                : ((endOffs % (int)CacheSize) + _pageMask) & ~_pageMask;
             GetRegion(offset).Block.MapAsRwx((ulong)regionStart, (ulong)(regionEnd - regionStart));
         }
 
@@ -138,7 +139,9 @@ namespace ARMeilleure.Translation.Cache
         {
             int endOffs = offset + size;
             int regionStart = (offset % (int)CacheSize) & ~_pageMask;
-            int regionEnd = ((endOffs % (int)CacheSize) + _pageMask) & ~_pageMask;
+            int regionEnd = endOffs % (int)CacheSize == 0
+                ? (((int)CacheSize) + _pageMask) & ~_pageMask
+                : ((endOffs % (int)CacheSize) + _pageMask) & ~_pageMask;
 
             GetRegion(offset).Block.MapAsRx((ulong)regionStart, (ulong)(regionEnd - regionStart));
         }

src/ARMeilleure/Translation/PTC/Ptc.cs

@@ -32,7 +32,7 @@ namespace ARMeilleure.Translation.PTC
         private const string OuterHeaderMagicString = "PTCohd\0\0";
         private const string InnerHeaderMagicString = "PTCihd\0\0";
 
-        private const uint InternalVersion = 7016; //! To be incremented manually for each change to the ARMeilleure project.
+        private const uint InternalVersion = 7018; //! To be incremented manually for each change to the ARMeilleure project.
 
         private const string ActualDir = "0";
         private const string BackupDir = "1";

src/ARMeilleure/Translation/TranslatorStubs.cs

@@ -161,7 +161,7 @@ namespace ARMeilleure.Translation
             context.BranchIfTrue(lblFallback, masked);
 
             Operand index = default;
-            Operand page = Const((long)_functionTable.Base);
+            Operand page = Const(_functionTable.Base);
 
             for (int i = 0; i < _functionTable.Levels.Length; i++)
             {