minor optimizations witout side effects

[drnoksnes] / gfx.cpp

diff --git a/gfx.cpp b/gfx.cpp
index 3ade0ba..85334ef 100644 (file)
--- a/gfx.cpp
+++ b/gfx.cpp
@@ -2206,8 +2206,8 @@ void DrawBackground (uint32 BGMode, uint32 bg, uint8 Z1, uint8 Z2)
            yy += (VOffset - CentreY) % 1023; \
        else \
            yy += VOffset - CentreY; \
-       int BB = l->MatrixB * yy + (CentreX << 8); \
-       int DD = l->MatrixD * yy + (CentreY << 8); \
+       register int BB = l->MatrixB * yy + (CentreX << 8); \
+       register int DD = l->MatrixD * yy + (CentreY << 8); \
 \
        for (uint32 clip = 0; clip < ClipCount; clip++) \
        { \
@@ -2218,8 +2218,8 @@ void DrawBackground (uint32 BGMode, uint32 bg, uint8 Z1, uint8 Z2)
                        if (Right <= Left) \
                                continue; \
            } \
-           TYPE *p = (TYPE *) Screen + Left; \
-           uint8 *d = Depth + Left; \
+           register TYPE *p = (TYPE *) Screen + Left; \
+           register uint8 *d = Depth + Left; \
 \
            if (PPU.Mode7HFlip) \
            { \
@@ -2252,7 +2252,7 @@ void DrawBackground (uint32 BGMode, uint32 bg, uint8 Z1, uint8 Z2)
                    int X = ((AA + BB) >> 8) & 0x3ff; \
                    int Y = ((CC + DD) >> 8) & 0x3ff; \
                    uint8 *TileData = VRAM1 + (Memory.VRAM[((Y & ~7) << 5) + ((X >> 2) & ~1)] << 7); \
-                   uint32 b = *(TileData + ((Y & 7) << 4) + ((X & 7) << 1)); \
+                   uint8 b = *(TileData + ((Y & 7) << 4) + ((X & 7) << 1)); \
                    GFX.Z1 = Mode7Depths [(b & GFX.Mode7PriorityMask) >> 7]; \
                    if (GFX.Z1 > *d && b) \
                    { \
@@ -2277,7 +2277,7 @@ void DrawBackground (uint32 BGMode, uint32 bg, uint8 Z1, uint8 Z2)
                    if (((X | Y) & ~0x3ff) == 0) \
                    { \
                                uint8 *TileData = VRAM1 + (Memory.VRAM[((Y & ~7) << 5) + ((X >> 2) & ~1)] << 7); \
-                               uint32 b = *(TileData + ((Y & 7) << 4) + ((X & 7) << 1)); \
+                               uint8 b = *(TileData + ((Y & 7) << 4) + ((X & 7) << 1)); \
                                GFX.Z1 = Mode7Depths [(b & GFX.Mode7PriorityMask) >> 7]; \
                                if (GFX.Z1 > *d && b) \
                                { \
@@ -2291,7 +2291,7 @@ void DrawBackground (uint32 BGMode, uint32 bg, uint8 Z1, uint8 Z2)
                                { \
                                        X = (x + HOffset) & 7; \
                                        Y = (yy + CentreY) & 7; \
-                                       uint32 b = *(VRAM1 + ((Y & 7) << 4) + ((X & 7) << 1)); \
+                                       uint8 b = *(VRAM1 + ((Y & 7) << 4) + ((X & 7) << 1)); \
                                        GFX.Z1 = Mode7Depths [(b & GFX.Mode7PriorityMask) >> 7]; \
                                        if (GFX.Z1 > *d && b) \
                                        { \