[Scummvm-cvs-logs] SF.net SVN: scummvm: [24802] scummvm/trunk/backends/platform/ds/arm9/source /blitters.cpp

[Tramboi at users.sourceforge.net]

Revision: 24802
          http://svn.sourceforge.net/scummvm/?rev=24802&view=rev
Author:   Tramboi
Date:     2006-12-02 07:02:15 -0800 (Sat, 02 Dec 2006)

Log Message:
-----------
NDS : Micro-optimizations for the software blitter

Modified Paths:
--------------
    scummvm/trunk/backends/platform/ds/arm9/source/blitters.cpp

Modified: scummvm/trunk/backends/platform/ds/arm9/source/blitters.cpp
===================================================================
--- scummvm/trunk/backends/platform/ds/arm9/source/blitters.cpp	2006-12-02 14:51:11 UTC (rev 24801)
+++ scummvm/trunk/backends/platform/ds/arm9/source/blitters.cpp	2006-12-02 15:02:15 UTC (rev 24802)
@@ -144,27 +144,27 @@
     u32 bs3 = s3 & 0x1F;
     u32 bs4 = s4 & 0x1F;
     
-    u32 gs0 = (s0 >> 5) & 0x1F;
+    u32 gs0_4 = (s0 >> 3) & 0x7C;
     u32 gs1 = (s1 >> 5) & 0x1F;
     u32 gs2 = (s2 >> 5) & 0x1F;
     u32 gs3 = (s3 >> 5) & 0x1F;
-    u32 gs4 = (s4 >> 5) & 0x1F;
+    u32 gs4_4 = (s4 >> 3) & 0x7C;
     
-    u32 rs0 = (s0 >> 10) & 0x1F;
+    u32 rs0_4 = (s0 >> 8) & 0x7C;
     u32 rs1 = (s1 >> 10) & 0x1F;
     u32 rs2 = (s2 >> 10) & 0x1F;
     u32 rs3 = (s3 >> 10) & 0x1F;
-    u32 rs4 = (s4 >> 10) & 0x1F;
+    u32 rs4_4 = (s4 >> 8) & 0x7C;
     
-    u32 rd0 = 4*rs0 +   rs1;
+    u32 rd0 = rs0_4 +   rs1;
     u32 rd1 = 2*rs1 + rs1 + 2*rs2;
     u32 rd2 = 2*rs2 + 2*rs3 + rs3;
-    u32 rd3 =   rs3 + 4*rs4;
+    u32 rd3 =   rs3 + rs4_4;
     
-    u32 gd0 = 4*gs0 +   gs1;
+    u32 gd0 = gs0_4 +   gs1;
     u32 gd1 = 2*gs1 + gs1 + 2*gs2;
     u32 gd2 = 2*gs2 + 2*gs3 + gs3;
-    u32 gd3 =   gs3 + 4*gs4;
+    u32 gd3 =   gs3 + gs4_4;
     
     u32 bd0 = 4*bs0 +   bs1;
     u32 bd1 = 2*bs1 + bs1 + 2*bs2;


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