[Scummvm-cvs-logs] SF.net SVN: scummvm: [25702] scummvm/trunk/backends/platform/ds/arm9/source /blitters.cpp
Tramboi at users.sourceforge.net
Tramboi at users.sourceforge.net
Sun Feb 18 19:59:41 CET 2007
Revision: 25702
http://scummvm.svn.sourceforge.net/scummvm/?rev=25702&view=rev
Author: Tramboi
Date: 2007-02-18 10:59:40 -0800 (Sun, 18 Feb 2007)
Log Message:
-----------
NDS : CPU scaler performance experiment
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 2007-02-18 18:39:46 UTC (rev 25701)
+++ scummvm/trunk/backends/platform/ds/arm9/source/blitters.cpp 2007-02-18 18:59:40 UTC (rev 25702)
@@ -137,6 +137,11 @@
static bool isDivBy5Ready = false;
static u32 DIV_BY_5[160];
+//#define USE_2D_TABLE
+#ifdef USE_2D_TABLE
+static u8 A4_B1_DIV5[32][32];
+static u8 A3_B2_DIV5[32][32];
+#endif
void ComputeDivBy5TableIFN()
{
if (isDivBy5Ready)
@@ -148,6 +153,14 @@
DIV_BY_5[i] = (2*i+5)/10;
}
+ #ifdef USE_2D_TABLE
+ for(int i=0; i<32; ++i)
+ for(int j=0; j<32; ++j)
+ {
+ A4_B1_DIV5[i][j] = DIV_BY_5[4*i + j];
+ A3_B2_DIV5[i][j] = DIV_BY_5[3*i + 2*j];
+ }
+ #endif
}
static inline void RescaleBlock_5x1555_To_4x1555( u16 s0, u16 s1, u16 s2, u16 s3, u16 s4,
@@ -228,6 +241,46 @@
static inline void RescaleBlock_5x8888_To_4x1555( u32 s0, u32 s1, u32 s2, u32 s3, u32 s4,
u16* dest)
{
+#ifdef USE_2D_TABLE
+ u32 bs0 = s0 & 0xFF;
+ u32 bs1 = s1 & 0xFF;
+ u32 bs2 = s2 & 0xFF;
+ u32 bs3 = s3 & 0xFF;
+ u32 bs4 = s4 & 0xFF;
+
+ u32 gs0 = (s0 >> 8) & 0xFF;
+ u32 gs1 = (s1 >> 8) & 0xFF;
+ u32 gs2 = (s2 >> 8) & 0xFF;
+ u32 gs3 = (s3 >> 8) & 0xFF;
+ u32 gs4 = (s4 >> 8) & 0xFF;
+
+ u32 rs0 = (s0 >> 16);
+ u32 rs1 = (s1 >> 16);
+ u32 rs2 = (s2 >> 16);
+ u32 rs3 = (s3 >> 16);
+ u32 rs4 = (s4 >> 16);
+
+ u32 rd0 = A4_B1_DIV5[rs0][rs1];
+ u32 rd1 = A3_B2_DIV5[rs1][rs2];
+ u32 rd2 = A3_B2_DIV5[rs3][rs2];
+ u32 rd3 = A4_B1_DIV5[rs4][rs3];
+
+ u32 gd0 = A4_B1_DIV5[gs0][gs1];
+ u32 gd1 = A3_B2_DIV5[gs1][gs2];
+ u32 gd2 = A3_B2_DIV5[gs3][gs2];
+ u32 gd3 = A4_B1_DIV5[gs4][gs3];
+
+ u32 bd0 = A4_B1_DIV5[bs0][bs1];
+ u32 bd1 = A3_B2_DIV5[bs1][bs2];
+ u32 bd2 = A3_B2_DIV5[bs3][bs2];
+ u32 bd3 = A4_B1_DIV5[bs4][bs3];
+
+ u32 d10 = 0x80008000 | (rd1 << 26) | (gd1 << 21) | (bd1 << 16) | (rd0 << 10) | (gd0 << 5) | bd0;
+ u32 d32 = 0x80008000 | (rd3 << 26) | (gd3 << 21) | (bd3 << 16) | (rd2 << 10) | (gd2 << 5) | bd2;
+
+ ((u32*)dest)[0] = d10;
+ ((u32*)dest)[1] = d32;
+#else
u32 d0 = 4*s0 + s1;
u32 d1 = 2*s1 + s1 + 2*s2;
u32 d2 = 2*s2 + 2*s3 + s3;
@@ -268,6 +321,7 @@
((u32*)dest)[0] = d10;
((u32*)dest)[1] = d32;
+#endif
}
// Can't work in place
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