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NDS : Micro-optimizations for the software blitter

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svn-id: r24811
This commit is contained in:
Bertrand Augereau 2006-12-06 20:36:14 +00:00
parent 8b68cfdb93
commit 9efed0388f
1 changed files with 7 additions and 9 deletions
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16
backends/platform/ds/arm9/source/blitters.cpp
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@ -197,15 +197,11 @@ static inline void RescaleBlock_5x1555_To_4x1555( u16 s0, u16 s1, u16 s2, u16 s3
gd0 = (gd0 * 51) >> 9; gd1 = (gd1 * 51) >> 9; gd2 = (gd2 * 51) >> 9; gd3 = (gd3 * 51) >> 9;
bd0 = (bd0 * 51) >> 9; bd1 = (bd1 * 51) >> 9; bd2 = (bd2 * 51) >> 9; bd3 = (bd3 * 51) >> 9;
u32 d0 = 0x8000 | (rd0 << 10) | (gd0 << 5) | bd0;
u32 d1 = 0x8000 | (rd1 << 10) | (gd1 << 5) | bd1;
u32 d2 = 0x8000 | (rd2 << 10) | (gd2 << 5) | bd2;
u32 d3 = 0x8000 | (rd3 << 10) | (gd3 << 5) | bd3;
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;
dest[0] = d0;
dest[1] = d1;
dest[2] = d2;
dest[3] = d3;
((u32*)dest)[0] = d10;
((u32*)dest)[1] = d32;
}
// Can't work in place
@ -241,13 +237,15 @@ void Rescale_320x1555Scanline_To_256x1555Scanline(u16* dest, const u16* src)
void Rescale_320x256xPAL8_To_256x256x1555(u16* dest, const u8* src, const u16* palette, int destStride, int srcStride)
{
/*
u16* fastRam = (u16 *) (0x37F8000 + 16384);
memcpy(fastRam, palette, 256 * 2);
*/
for(size_t i=0; i<200; ++i)
{
Rescale_320xPAL8Scanline_To_256x1555Scanline(dest + i*destStride, src + i *srcStride, fastRam);
Rescale_320xPAL8Scanline_To_256x1555Scanline(dest + i*destStride, src + i *srcStride, palette);
}
}