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Optimization: eliminate redundant access through a struct.

This commit is contained in:
Stephen Anthony 2017-07-05 13:06:44 -02:30
parent 09af9d09a5
commit 6da07d8dc7
2 changed files with 5 additions and 8 deletions
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2
src/common/tv_filters/AtariNTSC.cxx
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@ -52,7 +52,7 @@ void AtariNTSC::initializePalette(const uInt8* palette)
int ir, ig, ib = YIQ_TO_RGB( y, i, q, myImpl.to_rgb, int, ir, ig ); int ir, ig, ib = YIQ_TO_RGB( y, i, q, myImpl.to_rgb, int, ir, ig );
uInt32 rgb = PACK_RGB( ir, ig, ib ); uInt32 rgb = PACK_RGB( ir, ig, ib );
uInt32* kernel = myNTSC.table[entry]; uInt32* kernel = myColorTable[entry];
genKernel(myImpl, y, i, q, kernel); genKernel(myImpl, y, i, q, kernel);
for ( uInt32 i = 0; i < rgb_kernel_size / 2; i++ ) for ( uInt32 i = 0; i < rgb_kernel_size / 2; i++ )

11
src/common/tv_filters/AtariNTSC.hxx
View File

@ -138,10 +138,7 @@ class AtariNTSC
#define PI 3.14159265358979323846f #define PI 3.14159265358979323846f
#define LUMA_CUTOFF 0.20 #define LUMA_CUTOFF 0.20
struct atari_ntsc_t { uInt32 myColorTable[palette_size][entry_size];
uInt32 table[palette_size][entry_size];
};
atari_ntsc_t myNTSC;
struct init_t struct init_t
{ {
@ -174,9 +171,9 @@ class AtariNTSC
// off a bit. Use atari_ntsc_black for unused pixels. // off a bit. Use atari_ntsc_black for unused pixels.
#define ATARI_NTSC_BEGIN_ROW( pixel0, pixel1 ) \ #define ATARI_NTSC_BEGIN_ROW( pixel0, pixel1 ) \
unsigned const atari_ntsc_pixel0_ = (pixel0);\ unsigned const atari_ntsc_pixel0_ = (pixel0);\
uInt32 const* kernel0 = myNTSC.table[atari_ntsc_pixel0_];\ uInt32 const* kernel0 = myColorTable[atari_ntsc_pixel0_];\
unsigned const atari_ntsc_pixel1_ = (pixel1);\ unsigned const atari_ntsc_pixel1_ = (pixel1);\
uInt32 const* kernel1 = myNTSC.table[atari_ntsc_pixel1_];\ uInt32 const* kernel1 = myColorTable[atari_ntsc_pixel1_];\
uInt32 const* kernelx0;\ uInt32 const* kernelx0;\
uInt32 const* kernelx1 = kernel0 uInt32 const* kernelx1 = kernel0
@ -184,7 +181,7 @@ class AtariNTSC
#define ATARI_NTSC_COLOR_IN( index, color ) {\ #define ATARI_NTSC_COLOR_IN( index, color ) {\
unsigned color_;\ unsigned color_;\
kernelx##index = kernel##index;\ kernelx##index = kernel##index;\
kernel##index = (color_ = (color), myNTSC.table[color_]);\ kernel##index = (color_ = (color), myColorTable[color_]);\
} }
// Generates output in the specified 32-bit format (x = junk bits). // Generates output in the specified 32-bit format (x = junk bits).