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Further simplified inner loops.

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This commit is contained in:
Thomas Harte 2016-01-21 21:35:04 -05:00
parent 34640cec93
commit 82cb1c365c
1 changed files with 18 additions and 18 deletions
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36
Machines/Electron/Electron.cpp
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@ -520,12 +520,16 @@ inline void Machine::update_display()
while(pixels_to_output--)
{
GetNextPixels();
for(int c = 0; c < 8; c++)
{
uint8_t colour = (pixels&0x80) >> 4;
_writePointer[c] = _palette[colour];
pixels <<= 1;
}
_writePointer[0] = _palette[(pixels&0x80) >> 4];
_writePointer[1] = _palette[(pixels&0x40) >> 3];
_writePointer[2] = _palette[(pixels&0x20) >> 2];
_writePointer[3] = _palette[(pixels&0x10) >> 1];
_writePointer[4] = _palette[(pixels&0x08) >> 0];
_writePointer[5] = _palette[(pixels&0x04) << 1];
_writePointer[6] = _palette[(pixels&0x02) << 2];
_writePointer[7] = _palette[(pixels&0x01) << 3];
_writePointer += 8;
}
break;
@ -535,12 +539,12 @@ inline void Machine::update_display()
while(pixels_to_output--)
{
GetNextPixels();
for(int c = 0; c < 4; c ++)
{
uint8_t colour = ((pixels&0x80) >> 4) | ((pixels&0x08) >> 2);
_writePointer[c] = _palette[colour];
pixels <<= 1;
}
_writePointer[0] = _palette[((pixels&0x80) >> 4) | ((pixels&0x08) >> 2)];
_writePointer[1] = _palette[((pixels&0x40) >> 3) | ((pixels&0x04) >> 1)];
_writePointer[2] = _palette[((pixels&0x20) >> 2) | ((pixels&0x02) >> 0)];
_writePointer[3] = _palette[((pixels&0x10) >> 1) | ((pixels&0x01) << 1)];
_writePointer += 4;
}
break;
@ -549,12 +553,8 @@ inline void Machine::update_display()
while(pixels_to_output--)
{
GetNextPixels();
for(int c = 0; c < 2; c ++)
{
uint8_t colour = ((pixels&0x80) >> 4) | ((pixels&0x20) >> 3) | ((pixels&0x08) >> 2) | ((pixels&0x02) >> 1);
_writePointer[c] = _palette[colour];
pixels <<= 1;
}
_writePointer[0] = _palette[((pixels&0x80) >> 4) | ((pixels&0x20) >> 3) | ((pixels&0x08) >> 2) | ((pixels&0x02) >> 1)];
_writePointer[1] = _palette[((pixels&0x40) >> 3) | ((pixels&0x10) >> 2) | ((pixels&0x04) >> 1) | ((pixels&0x01) >> 0)];
_writePointer += 2;
}
break;