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Eliminates most masks, at least for now.

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This commit is contained in:
Thomas Harte 2019-11-05 23:17:59 -05:00
parent 41f3c29e30
commit 0ce807805d
1 changed files with 6 additions and 5 deletions
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11
Machines/AtariST/Video.cpp
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@ -137,9 +137,10 @@ void Video::run_for(HalfCycles duration) {
output_border(run_length); output_border(run_length);
} else { } else {
if(run_length < 32) { if(run_length < 32) {
shift_out(run_length); shift_out(run_length); // TODO: this might end up overrunning.
} else { } else {
shift_out(32); shift_out(32);
output_shifter = 0;
output_border(run_length - 32); output_border(run_length - 32);
} }
} }
@ -255,12 +256,12 @@ void Video::shift_out(int length) {
((output_shifter >> 63) & 1) | ((output_shifter >> 63) & 1) |
((output_shifter >> 46) & 2) ((output_shifter >> 46) & 2)
]; ];
output_shifter = (output_shifter << 1) & 0xefff; output_shifter = (output_shifter << 1);// & 0xfeffffff;
++pixel_buffer_.pixel_pointer; ++pixel_buffer_.pixel_pointer;
} }
} else { } else {
while(length--) { while(length--) {
output_shifter = (output_shifter << 1) & 0xefff; output_shifter = (output_shifter << 1);// & 0xfeffffff;
} }
} }
break; break;
@ -275,13 +276,13 @@ void Video::shift_out(int length) {
((output_shifter >> 29) & 4) | ((output_shifter >> 29) & 4) |
((output_shifter >> 12) & 8) ((output_shifter >> 12) & 8)
]; ];
output_shifter = (output_shifter << 1) & 0xeeee; output_shifter = (output_shifter << 1);// & 0xfefefefe;
++pixel_buffer_.pixel_pointer; ++pixel_buffer_.pixel_pointer;
length -= 2; length -= 2;
} }
} else { } else {
while(length) { while(length) {
output_shifter = (output_shifter << 1) & 0xeeee; output_shifter = (output_shifter << 1);// & 0xfefefefe;
length -= 2; length -= 2;
} }
} }