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Repair a logic error introduced in r3816. Now both cases use an appropriate average.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@4029
This commit is contained in:
Peter Veenstra 2017-08-08 17:34:08 +00:00
parent 2719d869a0
commit 286818762d
1 changed files with 7 additions and 8 deletions
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15
src/dosbox.cpp
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@ -214,14 +214,13 @@ void increaseticks() { //Make it return ticksRemain and set it in the function a
* for very low ratios. High ratio might result because of timing resolution */
if (ticksScheduled >= 250 && ticksDone < 10 && ratio > 20480)
ratio = 20480;
Bit64s cmax_scaled = (Bit64s)CPU_CycleMax * (Bit64s)ratio;
/* The auto cycle code seems reliable enough to disable the fast cut back code.
* This should improve the fluency of complex games.
if (ratio <= 1024)
new_cmax = (Bit32s)(cmax_scaled / (Bit64s)1024);
else
*/
new_cmax = (Bit32s)(1 + (CPU_CycleMax >> 1) + cmax_scaled / (Bit64s)2048);
if (ratio <= 1024) {
double r = 2.0 /(1.0 + 1024.0/(static_cast<double>(ratio)));
new_cmax = 1 + static_cast<Bit32s>(CPU_CycleMax * r);
} else {
Bit64s cmax_scaled = (Bit64s)CPU_CycleMax * (Bit64s)ratio;
new_cmax = (Bit32s)(1 + (CPU_CycleMax >> 1) + cmax_scaled / (Bit64s)2048);
}
}
}