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util: introduce SQUARE macro

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This commit is contained in:
Miroslav Lichvar
2018-08-17 11:16:44 +02:00
parent a1f2f17385
commit 0b709ab1bc
6 changed files with 15 additions and 30 deletions
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29
reference.c
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@@ -325,23 +325,6 @@ REF_GetLeapMode(void)
return leap_mode;
}
/* ================================================== */
static double
Sqr(double x)
{
return x*x;
}
/* ================================================== */
#if 0
static double
Cube(double x)
{
return x*x*x;
}
#endif
/* ================================================== */
/* Update the drift coefficients to the file. */
@@ -1055,8 +1038,8 @@ REF_SetReference(int stratum,
/* Set new frequency based on weighted average of old and new skew. With
manual reference the old frequency has no weight. */
old_weight = leap != LEAP_Unsynchronised ? 1.0 / Sqr(previous_skew) : 0.0;
new_weight = 3.0 / Sqr(new_skew);
old_weight = leap != LEAP_Unsynchronised ? 1.0 / SQUARE(previous_skew) : 0.0;
new_weight = 3.0 / SQUARE(new_skew);
sum_weight = old_weight + new_weight;
@@ -1065,7 +1048,7 @@ REF_SetReference(int stratum,
delta_freq1 = previous_freq - our_frequency;
delta_freq2 = new_freq - our_frequency;
skew1 = sqrt((Sqr(delta_freq1) * old_weight + Sqr(delta_freq2) * new_weight) / sum_weight);
skew1 = sqrt((SQUARE(delta_freq1) * old_weight + SQUARE(delta_freq2) * new_weight) / sum_weight);
skew2 = (previous_skew * old_weight + new_skew * new_weight) / sum_weight;
our_skew = skew1 + skew2;
@@ -1125,11 +1108,11 @@ REF_SetReference(int stratum,
/* Update the moving average of squares of offset, quickly on start */
if (avg2_moving) {
avg2_offset += 0.1 * (our_offset * our_offset - avg2_offset);
avg2_offset += 0.1 * (SQUARE(our_offset) - avg2_offset);
} else {
if (avg2_offset > 0.0 && avg2_offset < our_offset * our_offset)
if (avg2_offset > 0.0 && avg2_offset < SQUARE(our_offset))
avg2_moving = 1;
avg2_offset = our_offset * our_offset;
avg2_offset = SQUARE(our_offset);
}
}