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stepcompress: Don't bother loop unrolling in push_sqrt() 

It's not necessary to have two loops - checking if factor is greater
than zero in the loop is fine.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2016-11-14 15:36:11 -05:00
parent fd7cb99f47
commit 6ab269ceb7
1 changed files with 5 additions and 10 deletions
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15
klippy/stepcompress.c
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@ -419,16 +419,11 @@ stepcompress_push_sqrt(struct stepcompress *sc, double steps, double step_offset
uint64_t *qn = sc->queue_next, *end = &qn[count]; uint64_t *qn = sc->queue_next, *end = &qn[count];
clock_offset += 0.5; clock_offset += 0.5;
double pos = step_offset + .5 + sqrt_offset/factor; double pos = step_offset + .5 + sqrt_offset/factor;
if (factor >= 0.0) while (qn < end) {
while (qn < end) { double v = safe_sqrt(pos*factor);
*qn++ = clock_offset + safe_sqrt(pos*factor); *qn++ = clock_offset + (factor >= 0. ? v : -v);
pos += 1.0; pos += 1.0;
} }
else
while (qn < end) {
*qn++ = clock_offset - safe_sqrt(pos*factor);
pos += 1.0;
}
sc->queue_next = qn; sc->queue_next = qn;
return sdir ? count : -count; return sdir ? count : -count;
} }