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ddi_compute_wrpll: Factor out a common expression

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Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
This commit is contained in:
Damien Lespiau 2013-05-02 16:38:30 +01:00
parent 4897ac41da
commit 3b79360642
1 changed files with 7 additions and 8 deletions
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15
tests/ddi_compute_wrpll.c
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@ -102,7 +102,7 @@ static void wrpll_update_rnp(uint64_t freq2k, unsigned budget,
unsigned r2, unsigned n2, unsigned p, unsigned r2, unsigned n2, unsigned p,
struct wrpll_rnp *best) struct wrpll_rnp *best)
{ {
uint64_t a, b, c, d; uint64_t a, b, c, d, diff, diff_best;
/* No best (r,n,p) yet */ /* No best (r,n,p) yet */
if (best->p == 0) { if (best->p == 0) {
@ -128,16 +128,15 @@ static void wrpll_update_rnp(uint64_t freq2k, unsigned budget,
*/ */
a = freq2k * budget * p * r2; a = freq2k * budget * p * r2;
b = freq2k * budget * best->p * best->r2; b = freq2k * budget * best->p * best->r2;
c = 1e6 * ABS_DIFF((freq2k * p * r2), (LC_FREQ_2K * n2)); diff = ABS_DIFF((freq2k * p * r2), (LC_FREQ_2K * n2));
d = 1e6 * ABS_DIFF((freq2k * best->p * best->r2), diff_best = ABS_DIFF((freq2k * best->p * best->r2),
(LC_FREQ_2K * best->n2)); (LC_FREQ_2K * best->n2));
c = 1e6 * diff;
d = 1e6 * diff_best;
if (a < c && b < d) { if (a < c && b < d) {
/* If both are above the budget, pick the closer */ /* If both are above the budget, pick the closer */
if (best->p * best->r2 * ABS_DIFF((freq2k * p * r2), if (best->p * best->r2 * diff < p * r2 * diff_best) {
(LC_FREQ_2K * n2)) <
p * r2 * ABS_DIFF((freq2k * best->p * best->r2),
(LC_FREQ_2K * best->n2))) {
best->p = p; best->p = p;
best->n2 = n2; best->n2 = n2;
best->r2 = r2; best->r2 = r2;