lib: Allow storing floating point values in igt_stats

We don't always have precise integers with which to store, so allow
degrading to double precision floating point based on available input.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 13 insertions, 2 deletions

diff --git a/lib/igt_stats.h b/lib/igt_stats.h
index 554ab158..0dc065f4 100644
--- a/lib/igt_stats.h
+++ b/lib/igt_stats.h
@@ -34,17 +34,27 @@
  * @n_values: The number of pushed values
  */
 typedef struct {
-	uint64_t *values;
+	union {
+		uint64_t *values_u64;
+		double *values_f;
+	};
 	unsigned int n_values;
+	unsigned int is_float : 1;
 
 	/*< private >*/
 	unsigned int capacity;
 	unsigned int is_population  : 1;
 	unsigned int mean_variance_valid : 1;
 	unsigned int sorted_array_valid : 1;
+
 	uint64_t min, max;
+	double range[2];
 	double mean, variance;
-	uint64_t *sorted;
+
+	union {
+		uint64_t *sorted_u64;
+		double *sorted_f;
+	};
 } igt_stats_t;
 
 void igt_stats_init(igt_stats_t *stats);
@@ -53,6 +63,7 @@ void igt_stats_fini(igt_stats_t *stats);
 bool igt_stats_is_population(igt_stats_t *stats);
 void igt_stats_set_population(igt_stats_t *stats, bool full_population);
 void igt_stats_push(igt_stats_t *stats, uint64_t value);
+void igt_stats_push_float(igt_stats_t *stats, double value);
 void igt_stats_push_array(igt_stats_t *stats,
 			  const uint64_t *values, unsigned int n_values);
 uint64_t igt_stats_get_min(igt_stats_t *stats);