perflab added

perflab/poly/cpe.h

@@ -0,0 +1,31 @@
+/* Compute CPE for function */
+
+/* Compute for function that is linear in some parameter cnt */
+typedef void (*elem_fun_t)(int);
+
+/* Different ways of finding samples 
+   UNI_SAMPLE: samples uniformly spaced between bias*maxcnt and maxcnt
+   RAN_SAMPLE: samples randomly selected between bias*maxcnt and maxcnt
+*/
+
+typedef enum {UNI_SAMPLE, RAN_SAMPLE}
+  sample_t;
+
+/* Find cpe for function f, which allows cnt up to maxcnt.
+   Uses default parameters
+*/
+double find_cpe(elem_fun_t f, int maxcnt);
+
+/* Find cpe for function f, which allows cnt up to maxcnt, using
+   specified number of sample points.
+   If data_file, then print data so that can plot points with Excel
+   smethod determines method for generating samples
+*/
+double find_cpe_full(elem_fun_t f, long int maxcnt, long int samples, FILE *data_file,
+		     sample_t smethod, double bias, long int verbose);
+
+/* Find number of cycles taken by function.
+   Do this by running number of trials until best two within TOL (2%) of
+   each other
+*/
+double measure_function(elem_fun_t f, int cnt);