Added fix16_exp currently using the Taylor Series algorithm off Wikipedia, if anyone can optimize this better then go ahead.

Modified fixtest to be a little more generic, can now easily change which function it tests.

1 files changed, 18 insertions, 7 deletions

diff --git a/fixtest/main.c b/fixtest/main.c
index a7e9e89..93c945b 100644
--- a/fixtest/main.c
+++ b/fixtest/main.c
@@ -8,6 +8,17 @@
 

 #include "hiclock.h"

 

+//#define fix_func      fix16_exp

+//#define fix_func_str "fix16_exp"

+//#define flt_func      expf

+//#define flt_func_str "expf"

+

+#define fix_func      fix16_atan

+#define fix_func_str "fix16_atan"

+#define flt_func      atanf

+#define flt_func_str "atanf"

+

+

 

 int main(int argc, char** argv) {

     printf("libfixmath test tool\n");

@@ -16,7 +27,7 @@ int main(int argc, char** argv) {
 

 	uintptr_t args = (1 <<  8);

 	uintptr_t iter = (1 <<  8);

-	uintptr_t pass = (1 <<  8);

+	uintptr_t pass = (1 <<  6);

 

 	uintptr_t i;

 	srand(time(NULL));

@@ -35,7 +46,7 @@ int main(int argc, char** argv) {
 		for(i = 0; i < iter; i++) {

 			uintptr_t j;

 			for(j = 0; j < args; j++)

-				fix_result[j] = fix16_atan(fix_args[j]);

+				fix_result[j] = fix_func(fix_args[j]);

 		}

 		hiclock_t fix_end = hiclock();

 

@@ -47,7 +58,7 @@ int main(int argc, char** argv) {
 		for(i = 0; i < iter; i++) {

 			uintptr_t j;

 			for(j = 0; j < args; j++)

-				flt_result[j] = atanf(flt_args[j]);

+				flt_result[j] = flt_func(flt_args[j]);

 		}

 		hiclock_t flt_end = hiclock();

 

@@ -57,10 +68,10 @@ int main(int argc, char** argv) {
 		fix_duration += (fix_end - fix_start);

 	}

 

-	printf("Floating Point: %08"PRIuHICLOCK" @ %"PRIu32"Hz\n", flt_duration, HICLOCKS_PER_SEC);

-	printf("Fixed Point:    %08"PRIuHICLOCK" @ %"PRIu32"Hz\n", fix_duration, HICLOCKS_PER_SEC);

-	printf("Difference:     %08"PRIiHICLOCK" (% 3.2f%%)\n", (flt_duration - fix_duration), ((fix_duration * 100.0) / flt_duration));

-	printf("Error:          %f%%\n", ((fix16_to_dbl(fix_error) * 100.0) / (args * pass)));

+	printf("% 16s: %08"PRIuHICLOCK" @ %"PRIu32"Hz\n", fix_func_str, flt_duration, HICLOCKS_PER_SEC);

+	printf("% 16s: %08"PRIuHICLOCK" @ %"PRIu32"Hz\n", fix_func_str, fix_duration, HICLOCKS_PER_SEC);

+	printf("      Difference: %08"PRIiHICLOCK" (% 3.2f%%)\n", (flt_duration - fix_duration), ((fix_duration * 100.0) / flt_duration));

+	printf("           Error: %f%%\n", ((fix16_to_dbl(fix_error) * 100.0) / (args * pass)));

 

     return EXIT_SUCCESS;

 }