From 00b424f83a281a2cd077e426450c5f18ec55f5a2 Mon Sep 17 00:00:00 2001
From: Andrew Bachmann <andrewbachmann@nowhere.fake>
Date: Wed, 18 May 2005 21:12:16 +0000
Subject: [PATCH] test more values, add sin2+cos2=1 check

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12724 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 .../kernel/libroot/posix/math/math_test.cpp   | 43 +++++++++++++------
 1 file changed, 31 insertions(+), 12 deletions(-)

diff --git a/src/tests/kernel/libroot/posix/math/math_test.cpp b/src/tests/kernel/libroot/posix/math/math_test.cpp
index f926a4af42..64ad481d1b 100644
--- a/src/tests/kernel/libroot/posix/math/math_test.cpp
+++ b/src/tests/kernel/libroot/posix/math/math_test.cpp
@@ -41,12 +41,29 @@ main(int argc, char **argv)
 
 	status_t result = B_OK;
 
+	// test cos2 + sin2 = 1
+	fprintf(stdout, "value\tsin2()+cos2()\n");
+	for (int i = -63 ; i <= 63 ; i++) {
+		double f = (double)i/7.0;
+		double x = sin(f);
+		double y = cos(f);
+		if (fabs(x*x + y*y - 1.0) > 0.000001) {
+			fprintf(stdout, "%0.3f\t%0.10f", f, x*x + y*y);
+			fprintf(stdout, " **");
+			fprintf(stdout, "\n");
+			result = B_ERROR;
+		}
+	}
+	fprintf(stdout, "\n");
+
 	// test sin
 	fprintf(stdout, "value\tsin(value)\tbe_sin(value)\n");
-	for (int i = -9 ; i <= 9 ; i++) {
-		double f = (double)i;
-		fprintf(stdout, "%0.1f\t%0.10f\t%0.10f", f, sin(f), be_sin(f));
-		if (sin(f) != be_sin(f)) {
+	for (int i = -63 ; i <= 63 ; i++) {
+		double f = (double)i/7.0;
+		double x = sin(f);
+		double y = be_sin(f);
+		fprintf(stdout, "%0.3f\t%0.10f\t%0.10f", f, x, y);
+		if (fabs(x - y) > 0.000001) {
 			fprintf(stdout, " **");
 			result = B_ERROR;
 		}
@@ -56,10 +73,12 @@ main(int argc, char **argv)
 
 	fprintf(stdout, "value\tcos(value)\tbe_cos(value)\n");
 	// test cos
-	for (int i = -9 ; i <= 9 ; i++) {
-		double f = (double)i;
-		fprintf(stdout, "%0.1f\t%0.10f\t%0.10f", f, cos(f), be_cos(f));
-		if (cos(f) != be_cos(f)) {
+	for (int i = -63 ; i <= 63 ; i++) {
+		double f = (double)i/7.0;
+		double x = cos(f);
+		double y = be_cos(f);
+		fprintf(stdout, "%0.3f\t%0.10f\t%0.10f", f, x, y);
+		if (fabs(x - y) > 0.000001) {
 			fprintf(stdout, " **");
 			result = B_ERROR;
 		}
@@ -69,10 +88,10 @@ main(int argc, char **argv)
 
 	fprintf(stdout, "arg1\targ2\tcopysign()\tbe_copysign()\n");
 	// test copysign
-	for (int i = -9 ; i <= 9 ; i++) {
-		for (int j = -9 ; j <= 9 ; j++) {
-			double f = (double)i;
-			double g = (double)j;
+	for (int i = -21 ; i <= 21 ; i++) {
+		for (int j = -36 ; j <= 36 ; j++) {
+			double f = (double)i/3.0;
+			double g = (double)j/4.0;
 			double x = copysign(f, g);
 			double y = be_copysign(f, g);
 			if ((x != y) && !(isnan(x) && isnan(y))) {