repository beautification, part 2:

rename the test programs to test_$(subsystem).c

1 files changed, 256 insertions, 0 deletions

diff --git a/test_float.c b/test_float.c
new file mode 100644
index 00000000..eb4362ec
--- /dev/null
+++ b/test_float.c
@@ -0,0 +1,256 @@
+/* $Id$ */
+#include <stdio.h>
+
+/*
+ * Copyright (c) 2006 Chris Kuethe <chris.kuethe@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * this simple program tests to see whether your system can do proper
+ * single and double precision floating point. This is apparently Very
+ * Hard To Do(tm) on embedded systems, judging by the number of broken
+ * ARM toolchains I've seen... :(
+ *
+ * compile with: gcc -O -o floattest floattest.c
+ *     (use whatever -O level you like)
+ */
+
+int main( void );
+int test_single( void );
+int test_double( void );
+
+int main(){
+	int i, j;
+
+	if ((i = test_single()))
+		printf("WARNING: Single-precision "
+			"floating point math might be broken\n");
+
+	if ((j = test_double()))
+		printf("WARNING: Double-precision "
+			"floating point math might be broken\n");
+
+	i += j;
+	if (i == 0)
+		printf("floating point math appears to work\n");
+	return i;
+}
+
+int test_single(){
+	static float f;
+	static int i;
+	static int e = 0;
+
+	/* addition test */
+	f = 1.0;
+	for(i = 0; i < 10; i++)
+		f += (1<<i);
+	if (f != 1024.0){
+		printf("s1 ");
+		e++;
+	}
+
+	/* subtraction test */
+	f = 1024.0;
+	for(i = 0; i < 10; i++)
+		f -= (1<<i);
+	if (f != 1.0){
+		printf("s2 ");
+		e++;
+	}
+
+	/* multiplication test */
+	f = 1.0;
+	for(i = 1; i < 10; i++)
+		f *= i;
+	if (f != 362880.0){
+		printf("s3 ");
+		e++;
+	}
+
+	/* division test */
+	f = 362880.0;
+	for(i = 1; i < 10; i++)
+		f /= i;
+	if (f != 1.0){
+		printf("s4 ");
+		e++;
+	}
+
+	/* multiply-accumulate test */
+	f = 0.5;
+	for(i = 1; i < 1000000; i++){
+		f += 2.0;
+		f *= 0.5;
+	}
+	if (f != 2.0){
+		printf("s5 ");
+		e++;
+	}
+
+	/* divide-subtract test */
+	f = 2.0;
+	for(i = 1; i < 1000000; i++){
+		f /= 0.5;
+		f -= 2.0;
+	}
+	if (f != 2.0){
+		printf("s6 ");
+		e++;
+	}
+
+	/* add-multiply-subtract-divide test */
+	f = 1000000.0;
+	for(i = 1; i < 1000000; i++)
+		f = ((((f + 1.5) * 0.5) - 1.25) / 0.5);
+	if (f != 1.0){
+		printf("s7 ");
+		e++;
+	}
+
+	/* multiply-add-divide-subtract test */
+	f = 1.0;
+	for(i = 1; i < 1000000; i++)
+		f = ((((f * 5.0) + 3.0) / 2.0) - 3.0);
+	if (f != 1.0)
+		printf("s8 ");
+
+	/* subtract-divide-add-multiply test */
+	f = 8.0;
+	for(i = 1; i < 1000000; i++)
+		f = ((((f - 5.0) / 2.0) + 2.5) * 2.0);
+	if (f != 8.0){
+		printf("s9 ");
+		e++;
+	}
+
+	/* divide-subtract-multiply-add test */
+	f = 42.0;
+	for(i = 1; i < 1000000; i++)
+		f = ((((f / 6.0) - 5.0) * 19.75 ) + 2.5);
+	if (f != 42.0){
+		printf("s10 ");
+		e++;
+	}
+	if (e){
+		printf("\n");
+		return 1;
+	}
+	return 0;
+}
+
+
+int test_double(){
+	static double f;
+	static int i;
+	static int e = 0;
+
+	/* addition test */
+	f = 1.0;
+	for(i = 0; i < 10; i++)
+		f += (1<<i);
+	if (f != 1024.0){
+		printf("d1 ");
+		e++;
+	}
+
+	/* subtraction test */
+	f = 1024.0;
+	for(i = 0; i < 10; i++)
+		f -= (1<<i);
+	if (f != 1.0){
+		printf("d2 ");
+		e++;
+	}
+
+	/* multiplication test */
+	f = 1.0;
+	for(i = 1; i < 10; i++)
+		f *= i;
+	if (f != 362880.0){
+		printf("d3 ");
+		e++;
+	}
+
+	/* division test */
+	f = 362880.0;
+	for(i = 1; i < 10; i++)
+		f /= i;
+	if (f != 1.0){
+		printf("d4 ");
+		e++;
+	}
+
+	/* multiply-accumulate test */
+	f = 0.5;
+	for(i = 1; i < 1000000; i++){
+		f += 2.0;
+		f *= 0.5;
+	}
+	if (f != 2.0){
+		printf("d5 ");
+		e++;
+	}
+
+	/* divide-subtract test */
+	f = 2.0;
+	for(i = 1; i < 1000000; i++){
+		f /= 0.5;
+		f -= 2.0;
+	}
+	if (f != 2.0){
+		printf("d6 ");
+		e++;
+	}
+
+	/* add-multiply-subtract-divide test */
+	f = 1000000.0;
+	for(i = 1; i < 1000000; i++)
+		f = ((((f + 1.5) * 0.5) - 1.25) / 0.5);
+	if (f != 1.0){
+		printf("d7 ");
+		e++;
+	}
+
+	/* multiply-add-divide-subtract test */
+	f = 1.0;
+	for(i = 1; i < 1000000; i++)
+		f = ((((f * 5.0) + 3.0) / 2.0) - 3.0);
+	if (f != 1.0)
+		printf("d8 ");
+
+	/* subtract-divide-add-multiply test */
+	f = 8.0;
+	for(i = 1; i < 1000000; i++)
+		f = ((((f - 5.0) / 2.0) + 2.5) * 2.0);
+	if (f != 8.0){
+		printf("d9 ");
+		e++;
+	}
+
+	/* divide-subtract-multiply-add test */
+	f = 42.0;
+	for(i = 1; i < 1000000; i++)
+		f = ((((f / 6.0) - 5.0) * 19.75 ) + 2.5);
+	if (f != 42.0){
+		printf("d10 ");
+		e++;
+	}
+	if (e){
+		printf("\n");
+		return 1;
+	}
+	return 0;
+}