1 files changed, 118 insertions, 0 deletions
diff --git a/libc/i386fp/test.c b/libc/i386fp/test.c
new file mode 100644
index 0000000..bd92581
--- /dev/null
+++ b/libc/i386fp/test.c
@@ -0,0 +1,118 @@
+#include <sys/times.h>
+#include <limits.h>
+#include <stdio.h>
+#include <time.h>
+
+#define CONVTYPE	int
+#define MAX		(MIN + NITER - 1)
+#define MIN		INT_MIN
+
+#define NITER	1000000
+
+double one = 1;
+double two = 2;
+double big = 1e99;
+
+double d;
+double d1;
+float f;
+
+int main()
+{
+    CONVTYPE cti;
+    CONVTYPE cto;
+    clock_t delta;
+    struct tms finish;
+    int i;
+    struct tms start;
+
+#if 0
+    times(&start);
+    for (cti = MIN; cti <= MAX; ++cti)
+    {
+	d = cti;
+	cto = d;
+	if (cti != cto)
+	    printf("%08x %08x\n", cti, cto);
+	if (cti % 10000000 == 0)
+	{
+	    printf("%8x ok ", cti);
+	    fflush(stdout);
+	}
+    }
+    times(&finish);
+    delta = finish.tms_utime - start.tms_utime;
+    printf("Time for %d i -> d and d -> i conversions was %g s (%d t)\n",
+	   MAX - MIN + 1, delta / (double) CLOCKS_PER_SEC, delta);
+#endif
+
+    times(&start);
+    for (cti = MIN; cti <= MAX; ++cti)
+	d = cti;
+    times(&finish);
+    delta = finish.tms_utime - start.tms_utime;
+    printf("Time for %d i -> d conversions was %g s (%d t)\n",
+	   MAX - MIN + 1, delta / (double) CLOCKS_PER_SEC, delta);
+
+    times(&start);
+    for (cti = MIN; cti <= MAX; ++cti)
+    {
+	d = cti;
+	cto = d;
+    }
+    times(&finish);
+    delta = finish.tms_utime - start.tms_utime - delta;
+    printf("Time for %d d -> i conversions was %g s (%d t)\n",
+	   MAX - MIN + 1, delta / (double) CLOCKS_PER_SEC, delta);
+
+    d = 0;
+    times(&start);
+    for (i = 0; i < NITER; ++i)
+	d = d + 1;
+    times(&finish);
+    delta = finish.tms_utime - start.tms_utime;
+    printf("Time for adding %d 1.0's to 0.0 was %g s (%d t), result = %g\n",
+	   NITER, delta / (double) CLOCKS_PER_SEC, delta, d);
+
+    d = 0;
+    times(&start);
+    for (; d < NITER;)
+	d = d + 1;
+    times(&finish);
+    delta = finish.tms_utime - start.tms_utime;
+    printf("Time for adding %d 1.0's to 0.0 (d index) was %g s (%d t), result = %g\n",
+	   NITER, delta / (double) CLOCKS_PER_SEC, delta, d);
+
+    times(&start);
+    for (i = 1; i <= NITER; ++i)
+    {
+	d1 = i;
+	d = d1 * d1;
+    }
+    times(&finish);
+    delta = finish.tms_utime - start.tms_utime;
+    printf("Time for %d mults was %g s (%d t), result = %g\n",
+	   NITER, delta / (double) CLOCKS_PER_SEC, delta, d);
+
+    times(&start);
+    for (i = 1; i <= NITER; ++i)
+    {
+	d1 = i;
+	d = 1 / d1;
+    }
+    times(&finish);
+    delta = finish.tms_utime - start.tms_utime;
+    printf("Time for %d divs was %g s (%d t), result = %g\n",
+	   NITER, delta / (double) CLOCKS_PER_SEC, delta, d);
+
+    f = 0;
+    times(&start);
+    for (i = 0; i < NITER; ++i)
+	f = f + 1;
+    times(&finish);
+    delta = finish.tms_utime - start.tms_utime;
+    printf("Time for adding %d 1.0f's to 0.0f was %g s (%d t), result = %g\n",
+	   NITER, delta / (double) CLOCKS_PER_SEC, delta, f);
+
+    return 0;
+}