Initial revision

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 52 insertions, 0 deletions

diff --git a/tests/tcmp2.c b/tests/tcmp2.c
new file mode 100644
index 000000000..c4c080b97
--- /dev/null
+++ b/tests/tcmp2.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include "gmp.h"
+#include "longlong.h"
+#include "mpfr.h"
+
+double drand()
+{
+  double d; long int *i;
+
+  i = (long int*) &d;
+  i[0] = lrand48();
+  i[1] = lrand48();
+  return d;
+}
+
+void tcmp2(x, y, i) double x, y; int i;
+{
+  mpfr_t xx,yy; int j;
+
+  if (i==-1) i = (int) floor(log(x)/log(2.0)) - (int) floor(log(x-y)/log(2.0));
+  mpfr_init2(xx, 53); mpfr_init2(yy, 53);
+  mpfr_set_d(xx, x, 0);
+  mpfr_set_d(yy, y, 0);
+  if ((j=mpfr_cmp2(xx, yy)) != i) {
+    printf("Error in mpfr_cmp2: x=%1.16e y=%1.16e mpfr_cmp(x,y)=%d instead of %d\n",x,y,j,i); 
+    exit(1);
+  }
+  mpfr_clear(xx); mpfr_clear(yy);
+}
+
+void main()
+{
+  int i,j; double x=1.0, y, z;
+
+  tcmp2(1.06022698059744327881e+71, 1.05824655795525779205e+71, -1);
+  tcmp2(1.0, 1.0, 53);
+  for (i=0;i<54;i++) {
+    tcmp2(1.0, 1.0-x, i);
+    x /= 2.0;
+  }
+  for (j=0;j<1000000;j++) {
+    x = drand(); if (x<0) x = -x;
+    y = drand(); if (y<0) y = -y;
+    if (!isnan(x) && !isnan(y)) {
+      if (x<y) { z=x; x=y; y=z; }
+      tcmp2(x, y, -1);
+    }
+  }
+}
+