From 4d421da90ecd4015320dd36fe203f6ea28f16b18 Mon Sep 17 00:00:00 2001
From: johanknol <johanknol@4a8a32a2-be11-0410-ad9d-d568d2c75423>
Date: Sun, 11 Nov 2001 16:22:09 +0000
Subject: [PATCH] slightly more enhanced fp test

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@1566 4a8a32a2-be11-0410-ad9d-d568d2c75423
---
 support/regression/tests/float.c | 118 ++++++++++++++++++++++++-------
 1 file changed, 94 insertions(+), 24 deletions(-)

diff --git a/support/regression/tests/float.c b/support/regression/tests/float.c
index 2a421144..4ec2e365 100644
--- a/support/regression/tests/float.c
+++ b/support/regression/tests/float.c
@@ -1,25 +1,95 @@
-/* Simple floating pt tests.
- */
-#include <testfwk.h>
-
-void
-testFloatAdd(void)
-{
-  volatile float result, left, right;
-
-  left = 4;
-  right = 5;
-  ASSERT(left+right == 9);
-
-  left = 7;
-  right = -3;
-  ASSERT(left+right == 4);
-
-  left = -1234;
-  right = 409;
-  ASSERT(left+right == (-1234+409));
-
-  left = -34567;
-  right = -123456;
-  ASSERT(left+right == (-34567-123456));
+#if 1
+  // we are in the regression tests
+  #include <testfwk.h>
+  #define DEBUG(x)
+#else
+  // we are standalone
+  #include <stdio.h>
+  #define DEBUG(x) x
+  #define ASSERT(x)
+#endif
+
+volatile float left, right, result;
+
+struct {
+  float left, right, add, sub, mul, div, revdiv;
+} cases[]={
+  //     left  right        add        sub          mul         div   revdiv
+  {      12.8,  25.6,      38.4,     -12.8,      327.68,        0.5,  2},
+  {      12.8, -25.6,     -12.8,      38.4,     -327.68,       -0.5, -2},
+  {     -12.8,  25.6,      12.8,     -38.4,     -327.68,       -0.5, -2},
+  {     -12.8, -25.6,     -38.4,      12.8,      327.68,        0.5,  2},
+  {     100.0,  10.0,     110.0,      90.0,     1000.00,       10.0,  0.1},
+  {    1000.0,  10.0,    1010.0,     990.0,    10000.00,      100.0,  0.01},
+  {   10000.0,  10.0,   10010.0,    9990.0,   100000.00,     1000.0,  0.001},
+  {  100000.0,  10.0,  100010.0,   99990.0,  1000000.00,    10000.0,  0.0001},
+  { 1000000.0,  10.0, 1000010.0,  999990.0, 10000000.00,   100000.0,  0.00001},
+  {10000000.0,  10.0,10000010.0, 9999990.0,100000000.00,  1000000.0,  0.000001},
+  {     0x100,  0x10,     0x110,      0xf0,      0x1000,       0x10,  0.0625},
+  {    0x1000,  0x10,    0x1010,     0xff0,     0x10000,      0x100,  0.00390625},
+  {   0x10000,  0x10,   0x10010,    0xfff0,    0x100000,     0x1000,  0.00024414},
+  {  0x100000,  0x10,  0x100010,   0xffff0,   0x1000000,    0x10000,  0 /* ignore */},
+  { 0x1000000,  0x10, 0x1000010,  0xfffff0,  0x10000000,   0x100000,  0 /* ignore */},
+  {0x10000000,  0x10,0x10000010, 0xffffff0, 0x100000000,  0x1000000,  0 /* ignore */},
+};
+
+int tests=0, errors=0;
+
+char compare (float is, float should) {
+  float diff = should ? is/should : 0;
+  tests++;
+  DEBUG(printf (" %1.3f (%f %f) ", is, should, diff));
+
+  if (should==0) {
+    DEBUG(printf ("IGNORED!\n"));
+    return 0;
+  }
+
+  // skip the fp roundoff errors
+  if (diff>0.999999 && diff<1.00001) {
+    DEBUG(printf ("OK!\n"));
+    ASSERT(1);
+    return 0;
+  } else {
+    errors++;
+    DEBUG(printf ("FAIL!\n"));
+    ASSERT(0);
+    return 1;
+  }
+}
+
+void testFloatMath(void) {
+  int i;
+  int t = sizeof(cases)/sizeof(cases[0]);
+  float result;
+
+  for (i=0; i<t; i++) {
+    // add
+    result=cases[i].left+cases[i].right;
+    DEBUG(printf ("%1.3f + %1.3f =", cases[i].left, cases[i].right));
+    compare(result, cases[i].add);
+    // sub
+    result=cases[i].left-cases[i].right;
+    DEBUG(printf ("%1.3f - %1.3f =", cases[i].left, cases[i].right));
+    compare(result, cases[i].sub);
+    // mul
+    result=cases[i].left*cases[i].right;
+    DEBUG(printf ("%1.3f * %1.3f =", cases[i].left, cases[i].right));
+    compare(result, cases[i].mul);
+    // div
+    result=cases[i].left/cases[i].right;
+    DEBUG(printf ("%1.3f / %1.3f =", cases[i].left, cases[i].right));
+    compare(result, cases[i].div);
+    // revdiv
+    result=cases[i].right/cases[i].left;
+    DEBUG(printf ("%1.3f / %1.3f =", cases[i].right, cases[i].left));
+    compare(result, cases[i].revdiv);
+  }
+  DEBUG(printf ("%d tests, %d errors\n", tests, errors));
+}
+
+#ifndef REENTRANT
+void main(void) {
+  testFloatMath();
 }
+#endif
-- 
2.47.2