tests: Added numerous tests.

The tests are taken almost verbatim from the open source project PicoC. It can
be found at https://code.google.com/p/picoc/.

The tests range from very simple/trivial ones to more complicated. My view is
that the more tests the better. Without tests like this I was very reluctant to
make any changes to tcc for the fear of breaking things.

The tests pass on Win32, OSX, Linux x86 and x86_64. One or two tests fail on
each platform due to differences in the runtime library.

1 files changed, 50 insertions, 0 deletions

diff --git a/tests2/22_floating_point.c b/tests2/22_floating_point.c
new file mode 100644
index 0000000..e3491f5
--- /dev/null
+++ b/tests2/22_floating_point.c
@@ -0,0 +1,50 @@
+#include <stdio.h>
+#include <math.h>
+
+int main()
+{
+   // variables
+   float a = 12.34 + 56.78;
+   printf("%f\n", a);
+
+   // infix operators
+   printf("%f\n", 12.34 + 56.78);
+   printf("%f\n", 12.34 - 56.78);
+   printf("%f\n", 12.34 * 56.78);
+   printf("%f\n", 12.34 / 56.78);
+
+   // comparison operators
+   printf("%d %d %d %d %d %d\n", 12.34 < 56.78, 12.34 <= 56.78, 12.34 == 56.78, 12.34 >= 56.78, 12.34 > 56.78, 12.34 != 56.78);
+   printf("%d %d %d %d %d %d\n", 12.34 < 12.34, 12.34 <= 12.34, 12.34 == 12.34, 12.34 >= 12.34, 12.34 > 12.34, 12.34 != 12.34);
+   printf("%d %d %d %d %d %d\n", 56.78 < 12.34, 56.78 <= 12.34, 56.78 == 12.34, 56.78 >= 12.34, 56.78 > 12.34, 56.78 != 12.34);
+
+   // assignment operators
+   a = 12.34;
+   a += 56.78;
+   printf("%f\n", a);
+
+   a = 12.34;
+   a -= 56.78;
+   printf("%f\n", a);
+
+   a = 12.34;
+   a *= 56.78;
+   printf("%f\n", a);
+
+   a = 12.34;
+   a /= 56.78;
+   printf("%f\n", a);
+
+   // prefix operators
+   printf("%f\n", +12.34);
+   printf("%f\n", -12.34);
+
+   // type coercion
+   a = 2;
+   printf("%f\n", a);
+   printf("%f\n", sin(2));
+
+   return 0;
+}
+
+/* vim: set expandtab ts=4 sw=3 sts=3 tw=80 :*/