tests/test_power2funcs.cpp

   1 //===-- tests/test_power2funcs.cpp ------------------------------*- C++ -*-===//
   2 // Test of certain compile-time/run-time functions relating to powers of 2.
   3 //
   4 // Copyright (C) 2013-2014 Dirk Steinke.
   5 // See copyright and license notice in COPYRIGHT or include/jitcs.h
   6 //===----------------------------------------------------------------------===//
   7
   8 #include "jitcs_int_power2funcs.h"
   9 #include "unittest.h"
  10
  11 using namespace jitcs;
  12
  13 static void test(UnitTest& t) {
  14   t.check("IsPowerOf2OrZeroCT/0", IsPowerOf2OrZeroCT<0>::Val == true);
  15   t.check("IsPowerOf2OrZeroCT/3", IsPowerOf2OrZeroCT<3>::Val == false);
  16   t.check("IsPowerOf2OrZeroCT/4", IsPowerOf2OrZeroCT<4>::Val == true);
  17   t.check("IsPowerOf2CT/0", IsPowerOf2CT<0>::Val == false);
  18   t.check("IsPowerOf2CT/3", IsPowerOf2CT<3>::Val == false);
  19   t.check("IsPowerOf2CT/4", IsPowerOf2CT<4>::Val == true);
  20   t.check("Log2CT/1", Log2CT<1>::Val == 0);
  21   t.check("Log2CT/4", Log2CT<4>::Val == 2);
  22   t.check("Log2CT/5", Log2CT<5>::Val == 2);
  23   t.check("RoundUpToPowerOf2CT/16,16", RoundUpToPowerOf2CT<16,16>::Val == 16);
  24   t.check("RoundUpToPowerOf2CT/20,16", RoundUpToPowerOf2CT<20,16>::Val == 32);
  25
  26   t.check("IsPowerOf2OrZero/0", IsPowerOf2OrZero(0) == true);
  27   t.check("IsPowerOf2OrZero/3", IsPowerOf2OrZero(3) == false);
  28   t.check("IsPowerOf2OrZero/4", IsPowerOf2OrZero(4) == true);
  29   t.check("IsPowerOf2/0", IsPowerOf2(0) == false);
  30   t.check("IsPowerOf2/3", IsPowerOf2(3) == false);
  31   t.check("IsPowerOf2/4", IsPowerOf2(4) == true);
  32   t.check("RoundUpToPowerOf2/16,T16", RoundUpToPowerOf2<16>(16) == 16);
  33   t.check("RoundUpToPowerOf2/20,T16", RoundUpToPowerOf2<16>(20) == 32);
  34   t.check("RoundUpToPowerOf2/16,16", RoundUpToPowerOf2(16,16) == 16);
  35   t.check("RoundUpToPowerOf2/20,16", RoundUpToPowerOf2(20,16) == 32);
  36   t.check("DivRoundedUpByPowerOf2/16,T16", DivRoundedUpByPowerOf2<16>(16) == 1);
  37   t.check("DivRoundedUpByPowerOf2/20,T16", DivRoundedUpByPowerOf2<16>(20) == 2);
  38 }
  39
  40 static UnitTestRun _1("ADT/PowerOf2Funcs", test);