hw_reg_compile_tests.cpp

/*
--------------------------------------------------------------------------------

Hardware Register C++ template class compile-time tests

Copyright (c) 2012, Oleg Endo
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holders nor the names of any
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

--------------------------------------------------------------------------------

Example how to compile this file:
  g++ -std=c++11 -O2 hw_reg_compile_tests.cpp

--------------------------------------------------------------------------------
*/


#define __HW_REG_BEGIN_NAMESPACE__ namespace test_namespace {
#define __HW_REG_END_NAMESPACE__ }
#define __HW_REG_USE_NAMESPACE test_namespace::

#include "hw_reg.hpp"

using namespace test_namespace;

struct regs
{
  hw_reg_rw	<int32_t> rw_reg;	// read-write register variable
  hw_reg_r	<int32_t> r_reg;	// read-only register variable
  hw_reg_w	<int32_t> w_reg;	// write-only register variable
  hw_reg_rw	<float> float_reg;	// read-write register variable
};

int test_00 (regs& r)
{
  return r.rw_reg;	// reading read/write: OK
}

int test_01 (regs& r)
{
//  return r.w_reg;	// reading write-only: compile time error
  return 0;
}

int test_02 (regs& r)
{
  return r.r_reg;	// reading read-only: OK
}

int test_03 (regs& r, int x)
{
//r.r_reg = x;		// writing read-only: compile time error
  return 0;
}

int test_04 (regs& r, int x)
{
  r.rw_reg = x;		// writing read-write: OK
  return 0;
}

int test_05 (regs& r, int x)
{
  r.w_reg = x;		// writing write-only: OK
  r.w_reg = x;
  return 0;
}

int test_06 (regs& r)
{
  return +r.r_reg;
}

int test_07 (regs& r)
{
  return -r.r_reg;
}

int test_08 (regs& r, int x)
{
  return r.rw_reg += x;
}

int test_09 (regs& r, int x)
{
  return r.rw_reg <<= 8;
}

float test_10 (regs& r, float x)
{
  return r.float_reg;
}

float test_11 (regs& r, float x)
{
  return r.r_reg + x;
}

float test_12 (regs& r, int x)
{
  return (float)r.r_reg;
}

bool test_13 (regs& r, float x)
{
  return r.r_reg < x;
}

bool test_14 (regs& r, float x)
{
  return x < r.r_reg;
}

bool test_15 (regs& r)
{
  return !r.r_reg;
}

void test_16 (regs& r, int x)
{
  r.rw_reg &= x;
}

volatile void* test_17 (regs& r, int x)
{
  return &r.w_reg;
}

int test_18 (regs& r)
{
  return r.r_reg >> 1;
}

int test_19 (void)
{
  hw_reg_rw<int32_t, const_addr<0xA0001240>> reg; // OK
  return reg + 5;
}

int test_20 (void)
{
// NG: compile-time error
//hw_reg_rw<int32_t, std::integral_constant<uintptr_t, 0xA0001240>> reg;
  return 0;
}

int test_21 (void)
{
  static constexpr hw_reg_rw<int32_t, const_addr<0xA0001240>> reg; // OK
  return reg + 5;
}

static constexpr hw_reg_rw<int32_t, const_addr<0xA0001240>> g_reg_0; // OK
static constexpr hw_reg_rw<int32_t, const_addr<0xA0001244>> g_reg_1;
static constexpr hw_reg_rw<int32_t, const_addr<0xA0001248>> g_reg_2;
static constexpr hw_reg_rw<int32_t, const_addr<0xA000124C>> g_reg_3;

int test_23 (void)
{
  return g_reg_0 + g_reg_1 + g_reg_2 + g_reg_3;
}

void* test_24 (regs& r)
{
  return &r.float_reg;
}

int32_t test_25 (regs& r)
{
  return r.r_reg.read ();
}

void test_26 (regs& r, int32_t val)
{
  r.w_reg.write (val);
}


int main (void)
{
  return 0;
}