/*---------------------------------------------------------------------------*
  Project:  TwlSDK - MATH - demos
  File:     main.c

  Copyright 2007-2008 Nintendo. All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law. They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Date:: 2008-09-18#$
  $Rev: 8573 $
  $Author: okubata_ryoma $
 *---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*
  Demo for checking the operations of the MATH library API
 *---------------------------------------------------------------------------*/

#include    <nitro.h>



static void VBlankIntr(void);
static void DisplayInit(void);
static void FillScreen(u16 col);
static BOOL MathTest(void);

/*---------------------------------------------------------------------------*
    Variable Definitions
 *---------------------------------------------------------------------------*/

/*---------------------------------------------------------------------------*
    Function Definitions
 *---------------------------------------------------------------------------*/

/*---------------------------------------------------------------------------*
  Name:         NitroMain

  Description:  Initialization and main loop.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
void NitroMain(void)
{
    // Various types of initialization
    OS_Init();

    DisplayInit();

    if (MathTest())
    {
        // Success
        OS_TPrintf("------ Test Succeeded ------\n");
        FillScreen(GX_RGB(0, 31, 0));
    }
    else
    {
        // Failed
        OS_TPrintf("****** Test Failed ******\n");
        FillScreen(GX_RGB(31, 0, 0));
    }

    // Main loop
    while (TRUE)
    {
        // Waiting for the V-Blank
        OS_WaitVBlankIntr();
    }
}

/*---------------------------------------------------------------------------*
  Name:         VBlankIntr

  Description:  V-Blank interrupt vector.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void VBlankIntr(void)
{
    // sets the IRQ check flag
    OS_SetIrqCheckFlag(OS_IE_V_BLANK);
}

/*---------------------------------------------------------------------------*
  Name:         DisplayInit

  Description:  Graphics Initialization

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void DisplayInit(void)
{

    GX_Init();
    FX_Init();

    GX_DispOff();
    GXS_DispOff();

    GX_SetDispSelect(GX_DISP_SELECT_SUB_MAIN);

    OS_SetIrqFunction(OS_IE_V_BLANK, VBlankIntr);
    (void)OS_EnableIrqMask(OS_IE_V_BLANK);
    (void)GX_VBlankIntr(TRUE);         // To generate V-Blank interrupt request
    (void)OS_EnableIrq();


    GX_SetBankForLCDC(GX_VRAM_LCDC_ALL);
    MI_CpuClearFast((void *)HW_LCDC_VRAM, HW_LCDC_VRAM_SIZE);

    MI_CpuFillFast((void *)HW_OAM, 192, HW_OAM_SIZE);   // Clear OAM
    MI_CpuClearFast((void *)HW_PLTT, HW_PLTT_SIZE);     // Clear the standard palette

    MI_CpuFillFast((void *)HW_DB_OAM, 192, HW_DB_OAM_SIZE);     // Clear OAM
    MI_CpuClearFast((void *)HW_DB_PLTT, HW_DB_PLTT_SIZE);       // Clear the standard palette
    MI_DmaFill32(3, (void *)HW_LCDC_VRAM_C, 0x7FFF7FFF, 256 * 192 * sizeof(u16));


    GX_SetBankForOBJ(GX_VRAM_OBJ_256_AB);       // Set VRAM-A,B for OBJ

    GX_SetGraphicsMode(GX_DISPMODE_VRAM_C,      // VRAM mode
                       (GXBGMode)0,    // Dummy
                       (GXBG0As)0);    // Dummy

    GX_SetVisiblePlane(GX_PLANEMASK_OBJ);       // Make OBJs visible
    GX_SetOBJVRamModeBmp(GX_OBJVRAMMODE_BMP_1D_128K);   // 2D mapping OBJ

    OS_WaitVBlankIntr();               // Waiting for the end of the V-Blank interrupt
    GX_DispOn();

}


/*---------------------------------------------------------------------------*
  Name:         FillScreen

  Description:  Fills the screen

  Arguments:    col: FillColor

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void FillScreen(u16 col)
{
    MI_CpuFill16((void *)HW_LCDC_VRAM_C, col, 256 * 192 * 2);
}

/*---------------------------------------------------------------------------*
  Name:         MathTest

  Description:  Test routine for mathematical functions

  Arguments:    None.

  Returns:      TRUE if test succeeds.
 *---------------------------------------------------------------------------*/
#define PrintResultEq( a, b, f ) \
    { OS_TPrintf( ((a) == (b)) ? "[--OK--] " : "[**NG**] " ); (f) = (f) && ((a) == (b)); }

static BOOL MathTest(void)
{
    int     i;
    BOOL    flag = TRUE;

    {
        int     a[] = { 0, 1, 0x7fffffff, -1, -0x80000000 };
        int     result_abs[] = { 0, 1, 0x7fffffff, 1, -0x80000000 };
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_ABS(a[i]);
            PrintResultEq(result, result_abs[i], flag);
            OS_TPrintf("MATH_ABS(%d) = %d\n", a[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_IAbs(a[i]);
            PrintResultEq(result, result_abs[i], flag);
            OS_TPrintf("MATH_IAbs(%d) = %d\n", a[i], result);
        }
    }

    {
        // TODO: NaN and subnormal numbers; also check -0.0
        double  a[] = { 0, 1, -1, 1.0e20, 1.123e-20, -1.0e20, -1.123e-20 };
        double  result_abs[] = { 0, 1, 1, 1.0e20, 1.123e-20, 1.0e20, 1.123e-20 };
        for (i = 0; i < sizeof(a) / sizeof(double); i++)
        {
            double  result;
            result = MATH_ABS(a[i]);
            PrintResultEq(result, result_abs[i], flag);
            OS_Printf("MATH_ABS(%g) = %g\n", a[i], result);
        }
    }

    {
        int     a[] = { 0, 1, 0, -1, 0, 32, 31, -32, -31 };
        int     b[] = { 0, 0, 1, 0, -1, 31, 32, -31, -32 };
        int     result_min[] = { 0, 0, 0, -1, -1, 31, 31, -32, -32 };
        int     result_max[] = { 0, 1, 1, 0, 0, 32, 32, -31, -31 };
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_MIN(a[i], b[i]);
            PrintResultEq(result, result_min[i], flag);
            OS_TPrintf("MATH_MIN(%d, %d) = %d\n", a[i], b[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_IMin(a[i], b[i]);
            PrintResultEq(result, result_min[i], flag);
            OS_TPrintf("MATH_IMin(%d, %d) = %d\n", a[i], b[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_MAX(a[i], b[i]);
            PrintResultEq(result, result_max[i], flag);
            OS_TPrintf("MATH_MAX(%d, %d) = %d\n", a[i], b[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_IMax(a[i], b[i]);
            PrintResultEq(result, result_max[i], flag);
            OS_TPrintf("MATH_IMax(%d, %d) = %d\n", a[i], b[i], result);
        }
    }

    {
        // TODO: NaN and subnormal numbers; also check -0.0
        double  a[] = { 0, 1, 0, -1, 0, 1.0e15, 1.0e-15, 1.0e-15, 1.0e-16, -1.0e-15, -1.1e-15 };
        double  b[] = { 0, 0, 1, 0, -1, 1.0e-15, 1.0e15, 1.0e-16, 1.0e-15, -1.1e-15, -1.0e-15 };
        double  result_min[] =
            { 0, 0, 0, -1, -1, 1.0e-15, 1.0e-15, 1.0e-16, 1.0e-16, -1.1e-15, -1.1e-15 };
        double  result_max[] =
            { 0, 1, 1, 0, 0, 1.0e15, 1.0e15, 1.0e-15, 1.0e-15, -1.0e-15, -1.0e-15 };
        for (i = 0; i < sizeof(a) / sizeof(double); i++)
        {
            double  result;
            result = MATH_MIN(a[i], b[i]);
            PrintResultEq(result, result_min[i], flag);
            OS_Printf("MATH_MIN(%g, %g) = %g\n", a[i], b[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(double); i++)
        {
            double  result;
            result = MATH_MAX(a[i], b[i]);
            PrintResultEq(result, result_max[i], flag);
            OS_Printf("MATH_MAX(%g, %g) = %g\n", a[i], b[i], result);
        }
    }

    {
        int     a[] = { -2, -1, 0, 1, 2, 0, 10, -2, -10, -0x80000000, 0x7fffffff };
        int     low[] = { -1, -1, -1, -1, -1, 1, 2, -8, -8, -0x80000000, -0x80000000 };
        int     high[] = { 1, 1, 1, 1, 1, 1, 8, -4, -4, 0x7fffffff, 0x7fffffff };
        int     result_clp[] = { -1, -1, 0, 1, 1, 1, 8, -4, -8, -0x80000000, 0x7fffffff };
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_CLAMP(a[i], low[i], high[i]);
            PrintResultEq(result, result_clp[i], flag);
            OS_TPrintf("MATH_CLAMP(%d, %d, %d) = %d\n", a[i], low[i], high[i], result);
        }
    }

    {
        int     a[] = { 0, 1, 31, 32, 33, 128, -1, -31, -32, -33, 0x7fffffff, -0x80000000 };
        int     result_rup[] = { 0, 32, 32, 32, 64, 128, 0, 0, -32, -32, -0x80000000, -0x80000000 };
        int     result_rdn[] =
            { 0, 0, 0, 32, 32, 128, -32, -32, -32, -64, 0x7fffffe0, -0x80000000 };
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_ROUNDUP(a[i], 32);
            PrintResultEq(result, result_rup[i], flag);
            OS_TPrintf("MATH_ROUNDUP(%d, 32) = %d\n", a[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_ROUNDUP32(a[i]);
            PrintResultEq(result, result_rup[i], flag);
            OS_TPrintf("MATH_ROUNDUP32(%d) = %d\n", a[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_ROUNDDOWN(a[i], 32);
            PrintResultEq(result, result_rdn[i], flag);
            OS_TPrintf("MATH_ROUNDDOWN(%d, 32) = %d\n", a[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_ROUNDDOWN32(a[i]);
            PrintResultEq(result, result_rdn[i], flag);
            OS_TPrintf("MATH_ROUNDDOWN32(%d) = %d\n", a[i], result);
        }
    }

    {
        u32     a[] =
            { 0, 1, 0xffffffff, 0xffff0000, 0x0000ffff, 0xaaaaaaaa, 0x55555555, 0x1234cdef };
        int     result_clz[] = { 32, 31, 0, 0, 16, 0, 1, 3 };
        int     result_ctz[] = { 32, 0, 0, 16, 0, 1, 0, 0 };
        u32     result_lsb[] = { 0, 1, 1, 0x00010000, 1, 0x00000002, 0x00000001, 0x00000001 };
        u32     result_msb[] =
            { 0, 1, 0x80000000, 0x80000000, 0x00008000, 0x80000000, 0x40000000, 0x10000000 };
        int     result_pop[] = { 0, 1, 32, 16, 16, 16, 16, 17 };
        int     result_lg2[] = { -1, 0, 31, 31, 15, 31, 30, 28 };
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            u32     result;
            result = MATH_CountLeadingZeros(a[i]);
            PrintResultEq(result, result_clz[i], flag);
            OS_TPrintf("MATH_CountLeadingZeros(0x%08x) = %d\n", a[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            u32     result;
            result = MATH_CLZ(a[i]);
            PrintResultEq(result, result_clz[i], flag);
            OS_TPrintf("MATH_CLZ(0x%08x) = %d\n", a[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            u32     result;
            result = MATH_CTZ(a[i]);
            PrintResultEq(result, result_ctz[i], flag);
            OS_TPrintf("MATH_CTZ(0x%08x) = %d\n", a[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            u32     result;
            result = MATH_LSB(a[i]);
            PrintResultEq(result, result_lsb[i], flag);
            OS_TPrintf("MATH_LSB(0x%08x) = %08x\n", a[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            u32     result;
            result = MATH_MSB(a[i]);
            PrintResultEq(result, result_msb[i], flag);
            OS_TPrintf("MATH_MSB(0x%08x) = %08x\n", a[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_CountPopulation(a[i]);
            PrintResultEq(result, result_pop[i], flag);
            OS_TPrintf("MATH_CountPoulation(0x%08x) = %d\n", a[i], result);
        }
        for (i = 0; i < sizeof(a) / sizeof(int); i++)
        {
            int     result;
            result = MATH_ILog2(a[i]);
            PrintResultEq(result, result_lg2[i], flag);
            OS_TPrintf("MATH_ILog2(0x%08x) = %d\n", a[i], result);

        }
    }

    return flag;
}

/*---------------------------------------------------------------------------*
  End of file
 *---------------------------------------------------------------------------*/