timesoftfloat.c

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/*============================================================================

This C source file is part of the SoftFloat IEC/IEEE Floating-point Arithmetic
Package, Release 2b.

Written by John R. Hauser.

THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort has
been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ALL LOSSES,
COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE
EFFECTIVELY INDEMNIFY THE AUTHOR, JOHN HAUSER, (possibly via similar legal
warning) AGAINST ALL LOSSES, COSTS, OR OTHER PROBLEMS INCURRED BY THEIR
CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE.

Derivative works are acceptable, even for commercial purposes, so long as
(1) the source code for the derivative work includes prominent notice that
the work is derivative, and (2) the source code includes prominent notice with
these four paragraphs for those parts of this code that are retained.

=============================================================================*/

#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include <time.h>
#include "milieu.h"
#include "softfloat.h"

enum {
    minIterations = 1000
};

static void fail( const char *message, ... )
{
    va_list varArgs;

    fputs( "timesoftfloat: ", stderr );
    va_start( varArgs, message );
    vfprintf( stderr, message, varArgs );
    va_end( varArgs );
    fputs( ".\n", stderr );
    exit( EXIT_FAILURE );

}

static char *functionName;
static char *roundingPrecisionName, *roundingModeName, *tininessModeName;

static void reportTime( int32 count, long clocks )
{

    printf(
        "%8.1f kops/s: %s",
        ( count / ( ( (float) clocks ) / CLOCKS_PER_SEC ) ) / 1000,
        functionName
    );
    if ( roundingModeName ) {
        if ( roundingPrecisionName ) {
            fputs( ", precision ", stdout );
            fputs( roundingPrecisionName, stdout );
        }
        fputs( ", rounding ", stdout );
        fputs( roundingModeName, stdout );
        if ( tininessModeName ) {
            fputs( ", tininess ", stdout );
            fputs( tininessModeName, stdout );
            fputs( " rounding", stdout );
        }
    }
    fputc( '\n', stdout );

}

enum {
    numInputs_int32 = 32
};

static const int32 inputs_int32[ numInputs_int32 ] = {
    0xFFFFBB79, 0x405CF80F, 0x00000000, 0xFFFFFD04,
    0xFFF20002, 0x0C8EF795, 0xF00011FF, 0x000006CA,
    0x00009BFE, 0xFF4862E3, 0x9FFFEFFE, 0xFFFFFFB7,
    0x0BFF7FFF, 0x0000F37A, 0x0011DFFE, 0x00000006,
    0xFFF02006, 0xFFFFF7D1, 0x10200003, 0xDE8DF765,
    0x00003E02, 0x000019E8, 0x0008FFFE, 0xFFFFFB5C,
    0xFFDF7FFE, 0x07C42FBF, 0x0FFFE3FF, 0x040B9F13,
    0xBFFFFFF8, 0x0001BF56, 0x000017F6, 0x000A908A
};

static void time_a_int32_z_float32( float32 function( int32 ) )
{
    clock_t startClock, endClock;
    int32 count, i;
    int8 inputNum;

    count = 0;
    inputNum = 0;
    startClock = clock();
    do {
        for ( i = minIterations; i; --i ) {
            function( inputs_int32[ inputNum ] );
            inputNum = ( inputNum + 1 ) & ( numInputs_int32 - 1 );
        }
        count += minIterations;
    } while ( clock() - startClock < CLOCKS_PER_SEC );
    inputNum = 0;
    startClock = clock();
    for ( i = count; i; --i ) {
        function( inputs_int32[ inputNum ] );
        inputNum = ( inputNum + 1 ) & ( numInputs_int32 - 1 );
    }
    endClock = clock();
    reportTime( count, endClock - startClock );

}

static void time_a_int32_z_float64( float64 function( int32 ) )
{
    clock_t startClock, endClock;
    int32 count, i;
    int8 inputNum;

    count = 0;
    inputNum = 0;
    startClock = clock();
    do {
        for ( i = minIterations; i; --i ) {
            function( inputs_int32[ inputNum ] );
            inputNum = ( inputNum + 1 ) & ( numInputs_int32 - 1 );
        }
        count += minIterations;
    } while ( clock() - startClock < CLOCKS_PER_SEC );
    inputNum = 0;
    startClock = clock();
    for ( i = count; i; --i ) {
        function( inputs_int32[ inputNum ] );
        inputNum = ( inputNum + 1 ) & ( numInputs_int32 - 1 );
    }
    endClock = clock();
    reportTime( count, endClock - startClock );

}

#ifdef FLOATX80

static void time_a_int32_z_floatx80( floatx80 function( int32 ) )
{
    clock_t startClock, endClock;
    int32 count, i;
    int8 inputNum;

    count = 0;
    inputNum = 0;
    startClock = clock();
    do {
        for ( i = minIterations; i; --i ) {
            function( inputs_int32[ inputNum ] );
            inputNum = ( inputNum + 1 ) & ( numInputs_int32 - 1 );
        }
        count += minIterations;
    } while ( clock() - startClock < CLOCKS_PER_SEC );
    inputNum = 0;
    startClock = clock();
    for ( i = count; i; --i ) {
        function( inputs_int32[ inputNum ] );
        inputNum = ( inputNum + 1 ) & ( numInputs_int32 - 1 );
    }
    endClock = clock();
    reportTime( count, endClock - startClock );

}

#endif

#ifdef FLOAT128

static void time_a_int32_z_float128( float128 function( int32 ) )
{
    clock_t startClock, endClock;
    int32 count, i;
    int8 inputNum;

    count = 0;
    inputNum = 0;
    startClock = clock();
    do {
        for ( i = minIterations; i; --i ) {
            function( inputs_int32[ inputNum ] );
            inputNum = ( inputNum + 1 ) & ( numInputs_int32 - 1 );
        }
        count += minIterations;
    } while ( clock() - startClock < CLOCKS_PER_SEC );
    inputNum = 0;
    startClock = clock();
    for ( i = count; i; --i ) {
        function( inputs_int32[ inputNum ] );
        inputNum = ( inputNum + 1 ) & ( numInputs_int32 - 1 );
    }
    endClock = clock();
    reportTime( count, endClock - startClock );

}

#endif

enum {
    numInputs_int64 = 32
};

static const int64 inputs_int64[ numInputs_int64 ] = {
    LIT64( 0xFBFFC3FFFFFFFFFF ),
    LIT64( 0x0000000003C589BC ),
    LIT64( 0x00000000400013FE ),
    LIT64( 0x0000000000186171 ),
    LIT64( 0xFFFFFFFFFFFEFBFA ),
    LIT64( 0xFFFFFD79E6DFFC73 ),
    LIT64( 0x0000000010001DFF ),
    LIT64( 0xDD1A0F0C78513710 ),
    LIT64( 0xFFFF83FFFFFEFFFE ),
    LIT64( 0x00756EBD1AD0C1C7 ),
    LIT64( 0x0003FDFFFFFFFFBE ),
    LIT64( 0x0007D0FB2C2CA951 ),
    LIT64( 0x0007FC0007FFFFFE ),
    LIT64( 0x0000001F942B18BB ),
    LIT64( 0x0000080101FFFFFE ),
    LIT64( 0xFFFFFFFFFFFF0978 ),
    LIT64( 0x000000000008BFFF ),
    LIT64( 0x0000000006F5AF08 ),
    LIT64( 0xFFDEFF7FFFFFFFFE ),
    LIT64( 0x0000000000000003 ),
    LIT64( 0x3FFFFFFFFF80007D ),
    LIT64( 0x0000000000000078 ),
    LIT64( 0xFFF80000007FDFFD ),
    LIT64( 0x1BBC775B78016AB0 ),
    LIT64( 0xFFF9001FFFFFFFFE ),
    LIT64( 0xFFFD4767AB98E43F ),
    LIT64( 0xFFFFFEFFFE00001E ),
    LIT64( 0xFFFFFFFFFFF04EFD ),
    LIT64( 0x07FFFFFFFFFFF7FF ),
    LIT64( 0xFFFC9EAA38F89050 ),
    LIT64( 0x00000020FBFFFFFE ),
    LIT64( 0x0000099AE6455357 )
};

static void time_a_int64_z_float32( float32 function( int64 ) )
{
    clock_t startClock, endClock;
    int32 count, i;
    int8 inputNum;

    count = 0;
    inputNum = 0;
    startClock = clock();
    do {
        for ( i = minIterations; i; --i ) {
            function( inputs_int64[ inputNum ] );
            inputNum = ( inputNum + 1 ) & ( numInputs_int64 - 1 );
        }
        count += minIterations;
    } while ( clock() - startClock < CLOCKS_PER_SEC );
    inputNum = 0;
    startClock = clock();
    for ( i = count; i; --i ) {
        function( inputs_int64[ inputNum ] );
        inputNum = ( inputNum + 1 ) & ( numInputs_int64 - 1 );
    }
    endClock = clock();
    reportTime( count, endClock - startClock );

}

static void time_a_int64_z_float64( float64 function( int64 ) )
{
    clock_t startClock, endClock;
    int32 count, i;
    int8 inputNum;

    count = 0;
    inputNum = 0;
    startClock = clock();
    do {
        for ( i = minIterations; i; --i ) {
            function( inputs_int64[ inputNum ] );
            inputNum = ( inputNum + 1 ) & ( numInputs_int64 - 1 );
        }
        count += minIterations;
    } while ( clock() - startClock < CLOCKS_PER_SEC );
    inputNum = 0;
    startClock = clock();
    for ( i = count; i; --i ) {
        function( inputs_int64[ inputNum ] );
        inputNum = ( inputNum + 1 ) & ( numInputs_int64 - 1 );
    }
    endClock = clock();
    reportTime( count, endClock - startClock );

}

#ifdef FLOATX80

static void time_a_int64_z_floatx80( floatx80 function( int64 ) )
{
    clock_t startClock, endClock;
    int32 count, i;
    int8 inputNum;

    count = 0;
    inputNum = 0;
    startClock = clock();
    do {
        for ( i = minIterations; i; --i ) {
            function( inputs_int64[ inputNum ] );
            inputNum = ( inputNum + 1 ) & ( numInputs_int64 - 1 );
        }
        count += minIterations;
    } while ( clock() - startClock < CLOCKS_PER_SEC );
    inputNum = 0;
    startClock = clock();
    for ( i = count; i; --i ) {
        function( inputs_int64[ inputNum ] );
        inputNum = ( inputNum + 1 ) & ( numInputs_int64 - 1 );
    }
    endClock = clock();
    reportTime( count, endClock - startClock );

}

#endif

#ifdef FLOAT128

static void time_a_int64_z_float128( float128 function( int64 ) )
{
    clock_t startClock, endClock;
    int32 count, i;
    int8 inputNum;

    count = 0;
    inputNum = 0;
    startClock = clock();
    do {
        for ( i = minIterations; i; --i ) {
            function( inputs_int64[ inputNum ] );
            inputNum = ( inputNum + 1 ) & ( numInputs_int64 - 1 );
        }
        count += minIterations;
    } while ( clock() - startClock < CLOCKS_PER_SEC );
    inputNum = 0;
    startClock = clock();
    for ( i = count; i; --i ) {
        function( inputs_int64[ inputNum ] );
        inputNum = ( inputNum + 1 ) & ( numInputs_int64 - 1 );
    }
    endClock = clock();
    reportTime( count, endClock - startClock );

}

#endif

enum {
    numInputs_float32 = 32
};

static const float32 inputs_float32[ numInputs_float32 ] = {
    0x4EFA0000, 0xC1D0B328, 0x80000000, 0x3E69A31E,
    0xAF803EFF, 0x3F800000, 0x17BF8000, 0xE74A301A,
    0x4E010003, 0x7EE3C75D, 0xBD803FE0, 0xBFFEFF00,
    0x7981F800, 0x431FFFFC, 0xC100C000, 0x3D87EFFF,
    0x4103FEFE, 0xBC000007, 0xBF01F7FF, 0x4E6C6B5C,
    0xC187FFFE, 0xC58B9F13, 0x4F88007F, 0xDF004007,
    0xB7FFD7FE, 0x7E8001FB, 0x46EFFBFF, 0x31C10000,
    0xDB428661, 0x33F89B1F, 0xA3BFEFFF, 0x537BFFBE
};

static void time_a_float32_z_int32( int32 function( float32 ) )
{
    clock_t startClock, endClock;
    int32 count, i;
    int8 inputNum;

    count = 0;
    inputNum = 0;
    startClock = clock();
    do {
        for ( i = minIterations; i; --i ) {
            function( inputs_float32[ inputNum ] );
            inputNum = ( inputNum + 1 ) & ( numInputs_float32 - 1 );
        }
        count += minIterations;
    } while ( clock() - startClock < CLOCKS_PER_SEC );
    inputNum = 0;
    startClock = clock();
    for ( i = count; i; --i ) {
        function( inputs_float32[ inputNum ] );
        inputNum = ( inputNum + 1 ) & ( numInputs_float32 - 1 );
    }
    endClock = clock();
    reportTime( count, endClock - startClock );

}

static void time_a_float32_z_int64( int64 function( float32 ) )
{
    clock_t startClock, endClock;
    int32 count, i;
    int8 inputNum;

    count = 0;
    inputNum = 0;
    startClock = clock();
    do {
        for ( i = minIterations; i; --i ) {
            function( inputs_float32[ inputNum ] );
            inputNum = ( inputNum + 1 ) & ( numInputs_float32 - 1 );
        }