timesoftfloat.c

来自「基于4个mips核的noc设计」· C语言 代码 · 共 1,051 行 · 第 1/3 页

    { "float32_eq_signaling",            2, FALSE, FALSE },
    { "float32_le_quiet",                2, FALSE, FALSE },
    { "float32_lt_quiet",                2, FALSE, FALSE },
    { "float64_to_int32",                1, TRUE,  FALSE },
    { "float64_to_int32_round_to_zero",  1, FALSE, FALSE },
    { "float64_to_float32",              1, TRUE,  TRUE, },
    { "float64_round_to_int",            1, TRUE,  FALSE },
    { "float64_add",                     2, TRUE,  FALSE },
    { "float64_sub",                     2, TRUE,  FALSE },
    { "float64_mul",                     2, TRUE,  TRUE, },
    { "float64_div",                     2, TRUE,  FALSE },
    { "float64_rem",                     2, FALSE, FALSE },
    { "float64_sqrt",                    1, TRUE,  FALSE },
    { "float64_eq",                      2, FALSE, FALSE },
    { "float64_le",                      2, FALSE, FALSE },
    { "float64_lt",                      2, FALSE, FALSE },
    { "float64_eq_signaling",            2, FALSE, FALSE },
    { "float64_le_quiet",                2, FALSE, FALSE },
    { "float64_lt_quiet",                2, FALSE, FALSE }
};

enum {
    ROUND_NEAREST_EVEN = 1,
    ROUND_TO_ZERO,
    ROUND_DOWN,
    ROUND_UP,
    NUM_ROUNDINGMODES
};
enum {
    TININESS_BEFORE_ROUNDING = 1,
    TININESS_AFTER_ROUNDING,
    NUM_TININESSMODES
};

static void
 timeFunctionVariety(
     uint8 functionCode, int8 roundingMode, int8 tininessMode )
{
    uint8 roundingCode;
    int8 tininessCode;

    functionName = functions[ functionCode ].name;
    switch ( roundingMode ) {
     case 0:
        roundingModeName = 0;
        roundingCode = float_round_nearest_even;
        break;
     case ROUND_NEAREST_EVEN:
        roundingModeName = "nearest_even";
        roundingCode = float_round_nearest_even;
        break;
     case ROUND_TO_ZERO:
        roundingModeName = "to_zero";
        roundingCode = float_round_to_zero;
        break;
     case ROUND_DOWN:
        roundingModeName = "down";
        roundingCode = float_round_down;
        break;
     case ROUND_UP:
        roundingModeName = "up";
        roundingCode = float_round_up;
        break;
    }
    float_rounding_mode = roundingCode;
    switch ( tininessMode ) {
     case 0:
        tininessModeName = 0;
        tininessCode = float_tininess_after_rounding;
        break;
     case TININESS_BEFORE_ROUNDING:
        tininessModeName = "before";
        tininessCode = float_tininess_before_rounding;
        break;
     case TININESS_AFTER_ROUNDING:
        tininessModeName = "after";
        tininessCode = float_tininess_after_rounding;
        break;
    }
    float_detect_tininess = tininessCode;
    switch ( functionCode ) {
     case INT32_TO_FLOAT32:
        time_a_int32_z_float32( int32_to_float32 );
        break;
     case INT32_TO_FLOAT64:
        time_a_int32_z_float64( int32_to_float64 );
        break;
     case FLOAT32_TO_INT32:
        time_a_float32_z_int32( float32_to_int32 );
        break;
     case FLOAT32_TO_INT32_ROUND_TO_ZERO:
        time_a_float32_z_int32( float32_to_int32_round_to_zero );
        break;
     case FLOAT32_TO_FLOAT64:
        time_a_float32_z_float64( float32_to_float64 );
        break;
     case FLOAT32_ROUND_TO_INT:
        time_az_float32( float32_round_to_int );
        break;
     case FLOAT32_ADD:
        time_abz_float32( float32_add );
        break;
     case FLOAT32_SUB:
        time_abz_float32( float32_sub );
        break;
     case FLOAT32_MUL:
        time_abz_float32( float32_mul );
        break;
     case FLOAT32_DIV:
        time_abz_float32( float32_div );
        break;
     case FLOAT32_REM:
        time_abz_float32( float32_rem );
        break;
     case FLOAT32_SQRT:
        time_az_float32_pos( float32_sqrt );
        break;
     case FLOAT32_EQ:
        time_ab_float32_z_flag( float32_eq );
        break;
     case FLOAT32_LE:
        time_ab_float32_z_flag( float32_le );
        break;
     case FLOAT32_LT:
        time_ab_float32_z_flag( float32_lt );
        break;
     case FLOAT32_EQ_SIGNALING:
        time_ab_float32_z_flag( float32_eq_signaling );
        break;
     case FLOAT32_LE_QUIET:
        time_ab_float32_z_flag( float32_le_quiet );
        break;
     case FLOAT32_LT_QUIET:
        time_ab_float32_z_flag( float32_lt_quiet );
        break;
     case FLOAT64_TO_INT32:
        time_a_float64_z_int32( float64_to_int32 );
        break;
     case FLOAT64_TO_INT32_ROUND_TO_ZERO:
        time_a_float64_z_int32( float64_to_int32_round_to_zero );
        break;
     case FLOAT64_TO_FLOAT32:
        time_a_float64_z_float32( float64_to_float32 );
        break;
     case FLOAT64_ROUND_TO_INT:
        time_az_float64( float64_round_to_int );
        break;
     case FLOAT64_ADD:
        time_abz_float64( float64_add );
        break;
     case FLOAT64_SUB:
        time_abz_float64( float64_sub );
        break;
     case FLOAT64_MUL:
        time_abz_float64( float64_mul );
        break;
     case FLOAT64_DIV:
        time_abz_float64( float64_div );
        break;
     case FLOAT64_REM:
        time_abz_float64( float64_rem );
        break;
     case FLOAT64_SQRT:
        time_az_float64_pos( float64_sqrt );
        break;
     case FLOAT64_EQ:
        time_ab_float64_z_flag( float64_eq );
        break;
     case FLOAT64_LE:
        time_ab_float64_z_flag( float64_le );
        break;
     case FLOAT64_LT:
        time_ab_float64_z_flag( float64_lt );
        break;
     case FLOAT64_EQ_SIGNALING:
        time_ab_float64_z_flag( float64_eq_signaling );
        break;
     case FLOAT64_LE_QUIET:
        time_ab_float64_z_flag( float64_le_quiet );
        break;
     case FLOAT64_LT_QUIET:
        time_ab_float64_z_flag( float64_lt_quiet );
        break;
    }

}

static void
 timeFunction( uint8 functionCode, int8 roundingModeIn, int8 tininessModeIn )
{
    int8 roundingMode, tininessMode;

    for ( roundingMode = 1;
          roundingMode < NUM_ROUNDINGMODES;
          ++roundingMode
        ) {
        if ( ! functions[ functionCode ].roundingMode ) {
            roundingMode = 0;
        }
        else if ( roundingModeIn ) {
            roundingMode = roundingModeIn;
        }
        for ( tininessMode = 1;
              tininessMode < NUM_TININESSMODES;
              ++tininessMode
            ) {
            if ( ! functions[ functionCode ].tininessMode ) {
                tininessMode = 0;
            }
            else if ( tininessModeIn ) {
                tininessMode = tininessModeIn;
            }
            timeFunctionVariety( functionCode, roundingMode, tininessMode );
            if ( tininessModeIn || ! tininessMode ) break;
        }
        if ( roundingModeIn || ! roundingMode ) break;
    }

}

main( int argc, char **argv )
{
    char *argPtr;
    flag functionArgument;
    uint8 functionCode;
    int8 operands, roundingMode, tininessMode;

    if ( argc <= 1 ) goto writeHelpMessage;
    functionArgument = FALSE;
    functionCode = 0;
    operands = 0;
    roundingMode = 0;
    tininessMode = 0;
    --argc;
    ++argv;
    while ( argc && ( argPtr = argv[ 0 ] ) ) {
        if ( argPtr[ 0 ] == '-' ) ++argPtr;
        if ( strcmp( argPtr, "help" ) == 0 ) {
 writeHelpMessage:
            fputs(
"timesoftfloat [<option>...] <function>\n"
"  <option>:  (* is default)\n"
"    -help            --Write this message and exit.\n"
"    -nearesteven     --Only time rounding to nearest/even.\n"
"    -tozero          --Only time rounding to zero.\n"
"    -down            --Only time rounding down.\n"
"    -up              --Only time rounding up.\n"
"    -tininessbefore  --Only time underflow tininess before rounding.\n"
"    -tininessafter   --Only time underflow tininess after rounding.\n"
"  <function>:\n"
"    int32_to_<float>                 <float>_add   <float>_eq\n"
"    <float>_to_int32                 <float>_sub   <float>_le\n"
"    <float>_to_int32_round_to_zero   <float>_mul   <float>_lt\n"
"    <float>_to_<float>               <float>_div   <float>_eq_signaling\n"
"    <float>_round_to_int             <float>_rem   <float>_le_quiet\n"
"    <float>_sqrt                                   <float>_lt_quiet\n"
"    -all1            --All 1-operand functions.\n"
"    -all2            --All 2-operand functions.\n"
"    -all             --All functions.\n"
"  <float>:\n"
"    float32          --Single precision.\n"
"    float64          --Double precision.\n",
                stdout
            );
            return EXIT_SUCCESS;
        }
        else if (    ( strcmp( argPtr, "nearesteven" ) == 0 )
                  || ( strcmp( argPtr, "nearest_even" ) == 0 ) ) {
            roundingMode = ROUND_NEAREST_EVEN;
        }
        else if (    ( strcmp( argPtr, "tozero" ) == 0 )
                  || ( strcmp( argPtr, "to_zero" ) == 0 ) ) {
            roundingMode = ROUND_TO_ZERO;
        }
        else if ( strcmp( argPtr, "down" ) == 0 ) {
            roundingMode = ROUND_DOWN;
        }
        else if ( strcmp( argPtr, "up" ) == 0 ) {
            roundingMode = ROUND_UP;
        }
        else if ( strcmp( argPtr, "tininessbefore" ) == 0 ) {
            tininessMode = TININESS_BEFORE_ROUNDING;
        }
        else if ( strcmp( argPtr, "tininessafter" ) == 0 ) {
            tininessMode = TININESS_AFTER_ROUNDING;
        }
        else if ( strcmp( argPtr, "all1" ) == 0 ) {
            functionArgument = TRUE;
            functionCode = 0;
            operands = 1;
        }
        else if ( strcmp( argPtr, "all2" ) == 0 ) {
            functionArgument = TRUE;
            functionCode = 0;
            operands = 2;
        }
        else if ( strcmp( argPtr, "all" ) == 0 ) {
            functionArgument = TRUE;
            functionCode = 0;
            operands = 0;
        }
        else {
            for ( functionCode = 1;
                  functionCode < NUM_FUNCTIONS;
                  ++functionCode 
                ) {
                if ( strcmp( argPtr, functions[ functionCode ].name ) == 0 ) {
                    break;
                }
            }
            if ( functionCode == NUM_FUNCTIONS ) {
                fail( "Invalid option or function `%s'", argv[ 0 ] );
            }
            functionArgument = TRUE;
        }
        --argc;
        ++argv;
    }
    if ( ! functionArgument ) fail( "Function argument required" );
    if ( functionCode ) {
        timeFunction( functionCode, roundingMode, tininessMode );
    }
    else if ( operands == 1 ) {
        for ( functionCode = 1; functionCode < NUM_FUNCTIONS; ++functionCode
            ) {
            if ( functions[ functionCode ].numInputs == 1 ) {
                timeFunction( functionCode, roundingMode, tininessMode );
            }
        }
    }
    else if ( operands == 2 ) {
        for ( functionCode = 1; functionCode < NUM_FUNCTIONS; ++functionCode
            ) {
            if ( functions[ functionCode ].numInputs == 2 ) {
                timeFunction( functionCode, roundingMode, tininessMode );
            }
        }
    }
    else {
        for ( functionCode = 1; functionCode < NUM_FUNCTIONS; ++functionCode
            ) {
            timeFunction( functionCode, roundingMode, tininessMode );
        }
    }
    return EXIT_SUCCESS;

}