xref: /src/regress/lib/libc/ieeefp/testfloat/testfloat.c

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

This C source file is part of TestFloat, Release 2a, a package of programs
for testing the correctness of floating-point arithmetic complying to the
IEC/IEEE Standard for Floating-Point.

Written by John R. Hauser.  More information is available through the Web
page `http://HTTP.CS.Berkeley.EDU/~jhauser/arithmetic/TestFloat.html'.

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 ANY
AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.

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

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

#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include "milieu.h"
#include "fail.h"
#include "softfloat.h"
#include "testCases.h"
#include "testLoops.h"
#include "systflags.h"
#include "testFunction.h"

static void catchSIGINT( int signalCode )
{

    if ( stop ) exit( EXIT_FAILURE );
    stop = TRUE;

}

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

    fail_programName = "testfloat";
    if ( argc <= 1 ) goto writeHelpMessage;
    testCases_setLevel( 1 );
    trueName = "soft";
    testName = "syst";
    errorStop = FALSE;
    forever = FALSE;
    maxErrorCount = 20;
    trueFlagsPtr = &float_exception_flags;
    testFlagsFunctionPtr = syst_float_flags_clear;
    tininessModeName = 0;
    functionArgument = FALSE;
    functionCode = 0;
    operands = 0;
    roundingPrecision = 0;
    roundingMode = 0;
    --argc;
    ++argv;
    while ( argc && ( argPtr = argv[ 0 ] ) ) {
        if ( argPtr[ 0 ] == '-' ) ++argPtr;
        if ( strcmp( argPtr, "help" ) == 0 ) {
 writeHelpMessage:
            fputs(
"testfloat [<option>...] <function>\n"
"  <option>:  (* is default)\n"
"    -help            --Write this message and exit.\n"
"    -list            --List all testable functions and exit.\n"
"    -level <num>     --Testing level <num> (1 or 2).\n"
" *  -level 1\n"
"    -errors <num>    --Stop each function test after <num> errors.\n"
" *  -errors 20\n"
"    -errorstop       --Exit after first function with any error.\n"
"    -forever         --Test one function repeatedly (implies `-level 2').\n"
"    -checkNaNs       --Check for bitwise correctness of NaN results.\n"
#ifdef FLOATX80
"    -precision32     --Only test rounding precision equivalent to float32.\n"
"    -precision64     --Only test rounding precision equivalent to float64.\n"
"    -precision80     --Only test maximum rounding precision.\n"
#endif
"    -nearesteven     --Only test rounding to nearest/even.\n"
"    -tozero          --Only test rounding to zero.\n"
"    -down            --Only test rounding down.\n"
"    -up              --Only test rounding up.\n"
"    -tininessbefore  --Underflow tininess detected before rounding.\n"
"    -tininessafter   --Underflow tininess detected 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"
#ifdef BITS64
"    int64_to_<float>                 <float>_div   <float>_eq_signaling\n"
"    <float>_to_int64                 <float>_rem   <float>_le_quiet\n"
"    <float>_to_int64_round_to_zero                 <float>_lt_quiet\n"
"    <float>_to_<float>\n"
"    <float>_round_to_int\n"
"    <float>_sqrt\n"
#else
"    <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"
#endif
"    -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"
#ifdef FLOATX80
"    floatx80         --Extended double precision.\n"
#endif
#ifdef FLOAT128
"    float128         --Quadruple precision.\n"
#endif
                ,
                stdout
            );
            return EXIT_SUCCESS;
        }
        else if ( strcmp( argPtr, "list" ) == 0 ) {
            for ( functionCode = 1;
                  functionCode < NUM_FUNCTIONS;
                  ++functionCode
                ) {
                if ( functionExists[ functionCode ] ) {
                    puts( functions[ functionCode ].name );
                }
            }
            return EXIT_SUCCESS;
        }
        else if ( strcmp( argPtr, "level" ) == 0 ) {
            if ( argc < 2 ) goto optionError;
            testCases_setLevel( atoi( argv[ 1 ] ) );
            --argc;
            ++argv;
        }
        else if ( strcmp( argPtr, "level1" ) == 0 ) {
            testCases_setLevel( 1 );
        }
        else if ( strcmp( argPtr, "level2" ) == 0 ) {
            testCases_setLevel( 2 );
        }
        else if ( strcmp( argPtr, "errors" ) == 0 ) {
            if ( argc < 2 ) {
     optionError:
                fail( "`%s' option requires numeric argument", argv[ 0 ] );
            }
            maxErrorCount = atoi( argv[ 1 ] );
            --argc;
            ++argv;
        }
        else if ( strcmp( argPtr, "errorstop" ) == 0 ) {
            errorStop = TRUE;
        }
        else if ( strcmp( argPtr, "forever" ) == 0 ) {
            testCases_setLevel( 2 );
            forever = TRUE;
        }
        else if (    ( strcmp( argPtr, "checkNaNs" ) == 0 )
                  || ( strcmp( argPtr, "checknans" ) == 0 ) ) {
            checkNaNs = TRUE;
        }
#ifdef FLOATX80
        else if ( strcmp( argPtr, "precision32" ) == 0 ) {
            roundingPrecision = 32;
        }
        else if ( strcmp( argPtr, "precision64" ) == 0 ) {
            roundingPrecision = 64;
        }
        else if ( strcmp( argPtr, "precision80" ) == 0 ) {
            roundingPrecision = 80;
        }
#endif
        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 ) {
            float_detect_tininess = float_tininess_before_rounding;
        }
        else if ( strcmp( argPtr, "tininessafter" ) == 0 ) {
            float_detect_tininess = float_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 ] );
            }
            if ( ! functionExists[ functionCode ] ) {
                fail(
                    "Function `%s' is not supported or cannot be tested",
                    argPtr
                );
            }
            functionArgument = TRUE;
        }
        --argc;
        ++argv;
    }
    if ( ! functionArgument ) fail( "Function argument required" );
    (void) signal( SIGINT, catchSIGINT );
    (void) signal( SIGTERM, catchSIGINT );
    if ( functionCode ) {
        if ( forever ) {
            if ( ! roundingPrecision ) roundingPrecision = 80;
            if ( ! roundingMode ) roundingMode = ROUND_NEAREST_EVEN;
        }
        testFunction( functionCode, roundingPrecision, roundingMode );
    }
    else {
        if ( forever ) {
            fail( "Can only test one function with `-forever' option" );
        }
        if ( operands == 1 ) {
            for ( functionCode = 1;
                  functionCode < NUM_FUNCTIONS;
                  ++functionCode
                ) {
                if (    functionExists[ functionCode ]
                     && ( functions[ functionCode ].numInputs == 1 ) ) {
                    testFunction(
                        functionCode, roundingPrecision, roundingMode );
                }
            }
        }
        else if ( operands == 2 ) {
            for ( functionCode = 1;
                  functionCode < NUM_FUNCTIONS;
                  ++functionCode
                ) {
                if (    functionExists[ functionCode ]
                     && ( functions[ functionCode ].numInputs == 2 ) ) {
                    testFunction(
                        functionCode, roundingPrecision, roundingMode );
                }
            }
        }
        else {
            for ( functionCode = 1;
                  functionCode < NUM_FUNCTIONS;
                  ++functionCode
                ) {
                if ( functionExists[ functionCode ] ) {
                    testFunction(
                        functionCode, roundingPrecision, roundingMode );
                }
            }
        }
    }
    exitWithStatus();

}