source: mainline/uspace/app/tester/float/softfloat1.c@ a35b458

/*
 * Copyright (c) 2012 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stddef.h>
#include <inttypes.h>
#include <mathtypes.h>
#include <add.h>
#include <sub.h>
#include <mul.h>
#include <div.h>
#include <comparison.h>
#include <conversion.h>
#include "../tester.h"

#define add_float  __addsf3
#define sub_float  __subsf3
#define mul_float  __mulsf3
#define div_float  __divsf3

#define is_float_lt  __ltsf2
#define is_float_gt  __gtsf2
#define is_float_eq  __eqsf2

#define add_double  __adddf3
#define sub_double  __subdf3
#define mul_double  __muldf3
#define div_double  __divdf3

#define is_double_lt  __ltdf2
#define is_double_gt  __gtdf2
#define is_double_eq  __eqdf2

#define uint_to_double  __floatsidf
#define double_to_uint  __fixunsdfsi
#define double_to_int   __fixdfsi

#define OPERANDS   10
#define PRECISION  1000

#define PRIdCMPTYPE  PRId32

typedef int32_t cmptype_t;

typedef void (* uint_to_double_op_t)(unsigned int, double *, double *);
typedef void (* double_to_uint_op_t)(double, unsigned int *, unsigned int *);
typedef void (* float_binary_op_t)(float, float, float *, float *);
typedef void (* float_cmp_op_t)(float, float, cmptype_t *, cmptype_t *);
typedef void (* double_binary_op_t)(double, double, double *, double *);
typedef void (* double_cmp_op_t)(double, double, cmptype_t *, cmptype_t *);

typedef void (* template_unary_t)(void *, unsigned, cmptype_t *, cmptype_t *);
typedef void (* template_binary_t)(void *, unsigned, unsigned, cmptype_t *,
    cmptype_t *);

#define NUMBERS \
        3.5, -2.1, 100.0, 50.0, -1024.0, 0.0, 768.3156, 1080.499999, -600.0, 1.0

static float fop_a[OPERANDS] = {
        NUMBERS
};

static double dop_a[OPERANDS] = {
        NUMBERS
};

static unsigned int uop_a[OPERANDS] = {
        4, 2, 100, 50, 1024, 0, 1000000, 1, 0x8000000, 500
};

static int fcmp(float a, float b)
{
        if (a < b)
                return -1;

        if (a > b)
                return 1;

        return 0;
}

static int dcmp(double a, double b)
{
        if (a < b)
                return -1;

        if (a > b)
                return 1;

        return 0;
}

static void uint_to_double_template(void *f, unsigned i, cmptype_t *pic,
    cmptype_t *pisc)
{
        uint_to_double_op_t op = (uint_to_double_op_t) f;

        double c;
        double sc;
        op(uop_a[i], &c, &sc);

        *pic = (cmptype_t) (c * PRECISION);
        *pisc = (cmptype_t) (sc * PRECISION);
}

static void double_to_uint_template(void *f, unsigned i, cmptype_t *pic,
    cmptype_t *pisc)
{
        double_to_uint_op_t op = (double_to_uint_op_t) f;

        unsigned int c;
        unsigned int sc;
        op(dop_a[i], &c, &sc);

        *pic = (cmptype_t) c;
        *pisc = (cmptype_t) sc;
}

static void float_template_binary(void *f, unsigned i, unsigned j,
    cmptype_t *pic, cmptype_t *pisc)
{
        float_binary_op_t op = (float_binary_op_t) f;

        float c;
        float sc;
        op(fop_a[i], fop_a[j], &c, &sc);

        *pic = (cmptype_t) (c * PRECISION);
        *pisc = (cmptype_t) (sc * PRECISION);
}

static void float_compare_template(void *f, unsigned i, unsigned j,
    cmptype_t *pis, cmptype_t *piss)
{
        float_cmp_op_t op = (float_cmp_op_t) f;

        op(dop_a[i], dop_a[j], pis, piss);
}

static void double_template_binary(void *f, unsigned i, unsigned j,
    cmptype_t *pic, cmptype_t *pisc)
{
        double_binary_op_t op = (double_binary_op_t) f;

        double c;
        double sc;
        op(dop_a[i], dop_a[j], &c, &sc);

        *pic = (cmptype_t) (c * PRECISION);
        *pisc = (cmptype_t) (sc * PRECISION);
}

static void double_compare_template(void *f, unsigned i, unsigned j,
    cmptype_t *pis, cmptype_t *piss)
{
        double_cmp_op_t op = (double_cmp_op_t) f;

        op(dop_a[i], dop_a[j], pis, piss);
}

static bool test_template_unary(template_unary_t template, void *f)
{
        bool correct = true;

        for (unsigned int i = 0; i < OPERANDS; i++) {
                cmptype_t ic;
                cmptype_t isc;

                template(f, i, &ic, &isc);
                cmptype_t diff = ic - isc;

                if (diff != 0) {
                        TPRINTF("i=%u ic=%" PRIdCMPTYPE " isc=%" PRIdCMPTYPE "\n",
                            i, ic, isc);
                        correct = false;
                }
        }

        return correct;
}

static bool test_template_binary(template_binary_t template, void *f)
{
        bool correct = true;

        for (unsigned int i = 0; i < OPERANDS; i++) {
                for (unsigned int j = 0; j < OPERANDS; j++) {
                        cmptype_t ic;
                        cmptype_t isc;

                        template(f, i, j, &ic, &isc);
                        cmptype_t diff = ic - isc;

                        if (diff != 0) {
                                TPRINTF("i=%u, j=%u ic=%" PRIdCMPTYPE
                                    " isc=%" PRIdCMPTYPE "\n", i, j, ic, isc);
                                correct = false;
                        }
                }
        }

        return correct;
}

static void uint_to_double_operator(unsigned int a, double *pc, double *psc)
{
        *pc = (double) a;
        *psc = uint_to_double(a);
}

static void double_to_uint_operator(double a, unsigned int *pc,
    unsigned int *psc)
{
        *pc = (unsigned int) a;
        *psc = double_to_uint(a);
}

static void double_to_int_operator(double a, unsigned int *pc,
    unsigned int *psc)
{
        *pc = (int) a;
        *psc = double_to_int(a);
}

static void float_add_operator(float a, float b, float *pc, float *psc)
{
        *pc = a + b;
        *psc = add_float(a, b);
}

static void float_sub_operator(float a, float b, float *pc, float *psc)
{
        *pc = a - b;
        *psc = sub_float(a, b);
}

static void float_mul_operator(float a, float b, float *pc, float *psc)
{
        *pc = a * b;
        *psc = mul_float(a, b);
}

static void float_div_operator(float a, float b, float *pc, float *psc)
{
        if ((cmptype_t) b == 0) {
                *pc = 0.0;
                *psc = 0.0;
                return;
        }

        *pc = a / b;
        *psc = div_float(a, b);
}

static void float_cmp_operator(float a, float b, cmptype_t *pis,
    cmptype_t *piss)
{
        *pis = fcmp(a, b);

        if (is_float_lt(a, b) == -1)
                *piss = -1;
        else if (is_float_gt(a, b) == 1)
                *piss = 1;
        else if (is_float_eq(a, b) == 0)
                *piss = 0;
        else
                *piss = 42;
}

static void double_add_operator(double a, double b, double *pc, double *psc)
{
        *pc = a + b;
        *psc = add_double(a, b);
}

static void double_sub_operator(double a, double b, double *pc, double *psc)
{
        *pc = a - b;
        *psc = sub_double(a, b);
}

static void double_mul_operator(double a, double b, double *pc, double *psc)
{
        *pc = a * b;
        *psc = mul_double(a, b);
}

static void double_div_operator(double a, double b, double *pc, double *psc)
{
        if ((cmptype_t) b == 0) {
                *pc = 0.0;
                *psc = 0.0;
                return;
        }

        *pc = a / b;
        *psc = div_double(a, b);
}

static void double_cmp_operator(double a, double b, cmptype_t *pis,
    cmptype_t *piss)
{
        *pis = dcmp(a, b);

        if (is_double_lt(a, b) == -1)
                *piss = -1;
        else if (is_double_gt(a, b) == 1)
                *piss = 1;
        else if (is_double_eq(a, b) == 0)
                *piss = 0;
        else
                *piss = 42;
}

const char *test_softfloat1(void)
{
        bool err = false;

        if (!test_template_binary(float_template_binary, float_add_operator)) {
                err = true;
                TPRINTF("%s\n", "Float addition failed");
        }

        if (!test_template_binary(float_template_binary, float_sub_operator)) {
                err = true;
                TPRINTF("%s\n", "Float addition failed");
        }

        if (!test_template_binary(float_template_binary, float_mul_operator)) {
                err = true;
                TPRINTF("%s\n", "Float multiplication failed");
        }

        if (!test_template_binary(float_template_binary, float_div_operator)) {
                err = true;
                TPRINTF("%s\n", "Float division failed");
        }

        if (!test_template_binary(float_compare_template, float_cmp_operator)) {
                err = true;
                TPRINTF("%s\n", "Float comparison failed");
        }

        if (!test_template_binary(double_template_binary, double_add_operator)) {
                err = true;
                TPRINTF("%s\n", "Double addition failed");
        }

        if (!test_template_binary(double_template_binary, double_sub_operator)) {
                err = true;
                TPRINTF("%s\n", "Double addition failed");
        }

        if (!test_template_binary(double_template_binary, double_mul_operator)) {
                err = true;
                TPRINTF("%s\n", "Double multiplication failed");
        }

        if (!test_template_binary(double_template_binary, double_div_operator)) {
                err = true;
                TPRINTF("%s\n", "Double division failed");
        }

        if (!test_template_binary(double_compare_template, double_cmp_operator)) {
                err = true;
                TPRINTF("%s\n", "Double comparison failed");
        }

        if (!test_template_unary(uint_to_double_template,
            uint_to_double_operator)) {
                err = true;
                TPRINTF("%s\n", "Conversion from unsigned int to double failed");
        }

        if (!test_template_unary(double_to_uint_template,
            double_to_uint_operator)) {
                err = true;
                TPRINTF("%s\n", "Conversion from double to unsigned int failed");
        }

        if (!test_template_unary(double_to_uint_template,
            double_to_int_operator)) {
                err = true;
                TPRINTF("%s\n", "Conversion from double to signed int failed");
        }

        if (err)
                return "Software floating point imprecision";

        return NULL;
}