/*      $NetBSD: t_convert_xmm_s87.c,v 1.1 2020/10/15 17:44:44 mgorny Exp $     */

/*-
* Copyright (c) 2020 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Michał Górny for Moritz Systems Technology Company Sp. z o.o.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 <sys/cdefs.h>
__RCSID("$NetBSD: t_convert_xmm_s87.c,v 1.1 2020/10/15 17:44:44 mgorny Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <x86/cpu.h>
#include <x86/cpu_extended_state.h>

#include <stdint.h>
#include <string.h>

#include <atf-c.h>

#include "arch/x86/x86/convert_xmm_s87.c"

static const struct fpaccfx ST_INPUTS[] = {
       {{0x8000000000000000, 0x4000}}, /* +2.0 */
       {{0x3f00000000000000, 0x0000}}, /* 1.654785e-4932 */
       {{0x0000000000000000, 0x0000}}, /* +0 */
       {{0x0000000000000000, 0x8000}}, /* -0 */
       {{0x8000000000000000, 0x7fff}}, /* +inf */
       {{0x8000000000000000, 0xffff}}, /* -inf */
       {{0xc000000000000000, 0xffff}}, /* nan */
       {{0x8000000000000000, 0xc000}}, /* -2.0 */
};
__CTASSERT(sizeof(*ST_INPUTS) == 16);

ATF_TC(fsave_fxsave_hw);
ATF_TC_HEAD(fsave_fxsave_hw, tc)
{
       atf_tc_set_md_var(tc, "descr",
           "converting between FSAVE/FXSAVE comparing to actual results");
}

ATF_TC_BODY(fsave_fxsave_hw, tc)
{
       struct save87 fsave, fsave_conv;
       struct fxsave fxsave, fxsave_conv;
       int i, j;

       int mib[] = { CTL_MACHDEP, CPU_OSFXSR };
       int has_fxsave;
       size_t has_fxsave_size = sizeof(has_fxsave);
       if (sysctl(mib, __arraycount(mib), &has_fxsave, &has_fxsave_size,
           NULL, 0) == -1 || !has_fxsave)
               atf_tc_skip("FXSAVE not supported");

       for (i = 1; i <= __arraycount(ST_INPUTS); i++) {
               unsigned long unused1, unused2;
               __asm__ __volatile__(
                       "finit\n"
                       ".loadfp:\n\t"
                       "fldt (%2)\n\t"
                       "add $0x10, %2\n\t"
                       "loop .loadfp\n\t"
                       "fxsave %5\n\t"
                       "fsave %4\n\t"
                       : "=b"(unused1), "=c"(unused2)
                       : "b"(ST_INPUTS), "c"(i), "m"(fsave), "m"(fxsave)
                       : "st"
               );

               /* Self-assertion for working FSAVE/FXSAVE */
               ATF_REQUIRE_EQ(fsave.s87_cw, fxsave.fx_cw);
               ATF_REQUIRE_EQ(fsave.s87_sw, fxsave.fx_sw);

               /* Test process_xmm_to_s87() */
               process_xmm_to_s87(&fxsave, &fsave_conv);
               ATF_CHECK_EQ(fsave_conv.s87_cw, fsave.s87_cw);
               ATF_CHECK_EQ(fsave_conv.s87_sw, fsave.s87_sw);
               ATF_CHECK_EQ(fsave_conv.s87_tw, fsave.s87_tw);
               for (j = 0; j < i; j++) {
                       ATF_CHECK_EQ(fsave_conv.s87_ac[j].f87_exp_sign,
                           fsave.s87_ac[j].f87_exp_sign);
                       ATF_CHECK_EQ(fsave_conv.s87_ac[j].f87_mantissa,
                           fsave.s87_ac[j].f87_mantissa);
               }

               /* Test process_s87_to_xmm() */
               process_s87_to_xmm(&fsave, &fxsave_conv);
               ATF_CHECK_EQ(fxsave_conv.fx_cw, fxsave.fx_cw);
               ATF_CHECK_EQ(fxsave_conv.fx_sw, fxsave.fx_sw);
               ATF_CHECK_EQ(fxsave_conv.fx_tw, fxsave.fx_tw);
               for (j = 0; j < i; j++) {
                       ATF_CHECK_EQ(fxsave_conv.fx_87_ac[j].r.f87_exp_sign,
                           fxsave.fx_87_ac[j].r.f87_exp_sign);
                       ATF_CHECK_EQ(fxsave_conv.fx_87_ac[j].r.f87_mantissa,
                           fxsave.fx_87_ac[j].r.f87_mantissa);
               }
       }
}

struct s87_xmm_test_vector {
       uint16_t sw;
       uint16_t tw;
       uint8_t tw_abridged;
};

struct s87_xmm_test_vector FIXED_TEST_VECTORS[] = {
       {0x3800, 0x3fff, 0x80},
       {0x3000, 0x2fff, 0xc0},
       {0x2800, 0x27ff, 0xe0},
       {0x2000, 0x25ff, 0xf0},
       {0x1800, 0x25bf, 0xf8},
       {0x1000, 0x25af, 0xfc},
       {0x0800, 0x25ab, 0xfe},
       {0x0000, 0x25a8, 0xff},
};

ATF_TC(s87_to_xmm);
ATF_TC_HEAD(s87_to_xmm, tc)
{
       atf_tc_set_md_var(tc, "descr",
           "converting from FSAVE to FXSAVE using fixed test vectors");
}

ATF_TC_BODY(s87_to_xmm, tc)
{
       struct save87 fsave;
       struct fxsave fxsave;
       int i, j;

       memset(&fsave, 0, sizeof(fsave));
       for (i = 0; i < __arraycount(ST_INPUTS); i++) {
               fsave.s87_sw = FIXED_TEST_VECTORS[i].sw;
               fsave.s87_tw = FIXED_TEST_VECTORS[i].tw;
               for (j = 0; j <= i; j++)
                       fsave.s87_ac[i - j] = ST_INPUTS[j].r;

               process_s87_to_xmm(&fsave, &fxsave);
               ATF_CHECK_EQ(fxsave.fx_sw, FIXED_TEST_VECTORS[i].sw);
               ATF_CHECK_EQ(fxsave.fx_tw, FIXED_TEST_VECTORS[i].tw_abridged);
               for (j = 0; j < i; j++) {
                       ATF_CHECK_EQ(fxsave.fx_87_ac[i - j].r.f87_exp_sign,
                           ST_INPUTS[j].r.f87_exp_sign);
                       ATF_CHECK_EQ(fxsave.fx_87_ac[i - j].r.f87_mantissa,
                           ST_INPUTS[j].r.f87_mantissa);
               }
       }
}

ATF_TC(xmm_to_s87);
ATF_TC_HEAD(xmm_to_s87, tc)
{
       atf_tc_set_md_var(tc, "descr",
           "converting from FSAVE to FXSAVE using fixed test vectors");
}

ATF_TC_BODY(xmm_to_s87, tc)
{
       struct save87 fsave;
       struct fxsave fxsave;
       int i, j;

       memset(&fxsave, 0, sizeof(fxsave));
       for (i = 0; i < __arraycount(ST_INPUTS); i++) {
               fxsave.fx_sw = FIXED_TEST_VECTORS[i].sw;
               fxsave.fx_tw = FIXED_TEST_VECTORS[i].tw_abridged;
               for (j = 0; j <= i; j++)
                       fxsave.fx_87_ac[i - j] = ST_INPUTS[j];

               process_xmm_to_s87(&fxsave, &fsave);
               ATF_CHECK_EQ(fsave.s87_sw, FIXED_TEST_VECTORS[i].sw);
               ATF_CHECK_EQ(fsave.s87_tw, FIXED_TEST_VECTORS[i].tw);
               for (j = 0; j < i; j++) {
                       ATF_CHECK_EQ(fsave.s87_ac[i - j].f87_exp_sign,
                           ST_INPUTS[j].r.f87_exp_sign);
                       ATF_CHECK_EQ(fsave.s87_ac[i - j].f87_mantissa,
                           ST_INPUTS[j].r.f87_mantissa);
               }
       }
}

ATF_TP_ADD_TCS(tp)
{
       ATF_TP_ADD_TC(tp, fsave_fxsave_hw);
       ATF_TP_ADD_TC(tp, s87_to_xmm);
       ATF_TP_ADD_TC(tp, xmm_to_s87);
       return atf_no_error();
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.