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/* |
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* Copyright (C) 2013-2019 Cisco Systems, Inc. and/or its affiliates. All rights reserved. |
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* Copyright (C) 2013 Sourcefire, Inc.
*
* Authors: Steven Morgan <smorgan@sourcefire.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include "others.h"
#include "fpu.h"
/* the character representation of the double below is "elleemme" or "emmeelle" upon depending
whether floating point little endian or big endian(IEEE-754) is in effect. */
int get_fpu_endian(void)
{ |
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#ifdef _WIN32
return FPU_ENDIAN_LITTLE;
#else |
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const char * fpu_le = "elleemme";
const char * fpu_be = "emmeelle";
const union sd { |
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double d;
char mem[8];
} u_md = {3815911171354501045744583353695226502220105394563506259449467213186125718792664588210662403287568710818873279842508553551908601408568128557088985172985437412593385138085986771664896.0};
if (!memcmp(u_md.mem, fpu_le, 8)) {
cli_dbgmsg("fpu: Floating point little endian detected.\n");
return FPU_ENDIAN_LITTLE; |
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} else if (!memcmp(u_md.mem, fpu_be, 8)) { |
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cli_dbgmsg("fpu: Floating point big endian detected.\n");
return FPU_ENDIAN_BIG;
} else { |
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cli_dbgmsg("fpu: Floating point endian detection failed. " |
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"Bytes: %.2x %.2x %.2x %.2x %.2x %.2x %.2x %.2x \n",
u_md.mem[0], u_md.mem[1], u_md.mem[2], u_md.mem[3],
u_md.mem[4], u_md.mem[5], u_md.mem[6], u_md.mem[7]);
}
return FPU_ENDIAN_UNKNOWN; |
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#endif |
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} |