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/*
===========================================================================
Copyright (C) 2011 Thilo Schulz <thilo@tjps.eu>
This file is part of Quake III Arena source code.
Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include "qasm-inline.h"
static const unsigned short fpucw = 0x0C7F;
/*
* GNU inline asm ftol conversion functions using SSE or FPU
*/
long qftolsse(float f)
{
long retval;
__asm__ volatile
(
"cvttss2si %1, %0\n"
: "=r" (retval)
: "x" (f)
);
return retval;
}
int qvmftolsse(void)
{
int retval;
__asm__ volatile
(
"movss (" EDI ", " EBX ", 4), %%xmm0\n"
"cvttss2si %%xmm0, %0\n"
: "=r" (retval)
:
: "%xmm0"
);
return retval;
}
long qftolx87(float f)
{
long retval;
unsigned short oldcw = 0;
__asm__ volatile
(
"fnstcw %2\n"
"fldcw %3\n"
"flds %1\n"
"fistpl %1\n"
"fldcw %2\n"
"mov %1, %0\n"
: "=r" (retval)
: "m" (f), "m" (oldcw), "m" (fpucw)
);
return retval;
}
int qvmftolx87(void)
{
int retval;
unsigned short oldcw = 0;
__asm__ volatile
(
"fnstcw %1\n"
"fldcw %2\n"
"flds (" EDI ", " EBX ", 4)\n"
"fistpl (" EDI ", " EBX ", 4)\n"
"fldcw %1\n"
"mov (" EDI ", " EBX ", 4), %0\n"
: "=r" (retval)
: "m" (oldcw), "m" (fpucw)
);
return retval;
}
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