mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-10 03:54:48 +00:00
208 lines
3.8 KiB
C
208 lines
3.8 KiB
C
/* Automatic switching between software and hardware IEEE 128-bit
|
|
floating-point emulation for PowerPC.
|
|
|
|
Copyright (C) 2016 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Michael Meissner (meissner@linux.vnet.ibm.com)
|
|
Code is based on the main soft-fp library written by:
|
|
Richard Henderson (rth@cygnus.com) and
|
|
Jakub Jelinek (jj@ultra.linux.cz).
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
In addition to the permissions in the GNU Lesser General Public
|
|
License, the Free Software Foundation gives you unlimited
|
|
permission to link the compiled version of this file into
|
|
combinations with other programs, and to distribute those
|
|
combinations without any restriction coming from the use of this
|
|
file. (The Lesser General Public License restrictions do apply in
|
|
other respects; for example, they cover modification of the file,
|
|
and distribution when not linked into a combine executable.)
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <soft-fp.h>
|
|
#include <quad-float128.h>
|
|
|
|
#ifndef __FLOAT128_HARDWARE__
|
|
#error "This module must be compiled with IEEE 128-bit hardware support"
|
|
#endif
|
|
|
|
TFtype
|
|
__addkf3_hw (TFtype a, TFtype b)
|
|
{
|
|
return a + b;
|
|
}
|
|
|
|
TFtype
|
|
__subkf3_hw (TFtype a, TFtype b)
|
|
{
|
|
return a - b;
|
|
}
|
|
|
|
TFtype
|
|
__mulkf3_hw (TFtype a, TFtype b)
|
|
{
|
|
return a * b;
|
|
}
|
|
|
|
TFtype
|
|
__divkf3_hw (TFtype a, TFtype b)
|
|
{
|
|
return a / b;
|
|
}
|
|
|
|
TFtype
|
|
__negkf2_hw (TFtype a)
|
|
{
|
|
return -a;
|
|
}
|
|
|
|
TFtype
|
|
__floatsikf_hw (SItype_ppc a)
|
|
{
|
|
return (TFtype) a;
|
|
}
|
|
|
|
TFtype
|
|
__floatunsikf_hw (USItype_ppc a)
|
|
{
|
|
return (TFtype) a;
|
|
}
|
|
|
|
TFtype
|
|
__floatdikf_hw (DItype_ppc a)
|
|
{
|
|
return (TFtype) a;
|
|
}
|
|
|
|
TFtype
|
|
__floatundikf_hw (UDItype_ppc a)
|
|
{
|
|
return (TFtype) a;
|
|
}
|
|
|
|
SItype_ppc
|
|
__fixkfsi_hw (TFtype a)
|
|
{
|
|
return (SItype_ppc) a;
|
|
}
|
|
|
|
USItype_ppc
|
|
__fixunskfsi_hw (TFtype a)
|
|
{
|
|
return (USItype_ppc) a;
|
|
}
|
|
|
|
DItype_ppc
|
|
__fixkfdi_hw (TFtype a)
|
|
{
|
|
return (DItype_ppc) a;
|
|
}
|
|
|
|
UDItype_ppc
|
|
__fixunskfdi_hw (TFtype a)
|
|
{
|
|
return (UDItype_ppc) a;
|
|
}
|
|
|
|
TFtype
|
|
__extendsfkf2_hw (float a)
|
|
{
|
|
return (TFtype) a;
|
|
}
|
|
|
|
TFtype
|
|
__extenddfkf2_hw (double a)
|
|
{
|
|
return (TFtype) a;
|
|
}
|
|
|
|
float
|
|
__trunckfsf2_hw (TFtype a)
|
|
{
|
|
return (float) a;
|
|
}
|
|
|
|
double
|
|
__trunckfdf2_hw (TFtype a)
|
|
{
|
|
return (double) a;
|
|
}
|
|
|
|
/* __eqkf2 returns 0 if equal, or 1 if not equal or NaN. */
|
|
CMPtype
|
|
__eqkf2_hw (TFtype a, TFtype b)
|
|
{
|
|
return (a != b);
|
|
}
|
|
|
|
/* __gekf2 returns -1 if a < b, 0 if a == b, +1 if a > b, or -2 if NaN. */
|
|
CMPtype
|
|
__gekf2_hw (TFtype a, TFtype b)
|
|
{
|
|
if (a < b)
|
|
return -1;
|
|
|
|
else if (__builtin_isunordered (a, b))
|
|
return -2;
|
|
|
|
else if (a == b)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* __lekf2 returns -1 if a < b, 0 if a == b, +1 if a > b, or +2 if NaN. */
|
|
CMPtype
|
|
__lekf2_hw (TFtype a, TFtype b)
|
|
{
|
|
if (a < b)
|
|
return -1;
|
|
|
|
else if (__builtin_isunordered (a, b))
|
|
return 2;
|
|
|
|
else if (a == b)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* __unordkf2 returns 1 if NaN or 0 otherwise. */
|
|
CMPtype
|
|
__unordkf2_hw (TFtype a, TFtype b)
|
|
{
|
|
return (__builtin_isunordered (a, b)) ? 1 : 0;
|
|
}
|
|
|
|
/* Convert __float128 to __ibm128. */
|
|
IBM128_TYPE
|
|
__extendkftf2_hw (TFtype value)
|
|
{
|
|
IBM128_TYPE ret;
|
|
|
|
CVT_FLOAT128_TO_IBM128 (ret, value);
|
|
return ret;
|
|
}
|
|
|
|
/* Convert __ibm128 to __float128. */
|
|
TFtype
|
|
__trunctfkf2_hw (IBM128_TYPE value)
|
|
{
|
|
TFtype ret;
|
|
|
|
CVT_IBM128_TO_FLOAT128 (ret, value);
|
|
return ret;
|
|
}
|