motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-05 16:53:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

Move target-arm/nwfpe into linux-user/arm/nwfpe

Browse source 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4185 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2008-04-09 06:53:01 +00:00
parent e771edab0d
commit 3ebdd11939
13 changed files with 1 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

117
linux-user/arm/nwfpe/fpa11_cpdo.c Normal file
View file

@ -0,0 +1,117 @@
/*
NetWinder Floating Point Emulator
(c) Rebel.COM, 1998,1999
Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
This program 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.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "fpa11.h"
#include "fpopcode.h"
unsigned int SingleCPDO(const unsigned int opcode);
unsigned int DoubleCPDO(const unsigned int opcode);
unsigned int ExtendedCPDO(const unsigned int opcode);
unsigned int EmulateCPDO(const unsigned int opcode)
{
FPA11 *fpa11 = GET_FPA11();
unsigned int Fd, nType, nDest, nRc = 1;
//printk("EmulateCPDO(0x%08x)\n",opcode);
/* Get the destination size. If not valid let Linux perform
an invalid instruction trap. */
nDest = getDestinationSize(opcode);
if (typeNone == nDest) return 0;
SetRoundingMode(opcode);
/* Compare the size of the operands in Fn and Fm.
Choose the largest size and perform operations in that size,
in order to make use of all the precision of the operands.
If Fm is a constant, we just grab a constant of a size
matching the size of the operand in Fn. */
if (MONADIC_INSTRUCTION(opcode))
nType = nDest;
else
nType = fpa11->fType[getFn(opcode)];
if (!CONSTANT_FM(opcode))
{
register unsigned int Fm = getFm(opcode);
if (nType < fpa11->fType[Fm])
{
nType = fpa11->fType[Fm];
}
}
switch (nType)
{
case typeSingle : nRc = SingleCPDO(opcode); break;
case typeDouble : nRc = DoubleCPDO(opcode); break;
case typeExtended : nRc = ExtendedCPDO(opcode); break;
default : nRc = 0;
}
/* If the operation succeeded, check to see if the result in the
destination register is the correct size. If not force it
to be. */
Fd = getFd(opcode);
nType = fpa11->fType[Fd];
if ((0 != nRc) && (nDest != nType))
{
switch (nDest)
{
case typeSingle:
{
if (typeDouble == nType)
fpa11->fpreg[Fd].fSingle =
float64_to_float32(fpa11->fpreg[Fd].fDouble, &fpa11->fp_status);
else
fpa11->fpreg[Fd].fSingle =
floatx80_to_float32(fpa11->fpreg[Fd].fExtended, &fpa11->fp_status);
}
break;
case typeDouble:
{
if (typeSingle == nType)
fpa11->fpreg[Fd].fDouble =
float32_to_float64(fpa11->fpreg[Fd].fSingle, &fpa11->fp_status);
else
fpa11->fpreg[Fd].fDouble =
floatx80_to_float64(fpa11->fpreg[Fd].fExtended, &fpa11->fp_status);
}
break;
case typeExtended:
{
if (typeSingle == nType)
fpa11->fpreg[Fd].fExtended =
float32_to_floatx80(fpa11->fpreg[Fd].fSingle, &fpa11->fp_status);
else
fpa11->fpreg[Fd].fExtended =
float64_to_floatx80(fpa11->fpreg[Fd].fDouble, &fpa11->fp_status);
}
break;
}
fpa11->fType[Fd] = nDest;
}
return nRc;
}