/*
JPC: An x86 PC Hardware Emulator for a pure Java Virtual Machine
Copyright (C) 2012-2013 Ian Preston
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.
Details (including contact information) can be found at:
jpc.sourceforge.net
or the developer website
sourceforge.net/projects/jpc/
End of licence header
*/
package org.jpc.emulator.execution.opcodes.vm;
import org.jpc.emulator.execution.*;
import org.jpc.emulator.execution.decoder.*;
import org.jpc.emulator.processor.*;
import org.jpc.emulator.processor.fpu64.*;
import static org.jpc.emulator.processor.Processor.*;
public class fbstp_Mt_mem extends Executable
{
final Pointer op1;
public fbstp_Mt_mem(int blockStart, int eip, int prefices, PeekableInputStream input)
{
super(blockStart, eip);
int modrm = input.readU8();
op1 = Modrm.getPointer(prefices, modrm, input);
}
public Branch execute(Processor cpu)
{
byte[] data = new byte[10];
long n = (long)Math.abs(cpu.fpu.ST(0));
long decade = 1;
for (int i = 0; i < 9; i++)
{
int val = (int) ((n % (decade * 10)) / decade);
byte b = (byte) val;
decade *= 10;
val = (int) ((n % (decade * 10)) / decade);
b |= (val << 4);
data[i] = b;
}
data[9] = (cpu.fpu.ST(0) < 0) ? (byte)0x80 : (byte)0x00;
op1.setF80(cpu, data);
cpu.fpu.pop();
return Branch.None;
}
public boolean isBranch()
{
return false;
}
public String toString()
{
return this.getClass().getName();
}
}