/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* This 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.
*
* This 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 this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.vm.x86.compiler.l1b;
import org.jnode.assembler.Label;
import org.jnode.assembler.x86.X86Assembler;
import org.jnode.assembler.x86.X86Operation;
import org.jnode.assembler.x86.X86Register;
import org.jnode.vm.JvmType;
/**
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
final class FPCompilerSSE extends FPCompiler {
/**
* @param bcv
* @param os
* @param ec
* @param vstack
* @param arrayDataOffset
*/
public FPCompilerSSE(X86BytecodeVisitor bcv, X86Assembler os,
EmitterContext ec, VirtualStack vstack, int arrayDataOffset) {
super(bcv, os, ec, vstack, arrayDataOffset);
}
final void add(int type) {
arithOperation(type, X86Operation.SSE_ADD, true);
}
void compare(boolean gt, int type, Label curInstrLabel) {
// TODO Auto-generated method stub
}
void convert(int fromType, int toType) {
// TODO Auto-generated method stub
}
final void div(int type) {
arithOperation(type, X86Operation.SSE_DIV, false);
}
void fpaload(int type) {
// TODO Auto-generated method stub
}
final void mul(int type) {
arithOperation(type, X86Operation.SSE_MUL, true);
}
void neg(int type) {
// TODO Auto-generated method stub
}
final void rem(int type) {
// TODO implement me
//arithOperation(type, X86Operation.SSE_REM, false);
}
final void sub(int type) {
arithOperation(type, X86Operation.SSE_SUB, false);
}
/**
* Generate code for an SSE arithmatic operation.
*
* @param type
* @param operation
* @param commutative
*/
private final void arithOperation(int type, int operation, boolean commutative) {
final ItemFactory ifac = ec.getItemFactory();
Item v2 = vstack.pop(type);
Item v1 = vstack.pop(type);
if (v1.isConstant() && v2.isConstant()) {
final double fpv1 = getFPValue(v1);
final double fpv2 = getFPValue(v2);
vstack.push(createConst(ifac, type, fpv1 + fpv2));
} else {
if (prepareForOperation(v1, v2, commutative)) {
// Swap
final Item tmp = v2;
v2 = v1;
v1 = tmp;
}
final X86Register.XMM r1 = v1.getXMM();
switch (v2.getKind()) {
case Item.Kind.LOCAL:
if (type == JvmType.FLOAT) {
os.writeArithSSESOp(operation, r1, X86Register.EBP, v2.getOffsetToFP(ec));
} else {
os.writeArithSSEDOp(operation, r1, X86Register.EBP, v2.getOffsetToFP(ec));
}
break;
default:
if (type == JvmType.FLOAT) {
os.writeArithSSESOp(operation, r1, v2.getXMM());
} else {
os.writeArithSSEDOp(operation, r1, v2.getXMM());
}
}
v2.release(ec);
vstack.push(v1);
}
}
/**
* Prepare both operand for operand. At least one operand is loaded into a
* register. The other operand is constant, local or register.
*
* @param destAndSource
* @param source
* @param commutative
* @return True if the operand must be swapped. when not commutative, false
* is always returned.
*/
private final boolean prepareForOperation(Item destAndSource, Item source,
boolean commutative) {
// WARNING: source was on top of the virtual stack (thus higher than
// destAndSource)
// x86 can only deal with one complex argument
// destAndSource must be a register
source.loadToXMMIf(ec, ~Item.Kind.LOCAL);
destAndSource.loadToXMM(ec);
return false;
}
}