/**
* Load this item to a general purpose register.
*
* @param ec
*/
final void loadToGPR(EmitterContext ec) {
if (!isGPR()) {
X86Register r = ec.getGPRPool().request(JvmType.INT);
if (r == null) {
ec.getVStack().push(ec);
r = ec.getGPRPool().request(JvmType.INT);
}
if (VmUtils.verifyAssertions()) VmUtils._assert(r != null, "r != null");
loadTo(ec, (X86Register.GPR) r);
}
}
/**
* Load this item into a register that is suitable for BITS8 mode.
*
* @param ec
*/
final void loadToBITS8GPR(EmitterContext ec) {
if (!isGPR() || !gpr.isSuitableForBits8()) {
final X86RegisterPool pool = ec.getGPRPool();
X86Register r = pool.request(JvmType.INT, this, true);
if (r == null) {
ec.getVStack().push(ec);
r = ec.getGPRPool().request(JvmType.INT, this, true);
}
if (VmUtils.verifyAssertions()) VmUtils._assert(r != null, "r != null");
loadTo(ec, (X86Register.GPR) r);
}
}
/** @see org.jnode.vm.x86.compiler.l1a.Item#load(EmitterContext) */
final void load(EmitterContext ec) {
if (!isGPR()) {
final X86RegisterPool pool = ec.getGPRPool();
X86Register r = pool.request(getType(), this);
if (r == null) {
final VirtualStack vstack = ec.getVStack();
vstack.push(ec);
r = pool.request(getType(), this);
}
if (VmUtils.verifyAssertions()) VmUtils._assert(r != null, "r != null");
loadTo(ec, (X86Register.GPR) r);
}
if (VmUtils.verifyAssertions()) {
verifyState(ec);
}
}
/**
* @see org.jnode.vm.x86.compiler.l1a.Item#spill(EmitterContext,
* org.jnode.assembler.x86.X86Register)
*/
final void spill(EmitterContext ec, X86Register reg) {
if (VmUtils.verifyAssertions()) {
VmUtils._assert(
isGPR() && (this.gpr.getNr() == reg.getNr()), "spill1 gpr=" + gpr + ", reg=" + reg);
}
final X86RegisterPool pool = ec.getGPRPool();
X86Register r = pool.request(getType());
if (r == null) {
ec.getVStack().push(ec);
if (getKind() == Kind.STACK) {
return;
}
r = pool.request(getType());
if (VmUtils.verifyAssertions()) VmUtils._assert(r != null, "r != null");
}
loadTo(ec, (X86Register.GPR) r);
pool.transferOwnerTo(r, this);
if (VmUtils.verifyAssertions()) {
verifyState(ec);
}
}
/**
* Load item into the given register (only for Category 1 items), if its kind matches the mask.
*
* @param ec
* @param mask
* @param t0 the destination register
*/
final void loadToIf(EmitterContext ec, int mask, X86Register.GPR t0) {
if ((getKind() & mask) > 0) loadTo(ec, t0);
}
