void moveRR(Context* con, unsigned srcSize, lir::Register* src,
unsigned dstSize, lir::Register* dst)
{
bool srcIsFpr = isFpr(src);
bool dstIsFpr = isFpr(dst);
if (srcIsFpr || dstIsFpr) { // FPR(s) involved
assert(con, srcSize == dstSize);
const bool dprec = srcSize == 8;
if (srcIsFpr && dstIsFpr) { // FPR to FPR
if (dprec) emit(con, fcpyd(fpr64(dst), fpr64(src))); // double
else emit(con, fcpys(fpr32(dst), fpr32(src))); // single
} else if (srcIsFpr) { // FPR to GPR
if (dprec) emit(con, fmrrd(dst->low, dst->high, fpr64(src)));
else emit(con, fmrs(dst->low, fpr32(src)));
} else { // GPR to FPR
if (dprec) emit(con, fmdrr(fpr64(dst->low), src->low, src->high));
else emit(con, fmsr(fpr32(dst), src->low));
}
return;
}
switch (srcSize) {
case 1:
emit(con, lsli(dst->low, src->low, 24));
emit(con, asri(dst->low, dst->low, 24));
break;
case 2:
emit(con, lsli(dst->low, src->low, 16));
emit(con, asri(dst->low, dst->low, 16));
break;
case 4:
case 8:
if (srcSize == 4 and dstSize == 8) {
moveRR(con, 4, src, 4, dst);
emit(con, asri(dst->high, src->low, 31));
} else if (srcSize == 8 and dstSize == 8) {
lir::Register srcHigh(src->high);
lir::Register dstHigh(dst->high);
if (src->high == dst->low) {
if (src->low == dst->high) {
swapRR(con, 4, src, 4, dst);
} else {
moveRR(con, 4, &srcHigh, 4, &dstHigh);
moveRR(con, 4, src, 4, dst);
}
} else {
moveRR(con, 4, src, 4, dst);
moveRR(con, 4, &srcHigh, 4, &dstHigh);
}
} else if (src->low != dst->low) {
emit(con, mov(dst->low, src->low));
}
break;
default: abort(con);
}
}
std::string Move::format() const
{
std::stringstream ret;
ret << "MOVE [" << srcLow() << ", " << srcHigh() << ") to [" << destLow() << ", " << destHigh() << ")";
return ret.str();
}
