void GCInfo::gcMarkRegPtrVal(GenTreePtr tree)
{
if (varTypeIsGC(tree->TypeGet()))
{
if (tree->gtOper == GT_LCL_VAR)
compiler->codeGen->genMarkLclVar(tree);
if (tree->InReg())
{
gcMarkRegSetNpt(genRegMask(tree->gtRegNum));
}
}
}
regNumber CodeGen::genAssignArithFloat(genTreeOps oper,
GenTreePtr dst, regNumber dstreg,
GenTreePtr src, regNumber srcreg)
{
regNumber result;
// dst should be a regvar or memory
if (dst->IsRegVar())
{
regNumber reg = dst->gtRegNum;
if (src->IsRegVar())
{
inst_RV_RV(ins_MathOp(oper, dst->gtType), reg, src->gtRegNum, dst->gtType);
}
else
{
inst_RV_TT(ins_MathOp(oper, dst->gtType), reg, src, 0, EmitSize(dst));
}
result = reg;
}
else // dst in memory
{
// since this is an asgop the ACTUAL destination is memory
// but it is also one of the sources and SSE ops do not allow mem dests
// so we have loaded it into a reg, and that is what dstreg represents
assert(dstreg != REG_NA);
if ( (src->InReg()))
{
inst_RV_RV(ins_MathOp(oper, dst->gtType), dstreg, src->gtRegNum, dst->gtType);
}
else
{
//mem mem operation
inst_RV_TT(ins_MathOp(oper, dst->gtType), dstreg, src, 0, EmitSize(dst));
}
dst->gtFlags &= ~GTF_REG_VAL; // ???
inst_TT_RV(ins_FloatStore(dst->gtType), dst, dstreg, 0, EmitSize(dst));
result = REG_NA;
}
return result;
}
void CodeGen::genComputeAddressableFloat(GenTreePtr tree,
regMaskTP addrRegInt,
regMaskTP addrRegFlt,
RegSet::KeepReg keptReg,
regMaskTP needReg,
RegSet::KeepReg keepReg,
bool freeOnly /* = false */)
{
noway_assert(genStillAddressable(tree));
noway_assert(varTypeIsFloating(tree->TypeGet()));
genDoneAddressableFloat(tree, addrRegInt, addrRegFlt, keptReg);
regNumber reg;
if (tree->InReg())
{
reg = tree->gtRegNum;
if (freeOnly && !(genRegMaskFloat(reg, tree->TypeGet()) & regSet.RegFreeFloat()))
{
goto LOAD_REG;
}
}
else
{
LOAD_REG:
RegSet::RegisterPreference pref(needReg, RBM_NONE);
reg = regSet.PickRegFloat(tree->TypeGet(), &pref);
genLoadFloat(tree, reg);
}
genMarkTreeInReg(tree, reg);
if (keepReg == RegSet::KEEP_REG)
{
regSet.SetUsedRegFloat(tree, true);
}
}