DValue *DtoComplexAdd(Loc &loc, Type *type, DValue *lhs, DValue *rhs) {
llvm::Value *lhs_re, *lhs_im, *rhs_re, *rhs_im, *res_re, *res_im;
// lhs values
DtoGetComplexParts(loc, type, lhs, lhs_re, lhs_im);
// rhs values
DtoGetComplexParts(loc, type, rhs, rhs_re, rhs_im);
// add up
if (lhs_re && rhs_re) {
res_re = gIR->ir->CreateFAdd(lhs_re, rhs_re);
} else if (lhs_re) {
res_re = lhs_re;
} else { // either rhs_re or no re at all (then use any)
res_re = rhs_re;
}
if (lhs_im && rhs_im) {
res_im = gIR->ir->CreateFAdd(lhs_im, rhs_im);
} else if (lhs_im) {
res_im = lhs_im;
} else { // either rhs_im or no im at all (then use any)
res_im = rhs_im;
}
LLValue *res = DtoAggrPair(DtoType(type), res_re, res_im);
return new DImValue(type, res);
}
DValue* DtoComplexSub(Loc& loc, Type* type, DValue* lhs, DValue* rhs)
{
llvm::Value *lhs_re, *lhs_im, *rhs_re, *rhs_im, *res_re, *res_im;
// lhs values
DtoGetComplexParts(loc, type, lhs, lhs_re, lhs_im);
// rhs values
DtoGetComplexParts(loc, type, rhs, rhs_re, rhs_im);
// add up
if(lhs_re && rhs_re)
res_re = gIR->ir->CreateFSub(lhs_re, rhs_re, "tmp");
else if(lhs_re)
res_re = lhs_re;
else // either rhs_re or no re at all (then use any)
res_re = gIR->ir->CreateFNeg(rhs_re, "neg");
if(lhs_im && rhs_im)
res_im = gIR->ir->CreateFSub(lhs_im, rhs_im, "tmp");
else if(lhs_im)
res_im = lhs_im;
else // either rhs_im or no im at all (then use any)
res_im = gIR->ir->CreateFNeg(rhs_im, "neg");
LLValue* res = DtoAggrPair(DtoType(type), res_re, res_im);
return new DImValue(type, res);
}
DValue *DtoComplexMul(Loc &loc, Type *type, DValue *lhs, DValue *rhs) {
llvm::Value *lhs_re, *lhs_im, *rhs_re, *rhs_im, *res_re, *res_im;
// lhs values
DtoGetComplexParts(loc, type, lhs, lhs_re, lhs_im);
// rhs values
DtoGetComplexParts(loc, type, rhs, rhs_re, rhs_im);
// mul up
llvm::Value *rere = nullptr;
llvm::Value *reim = nullptr;
llvm::Value *imre = nullptr;
llvm::Value *imim = nullptr;
if (lhs_re && rhs_re) {
rere = gIR->ir->CreateFMul(lhs_re, rhs_re, "rere_mul");
}
if (lhs_re && rhs_im) {
reim = gIR->ir->CreateFMul(lhs_re, rhs_im, "reim_mul");
}
if (lhs_im && rhs_re) {
imre = gIR->ir->CreateFMul(lhs_im, rhs_re, "imre_mul");
}
if (lhs_im && rhs_im) {
imim = gIR->ir->CreateFMul(lhs_im, rhs_im, "imim_mul");
}
if (rere && imim) {
res_re = gIR->ir->CreateFSub(rere, imim, "rere_imim_sub");
} else if (rere) {
res_re = rere;
} else if (imim) {
res_re = gIR->ir->CreateFNeg(imim, "imim_neg");
} else {
res_re = lhs_re ? rhs_re : lhs_re; // null!
}
if (reim && imre) {
res_im = gIR->ir->CreateFAdd(reim, imre, "reim_imre_add");
} else if (reim) {
res_im = reim;
} else if (imre) {
res_im = imre;
} else {
res_im = lhs_re ? rhs_im : lhs_re; // null!
}
LLValue *res = DtoAggrPair(DtoType(type), res_re, res_im);
return new DImValue(type, res);
}
DValue* DtoComplex(Loc& loc, Type* to, DValue* val)
{
LLType* complexTy = DtoType(to);
Type* baserety;
Type* baseimty;
switch (to->toBasetype()->ty) {
default: llvm_unreachable("Unexpected complex floating point type");
case Tcomplex32:
baserety = Type::tfloat32;
baseimty = Type::timaginary32;
break;
case Tcomplex64:
baserety = Type::tfloat64;
baseimty = Type::timaginary64;
break;
case Tcomplex80:
baserety = Type::tfloat80;
baseimty = Type::timaginary80;
break;
}
LLValue *re, *im;
DtoGetComplexParts(loc, to, val, re, im);
if(!re)
re = LLConstant::getNullValue(DtoType(baserety));
if(!im)
im = LLConstant::getNullValue(DtoType(baseimty));
LLValue* res = DtoAggrPair(complexTy, re, im);
return new DImValue(to, res);
}
DValue* DtoCastComplex(Loc& loc, DValue* val, Type* _to)
{
Type* to = _to->toBasetype();
Type* vty = val->getType()->toBasetype();
if (to->iscomplex()) {
if (vty->size() == to->size())
return val;
llvm::Value *re, *im;
DtoGetComplexParts(loc, val->getType(), val, re, im);
LLType* toty = DtoComplexBaseType(to);
if (to->size() < vty->size()) {
re = gIR->ir->CreateFPTrunc(re, toty, "tmp");
im = gIR->ir->CreateFPTrunc(im, toty, "tmp");
}
else {
re = gIR->ir->CreateFPExt(re, toty, "tmp");
im = gIR->ir->CreateFPExt(im, toty, "tmp");
}
LLValue* pair = DtoAggrPair(DtoType(_to), re, im);
return new DImValue(_to, pair);
}
else if (to->isimaginary()) {
// FIXME: this loads both values, even when we only need one
LLValue* v = val->getRVal();
LLValue* impart = gIR->ir->CreateExtractValue(v, 1, ".im_part");
Type *extractty;
switch (vty->ty) {
default: llvm_unreachable("Unexpected complex floating point type");
case Tcomplex32: extractty = Type::timaginary32; break;
case Tcomplex64: extractty = Type::timaginary64; break;
case Tcomplex80: extractty = Type::timaginary80; break;
}
DImValue* im = new DImValue(extractty, impart);
return DtoCastFloat(loc, im, to);
}
else if (to->ty == Tbool) {
return new DImValue(_to, DtoComplexEquals(loc, TOKnotequal, val, DtoNullValue(vty)));
}
else if (to->isfloating() || to->isintegral()) {
// FIXME: this loads both values, even when we only need one
LLValue* v = val->getRVal();
LLValue* repart = gIR->ir->CreateExtractValue(v, 0, ".re_part");
Type *extractty;
switch (vty->ty) {
default: llvm_unreachable("Unexpected complex floating point type");
case Tcomplex32: extractty = Type::tfloat32; break;
case Tcomplex64: extractty = Type::tfloat64; break;
case Tcomplex80: extractty = Type::tfloat80; break;
}
DImValue* re = new DImValue(extractty, repart);
return DtoCastFloat(loc, re, to);
}
else {
error(loc, "Don't know how to cast %s to %s", vty->toChars(), to->toChars());
fatal();
}
}
void DtoGetComplexParts(Loc& loc, Type* to, DValue* val, LLValue*& re, LLValue*& im)
{
DValue *dre, *dim;
DtoGetComplexParts(loc, to, val, dre, dim);
re = dre ? dre->getRVal() : 0;
im = dim ? dim->getRVal() : 0;
}
void DtoGetComplexParts(Loc &loc, Type *to, DValue *val, LLValue *&re,
LLValue *&im) {
DValue *dre, *dim;
DtoGetComplexParts(loc, to, val, dre, dim);
re = dre ? DtoRVal(dre) : nullptr;
im = dim ? DtoRVal(dim) : nullptr;
}
LLValue *DtoComplexEquals(Loc &loc, TOK op, DValue *lhs, DValue *rhs) {
DValue *lhs_re, *lhs_im, *rhs_re, *rhs_im;
// lhs values
DtoGetComplexParts(loc, lhs->type, lhs, lhs_re, lhs_im);
// rhs values
DtoGetComplexParts(loc, lhs->type, rhs, rhs_re, rhs_im);
// (l.re==r.re && l.im==r.im) or (l.re!=r.re || l.im!=r.im)
LLValue *b1 = DtoBinFloatsEquals(loc, lhs_re, rhs_re, op);
LLValue *b2 = DtoBinFloatsEquals(loc, lhs_im, rhs_im, op);
if (op == TOKequal) {
return gIR->ir->CreateAnd(b1, b2);
}
return gIR->ir->CreateOr(b1, b2);
}
DValue *DtoComplexRem(Loc &loc, Type *type, DValue *lhs, DValue *rhs) {
llvm::Value *lhs_re, *lhs_im, *rhs_re, *rhs_im, *res_re, *res_im, *divisor;
// lhs values
DtoGetComplexParts(loc, type, lhs, lhs_re, lhs_im);
// rhs values
DtoGetComplexParts(loc, type, rhs, rhs_re, rhs_im);
// Divisor can be real or imaginary but not complex
assert((rhs_re != 0) ^ (rhs_im != 0));
divisor = rhs_re ? rhs_re : rhs_im;
res_re = lhs_re ? gIR->ir->CreateFRem(lhs_re, divisor) : lhs_re;
res_im = lhs_re ? gIR->ir->CreateFRem(lhs_im, divisor) : lhs_im;
LLValue *res = DtoAggrPair(DtoType(type), res_re, res_im);
return new DImValue(type, res);
}
void DtoGetComplexParts(Loc &loc, Type *to, DValue *val, DValue *&re,
DValue *&im) {
Type *baserety;
Type *baseimty;
switch (to->toBasetype()->ty) {
default:
llvm_unreachable("Unexpected complex floating point type");
case Tcomplex32:
baserety = Type::tfloat32;
baseimty = Type::timaginary32;
break;
case Tcomplex64:
baserety = Type::tfloat64;
baseimty = Type::timaginary64;
break;
case Tcomplex80:
baserety = Type::tfloat80;
baseimty = Type::timaginary80;
break;
}
Type *t = val->getType()->toBasetype();
if (t->iscomplex()) {
DValue *v = DtoCastComplex(loc, val, to);
if (to->iscomplex()) {
if (v->isLVal()) {
LLValue *reVal =
DtoGEPi(v->getLVal(), 0, 0, ".re_part");
LLValue *imVal =
DtoGEPi(v->getLVal(), 0, 1, ".im_part");
re = new DVarValue(baserety, reVal);
im = new DVarValue(baseimty, imVal);
} else {
LLValue *reVal =
gIR->ir->CreateExtractValue(v->getRVal(), 0, ".re_part");
LLValue *imVal =
gIR->ir->CreateExtractValue(v->getRVal(), 1, ".im_part");
re = new DImValue(baserety, reVal);
im = new DImValue(baseimty, imVal);
}
} else {
DtoGetComplexParts(loc, to, v, re, im);
}
} else if (t->isimaginary()) {
re = nullptr;
im = DtoCastFloat(loc, val, baseimty);
} else if (t->isfloating()) {
re = DtoCastFloat(loc, val, baserety);
im = nullptr;
} else if (t->isintegral()) {
re = DtoCastInt(loc, val, baserety);
im = nullptr;
} else {
llvm_unreachable("Unexpected numeric type.");
}
}
DValue *DtoComplexNeg(Loc &loc, Type *type, DValue *val) {
llvm::Value *a, *b, *re, *im;
// values
DtoGetComplexParts(loc, type, val, a, b);
// neg up
assert(a && b);
re = gIR->ir->CreateFNeg(a);
im = gIR->ir->CreateFNeg(b);
LLValue *res = DtoAggrPair(DtoType(type), re, im);
return new DImValue(type, res);
}
DValue* DtoComplexDiv(Loc& loc, Type* type, DValue* lhs, DValue* rhs)
{
llvm::Value *lhs_re, *lhs_im, *rhs_re, *rhs_im, *res_re, *res_im;
// lhs values
DtoGetComplexParts(loc, type, lhs, lhs_re, lhs_im);
// rhs values
DtoGetComplexParts(loc, type, rhs, rhs_re, rhs_im);
// if divisor is only real, division is simple
if(rhs_re && !rhs_im) {
if(lhs_re)
res_re = gIR->ir->CreateFDiv(lhs_re, rhs_re, "re_divby_re");
else
res_re = lhs_re;
if(lhs_im)
res_im = gIR->ir->CreateFDiv(lhs_im, rhs_re, "im_divby_re");
else
res_im = lhs_im;
}
// if divisor is only imaginary, division is simple too
else if(!rhs_re && rhs_im) {
if(lhs_re)
res_im = gIR->ir->CreateFNeg(gIR->ir->CreateFDiv(lhs_re, rhs_im, "re_divby_im"), "neg");
else
res_im = lhs_re;
if(lhs_im)
res_re = gIR->ir->CreateFDiv(lhs_im, rhs_im, "im_divby_im");
else
res_re = lhs_im;
}
// full division
else {
llvm::Value *tmp1, *tmp2, *denom;
if(lhs_re && lhs_im) {
tmp1 = gIR->ir->CreateFMul(lhs_re, rhs_re, "rere");
tmp2 = gIR->ir->CreateFMul(lhs_im, rhs_im, "imim");
res_re = gIR->ir->CreateFAdd(tmp1, tmp2, "rere_plus_imim");
tmp1 = gIR->ir->CreateFMul(lhs_re, rhs_im, "reim");
tmp2 = gIR->ir->CreateFMul(lhs_im, rhs_re, "imre");
res_im = gIR->ir->CreateFSub(tmp2, tmp1, "imre_sub_reim");
}
else if(lhs_re) {
res_re = gIR->ir->CreateFMul(lhs_re, rhs_re, "rere");
res_im = gIR->ir->CreateFMul(lhs_re, rhs_im, "reim");
res_im = gIR->ir->CreateFNeg(res_im);
}
else if(lhs_im) {
res_re = gIR->ir->CreateFMul(lhs_im, rhs_im, "imim");
res_im = gIR->ir->CreateFMul(lhs_im, rhs_re, "imre");
}
else
assert(0 && "lhs has neither real nor imaginary part");
tmp1 = gIR->ir->CreateFMul(rhs_re, rhs_re, "rhs_resq");
tmp2 = gIR->ir->CreateFMul(rhs_im, rhs_im, "rhs_imsq");
denom = gIR->ir->CreateFAdd(tmp1, tmp2, "denom");
res_re = gIR->ir->CreateFDiv(res_re, denom, "res_re");
res_im = gIR->ir->CreateFDiv(res_im, denom, "res_im");
}
LLValue* res = DtoAggrPair(DtoType(type), res_re, res_im);
return new DImValue(type, res);
}
