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502 lines
14 KiB
C++
502 lines
14 KiB
C++
//===-- complex.cpp -------------------------------------------------------===//
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//
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// LDC – the LLVM D compiler
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//
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// This file is distributed under the BSD-style LDC license. See the LICENSE
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// file for details.
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//
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//===----------------------------------------------------------------------===//
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#include "gen/complex.h"
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#include "declaration.h"
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#include "mtype.h"
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#include "gen/binops.h"
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#include "gen/dvalue.h"
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#include "gen/irstate.h"
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#include "gen/llvm.h"
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#include "gen/llvmhelpers.h"
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#include "gen/logger.h"
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#include "gen/tollvm.h"
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////////////////////////////////////////////////////////////////////////////////
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llvm::StructType *DtoComplexType(Type *type) {
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Type *t = type->toBasetype();
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LLType *base = DtoComplexBaseType(t);
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LLType *types[] = {base, base};
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return llvm::StructType::get(gIR->context(), types, false);
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}
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LLType *DtoComplexBaseType(Type *t) {
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switch (t->toBasetype()->ty) {
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default:
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llvm_unreachable("Unexpected complex floating point type");
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case Tcomplex32:
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return DtoType(Type::basic[Tfloat32]);
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case Tcomplex64:
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return DtoType(Type::basic[Tfloat64]);
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case Tcomplex80:
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return DtoType(Type::basic[Tfloat80]);
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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LLConstant *DtoConstComplex(Type *_ty, longdouble re, longdouble im) {
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Type *base = nullptr;
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switch (_ty->toBasetype()->ty) {
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default:
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llvm_unreachable("Unexpected complex floating point type");
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case Tcomplex32:
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base = Type::tfloat32;
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break;
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case Tcomplex64:
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base = Type::tfloat64;
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break;
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case Tcomplex80:
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base = Type::tfloat80;
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break;
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}
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LLConstant *inits[] = {DtoConstFP(base, re), DtoConstFP(base, im)};
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return llvm::ConstantStruct::get(DtoComplexType(_ty),
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llvm::ArrayRef<LLConstant *>(inits));
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}
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////////////////////////////////////////////////////////////////////////////////
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DValue *DtoComplex(Loc &loc, Type *to, DValue *val) {
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LLType *complexTy = DtoType(to);
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Type *baserety;
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Type *baseimty;
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switch (to->toBasetype()->ty) {
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default:
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llvm_unreachable("Unexpected complex floating point type");
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case Tcomplex32:
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baserety = Type::tfloat32;
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baseimty = Type::timaginary32;
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break;
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case Tcomplex64:
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baserety = Type::tfloat64;
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baseimty = Type::timaginary64;
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break;
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case Tcomplex80:
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baserety = Type::tfloat80;
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baseimty = Type::timaginary80;
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break;
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}
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LLValue *re, *im;
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DtoGetComplexParts(loc, to, val, re, im);
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if (!re) {
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re = LLConstant::getNullValue(DtoType(baserety));
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}
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if (!im) {
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im = LLConstant::getNullValue(DtoType(baseimty));
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}
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LLValue *res = DtoAggrPair(complexTy, re, im);
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return new DImValue(to, res);
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}
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////////////////////////////////////////////////////////////////////////////////
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void DtoComplexSet(LLValue *c, LLValue *re, LLValue *im) {
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DtoStore(re, DtoGEPi(c, 0, 0));
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DtoStore(im, DtoGEPi(c, 0, 1));
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}
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////////////////////////////////////////////////////////////////////////////////
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void DtoGetComplexParts(Loc &loc, Type *to, DValue *val, DValue *&re,
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DValue *&im) {
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Type *baserety;
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Type *baseimty;
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switch (to->toBasetype()->ty) {
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default:
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llvm_unreachable("Unexpected complex floating point type");
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case Tcomplex32:
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baserety = Type::tfloat32;
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baseimty = Type::timaginary32;
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break;
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case Tcomplex64:
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baserety = Type::tfloat64;
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baseimty = Type::timaginary64;
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break;
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case Tcomplex80:
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baserety = Type::tfloat80;
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baseimty = Type::timaginary80;
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break;
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}
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Type *t = val->type->toBasetype();
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if (t->iscomplex()) {
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DValue *v = DtoCastComplex(loc, val, to);
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if (to->iscomplex()) {
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if (v->isLVal()) {
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LLValue *reVal =
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DtoGEPi(DtoLVal(v), 0, 0, ".re_part");
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LLValue *imVal =
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DtoGEPi(DtoLVal(v), 0, 1, ".im_part");
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re = new DLValue(baserety, reVal);
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im = new DLValue(baseimty, imVal);
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} else {
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LLValue *reVal =
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gIR->ir->CreateExtractValue(DtoRVal(v), 0, ".re_part");
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LLValue *imVal =
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gIR->ir->CreateExtractValue(DtoRVal(v), 1, ".im_part");
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re = new DImValue(baserety, reVal);
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im = new DImValue(baseimty, imVal);
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}
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} else {
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DtoGetComplexParts(loc, to, v, re, im);
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}
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} else if (t->isimaginary()) {
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re = nullptr;
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im = DtoCastFloat(loc, val, baseimty);
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} else if (t->isfloating()) {
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re = DtoCastFloat(loc, val, baserety);
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im = nullptr;
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} else if (t->isintegral()) {
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re = DtoCastInt(loc, val, baserety);
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im = nullptr;
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} else {
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llvm_unreachable("Unexpected numeric type.");
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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void DtoGetComplexParts(Loc &loc, Type *to, DValue *val, LLValue *&re,
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LLValue *&im) {
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DValue *dre, *dim;
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DtoGetComplexParts(loc, to, val, dre, dim);
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re = dre ? DtoRVal(dre) : nullptr;
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im = dim ? DtoRVal(dim) : nullptr;
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}
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////////////////////////////////////////////////////////////////////////////////
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DImValue *DtoComplexAdd(Loc &loc, Type *type, DRValue *lhs, DRValue *rhs) {
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llvm::Value *lhs_re, *lhs_im, *rhs_re, *rhs_im, *res_re, *res_im;
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// lhs values
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DtoGetComplexParts(loc, type, lhs, lhs_re, lhs_im);
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// rhs values
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DtoGetComplexParts(loc, type, rhs, rhs_re, rhs_im);
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// add up
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if (lhs_re && rhs_re) {
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res_re = gIR->ir->CreateFAdd(lhs_re, rhs_re);
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} else if (lhs_re) {
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res_re = lhs_re;
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} else { // either rhs_re or no re at all (then use any)
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res_re = rhs_re;
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}
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if (lhs_im && rhs_im) {
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res_im = gIR->ir->CreateFAdd(lhs_im, rhs_im);
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} else if (lhs_im) {
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res_im = lhs_im;
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} else { // either rhs_im or no im at all (then use any)
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res_im = rhs_im;
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}
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LLValue *res = DtoAggrPair(DtoType(type), res_re, res_im);
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return new DImValue(type, res);
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}
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////////////////////////////////////////////////////////////////////////////////
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DImValue *DtoComplexMin(Loc &loc, Type *type, DRValue *lhs, DRValue *rhs) {
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llvm::Value *lhs_re, *lhs_im, *rhs_re, *rhs_im, *res_re, *res_im;
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// lhs values
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DtoGetComplexParts(loc, type, lhs, lhs_re, lhs_im);
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// rhs values
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DtoGetComplexParts(loc, type, rhs, rhs_re, rhs_im);
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// add up
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if (lhs_re && rhs_re) {
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res_re = gIR->ir->CreateFSub(lhs_re, rhs_re);
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} else if (lhs_re) {
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res_re = lhs_re;
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} else { // either rhs_re or no re at all (then use any)
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res_re = gIR->ir->CreateFNeg(rhs_re, "neg");
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}
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if (lhs_im && rhs_im) {
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res_im = gIR->ir->CreateFSub(lhs_im, rhs_im);
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} else if (lhs_im) {
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res_im = lhs_im;
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} else { // either rhs_im or no im at all (then use any)
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res_im = gIR->ir->CreateFNeg(rhs_im, "neg");
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}
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LLValue *res = DtoAggrPair(DtoType(type), res_re, res_im);
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return new DImValue(type, res);
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}
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////////////////////////////////////////////////////////////////////////////////
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DImValue *DtoComplexMul(Loc &loc, Type *type, DRValue *lhs, DRValue *rhs) {
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llvm::Value *lhs_re, *lhs_im, *rhs_re, *rhs_im, *res_re, *res_im;
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// lhs values
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DtoGetComplexParts(loc, type, lhs, lhs_re, lhs_im);
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// rhs values
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DtoGetComplexParts(loc, type, rhs, rhs_re, rhs_im);
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// mul up
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llvm::Value *rere = nullptr;
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llvm::Value *reim = nullptr;
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llvm::Value *imre = nullptr;
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llvm::Value *imim = nullptr;
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if (lhs_re && rhs_re) {
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rere = gIR->ir->CreateFMul(lhs_re, rhs_re, "rere_mul");
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}
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if (lhs_re && rhs_im) {
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reim = gIR->ir->CreateFMul(lhs_re, rhs_im, "reim_mul");
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}
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if (lhs_im && rhs_re) {
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imre = gIR->ir->CreateFMul(lhs_im, rhs_re, "imre_mul");
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}
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if (lhs_im && rhs_im) {
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imim = gIR->ir->CreateFMul(lhs_im, rhs_im, "imim_mul");
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}
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if (rere && imim) {
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res_re = gIR->ir->CreateFSub(rere, imim, "rere_imim_sub");
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} else if (rere) {
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res_re = rere;
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} else if (imim) {
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res_re = gIR->ir->CreateFNeg(imim, "imim_neg");
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} else {
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res_re = lhs_re ? rhs_re : lhs_re; // null!
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}
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if (reim && imre) {
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res_im = gIR->ir->CreateFAdd(reim, imre, "reim_imre_add");
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} else if (reim) {
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res_im = reim;
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} else if (imre) {
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res_im = imre;
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} else {
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res_im = lhs_re ? rhs_im : lhs_re; // null!
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}
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LLValue *res = DtoAggrPair(DtoType(type), res_re, res_im);
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return new DImValue(type, res);
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}
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////////////////////////////////////////////////////////////////////////////////
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DImValue *DtoComplexDiv(Loc &loc, Type *type, DRValue *lhs, DRValue *rhs) {
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llvm::Value *lhs_re, *lhs_im, *rhs_re, *rhs_im, *res_re, *res_im;
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// lhs values
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DtoGetComplexParts(loc, type, lhs, lhs_re, lhs_im);
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// rhs values
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DtoGetComplexParts(loc, type, rhs, rhs_re, rhs_im);
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// if divisor is only real, division is simple
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if (rhs_re && !rhs_im) {
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if (lhs_re) {
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res_re = gIR->ir->CreateFDiv(lhs_re, rhs_re, "re_divby_re");
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} else {
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res_re = lhs_re;
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}
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if (lhs_im) {
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res_im = gIR->ir->CreateFDiv(lhs_im, rhs_re, "im_divby_re");
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} else {
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res_im = lhs_im;
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}
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}
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// if divisor is only imaginary, division is simple too
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else if (!rhs_re && rhs_im) {
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if (lhs_re) {
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res_im = gIR->ir->CreateFNeg(
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gIR->ir->CreateFDiv(lhs_re, rhs_im, "re_divby_im"), "neg");
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} else {
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res_im = lhs_re;
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}
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if (lhs_im) {
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res_re = gIR->ir->CreateFDiv(lhs_im, rhs_im, "im_divby_im");
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} else {
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res_re = lhs_im;
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}
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}
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// full division
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else {
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llvm::Value *tmp1, *tmp2, *denom;
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if (lhs_re && lhs_im) {
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tmp1 = gIR->ir->CreateFMul(lhs_re, rhs_re, "rere");
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tmp2 = gIR->ir->CreateFMul(lhs_im, rhs_im, "imim");
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res_re = gIR->ir->CreateFAdd(tmp1, tmp2, "rere_plus_imim");
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tmp1 = gIR->ir->CreateFMul(lhs_re, rhs_im, "reim");
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tmp2 = gIR->ir->CreateFMul(lhs_im, rhs_re, "imre");
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res_im = gIR->ir->CreateFSub(tmp2, tmp1, "imre_sub_reim");
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} else if (lhs_re) {
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res_re = gIR->ir->CreateFMul(lhs_re, rhs_re, "rere");
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res_im = gIR->ir->CreateFMul(lhs_re, rhs_im, "reim");
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res_im = gIR->ir->CreateFNeg(res_im);
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} else if (lhs_im) {
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res_re = gIR->ir->CreateFMul(lhs_im, rhs_im, "imim");
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res_im = gIR->ir->CreateFMul(lhs_im, rhs_re, "imre");
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} else {
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llvm_unreachable("lhs has neither real nor imaginary part");
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}
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tmp1 = gIR->ir->CreateFMul(rhs_re, rhs_re, "rhs_resq");
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tmp2 = gIR->ir->CreateFMul(rhs_im, rhs_im, "rhs_imsq");
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denom = gIR->ir->CreateFAdd(tmp1, tmp2, "denom");
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res_re = gIR->ir->CreateFDiv(res_re, denom, "res_re");
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res_im = gIR->ir->CreateFDiv(res_im, denom, "res_im");
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}
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LLValue *res = DtoAggrPair(DtoType(type), res_re, res_im);
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return new DImValue(type, res);
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}
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////////////////////////////////////////////////////////////////////////////////
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DImValue *DtoComplexMod(Loc &loc, Type *type, DRValue *lhs, DRValue *rhs) {
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llvm::Value *lhs_re, *lhs_im, *rhs_re, *rhs_im, *res_re, *res_im, *divisor;
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// lhs values
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DtoGetComplexParts(loc, type, lhs, lhs_re, lhs_im);
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// rhs values
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DtoGetComplexParts(loc, type, rhs, rhs_re, rhs_im);
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// Divisor can be real or imaginary but not complex
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assert((rhs_re != 0) ^ (rhs_im != 0));
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divisor = rhs_re ? rhs_re : rhs_im;
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res_re = lhs_re ? gIR->ir->CreateFRem(lhs_re, divisor) : lhs_re;
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res_im = lhs_re ? gIR->ir->CreateFRem(lhs_im, divisor) : lhs_im;
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LLValue *res = DtoAggrPair(DtoType(type), res_re, res_im);
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return new DImValue(type, res);
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}
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////////////////////////////////////////////////////////////////////////////////
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DImValue *DtoComplexNeg(Loc &loc, Type *type, DRValue *val) {
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llvm::Value *a, *b, *re, *im;
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// values
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DtoGetComplexParts(loc, type, val, a, b);
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// neg up
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assert(a && b);
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re = gIR->ir->CreateFNeg(a);
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im = gIR->ir->CreateFNeg(b);
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LLValue *res = DtoAggrPair(DtoType(type), re, im);
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return new DImValue(type, res);
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}
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////////////////////////////////////////////////////////////////////////////////
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LLValue *DtoComplexEquals(Loc &loc, TOK op, DValue *lhs, DValue *rhs) {
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DValue *lhs_re, *lhs_im, *rhs_re, *rhs_im;
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// lhs values
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DtoGetComplexParts(loc, lhs->type, lhs, lhs_re, lhs_im);
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// rhs values
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DtoGetComplexParts(loc, lhs->type, rhs, rhs_re, rhs_im);
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// (l.re==r.re && l.im==r.im) or (l.re!=r.re || l.im!=r.im)
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LLValue *b1 = DtoBinFloatsEquals(loc, lhs_re, rhs_re, op);
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LLValue *b2 = DtoBinFloatsEquals(loc, lhs_im, rhs_im, op);
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if (op == TOKequal) {
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return gIR->ir->CreateAnd(b1, b2);
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}
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return gIR->ir->CreateOr(b1, b2);
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}
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////////////////////////////////////////////////////////////////////////////////
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DValue *DtoCastComplex(Loc &loc, DValue *val, Type *_to) {
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Type *to = _to->toBasetype();
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Type *vty = val->type->toBasetype();
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if (to->iscomplex()) {
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if (vty->size() == to->size()) {
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return val;
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}
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llvm::Value *re, *im;
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DtoGetComplexParts(loc, val->type, val, re, im);
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LLType *toty = DtoComplexBaseType(to);
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if (to->size() < vty->size()) {
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re = gIR->ir->CreateFPTrunc(re, toty);
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im = gIR->ir->CreateFPTrunc(im, toty);
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} else {
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re = gIR->ir->CreateFPExt(re, toty);
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im = gIR->ir->CreateFPExt(im, toty);
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}
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LLValue *pair = DtoAggrPair(DtoType(_to), re, im);
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return new DImValue(_to, pair);
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}
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if (to->isimaginary()) {
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// FIXME: this loads both values, even when we only need one
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LLValue *v = DtoRVal(val);
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LLValue *impart = gIR->ir->CreateExtractValue(v, 1, ".im_part");
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Type *extractty;
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switch (vty->ty) {
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default:
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llvm_unreachable("Unexpected complex floating point type");
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case Tcomplex32:
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extractty = Type::timaginary32;
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break;
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case Tcomplex64:
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extractty = Type::timaginary64;
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break;
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case Tcomplex80:
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extractty = Type::timaginary80;
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break;
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}
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auto im = new DImValue(extractty, impart);
|
||
return DtoCastFloat(loc, im, to);
|
||
}
|
||
if (to->ty == Tbool) {
|
||
return new DImValue(
|
||
_to, DtoComplexEquals(loc, TOKnotequal, val, DtoNullValue(vty)));
|
||
}
|
||
if (to->isfloating() || to->isintegral()) {
|
||
// FIXME: this loads both values, even when we only need one
|
||
LLValue *v = DtoRVal(val);
|
||
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;
|
||
}
|
||
auto re = new DImValue(extractty, repart);
|
||
return DtoCastFloat(loc, re, to);
|
||
}
|
||
error(loc, "Don't know how to cast %s to %s", vty->toChars(), to->toChars());
|
||
fatal();
|
||
}
|