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//===-- abi-ppc64.cpp -----------------------------------------------------===//
//
// LDC - the LLVM D compiler
//
// This file is distributed under the BSD-style LDC license. See the LICENSE
// file for details.
//
//===----------------------------------------------------------------------===//
//
// The ABI implementation used for 64 bit little-endian PowerPC targets.
//
// The PowerOpen 64bit ELF v2 ABI can be found here:
// https://members.openpowerfoundation.org/document/dl/576
//===----------------------------------------------------------------------===//
#include "gen/abi.h"
#include "gen/abi-generic.h"
#include "gen/abi-ppc64le.h"
#include "gen/dvalue.h"
#include "gen/irstate.h"
#include "gen/llvmhelpers.h"
#include "gen/tollvm.h"
struct PPC64LETargetABI : TargetABI {
HFVAToArray hfvaToArray;
CompositeToArray64 compositeToArray64;
IntegerRewrite integerRewrite;
explicit PPC64LETargetABI() : hfvaToArray(8) {}
bool returnInArg(TypeFunction *tf, bool) override {
if (tf->isref()) {
return false;
}
Type *rt = tf->next->toBasetype();
if (!isPOD(rt))
return true;
return passByVal(tf, rt);
}
bool passByVal(TypeFunction *, Type *t) override {
t = t->toBasetype();
return t->ty == TY::Tsarray || (t->ty == TY::Tstruct && t->size() > 16 &&
!isHFVA(t, hfvaToArray.maxElements));
}
void rewriteFunctionType(IrFuncTy &fty) override {
// return value
if (!fty.ret->byref) {
rewriteArgument(fty, *fty.ret);
}
// explicit parameters
for (auto arg : fty.args) {
if (!arg->byref) {
rewriteArgument(fty, *arg);
}
}
}
void rewriteArgument(IrFuncTy &fty, IrFuncTyArg &arg) override {
Type *ty = arg.type->toBasetype();
if (ty->ty == TY::Tstruct || ty->ty == TY::Tsarray) {
if (ty->ty == TY::Tstruct &&
isHFVA(ty, hfvaToArray.maxElements, &arg.ltype)) {
hfvaToArray.applyTo(arg, arg.ltype);
} else if (canRewriteAsInt(ty, true)) {
integerRewrite.applyTo(arg);
} else {
compositeToArray64.applyTo(arg);
}
} else if (ty->isintegral()) {
arg.attrs.addAttribute(ty->isunsigned() ? LLAttribute::ZExt
: LLAttribute::SExt);
}
}
};
// The public getter for abi.cpp
TargetABI *getPPC64LETargetABI() { return new PPC64LETargetABI(); }
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