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Win64 fix: pass 64-bit reals as doubles

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This commit is contained in:
Martin 2014-10-26 20:51:41 +01:00
parent 9839cfb889
commit b8833b3d99
1 changed files with 12 additions and 3 deletions
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15
gen/abi-win64.cpp
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@ -45,6 +45,15 @@ static bool isComposite(const Type* t)
return t->ty == Tstruct || t->ty == Tsarray;
}
static bool realIs80bits()
{
#if LDC_LLVM_VER >= 305
return !global.params.targetTriple.isWindowsMSVCEnvironment();
#else
return true;
#endif
}
// Returns true if the D type is passed byval (the callee getting a pointer
// to a dedicated hidden copy).
static bool isPassedWithByvalSemantics(Type* t)
@ -53,7 +62,7 @@ static bool isPassedWithByvalSemantics(Type* t)
// * structs and static arrays which can NOT be rewritten as integers
(isComposite(t) && !canRewriteAsInt(t)) ||
// * 80-bit real and ireal
(t->ty == Tfloat80 || t->ty == Timaginary80) ||
((t->ty == Tfloat80 || t->ty == Timaginary80) && realIs80bits()) ||
// * cdouble and creal
(t->ty == Tcomplex64 || t->ty == Tcomplex80);
}
@ -159,7 +168,7 @@ bool Win64TargetABI::returnInArg(TypeFunction* tf)
// double) - except for cfloat
// 80-bit real/ireal is returned on top of the x87 stack: ST(0)
// complex numbers are returned in XMM0 & XMM1 (cfloat, cdouble)
// or ST(1) & ST(0) (creal)
// or ST(1) & ST(0) (80-bit creal)
// all other structs and static arrays are returned by struct-return (sret)
return isComposite(rt) && !canRewriteAsInt(rt);
}
@ -179,7 +188,7 @@ void Win64TargetABI::rewriteFunctionType(TypeFunction* tf, IrFuncTy &fty)
if (!tf->isref)
{
Type* rt = fty.ret->type->toBasetype();
if (rt->ty == Tcomplex80)
if (rt->ty == Tcomplex80 && realIs80bits())
{
// LLVM returns a '{real re, ireal im}' via ST(0) = re and ST(1) = im
// DMD does it the other way around: ST(0) = im and ST(1) = re