// pair of i64's.
def RetCC_F128HardFloat : CallingConv<[
CCBitConvertToType<f64>,
+
+ // Contrary to the ABI documentation, a struct containing a long double is
+ // returned in $f0, and $f1 instead of the usual $f0, and $f2. This is to
+ // match the de facto ABI as implemented by GCC.
+ CCIfInReg<CCAssignToReg<[D0_64, D1_64]>>,
+
CCAssignToReg<[D0_64, D2_64]>
]>;
return std::binary_search(LibCalls, End, CallSym, Comp);
}
-/// This function returns true if Ty is fp128 or i128 which was originally a
-/// fp128.
+/// This function returns true if Ty is fp128, {f128} or i128 which was
+/// originally a fp128.
static bool originalTypeIsF128(const Type *Ty, const SDNode *CallNode) {
if (Ty->isFP128Ty())
return true;
+ if (Ty->isStructTy() && Ty->getStructNumElements() == 1 &&
+ Ty->getStructElementType(0)->isFP128Ty())
+ return true;
+
const ExternalSymbolSDNode *ES =
dyn_cast_or_null<const ExternalSymbolSDNode>(CallNode);
--- /dev/null
+; RUN: llc -mtriple=mips64-linux-gnu -relocation-model=static -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=N32 %s
+; RUN: llc -mtriple=mips64el-linux-gnu -relocation-model=static -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=N32 %s
+
+; RUN: llc -mtriple=mips64-linux-gnu -relocation-model=static -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=N64 %s
+; RUN: llc -mtriple=mips64el-linux-gnu -relocation-model=static -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=N64 %s
+
+; Test return of {fp128} agrees with de-facto N32/N64 ABI.
+
+@struct_fp128 = global {fp128} zeroinitializer
+
+define inreg {fp128} @ret_struct_fp128() nounwind {
+entry:
+ %0 = load volatile {fp128}* @struct_fp128
+ ret {fp128} %0
+}
+
+; ALL-LABEL: ret_struct_fp128:
+
+; O32 generates different IR so we don't test it here. It returns the struct
+; indirectly.
+
+; Contrary to the N32/N64 ABI documentation, a struct containing a long double
+; is returned in $f0, and $f1 instead of the usual $f0, and $f2. This is to
+; match the de facto ABI as implemented by GCC.
+; N32-DAG: lui [[R1:\$[0-9]+]], %hi(struct_fp128)
+; N32-DAG: ld [[R2:\$[0-9]+]], %lo(struct_fp128)([[R1]])
+; N32-DAG: dmtc1 [[R2]], $f0
+; N32-DAG: addiu [[R3:\$[0-9]+]], [[R1]], %lo(struct_fp128)
+; N32-DAG: ld [[R4:\$[0-9]+]], 8([[R3]])
+; N32-DAG: dmtc1 [[R4]], $f1
+
+; N64-DAG: ld [[R1:\$[0-9]+]], %got_disp(struct_fp128)($1)
+; N64-DAG: ld [[R2:\$[0-9]+]], 0([[R1]])
+; N64-DAG: dmtc1 [[R2]], $f0
+; N64-DAG: ld [[R4:\$[0-9]+]], 8([[R1]])
+; N64-DAG: dmtc1 [[R4]], $f1