[PowerPC] [Clang] Add vector int128 pack/unpack builtins

unsigned long long builtin_unpack_vector_int128 (vector int128_t, int);
vector int128_t builtin_pack_vector_int128 (unsigned long long, unsigned long long);

Builtins should behave the same way as in GCC.

Patch By: wuzish (Zixuan Wu)
Differential Revision: https://reviews.llvm.org/D52074

llvm-svn: 342614

clang/include/clang/Basic/BuiltinsPPC.def

@@ -470,6 +470,10 @@ BUILTIN(__builtin_divde, "SLLiSLLiSLLi", "")
 BUILTIN(__builtin_divdeu, "ULLiULLiULLi", "")
 BUILTIN(__builtin_bpermd, "SLLiSLLiSLLi", "")
 
+// Vector int128 (un)pack
+BUILTIN(__builtin_unpack_vector_int128, "ULLiV1LLLii", "")
+BUILTIN(__builtin_pack_vector_int128, "V1LLLiULLiULLi", "")
+
 // FIXME: Obviously incomplete.
 
 #undef BUILTIN

clang/lib/CodeGen/CGBuiltin.cpp

@@ -11233,6 +11233,28 @@ Value *CodeGenFunction::EmitPPCBuiltinExpr(unsigned BuiltinID,
     auto RetTy = ConvertType(BIRetType);
     return Builder.CreateBitCast(ShuffleCall, RetTy);
   }
+
+  case PPC::BI__builtin_pack_vector_int128: {
+    bool isLittleEndian = getTarget().isLittleEndian();
+    Value *UndefValue =
+        llvm::UndefValue::get(llvm::VectorType::get(Ops[0]->getType(), 2));
+    Value *Res = Builder.CreateInsertElement(
+        UndefValue, Ops[0], (uint64_t)(isLittleEndian ? 1 : 0));
+    Res = Builder.CreateInsertElement(Res, Ops[1],
+                                      (uint64_t)(isLittleEndian ? 0 : 1));
+    return Builder.CreateBitCast(Res, ConvertType(E->getType()));
+  }
+
+  case PPC::BI__builtin_unpack_vector_int128: {
+    ConstantInt *Index = cast<ConstantInt>(Ops[1]);
+    Value *Unpacked = Builder.CreateBitCast(
+        Ops[0], llvm::VectorType::get(ConvertType(E->getType()), 2));
+
+    if (getTarget().isLittleEndian())
+      Index = ConstantInt::get(Index->getType(), 1 - Index->getZExtValue());
+
+    return Builder.CreateExtractElement(Unpacked, Index);
+  }
   }
 }
 

clang/lib/Sema/SemaChecking.cpp

@@ -2970,6 +2970,13 @@ bool Sema::CheckPPCBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
     return Diag(TheCall->getBeginLoc(), diag::err_ppc_builtin_only_on_pwr7)
            << TheCall->getSourceRange();
 
+  auto SemaVSXCheck = [&](CallExpr *TheCall) -> bool {
+    if (!Context.getTargetInfo().hasFeature("vsx"))
+      return Diag(TheCall->getBeginLoc(), diag::err_ppc_builtin_only_on_pwr7)
+             << TheCall->getSourceRange();
+    return false;
+  };
+
   switch (BuiltinID) {
   default: return false;
   case PPC::BI__builtin_altivec_crypto_vshasigmaw:
@@ -2988,6 +2995,11 @@ bool Sema::CheckPPCBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
   case PPC::BI__builtin_vsx_xxpermdi:
   case PPC::BI__builtin_vsx_xxsldwi:
     return SemaBuiltinVSX(TheCall);
+  case PPC::BI__builtin_unpack_vector_int128:
+    return SemaVSXCheck(TheCall) ||
+           SemaBuiltinConstantArgRange(TheCall, 1, 0, 1);
+  case PPC::BI__builtin_pack_vector_int128:
+    return SemaVSXCheck(TheCall);
   }
   return SemaBuiltinConstantArgRange(TheCall, i, l, u);
 }

clang/test/CodeGen/builtins-ppc-error.c

@@ -14,6 +14,7 @@ extern vector signed int vsi;
 extern vector signed int vui;
 extern vector float vf;
 extern vector unsigned char vuc;
+extern vector signed __int128 vsllli;
 
 void testInsertWord(void) {
   int index = 5;
@@ -67,3 +68,8 @@ void testCTU(int index) {
 void testVCTUXS(int index) {
   vec_vctuxs(vf, index); //expected-error {{argument to '__builtin_altivec_vctuxs' must be a constant integer}}
 }
+
+void testUnpack128(int index) {
+  __builtin_unpack_vector_int128(vsllli, index); //expected-error {{argument to '__builtin_unpack_vector_int128' must be a constant integer}}
+  __builtin_unpack_vector_int128(vsllli, 5); //expected-error {{argument value 5 is outside the valid range [0, 1]}}
+}

clang/test/CodeGen/builtins-ppc-p7-disabled.c

@@ -6,6 +6,8 @@
 // RUN: not %clang_cc1 -triple powerpc-unknown-unknown -emit-llvm %s -o - 2>&1 \
 // RUN: -target-cpu pwr7 | FileCheck %s -check-prefix=CHECK-32
 
+vector signed __int128 vslll = {33};
+
 void call_p7_builtins(void)
 {
   int a = __builtin_divwe(33, 11);
@@ -13,6 +15,8 @@ void call_p7_builtins(void)
   unsigned long long d = __builtin_divde(33ULL, 11ULL);
   unsigned long long e = __builtin_divdeu(33ULL, 11ULL);
   unsigned long long f = __builtin_bpermd(33ULL, 11ULL);
+  __builtin_pack_vector_int128(33ULL, 11ULL);
+  __builtin_unpack_vector_int128(vslll, 1);
 }
 
 // CHECK: error: this builtin is only valid on POWER7 or later CPUs
@@ -25,6 +29,10 @@ void call_p7_builtins(void)
 // CHECK: __builtin_divdeu
 // CHECK: error: this builtin is only valid on POWER7 or later CPUs
 // CHECK: __builtin_bpermd
+// CHECK: error: this builtin is only valid on POWER7 or later CPUs
+// CHECK: __builtin_pack_vector_int128
+// CHECK: error: this builtin is only valid on POWER7 or later CPUs
+// CHECK: __builtin_unpack_vector_int128
 // CHECK-32: error: this builtin is only available on 64-bit targets
 // CHECK-32: __builtin_divde
 // CHECK-32: error: this builtin is only available on 64-bit targets

clang/test/CodeGen/builtins-ppc-vsx.c

@@ -49,6 +49,7 @@ vector unsigned int res_vui;
 vector bool long long res_vbll;
 vector signed long long res_vsll;
 vector unsigned long long res_vull;
+vector signed __int128 res_vslll;
 
 double res_d;
 float res_af[4];
@@ -1803,3 +1804,31 @@ vector double xxsldwi_should_not_assert(vector double a, vector double b) {
 // CHECK-NEXT-LE:  shufflevector <4 x i32> %{{[0-9]+}}, <4 x i32> %{{[0-9]+}}, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 // CHECK-NEXT-LE:  bitcast <4 x i32> %{{[0-9]+}} to <2 x double>
 }
+
+void testVectorInt128Pack(){
+// CHECK-LABEL: testVectorInt128Pack
+// CHECK-LABEL-LE: testVectorInt128Pack
+  res_vslll = __builtin_pack_vector_int128(aull[0], aull[1]);
+// CHECK: %[[V1:[0-9]+]] = insertelement <2 x i64> undef, i64 %{{[0-9]+}}, i64 0
+// CHECK-NEXT: %[[V2:[0-9]+]] = insertelement <2 x i64> %[[V1]], i64 %{{[0-9]+}}, i64 1
+// CHECK-NEXT:  bitcast <2 x i64> %[[V2]] to <1 x i128>
+
+// CHECK-LE: %[[V1:[0-9]+]] = insertelement <2 x i64> undef, i64 %{{[0-9]+}}, i64 1
+// CHECK-NEXT-LE: %[[V2:[0-9]+]] = insertelement <2 x i64> %[[V1]], i64 %{{[0-9]+}}, i64 0
+// CHECK-NEXT-LE:  bitcast <2 x i64> %[[V2]] to <1 x i128>
+
+  __builtin_unpack_vector_int128(res_vslll, 0);
+// CHECK:  %[[V1:[0-9]+]] = bitcast <1 x i128> %{{[0-9]+}} to <2 x i64>
+// CHECK-NEXT: %{{[0-9]+}} = extractelement <2 x i64> %[[V1]], i32 0
+
+// CHECK-LE:  %[[V1:[0-9]+]] = bitcast <1 x i128> %{{[0-9]+}} to <2 x i64>
+// CHECK-NEXT-LE: %{{[0-9]+}} = extractelement <2 x i64> %[[V1]], i32 1
+
+  __builtin_unpack_vector_int128(res_vslll, 1);
+// CHECK:  %[[V1:[0-9]+]] = bitcast <1 x i128> %{{[0-9]+}} to <2 x i64>
+// CHECK-NEXT: %{{[0-9]+}} = extractelement <2 x i64> %[[V1]], i32 1
+
+// CHECK-LE:  %[[V1:[0-9]+]] = bitcast <1 x i128> %{{[0-9]+}} to <2 x i64>
+// CHECK-NEXT-LE: %{{[0-9]+}} = extractelement <2 x i64> %[[V1]], i32 0
+
+}