Implement more support for fp-to-i128 and i128-to-fp conversions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48189 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 172 insertions, 80 deletions

diff --git a/include/llvm/CodeGen/RuntimeLibcalls.h b/include/llvm/CodeGen/RuntimeLibcalls.h
index 637c429..92a0b78 100644
--- a/include/llvm/CodeGen/RuntimeLibcalls.h
+++ b/include/llvm/CodeGen/RuntimeLibcalls.h
@@ -93,17 +93,25 @@ namespace RTLIB {
     FPROUND_F64_F32,
     FPTOSINT_F32_I32,
     FPTOSINT_F32_I64,
+    FPTOSINT_F32_I128,
     FPTOSINT_F64_I32,
     FPTOSINT_F64_I64,
+    FPTOSINT_F64_I128,
     FPTOSINT_F80_I64,
+    FPTOSINT_F80_I128,
     FPTOSINT_PPCF128_I64,
+    FPTOSINT_PPCF128_I128,
     FPTOUINT_F32_I32,
     FPTOUINT_F32_I64,
+    FPTOUINT_F32_I128,
     FPTOUINT_F64_I32,
     FPTOUINT_F64_I64,
+    FPTOUINT_F64_I128,
     FPTOUINT_F80_I32,
     FPTOUINT_F80_I64,
+    FPTOUINT_F80_I128,
     FPTOUINT_PPCF128_I64,
+    FPTOUINT_PPCF128_I128,
     SINTTOFP_I32_F32,
     SINTTOFP_I32_F64,
     SINTTOFP_I64_F32,
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 1ef19ff..3f09d62 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -3826,40 +3826,78 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
         }
         break;
       }
-      // Convert f32 / f64 to i32 / i64.
+      // Convert f32 / f64 to i32 / i64 / i128.
       RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
       switch (Node->getOpcode()) {
       case ISD::FP_TO_SINT: {
-        if (OVT == MVT::f32)
-          LC = (VT == MVT::i32)
-            ? RTLIB::FPTOSINT_F32_I32 : RTLIB::FPTOSINT_F32_I64;
-        else if (OVT == MVT::f64)
-          LC = (VT == MVT::i32)
-            ? RTLIB::FPTOSINT_F64_I32 : RTLIB::FPTOSINT_F64_I64;
-        else if (OVT == MVT::f80) {
-          assert(VT == MVT::i64);
-          LC = RTLIB::FPTOSINT_F80_I64;
-        }
-        else if (OVT == MVT::ppcf128) {
-          assert(VT == MVT::i64);
-          LC = RTLIB::FPTOSINT_PPCF128_I64;
+        if (VT == MVT::i32) {
+          if (OVT == MVT::f32)
+            LC = RTLIB::FPTOSINT_F32_I32;
+          else if (OVT == MVT::f64)
+            LC = RTLIB::FPTOSINT_F64_I32;
+          else
+            assert(0 && "Unexpected i32-to-fp conversion!");
+        } else if (VT == MVT::i64) {
+          if (OVT == MVT::f32)
+            LC = RTLIB::FPTOSINT_F32_I64;
+          else if (OVT == MVT::f64)
+            LC = RTLIB::FPTOSINT_F64_I64;
+          else if (OVT == MVT::f80)
+            LC = RTLIB::FPTOSINT_F80_I64;
+          else if (OVT == MVT::ppcf128)
+            LC = RTLIB::FPTOSINT_PPCF128_I64;
+          else
+            assert(0 && "Unexpected i64-to-fp conversion!");
+        } else if (VT == MVT::i128) {
+          if (OVT == MVT::f32)
+            LC = RTLIB::FPTOSINT_F32_I128;
+          else if (OVT == MVT::f64)
+            LC = RTLIB::FPTOSINT_F64_I128;
+          else if (OVT == MVT::f80)
+            LC = RTLIB::FPTOSINT_F80_I128;
+          else if (OVT == MVT::ppcf128)
+            LC = RTLIB::FPTOSINT_PPCF128_I128;
+          else
+            assert(0 && "Unexpected i128-to-fp conversion!");
+        } else {
+          assert(0 && "Unexpectd int-to-fp conversion!");
         }
         break;
       }
       case ISD::FP_TO_UINT: {
-        if (OVT == MVT::f32)
-          LC = (VT == MVT::i32)
-            ? RTLIB::FPTOUINT_F32_I32 : RTLIB::FPTOSINT_F32_I64;
-        else if (OVT == MVT::f64)
-          LC = (VT == MVT::i32)
-            ? RTLIB::FPTOUINT_F64_I32 : RTLIB::FPTOSINT_F64_I64;
-        else if (OVT == MVT::f80) {
-          LC = (VT == MVT::i32)
-            ? RTLIB::FPTOUINT_F80_I32 : RTLIB::FPTOUINT_F80_I64;
-        }
-        else if (OVT ==  MVT::ppcf128) {
-          assert(VT == MVT::i64);
-          LC = RTLIB::FPTOUINT_PPCF128_I64;
+        if (VT == MVT::i32) {
+          if (OVT == MVT::f32)
+            LC = RTLIB::FPTOUINT_F32_I32;
+          else if (OVT == MVT::f64)
+            LC = RTLIB::FPTOUINT_F64_I32;
+          else if (OVT == MVT::f80)
+            LC = RTLIB::FPTOUINT_F80_I32;
+          else
+            assert(0 && "Unexpected i32-to-fp conversion!");
+        } else if (VT == MVT::i64) {
+          if (OVT == MVT::f32)
+            LC = RTLIB::FPTOUINT_F32_I64;
+          else if (OVT == MVT::f64)
+            LC = RTLIB::FPTOUINT_F64_I64;
+          else if (OVT == MVT::f80)
+            LC = RTLIB::FPTOUINT_F80_I64;
+          else if (OVT == MVT::ppcf128)
+            LC = RTLIB::FPTOUINT_PPCF128_I64;
+          else
+            assert(0 && "Unexpected i64-to-fp conversion!");
+        } else if (VT == MVT::i128) {
+          if (OVT == MVT::f32)
+            LC = RTLIB::FPTOUINT_F32_I128;
+          else if (OVT == MVT::f64)
+            LC = RTLIB::FPTOUINT_F64_I128;
+          else if (OVT == MVT::f80)
+            LC = RTLIB::FPTOUINT_F80_I128;
+          else if (OVT == MVT::ppcf128)
+            LC = RTLIB::FPTOUINT_PPCF128_I128;
+          else
+            assert(0 && "Unexpected i128-to-fp conversion!");
+        } else {
+          assert(0 && "Unexpectd int-to-fp conversion!");
         }
         break;
       }
@@ -5428,9 +5466,12 @@ ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
   
   assert(TLI.getLibcallName(LC) && "Don't know how to expand this SINT_TO_FP!");
   Source = DAG.getNode(ISD::SINT_TO_FP, DestTy, Source);
-  SDOperand UnusedHiPart;
-  return ExpandLibCall(TLI.getLibcallName(LC), Source.Val, isSigned,
-                       UnusedHiPart);
+  SDOperand HiPart;
+  SDOperand Result = ExpandLibCall(TLI.getLibcallName(LC), Source.Val, isSigned,
+                                   HiPart);
+  if (Result.getValueType() != DestTy)
+    Result = DAG.getNode(ISD::BUILD_PAIR, DestTy, Result, HiPart);
+  return Result;
 }
 
 /// ExpandLegalINT_TO_FP - This function is responsible for legalizing a
@@ -6177,16 +6218,31 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
     }
 
     RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
-    if (Node->getOperand(0).getValueType() == MVT::f32)
-      LC = RTLIB::FPTOSINT_F32_I64;
-    else if (Node->getOperand(0).getValueType() == MVT::f64)
-      LC = RTLIB::FPTOSINT_F64_I64;
-    else if (Node->getOperand(0).getValueType() == MVT::f80)
-      LC = RTLIB::FPTOSINT_F80_I64;
-    else if (Node->getOperand(0).getValueType() == MVT::ppcf128)
-      LC = RTLIB::FPTOSINT_PPCF128_I64;
-    Lo = ExpandLibCall(TLI.getLibcallName(LC), Node,
-                       false/*sign irrelevant*/, Hi);
+    if (VT == MVT::i64) {
+      if (Node->getOperand(0).getValueType() == MVT::f32)
+        LC = RTLIB::FPTOSINT_F32_I64;
+      else if (Node->getOperand(0).getValueType() == MVT::f64)
+        LC = RTLIB::FPTOSINT_F64_I64;
+      else if (Node->getOperand(0).getValueType() == MVT::f80)
+        LC = RTLIB::FPTOSINT_F80_I64;
+      else if (Node->getOperand(0).getValueType() == MVT::ppcf128)
+        LC = RTLIB::FPTOSINT_PPCF128_I64;
+      Lo = ExpandLibCall(TLI.getLibcallName(LC), Node,
+                         false/*sign irrelevant*/, Hi);
+    } else if (VT == MVT::i128) {
+      if (Node->getOperand(0).getValueType() == MVT::f32)
+        LC = RTLIB::FPTOSINT_F32_I128;
+      else if (Node->getOperand(0).getValueType() == MVT::f64)
+        LC = RTLIB::FPTOSINT_F64_I128;
+      else if (Node->getOperand(0).getValueType() == MVT::f80)
+        LC = RTLIB::FPTOSINT_F80_I128;
+      else if (Node->getOperand(0).getValueType() == MVT::ppcf128)
+        LC = RTLIB::FPTOSINT_PPCF128_I128;
+      Lo = ExpandLibCall(TLI.getLibcallName(LC), Node,
+                         false/*sign irrelevant*/, Hi);
+    } else {
+      assert(0 && "Unexpected uint-to-fp conversion!");
+    }
     break;
   }
 
@@ -6209,16 +6265,31 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
     }
 
     RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
-    if (Node->getOperand(0).getValueType() == MVT::f32)
-      LC = RTLIB::FPTOUINT_F32_I64;
-    else if (Node->getOperand(0).getValueType() == MVT::f64)
-      LC = RTLIB::FPTOUINT_F64_I64;
-    else if (Node->getOperand(0).getValueType() == MVT::f80)
-      LC = RTLIB::FPTOUINT_F80_I64;
-    else if (Node->getOperand(0).getValueType() == MVT::ppcf128)
-      LC = RTLIB::FPTOUINT_PPCF128_I64;
-    Lo = ExpandLibCall(TLI.getLibcallName(LC), Node,
-                       false/*sign irrelevant*/, Hi);
+    if (VT == MVT::i64) {
+      if (Node->getOperand(0).getValueType() == MVT::f32)
+        LC = RTLIB::FPTOUINT_F32_I64;
+      else if (Node->getOperand(0).getValueType() == MVT::f64)
+        LC = RTLIB::FPTOUINT_F64_I64;
+      else if (Node->getOperand(0).getValueType() == MVT::f80)
+        LC = RTLIB::FPTOUINT_F80_I64;
+      else if (Node->getOperand(0).getValueType() == MVT::ppcf128)
+        LC = RTLIB::FPTOUINT_PPCF128_I64;
+      Lo = ExpandLibCall(TLI.getLibcallName(LC), Node,
+                         false/*sign irrelevant*/, Hi);
+    } else if (VT == MVT::i128) {
+      if (Node->getOperand(0).getValueType() == MVT::f32)
+        LC = RTLIB::FPTOUINT_F32_I128;
+      else if (Node->getOperand(0).getValueType() == MVT::f64)
+        LC = RTLIB::FPTOUINT_F64_I128;
+      else if (Node->getOperand(0).getValueType() == MVT::f80)
+        LC = RTLIB::FPTOUINT_F80_I128;
+      else if (Node->getOperand(0).getValueType() == MVT::ppcf128)
+        LC = RTLIB::FPTOUINT_PPCF128_I128;
+      Lo = ExpandLibCall(TLI.getLibcallName(LC), Node,
+                         false/*sign irrelevant*/, Hi);
+    } else {
+      assert(0 && "Unexpected uint-to-fp conversion!");
+    }
     break;
   }
 
@@ -6631,7 +6702,7 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
   case ISD::UINT_TO_FP: {
     bool isSigned = Node->getOpcode() == ISD::SINT_TO_FP;
     MVT::ValueType SrcVT = Node->getOperand(0).getValueType();
-    if (VT == MVT::ppcf128 && SrcVT != MVT::i64) {
+    if (VT == MVT::ppcf128 && SrcVT == MVT::i32) {
       static const uint64_t zero = 0;
       if (isSigned) {
         Hi = LegalizeOp(DAG.getNode(ISD::SINT_TO_FP, MVT::f64, 
@@ -6674,26 +6745,6 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
                Lo, Hi);
       break;
     }
-    RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
-    if (Node->getOperand(0).getValueType() == MVT::i64) {
-      if (VT == MVT::f32)
-        LC = isSigned ? RTLIB::SINTTOFP_I64_F32 : RTLIB::UINTTOFP_I64_F32;
-      else if (VT == MVT::f64)
-        LC = isSigned ? RTLIB::SINTTOFP_I64_F64 : RTLIB::UINTTOFP_I64_F64;
-      else if (VT == MVT::f80) {
-        assert(isSigned);
-        LC = RTLIB::SINTTOFP_I64_F80;
-      }
-      else if (VT == MVT::ppcf128) {
-        assert(isSigned);
-        LC = RTLIB::SINTTOFP_I64_PPCF128;
-      }
-    } else {
-      if (VT == MVT::f32)
-        LC = isSigned ? RTLIB::SINTTOFP_I32_F32 : RTLIB::UINTTOFP_I32_F32;
-      else
-        LC = isSigned ? RTLIB::SINTTOFP_I32_F64 : RTLIB::UINTTOFP_I32_F64;
-    }
 
     // Promote the operand if needed.
     if (getTypeAction(SrcVT) == Promote) {
@@ -6705,15 +6756,9 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
       Node = DAG.UpdateNodeOperands(Op, Tmp).Val;
     }
 
-    const char *LibCall = TLI.getLibcallName(LC);
-    if (LibCall)
-      Lo = ExpandLibCall(TLI.getLibcallName(LC), Node, isSigned, Hi);
-    else  {
-      Lo = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP, VT,
-                         Node->getOperand(0));
-      if (getTypeAction(Lo.getValueType()) == Expand)
-        ExpandOp(Lo, Lo, Hi);
-    }
+    Lo = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP, VT,
+                       Node->getOperand(0));
+    ExpandOp(Lo, Lo, Hi);
     break;
   }
   }
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 7900e97..90887a0 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -90,17 +90,25 @@ static void InitLibcallNames(const char **Names) {
   Names[RTLIB::FPROUND_F64_F32] = "__truncdfsf2";
   Names[RTLIB::FPTOSINT_F32_I32] = "__fixsfsi";
   Names[RTLIB::FPTOSINT_F32_I64] = "__fixsfdi";
+  Names[RTLIB::FPTOSINT_F32_I128] = "__fixsfti";
   Names[RTLIB::FPTOSINT_F64_I32] = "__fixdfsi";
   Names[RTLIB::FPTOSINT_F64_I64] = "__fixdfdi";
+  Names[RTLIB::FPTOSINT_F64_I128] = "__fixdfti";
   Names[RTLIB::FPTOSINT_F80_I64] = "__fixxfdi";
+  Names[RTLIB::FPTOSINT_F80_I128] = "__fixxfti";
   Names[RTLIB::FPTOSINT_PPCF128_I64] = "__fixtfdi";
+  Names[RTLIB::FPTOSINT_PPCF128_I128] = "__fixtfti";
   Names[RTLIB::FPTOUINT_F32_I32] = "__fixunssfsi";
   Names[RTLIB::FPTOUINT_F32_I64] = "__fixunssfdi";
+  Names[RTLIB::FPTOUINT_F32_I128] = "__fixunssfti";
   Names[RTLIB::FPTOUINT_F64_I32] = "__fixunsdfsi";
   Names[RTLIB::FPTOUINT_F64_I64] = "__fixunsdfdi";
+  Names[RTLIB::FPTOUINT_F64_I128] = "__fixunsdfti";
   Names[RTLIB::FPTOUINT_F80_I32] = "__fixunsxfsi";
   Names[RTLIB::FPTOUINT_F80_I64] = "__fixunsxfdi";
+  Names[RTLIB::FPTOUINT_F80_I128] = "__fixunsxfti";
   Names[RTLIB::FPTOUINT_PPCF128_I64] = "__fixunstfdi";
+  Names[RTLIB::FPTOUINT_PPCF128_I128] = "__fixunstfti";
   Names[RTLIB::SINTTOFP_I32_F32] = "__floatsisf";
   Names[RTLIB::SINTTOFP_I32_F64] = "__floatsidf";
   Names[RTLIB::SINTTOFP_I64_F32] = "__floatdisf";
diff --git a/test/CodeGen/PowerPC/int-fp-conv.ll b/test/CodeGen/PowerPC/int-fp-conv.ll
new file mode 100644
index 0000000..82a1826
--- /dev/null
+++ b/test/CodeGen/PowerPC/int-fp-conv.ll
@@ -0,0 +1,17 @@
+; RUN: llvm-as < %s | llc -march=ppc64 > %t
+; RUN: grep  __floattitf %t
+; RUN: grep  __fixunstfti %t
+
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128"
+target triple = "powerpc64-apple-darwin9.2.0"
+
+define ppc_fp128 @foo(i128 %a) nounwind  {
+entry:
+	%tmp2829 = uitofp i128 %a to ppc_fp128		; <i64> [#uses=1]
+	ret ppc_fp128 %tmp2829
+}
+define i128 @boo(ppc_fp128 %a) nounwind  {
+entry:
+	%tmp2829 = fptoui ppc_fp128 %a to i128		; <i64> [#uses=1]
+	ret i128 %tmp2829
+}
diff --git a/test/CodeGen/PowerPC/itofp128.ll b/test/CodeGen/PowerPC/itofp128.ll
new file mode 100644
index 0000000..91119e9
--- /dev/null
+++ b/test/CodeGen/PowerPC/itofp128.ll
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | llc -march=ppc64
+
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128"
+target triple = "powerpc64-apple-darwin9.2.0"
+
+define i128 @__fixunstfti(ppc_fp128 %a) nounwind  {
+entry:
+        %tmp1213 = uitofp i128 0 to ppc_fp128           ; <ppc_fp128> [#uses=1]
+        %tmp15 = sub ppc_fp128 %a, %tmp1213             ; <ppc_fp128> [#uses=1]
+        %tmp2829 = fptoui ppc_fp128 %tmp15 to i64               ; <i64> [#uses=1]
+        %tmp282930 = zext i64 %tmp2829 to i128          ; <i128> [#uses=1]
+        %tmp32 = add i128 %tmp282930, 0         ; <i128> [#uses=1]
+        ret i128 %tmp32
+}