From: Nate Begeman <natebegeman@mac.com>
Date: Tue, 3 Aug 2010 21:32:34 +0000 (+0000)
Subject: Add support for VFP status & control operations for ARM.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=99c40bb13b523d58d7aeb6446e4f486d6918ca58;p=clang

Add support for VFP status & control operations for ARM.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110153 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Basic/BuiltinsARM.def b/include/clang/Basic/BuiltinsARM.def
index 9da073d6fa..080d17fa1e 100644
--- a/include/clang/Basic/BuiltinsARM.def
+++ b/include/clang/Basic/BuiltinsARM.def
@@ -24,6 +24,12 @@ BUILTIN(__builtin_arm_qsub, "iii", "nc")
 BUILTIN(__builtin_arm_ssat, "iiUi", "nc")
 BUILTIN(__builtin_arm_usat, "UiUiUi", "nc")
 
+// VFP
+BUILTIN(__builtin_arm_get_fpscr, "Ui", "nc")
+BUILTIN(__builtin_arm_set_fpscr, "vUi", "nc")
+BUILTIN(__builtin_arm_vcvtr_f, "ffi", "nc")
+BUILTIN(__builtin_arm_vcvtr_d, "fdi", "nc")
+
 // NEON
 #define GET_NEON_BUILTINS
 #include "clang/Basic/arm_neon.inc"
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 7a14033b0e..666be7421f 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -1061,9 +1061,6 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID,
                                a, b);
   }
 
-  // Determine the type of this overloaded NEON intrinsic.
-  assert(BuiltinID > ARM::BI__builtin_arm_usat);
-
   llvm::SmallVector<Value*, 4> Ops;
   for (unsigned i = 0, e = E->getNumArgs() - 1; i != e; i++)
     Ops.push_back(EmitScalarExpr(E->getArg(i)));
@@ -1073,6 +1070,25 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID,
   if (!Arg->isIntegerConstantExpr(Result, getContext()))
     return 0;
 
+  if (BuiltinID == ARM::BI__builtin_arm_vcvtr_f ||
+      BuiltinID == ARM::BI__builtin_arm_vcvtr_d) {
+    // Determine the overloaded type of this builtin.
+    const llvm::Type *Ty;
+    if (BuiltinID == ARM::BI__builtin_arm_vcvtr_f)
+      Ty = llvm::Type::getFloatTy(VMContext);
+    else
+      Ty = llvm::Type::getDoubleTy(VMContext);
+    
+    // Determine whether this is an unsigned conversion or not.
+    bool usgn = Result.getZExtValue() == 1;
+    unsigned Int = usgn ? Intrinsic::arm_vcvtru : Intrinsic::arm_vcvtr;
+
+    // Call the appropriate intrinsic.
+    Function *F = CGM.getIntrinsic(Int, &Ty, 1);
+    return Builder.CreateCall(F, Ops.begin(), Ops.end(), "vcvtr");
+  }
+  
+  // Determine the type of this overloaded NEON intrinsic.
   unsigned type = Result.getZExtValue();
   bool usgn = type & 0x08;
   bool quad = type & 0x10;
diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index d032b3fe01..d17ea43984 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -300,6 +300,8 @@ bool Sema::CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
   default: return false;
   case ARM::BI__builtin_arm_ssat: i = 1; l = 1; u = 31; break;
   case ARM::BI__builtin_arm_usat: i = 1; u = 31; break;
+  case ARM::BI__builtin_arm_vcvtr_f:
+  case ARM::BI__builtin_arm_vcvtr_d: i = 1; u = 1; break;
 #define GET_NEON_IMMEDIATE_CHECK
 #include "clang/Basic/arm_neon.inc"
 #undef GET_NEON_IMMEDIATE_CHECK
@@ -316,6 +318,7 @@ bool Sema::CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
       << llvm::utostr(l) << llvm::utostr(u+l)  
       << TheCall->getArg(i)->getSourceRange();
 
+  // FIXME: VFP Intrinsics should error if VFP not present.
   return false;
 }