[cfe-commits] r104118 - in /cfe/trunk: lib/CodeGen/CGBuiltin.cpp test/CodeGen/builtins.c

[Benjamin Kramer]

Author: d0k
Date: Wed May 19 06:24:26 2010
New Revision: 104118

URL: http://llvm.org/viewvc/llvm-project?rev=104118&view=rev
Log:
Implement codegen for __builtin_isnormal.

Modified:
    cfe/trunk/lib/CodeGen/CGBuiltin.cpp
    cfe/trunk/test/CodeGen/builtins.c

Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=104118&r1=104117&r2=104118&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Wed May 19 06:24:26 2010
@@ -364,11 +364,25 @@
       
   // TODO: BI__builtin_isinf_sign
   //   isinf_sign(x) -> isinf(x) ? (signbit(x) ? -1 : 1) : 0
-  // TODO: BI__builtin_isnormal
-  //   isnormal(x) -> x != x && fabs(x) < infinity && fabsf(x) >= float_min
-  //   where floatmin is the minimum value for the fp type.  Not sure if this is
-  //   APFloat::getSmallest or getSmallestNormalized.
-      
+
+  case Builtin::BI__builtin_isnormal: {
+    // isnormal(x) --> x == x && fabsf(x) < infinity && fabsf(x) >= float_min
+    Value *V = EmitScalarExpr(E->getArg(0));
+    Value *Eq = Builder.CreateFCmpOEQ(V, V, "iseq");
+
+    Value *Abs = EmitFAbs(*this, V, E->getArg(0)->getType());
+    Value *IsLessThanInf =
+      Builder.CreateFCmpULT(Abs, ConstantFP::getInfinity(V->getType()),"isinf");
+    APFloat Smallest = APFloat::getSmallestNormalized(
+                   getContext().getFloatTypeSemantics(E->getArg(0)->getType()));
+    Value *IsNormal =
+      Builder.CreateFCmpUGE(Abs, ConstantFP::get(V->getContext(), Smallest),
+                            "isnormal");
+    V = Builder.CreateAnd(Eq, IsLessThanInf, "and");
+    V = Builder.CreateAnd(V, IsNormal, "and");
+    return RValue::get(Builder.CreateZExt(V, ConvertType(E->getType())));
+  }
+
   case Builtin::BI__builtin_isfinite: {
     // isfinite(x) --> x == x && fabs(x) != infinity; }
     Value *V = EmitScalarExpr(E->getArg(0));

Modified: cfe/trunk/test/CodeGen/builtins.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/builtins.c?rev=104118&r1=104117&r2=104118&view=diff
==============================================================================
--- cfe/trunk/test/CodeGen/builtins.c (original)
+++ cfe/trunk/test/CodeGen/builtins.c Wed May 19 06:24:26 2010
@@ -185,5 +185,13 @@
   // CHECK: call float @fabsf
   // CHECK: fcmp une float {{.*}}, 0x7FF0000000000000
   // CHECK: and i1 
+
+  res = __builtin_isnormal(F);
+  // CHECK: fcmp oeq float
+  // CHECK: call float @fabsf
+  // CHECK: fcmp ult float {{.*}}, 0x7FF0000000000000
+  // CHECK: fcmp uge float {{.*}}, 0x3810000000000000
+  // CHECK: and i1
+  // CHECK: and i1
 }