[cfe-commits] r104118 - in /cfe/trunk: lib/CodeGen/CGBuiltin.cpp test/CodeGen/builtins.c
Benjamin Kramer
benny.kra at googlemail.com
Wed May 19 04:24:26 PDT 2010
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
}
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