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authorBenjamin Kramer <benny.kra@googlemail.com>2010-05-19 11:24:26 +0000
committerBenjamin Kramer <benny.kra@googlemail.com>2010-05-19 11:24:26 +0000
commit6349ce94d1b4fa560bf060c5ca5ad5728ce4fad9 (patch)
treedc449af225bb12ee86f20c93ee0be9dbf476abbd
parentc3f984fa13364520f4a2c447d1d213db77db3309 (diff)
Implement codegen for __builtin_isnormal.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104118 91177308-0d34-0410-b5e6-96231b3b80d8
-rw-r--r--lib/CodeGen/CGBuiltin.cpp24
-rw-r--r--test/CodeGen/builtins.c8
2 files changed, 27 insertions, 5 deletions
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 4bd1b5d6ec..dd505c2ae8 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -364,11 +364,25 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
// 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));
diff --git a/test/CodeGen/builtins.c b/test/CodeGen/builtins.c
index b6a4a68ea4..8b6125806e 100644
--- a/test/CodeGen/builtins.c
+++ b/test/CodeGen/builtins.c
@@ -185,5 +185,13 @@ void test_float_builtins(float F, double D, long double LD) {
// 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
}