APInt::tcSet(significandParts(), 0, partCount());
}
+int llvm::ilogb(const APFloat &Arg) {
+ if (Arg.isNaN())
+ return APFloat::IEK_NaN;
+ if (Arg.isZero())
+ return APFloat::IEK_Zero;
+ if (Arg.isInfinity())
+ return APFloat::IEK_Inf;
+ if (!Arg.isDenormal())
+ return Arg.exponent;
+
+ APFloat Normalized(Arg);
+ int SignificandBits = Arg.getSemantics().precision - 1;
+
+ Normalized.exponent += SignificandBits;
+ Normalized.normalize(APFloat::rmNearestTiesToEven, lfExactlyZero);
+ return Normalized.exponent - SignificandBits;
+}
+
APFloat llvm::scalbn(APFloat X, int Exp, APFloat::roundingMode RoundingMode) {
auto MaxExp = X.getSemantics().maxExponent;
auto MinExp = X.getSemantics().minExponent;
}
TEST(APFloatTest, ilogb) {
+ EXPECT_EQ(-1074, ilogb(APFloat::getSmallest(APFloat::IEEEdouble, false)));
+ EXPECT_EQ(-1074, ilogb(APFloat::getSmallest(APFloat::IEEEdouble, true)));
+ EXPECT_EQ(-1023, ilogb(APFloat(APFloat::IEEEdouble, "0x1.ffffffffffffep-1024")));
+ EXPECT_EQ(-1023, ilogb(APFloat(APFloat::IEEEdouble, "0x1.ffffffffffffep-1023")));
+ EXPECT_EQ(-1023, ilogb(APFloat(APFloat::IEEEdouble, "-0x1.ffffffffffffep-1023")));
+ EXPECT_EQ(-51, ilogb(APFloat(APFloat::IEEEdouble, "0x1p-51")));
+ EXPECT_EQ(-1023, ilogb(APFloat(APFloat::IEEEdouble, "0x1.c60f120d9f87cp-1023")));
+ EXPECT_EQ(-2, ilogb(APFloat(APFloat::IEEEdouble, "0x0.ffffp-1")));
+ EXPECT_EQ(-1023, ilogb(APFloat(APFloat::IEEEdouble, "0x1.fffep-1023")));
+ EXPECT_EQ(1023, ilogb(APFloat::getLargest(APFloat::IEEEdouble, false)));
+ EXPECT_EQ(1023, ilogb(APFloat::getLargest(APFloat::IEEEdouble, true)));
+
+
EXPECT_EQ(0, ilogb(APFloat(APFloat::IEEEsingle, "0x1p+0")));
EXPECT_EQ(0, ilogb(APFloat(APFloat::IEEEsingle, "-0x1p+0")));
EXPECT_EQ(42, ilogb(APFloat(APFloat::IEEEsingle, "0x1p+42")));
EXPECT_EQ(127, ilogb(APFloat::getLargest(APFloat::IEEEsingle, false)));
EXPECT_EQ(127, ilogb(APFloat::getLargest(APFloat::IEEEsingle, true)));
- EXPECT_EQ(-126, ilogb(APFloat::getSmallest(APFloat::IEEEsingle, false)));
- EXPECT_EQ(-126, ilogb(APFloat::getSmallest(APFloat::IEEEsingle, true)));
+
+ EXPECT_EQ(-149, ilogb(APFloat::getSmallest(APFloat::IEEEsingle, false)));
+ EXPECT_EQ(-149, ilogb(APFloat::getSmallest(APFloat::IEEEsingle, true)));
EXPECT_EQ(-126,
ilogb(APFloat::getSmallestNormalized(APFloat::IEEEsingle, false)));
EXPECT_EQ(-126,