From 3d42bfbbdd26ac56ccd706d4ebee984490c72ecc Mon Sep 17 00:00:00 2001 From: Jeffrey Yasskin Date: Fri, 15 Jul 2011 07:04:56 +0000 Subject: Add an APFloat::convertToInt(APSInt) function that automatically manages the memory for the result. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135259 91177308-0d34-0410-b5e6-96231b3b80d8 --- unittests/ADT/APFloatTest.cpp | 49 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) (limited to 'unittests/ADT/APFloatTest.cpp') diff --git a/unittests/ADT/APFloatTest.cpp b/unittests/ADT/APFloatTest.cpp index 5f05b86169..08ac2a0525 100644 --- a/unittests/ADT/APFloatTest.cpp +++ b/unittests/ADT/APFloatTest.cpp @@ -12,6 +12,7 @@ #include "llvm/Support/raw_ostream.h" #include "gtest/gtest.h" #include "llvm/ADT/APFloat.h" +#include "llvm/ADT/APSInt.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/SmallVector.h" @@ -344,6 +345,54 @@ TEST(APFloatTest, toString) { ASSERT_EQ("8.731834E+2", convertToString(873.1834, 0, 0)); } +TEST(APFloatTest, toInteger) { + bool isExact = false; + APSInt result(5, /*isUnsigned=*/true); + + EXPECT_EQ(APFloat::opOK, + APFloat(APFloat::IEEEdouble, "10") + .convertToInteger(result, APFloat::rmTowardZero, &isExact)); + EXPECT_TRUE(isExact); + EXPECT_EQ(APSInt(APInt(5, 10), true), result); + + EXPECT_EQ(APFloat::opInvalidOp, + APFloat(APFloat::IEEEdouble, "-10") + .convertToInteger(result, APFloat::rmTowardZero, &isExact)); + EXPECT_FALSE(isExact); + EXPECT_EQ(APSInt::getMinValue(5, true), result); + + EXPECT_EQ(APFloat::opInvalidOp, + APFloat(APFloat::IEEEdouble, "32") + .convertToInteger(result, APFloat::rmTowardZero, &isExact)); + EXPECT_FALSE(isExact); + EXPECT_EQ(APSInt::getMaxValue(5, true), result); + + EXPECT_EQ(APFloat::opInexact, + APFloat(APFloat::IEEEdouble, "7.9") + .convertToInteger(result, APFloat::rmTowardZero, &isExact)); + EXPECT_FALSE(isExact); + EXPECT_EQ(APSInt(APInt(5, 7), true), result); + + result.setIsUnsigned(false); + EXPECT_EQ(APFloat::opOK, + APFloat(APFloat::IEEEdouble, "-10") + .convertToInteger(result, APFloat::rmTowardZero, &isExact)); + EXPECT_TRUE(isExact); + EXPECT_EQ(APSInt(APInt(5, -10, true), false), result); + + EXPECT_EQ(APFloat::opInvalidOp, + APFloat(APFloat::IEEEdouble, "-17") + .convertToInteger(result, APFloat::rmTowardZero, &isExact)); + EXPECT_FALSE(isExact); + EXPECT_EQ(APSInt::getMinValue(5, false), result); + + EXPECT_EQ(APFloat::opInvalidOp, + APFloat(APFloat::IEEEdouble, "16") + .convertToInteger(result, APFloat::rmTowardZero, &isExact)); + EXPECT_FALSE(isExact); + EXPECT_EQ(APSInt::getMaxValue(5, false), result); +} + static APInt nanbits(const fltSemantics &Sem, bool SNaN, bool Negative, uint64_t fill) { APInt apfill(64, fill); -- cgit v1.2.3-70-g09d2