[clang] [llvm] [APFloat] Add APFloat support for FP6 data types (PR #94735)

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``````````bash
git-clang-format --diff ac404632f991fc6e7dc75ef553a99676ba8002ce 21432aeaeecc6ba06de252c460e5cb09abb68a29 -- clang/lib/AST/MicrosoftMangle.cpp llvm/include/llvm/ADT/APFloat.h llvm/lib/Support/APFloat.cpp llvm/unittests/ADT/APFloatTest.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Support/APFloat.cpp b/llvm/lib/Support/APFloat.cpp
index b8ca56d96e..04d54ee663 100644
--- a/llvm/lib/Support/APFloat.cpp
+++ b/llvm/lib/Support/APFloat.cpp
@@ -1531,7 +1531,7 @@ IEEEFloat::opStatus IEEEFloat::handleOverflow(roundingMode rounding_mode) {
         makeNaN(false, sign);
       else
         category = fcInfinity;
-      return (opStatus) (opOverflow | opInexact);
+      return (opStatus)(opOverflow | opInexact);
     }
   }
 
diff --git a/llvm/unittests/ADT/APFloatTest.cpp b/llvm/unittests/ADT/APFloatTest.cpp
index d80442b066..6b21afb52f 100644
--- a/llvm/unittests/ADT/APFloatTest.cpp
+++ b/llvm/unittests/ADT/APFloatTest.cpp
@@ -735,7 +735,6 @@ TEST(APFloatTest, IsSmallestNormalized) {
       EXPECT_FALSE(APFloat::getSNaN(Semantics).isSmallestNormalized());
     }
 
-
     EXPECT_FALSE(APFloat::getLargest(Semantics).isSmallestNormalized());
     EXPECT_FALSE(APFloat::getLargest(Semantics, true).isSmallestNormalized());
 
@@ -1830,8 +1829,7 @@ TEST(APFloatTest, getLargest) {
       30, APFloat::getLargest(APFloat::Float8E4M3B11FNUZ()).convertToDouble());
   EXPECT_EQ(3.40116213421e+38f,
             APFloat::getLargest(APFloat::FloatTF32()).convertToFloat());
-  EXPECT_EQ(28,
-            APFloat::getLargest(APFloat::Float6E3M2FN()).convertToDouble());
+  EXPECT_EQ(28, APFloat::getLargest(APFloat::Float6E3M2FN()).convertToDouble());
   EXPECT_EQ(7.5,
             APFloat::getLargest(APFloat::Float6E2M3FN()).convertToDouble());
 }
@@ -1906,7 +1904,6 @@ TEST(APFloatTest, getSmallest) {
   EXPECT_TRUE(test.isFiniteNonZero());
   EXPECT_TRUE(test.isDenormal());
   EXPECT_TRUE(test.bitwiseIsEqual(expected));
-
 }
 
 TEST(APFloatTest, getSmallestNormalized) {
@@ -2004,7 +2001,6 @@ TEST(APFloatTest, getSmallestNormalized) {
   EXPECT_FALSE(test.isDenormal());
   EXPECT_TRUE(test.bitwiseIsEqual(expected));
   EXPECT_TRUE(test.isSmallestNormalized());
-
 }
 
 TEST(APFloatTest, getZero) {
@@ -7025,8 +7021,7 @@ TEST(APFloatTest, Float6E3M2FNToDouble) {
       APFloat::getSmallestNormalized(APFloat::Float6E3M2FN(), true);
   EXPECT_EQ(-0x1p-2, NegSmallest.convertToDouble());
 
-  APFloat SmallestDenorm =
-      APFloat::getSmallest(APFloat::Float6E3M2FN(), false);
+  APFloat SmallestDenorm = APFloat::getSmallest(APFloat::Float6E3M2FN(), false);
   EXPECT_TRUE(SmallestDenorm.isDenormal());
   EXPECT_EQ(0x0.1p0, SmallestDenorm.convertToDouble());
 }
@@ -7047,8 +7042,7 @@ TEST(APFloatTest, Float6E2M3FNToDouble) {
       APFloat::getSmallestNormalized(APFloat::Float6E2M3FN(), true);
   EXPECT_EQ(-0x1p0, NegSmallest.convertToDouble());
 
-  APFloat SmallestDenorm =
-      APFloat::getSmallest(APFloat::Float6E2M3FN(), false);
+  APFloat SmallestDenorm = APFloat::getSmallest(APFloat::Float6E2M3FN(), false);
   EXPECT_TRUE(SmallestDenorm.isDenormal());
   EXPECT_EQ(0x0.2p0, SmallestDenorm.convertToDouble());
 }
@@ -7077,8 +7071,7 @@ TEST(APFloatTest, Float6E3M2FNToFloat) {
       APFloat::getSmallestNormalized(APFloat::Float6E3M2FN(), true);
   EXPECT_EQ(-0x1p-2, NegSmallest.convertToFloat());
 
-  APFloat SmallestDenorm =
-      APFloat::getSmallest(APFloat::Float6E3M2FN(), false);
+  APFloat SmallestDenorm = APFloat::getSmallest(APFloat::Float6E3M2FN(), false);
   EXPECT_TRUE(SmallestDenorm.isDenormal());
   EXPECT_EQ(0x0.1p0, SmallestDenorm.convertToFloat());
 }
@@ -7107,8 +7100,7 @@ TEST(APFloatTest, Float6E2M3FNToFloat) {
       APFloat::getSmallestNormalized(APFloat::Float6E2M3FN(), true);
   EXPECT_EQ(-0x1p0, NegSmallest.convertToFloat());
 
-  APFloat SmallestDenorm =
-      APFloat::getSmallest(APFloat::Float6E2M3FN(), false);
+  APFloat SmallestDenorm = APFloat::getSmallest(APFloat::Float6E2M3FN(), false);
   EXPECT_TRUE(SmallestDenorm.isDenormal());
   EXPECT_EQ(0x0.2p0, SmallestDenorm.convertToFloat());
 }

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https://github.com/llvm/llvm-project/pull/94735