[compiler-rt] [llvm] Add missing extendhfxf2 in compiler rt (PR #109090)

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:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff 09cd5a86733a362f12542a11ffd834cac885eb32 fb2e1e0f3438d0b8a64b3db8756e1e1db11cf9ab --extensions c -- compiler-rt/lib/builtins/extendhfxf2.c compiler-rt/test/builtins/Unit/extendhfxf2_test.c
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View the diff from clang-format here.
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``````````diff
diff --git a/compiler-rt/lib/builtins/extendhfxf2.c b/compiler-rt/lib/builtins/extendhfxf2.c
index ce70c0eaf8..2bd7c3b7c7 100644
--- a/compiler-rt/lib/builtins/extendhfxf2.c
+++ b/compiler-rt/lib/builtins/extendhfxf2.c
@@ -1,4 +1,5 @@
-//===-- lib/extendhfxf2.c - half -> long double conversion -------------*- C -*-===//
+//===-- lib/extendhfxf2.c - half -> long double conversion -------------*- C
+//-*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
diff --git a/compiler-rt/test/builtins/Unit/extendhfxf2_test.c b/compiler-rt/test/builtins/Unit/extendhfxf2_test.c
index 721878c850..567b70a671 100644
--- a/compiler-rt/test/builtins/Unit/extendhfxf2_test.c
+++ b/compiler-rt/test/builtins/Unit/extendhfxf2_test.c
@@ -1,57 +1,60 @@
 // RUN: %clang_builtins %s %librt -o %t && %run %t
 // REQUIRES: librt_has_extendhfxf2
 
-#include <stdio.h>
-#include <math.h> // for isnan, isinf
 #include <limits.h>
+#include <math.h> // for isnan, isinf
+#include <stdio.h>
 
 long double __extendhfxf2(_Float16 f);
 
-int test_extendhfxf2(_Float16 a, long double expected)
-{
-    long double x = __extendhfxf2(a);
-    int ret = !(x == expected || (isnan(x) && isnan(expected)) || (isinf(x) && isinf(expected) && x == expected));
-    if (ret){
-        printf("error in test__extendhfsf2(%f) = %.20Lf, "
-               "expected %.20Lf\n", a, x, expected);
-    }
-    return ret;
+int test_extendhfxf2(_Float16 a, long double expected) {
+  long double x = __extendhfxf2(a);
+  int ret = !(x == expected || (isnan(x) && isnan(expected)) ||
+              (isinf(x) && isinf(expected) && x == expected));
+  if (ret) {
+    printf("error in test__extendhfsf2(%f) = %.20Lf, "
+           "expected %.20Lf\n",
+           a, x, expected);
+  }
+  return ret;
 }
 
 char assumption_1[sizeof(_Float16) * CHAR_BIT == 16] = {0};
 
 int main() {
-    // Small positive value
-    if (test_extendhfxf2(0.09997558593750000000f, 0.09997558593750000000f))
-        return 1;
+  // Small positive value
+  if (test_extendhfxf2(0.09997558593750000000f, 0.09997558593750000000f))
+    return 1;
 
-    // Small negative value
-    if (test_extendhfxf2(-0.09997558593750000000f, -0.09997558593750000000f))
-        return 1;
+  // Small negative value
+  if (test_extendhfxf2(-0.09997558593750000000f, -0.09997558593750000000f))
+    return 1;
 
-    // Zero
-    if (test_extendhfxf2(0.0f, 0.0L))
-        return 1;
+  // Zero
+  if (test_extendhfxf2(0.0f, 0.0L))
+    return 1;
 
-    // Smallest positive non-zero value
-    if (test_extendhfxf2(0x1p-16f, 0x1p-16f))
-        return 1;
+  // Smallest positive non-zero value
+  if (test_extendhfxf2(0x1p-16f, 0x1p-16f))
+    return 1;
 
-    // Smallest negative non-zero value
-    if (test_extendhfxf2(-0x1p-16f, -0x1p-16f))
-        return 1;
+  // Smallest negative non-zero value
+  if (test_extendhfxf2(-0x1p-16f, -0x1p-16f))
+    return 1;
 
-    // Positive infinity
-    if (test_extendhfxf2(__builtin_huge_valf16(), __builtin_huge_valf64x()))
-        return 1;
+  // Positive infinity
+  if (test_extendhfxf2(__builtin_huge_valf16(), __builtin_huge_valf64x()))
+    return 1;
 
-    // Negative infinity
-    if (test_extendhfxf2(-__builtin_huge_valf16(), (long double)-__builtin_huge_valf64x()))
-        return 1;
+  // Negative infinity
+  if (test_extendhfxf2(-__builtin_huge_valf16(),
+                       (long double)-__builtin_huge_valf64x()))
+    return 1;
 
-    // NaN
-    if (test_extendhfxf2(__builtin_nanf16(""), (long double)__builtin_nanf64x("")))
-        return 1;
+  // NaN
+  if (test_extendhfxf2(__builtin_nanf16(""),
+                       (long double)__builtin_nanf64x("")))
+    return 1;
 
-    return 0;
+  return 0;
 }

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https://github.com/llvm/llvm-project/pull/109090