[libc-commits] [libc] [libc][math][c23] Add MPFR unit tests for {ceil, floor, round, roundeven, trunc}f16 (PR #94383)

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@@ -529,8 +543,14 @@ class MPFRNumber {
     // If the control reaches here, it means that this number and input are
     // of the same sign but different exponent. In such a case, ULP error is
     // calculated as sum of two parts.
-    thisAsT = std::abs(thisAsT);
-    input = std::abs(input);
+#ifdef LIBC_TYPES_HAS_FLOAT16
+    // TODO: This will no longer be needed once std::abs supports float16.
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overmighty wrote:

Right. I could also use `.abs()` instead of `.set_sign(Sign::POS)` then.

https://github.com/llvm/llvm-project/pull/94383