[libc][math][c23] Fix RoundToIntegerTest.h

Author: overmighty

libc/test/src/math/RoundToIntegerTest.h

@@ -137,10 +137,13 @@ class RoundToIntegerTestTemplate
       return;
 
     constexpr int EXPONENT_LIMIT = sizeof(I) * 8 - 1;
+    constexpr int BIASED_EXPONENT_LIMIT = EXPONENT_LIMIT + FPBits::EXP_BIAS;
+    if (BIASED_EXPONENT_LIMIT > FPBits::MAX_BIASED_EXPONENT)
+      return;
     // We start with 1.0 so that the implicit bit for x86 long doubles
     // is set.
     FPBits bits(F(1.0));
-    bits.set_biased_exponent(EXPONENT_LIMIT + FPBits::EXP_BIAS);
+    bits.set_biased_exponent(BIASED_EXPONENT_LIMIT);
     bits.set_sign(Sign::NEG);
     bits.set_mantissa(0);
 
@@ -201,10 +204,13 @@ class RoundToIntegerTestTemplate
       return;
 
     constexpr int EXPONENT_LIMIT = sizeof(I) * 8 - 1;
+    constexpr int BIASED_EXPONENT_LIMIT = EXPONENT_LIMIT + FPBits::EXP_BIAS;
+    if (BIASED_EXPONENT_LIMIT > FPBits::MAX_BIASED_EXPONENT)
+      return;
     // We start with 1.0 so that the implicit bit for x86 long doubles
     // is set.
     FPBits bits(F(1.0));
-    bits.set_biased_exponent(EXPONENT_LIMIT + FPBits::EXP_BIAS);
+    bits.set_biased_exponent(BIASED_EXPONENT_LIMIT);
     bits.set_sign(Sign::NEG);
     bits.set_mantissa(FPBits::FRACTION_MASK);
 

libc/utils/MPFRWrapper/MPFRUtils.cpp

@@ -1085,6 +1085,9 @@ template <typename T> bool round_to_long(T x, long &result) {
 template bool round_to_long<float>(float, long &);
 template bool round_to_long<double>(double, long &);
 template bool round_to_long<long double>(long double, long &);
+#ifdef LIBC_TYPES_HAS_FLOAT16
+template bool round_to_long<float16>(float16, long &);
+#endif
 
 template <typename T> bool round_to_long(T x, RoundingMode mode, long &result) {
   MPFRNumber mpfr(x);
@@ -1094,6 +1097,9 @@ template <typename T> bool round_to_long(T x, RoundingMode mode, long &result) {
 template bool round_to_long<float>(float, RoundingMode, long &);
 template bool round_to_long<double>(double, RoundingMode, long &);
 template bool round_to_long<long double>(long double, RoundingMode, long &);
+#ifdef LIBC_TYPES_HAS_FLOAT16
+template bool round_to_long<float16>(float16, RoundingMode, long &);
+#endif
 
 template <typename T> T round(T x, RoundingMode mode) {
   MPFRNumber mpfr(x);
@@ -1104,7 +1110,9 @@ template <typename T> T round(T x, RoundingMode mode) {
 template float round<float>(float, RoundingMode);
 template double round<double>(double, RoundingMode);
 template long double round<long double>(long double, RoundingMode);
+#ifdef LIBC_TYPES_HAS_FLOAT16
 template float16 round<float16>(float16, RoundingMode);
+#endif
 
 } // namespace mpfr
 } // namespace testing