more fixes

Author: SchrodingerZhu

libc/src/__support/FPUtil/except_value_utils.h

@@ -81,15 +81,21 @@ template <typename T, size_t N> struct ExceptValues {
         StorageType out_bits = values[i].rnd_towardzero_result;
         switch (fputil::quick_get_round()) {
         case FE_UPWARD:
-          out_bits += sign ? values[i].rnd_downward_offset
-                           : values[i].rnd_upward_offset;
+          out_bits += sign ? static_cast<decltype(out_bits)>(
+                                 values[i].rnd_downward_offset)
+                           : static_cast<decltype(out_bits)>(
+                                 values[i].rnd_upward_offset);
           break;
         case FE_DOWNWARD:
-          out_bits += sign ? values[i].rnd_upward_offset
-                           : values[i].rnd_downward_offset;
+          out_bits +=
+              sign
+                  ? static_cast<decltype(out_bits)>(values[i].rnd_upward_offset)
+                  : static_cast<decltype(out_bits)>(
+                        values[i].rnd_downward_offset);
           break;
         case FE_TONEAREST:
-          out_bits += values[i].rnd_tonearest_offset;
+          out_bits +=
+              static_cast<decltype(out_bits)>(values[i].rnd_tonearest_offset);
           break;
         }
         T result = FPBits<T>(out_bits).get_val();