[PATCH][risc-v] libstdc++: Preserve signbit of nan when converting float to double [PR113578]

[Jeff Law]

On 5/7/24 9:36 AM, Andreas Schwab wrote:
> On Mai 07 2024, Jonathan Wakely wrote:
> 
>> +#ifdef __riscv
>> +	return _M_insert(__builtin_copysign((double)__f,
>> +					    (double)-__builtin_signbit(__f));
> 
> Should this use static_cast<double>?
And it's missing a close paren.

jeff