[PATCH v2] newlib: fix build with <gcc-5 versions
Steven J Abner
Sun Mar 20 16:13:54 GMT 2022
I'm probably out of my depth, but along the same question:
Why 0 return and not ((bool)(((unsigned long long)(a) * (b)) >> 32))
or prepend with '!!'?
>On 20 Mar 2022 07:52, Eric Bresie wrote:
>> My C is a little rusty so forgive me up front if I’m not reading
something quite right…
>> Trying to understand the basic logic, the macro is expected to
return Boolean but the expression is assigning the multiplication
results to the size and then always returning 0 (false). Is that flow
correct? Should there be some form of “==“ involved and/or ever
return non-zero number?
>it returns a bool to indicate whether there was overflow, but the
result of the
actual multiplication of the first two operands is stored in the 3rd
>a return value of true means "the value overflowed", not "the
was successful". hence returning false is what the stub should do.
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