Re:An update on GNU performance
by kazinator on Monday October 22, 2018 @03:05PM
(#18277337)
The promotion rules only get worse when you use a type alias like int32_t, which could be a typedef for short, int, long or conceivably even char.
An expression of type int doesn't undergo any default promotion to anything, period; the widening promotion is only applied to the char and short types.
An int operand may convert to the type of an opposite operand in an expression, and an int argument or return value will convert to the parameter or return value type. That applies to int32_t also.
Anyway, you really have to know the rules to be working in C. Someone who uses fixed width types for everything doesn't know what they are doing and are just taking swipes at imaginary ghosts in the dark out of fear.
An expression of type int doesn't undergo any default promotion to anything, period; the widening promotion is only applied to the char and short types.
An int operand may convert to the type of an opposite operand in an expression, and an int argument or return value will convert to the parameter or return value type. That applies to int32_t also.
Anyway, you really have to know the rules to be working in C. Someone who uses fixed width types for everything doesn't know what they are doing and are just taking swipes at imaginary ghosts in the dark out of fear.