Conversation
twinspin 
twinspin6@outerheaven.club
double word more like double quad word more like just tell me the fucking size
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@twinspin6 the only real types are u8,u16,u32,u64,i8,i16,i32,i64,f32,f64, everything else is a mental illness.
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@affine what does the i mean
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@twinspin6 It depends on the machine.
If you want specific sizes, you need to use stdint.h or check with sizeof().
If you want specific sizes, you need to use stdint.h or check with sizeof().
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@Suiseiseki it should always be the exact size in bits you want
not some bs machine specific stuff
not some bs machine specific stuff
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@affine and what does the u mean
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@twinspin6 Most machines cannot handle arbitrary bit sizes - as their registers are of a fixed size and registers are different depending on the machine.
You would need to use a packed struct or similar to handle arbitrary bit sizes and it is quite slow to have most operations needing to hit memory, rather than being able to use registers.
You would need to use a packed struct or similar to handle arbitrary bit sizes and it is quite slow to have most operations needing to hit memory, rather than being able to use registers.
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@affine so u8 = unsigned 8
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@Suiseiseki that's why stdint exists though right? to guarantee at least a specific size in bits so your program still works in the end
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@twinspin6 Yes, uint64_t is designed to ask for 64 bits no matter the machine - which works fine on machines with 64bit and 32bit registers.
Although, some machines have uint48_t, which is not portable.
Although, some machines have uint48_t, which is not portable.
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@Suiseiseki what happens when you use uint48_t on 32 bit register machines
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@twinspin6 It fails to compile on both 32bit and 64bit register machines.
Such is only really for microprocessors with odd register sizes.
Such is only really for microprocessors with odd register sizes.
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@twinspin6 For uint64_t on 32 bit register machines, GCC is smart enough to use 2 registers.
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