Quick reference width names

We will be working with the same basic set of widths in a lot of contexts, where for historical reasons they might have different, even conflicting names. Here is a table to try to help keep track.

bits	8	16	32	64
bytes	1	2	4	8
Intel	byte	word	double word	quad word
register	al, ah, r8b	ax, r8w	eax, r8d	rax, r8
gdb	byte	halfword	word	giant word
C (LP64)	char	short	int, float	long, double, pointer
C (stdint.h)	int8_t	int16_t	int32_t	int64_t
Gnu assembly	.byte	.word	.long, .float	.quad, .double

Other useful library types:

• corresponding unsigned

• size_t

• ssize_t

• ptrdiff_t

• intptr_t, uintptr_t

• intmax_t, uintmax_t

See also limits.h.

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