Alignment Macros

Helper macros for declaring aligned variables. More...

Macros
#define	DECLARE_ALIGNED(n, t, v)   t __attribute__ ((aligned (n))) v
#define	DECLARE_ASM_ALIGNED(n, t, v)   t av_used __attribute__ ((aligned (n))) v
#define	DECLARE_ASM_CONST(n, t, v)   static const t av_used __attribute__ ((aligned (n))) v

Detailed Description

Helper macros for declaring aligned variables.

Macro Definition Documentation

DECLARE_ALIGNED

#define DECLARE_ALIGNED	(		n,
			t,
			v
	)		t __attribute__ ((aligned (n))) v

Declare a variable that is aligned in memory.

DECLARE_ALIGNED(16, uint16_t, aligned_int) = 42;
DECLARE_ALIGNED(32, uint8_t, aligned_array)[128];
 
// The default-alignment equivalent would be
uint16_t aligned_int = 42;
uint8_t aligned_array[128];

Parameters

n	Minimum alignment in bytes
t	Type of the variable (or array element)
v	Name of the variable

Definition at line 117 of file mem.h.

DECLARE_ASM_ALIGNED

#define DECLARE_ASM_ALIGNED	(		n,
			t,
			v
	)		t av_used __attribute__ ((aligned (n))) v

Declare an aligned variable appropriate for use in inline assembly code.

DECLARE_ASM_ALIGNED(16, uint64_t, pw_08) = UINT64_C(0x0008000800080008);

Parameters

n	Minimum alignment in bytes
t	Type of the variable (or array element)
v	Name of the variable

Definition at line 118 of file mem.h.

DECLARE_ASM_CONST

#define DECLARE_ASM_CONST	(		n,
			t,
			v
	)		static const t av_used __attribute__ ((aligned (n))) v

Declare a static constant aligned variable appropriate for use in inline assembly code.

DECLARE_ASM_CONST(16, uint64_t, pw_08) = UINT64_C(0x0008000800080008);

Parameters

n	Minimum alignment in bytes
t	Type of the variable (or array element)
v	Name of the variable

Definition at line 119 of file mem.h.