Alignment Macros

Helper macros for declaring aligned variables. More...

Macros
#define	DECLARE_ALIGNED(n, t, v)   t __attribute__ ((aligned (n))) v
	Declare a variable that is aligned in memory. More...
#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. More...

Detailed Description

Helper macros for declaring aligned variables.

Macro Definition Documentation

#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 104 of file mem.h.

Referenced by deblock_v8_luma_intra_8_mmi(), dering_altivec(), dering_TMPL(), doVertDefFilter_altivec(), doVertDefFilter_TMPL(), doVertLowPass_altivec(), ff_atrac3p_generate_tones(), ff_deblock_h_luma_8_mmi(), ff_deblock_h_luma_intra_8_mmi(), ff_put_vp8_bilinear16_hv_mmi(), ff_put_vp8_bilinear4_hv_mmi(), ff_put_vp8_bilinear8_hv_mmi(), ff_put_vp8_epel16_h4v4_mmi(), ff_put_vp8_epel16_h4v6_mmi(), ff_put_vp8_epel16_h6v4_mmi(), ff_put_vp8_epel16_h6v6_mmi(), ff_put_vp8_epel4_h4v4_mmi(), ff_put_vp8_epel4_h4v6_mmi(), ff_put_vp8_epel4_h6v4_mmi(), ff_put_vp8_epel4_h6v6_mmi(), ff_put_vp8_epel8_h4v4_mmi(), ff_put_vp8_epel8_h4v6_mmi(), ff_put_vp8_epel8_h6v4_mmi(), ff_put_vp8_epel8_h6v6_mmi(), ff_simple_idct_mmi(), ff_vp8_idct_add_mmi(), ff_yuv2rgb_init_tables_ppc(), filter(), postProcess_TMPL(), pred_pskip_motion(), and vertClassify_altivec().

#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 105 of file mem.h.