drm_fixed.h File Reference

Go to the source code of this file.

Data Structures
union	dfixed

Macros
#define	dfixed_const(A)   (u32)(((A) << 12))/* + ((B + 0.000122)*4096)) */
#define	dfixed_const_half(A)   (u32)(((A) << 12) + 2048)
#define	dfixed_const_666(A)   (u32)(((A) << 12) + 2731)
#define	dfixed_const_8(A)   (u32)(((A) << 12) + 3277)
#define	dfixed_mul(A, B)   ((u64)((u64)(A).full * (B).full + 2048) >> 12)
#define	dfixed_init(A)   { .full = dfixed_const((A)) }
#define	dfixed_init_half(A)   { .full = dfixed_const_half((A)) }
#define	dfixed_trunc(A)   ((A).full >> 12)
#define	dfixed_frac(A)   ((A).full & ((1 << 12) - 1))

Typedefs
typedef union dfixed	fixed20_12

Macro Definition Documentation

#define dfixed_const

(

A

)

(u32)(((A) << 12))/* + ((B + 0.000122)*4096)) */

Definition at line 32 of file drm_fixed.h.

#define dfixed_const_666

(

A

)

(u32)(((A) << 12) + 2731)

Definition at line 34 of file drm_fixed.h.

#define dfixed_const_8

(

A

)

(u32)(((A) << 12) + 3277)

Definition at line 35 of file drm_fixed.h.

#define dfixed_const_half

(

A

)

(u32)(((A) << 12) + 2048)

Definition at line 33 of file drm_fixed.h.

#define dfixed_frac

(

A

)

((A).full & ((1 << 12) - 1))

Definition at line 40 of file drm_fixed.h.

#define dfixed_init

(

A

)

{ .full = dfixed_const((A)) }

Definition at line 37 of file drm_fixed.h.

#define dfixed_init_half

(

A

)

{ .full = dfixed_const_half((A)) }

Definition at line 38 of file drm_fixed.h.

#define dfixed_mul	(		A,
			B
	)		((u64)((u64)(A).full * (B).full + 2048) >> 12)

Definition at line 36 of file drm_fixed.h.

#define dfixed_trunc

(

A

)

((A).full >> 12)

Definition at line 39 of file drm_fixed.h.

Typedef Documentation

typedef union dfixed fixed20_12