drm_fixed.h File Reference

#include <linux/math64.h>
#include <linux/types.h>
#include <linux/wordpart.h>

Include dependency graph for drm_fixed.h:

Go to the source code of this file.

Classes
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))
#define	DRM_FIXED_POINT   32
#define	DRM_FIXED_ONE   (1ULL << DRM_FIXED_POINT)
#define	DRM_FIXED_DECIMAL_MASK   (DRM_FIXED_ONE - 1)
#define	DRM_FIXED_DIGITS_MASK   (~DRM_FIXED_DECIMAL_MASK)
#define	DRM_FIXED_EPSILON   1LL
#define	DRM_FIXED_ALMOST_ONE   (DRM_FIXED_ONE - DRM_FIXED_EPSILON)
#define	FXP_Q4_FMT   "%d.%04d"
#define	FXP_Q4_ARGS(val_q4)   fxp_q4_to_int(val_q4), (fxp_q4_to_frac(val_q4) * 625)

Typedefs
typedef union dfixed	fixed20_12

Macro Definition Documentation

dfixed_const

#define dfixed_const

(

A

)

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

dfixed_const_666

#define dfixed_const_666

(

A

)

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

dfixed_const_8

#define dfixed_const_8

(

A

)

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

dfixed_const_half

#define dfixed_const_half

(

A

)

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

dfixed_frac

#define dfixed_frac

(

A

)

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

dfixed_init

#define dfixed_init

(

A

)

{ .full = dfixed_const((A)) }

dfixed_init_half

#define dfixed_init_half

(

A

)

{ .full = dfixed_const_half((A)) }

dfixed_mul

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

dfixed_trunc

#define dfixed_trunc

(

A

)

((A).full >> 12)

DRM_FIXED_ALMOST_ONE

#define DRM_FIXED_ALMOST_ONE   (DRM_FIXED_ONE - DRM_FIXED_EPSILON)

DRM_FIXED_DECIMAL_MASK

#define DRM_FIXED_DECIMAL_MASK   (DRM_FIXED_ONE - 1)

DRM_FIXED_DIGITS_MASK

#define DRM_FIXED_DIGITS_MASK   (~DRM_FIXED_DECIMAL_MASK)

DRM_FIXED_EPSILON

#define DRM_FIXED_EPSILON   1LL

DRM_FIXED_ONE

#define DRM_FIXED_ONE   (1ULL << DRM_FIXED_POINT)

DRM_FIXED_POINT

#define DRM_FIXED_POINT   32

FXP_Q4_ARGS

#define FXP_Q4_ARGS

(

val_q4

)

fxp_q4_to_int(val_q4), (fxp_q4_to_frac(val_q4) * 625)

FXP_Q4_FMT

#define FXP_Q4_FMT   "%d.%04d"

Typedef Documentation

fixed20_12

typedef union dfixed fixed20_12