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Commit 6ea593c0 authored by Kumar, Mahesh's avatar Kumar, Mahesh Committed by Maarten Lankhorst
Browse files

drm/i915: Addition wrapper for fixed16.16 operation 



This patch introduce addition wrapper for fixed point 16.16 operations.
Which will be used by later patches to avoid direct member variables
access of fixed_16_16_t structure.

add_fixed16 : takes 2 fixed_16_16_t variable & returns fixed_16_16_t
add_fixed16_u32 : takes fixed_16_16_t & u32 variable & returns fixed_16_16_t

Signed-off-by: default avatarMahesh Kumar <mahesh1.kumar@intel.com>
Reviewed-by: default avatarMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: default avatarMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170705143154.32132-5-mahesh1.kumar@intel.com
parent eac2cb81

drivers/gpu/drm/i915/i915_drv.h

+19 −0
Original line number Diff line number Diff line
@@ -224,6 +224,25 @@ static inline uint_fixed_16_16_t mul_u32_fixed16(uint32_t val, 
	return clamp_u64_to_fixed16(intermediate_val);

}



static inline uint_fixed_16_16_t add_fixed16(uint_fixed_16_16_t add1,

					     uint_fixed_16_16_t add2)

{

	uint64_t interm_sum;



	interm_sum = (uint64_t) add1.val + add2.val;

	return clamp_u64_to_fixed16(interm_sum);

}



static inline uint_fixed_16_16_t add_fixed16_u32(uint_fixed_16_16_t add1,

						 uint32_t add2)

{

	uint64_t interm_sum;

	uint_fixed_16_16_t interm_add2 = u32_to_fixed16(add2);



	interm_sum = (uint64_t) add1.val + interm_add2.val;

	return clamp_u64_to_fixed16(interm_sum);

}



static inline const char *yesno(bool v)

{

	return v ? "yes" : "no";