fmadd.h File Reference

fmadd function; returns the result of a multiplication followed by an addition of all the elements of 3 input pack operandes More...

#include <IPSDKUtil/IPSDKUtilExports.h>
#include <IPSDKUtil/InstructionSet/Arithmetic/detail/FmaddPack.h>
#include <IPSDKUtil/InstructionSet/PromotedType.h>
#include <IPSDKUtil/Tools/ForceInline.h>

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Namespaces
	ipsdk
	Main namespace for IPSDK library.
	ipsdk::simd
	Namespace agregating IPSDK SIMD routines and classes.

Functions
template<eInstructionSet::domain instructionSet, class PackT >
IPSDK_FORCEINLINE PackT	ipsdk::simd::fmadd (const PackT &in1, const PackT &in2, const PackT &in3)
template<eInstructionSet::domain instructionSet, class PackT >
IPSDK_FORCEINLINE void	ipsdk::simd::fmadd (const PackT &in1, const PackT &in2, const PackT &in3, PackT &out)

Detailed Description

fmadd function; returns the result of a multiplication followed by an addition of all the elements of 3 input pack operandes

Author

H. Delestre

Date

2014/02/24

Copyright

2014 Reactiv'IP, all right reserved.

given 3 packs A, B and C with A = {a1, ..., an}, B = {b1, ..., bn} and C = {c1, ..., cn}, fmadd(A, B, C) returns D, with D ={ a1*b1+b1, ..., an*bn+cn}

Note

fmadd is a real fused multiply-add operation (with only one rounding) only if instructionSet equals to FMA3 or Standard; in other cases, fmadd corresponds to a multiplication followed by an addition, with 2 roundings, so results may slightly differ