simdpp::rsqrt_rh

 

libsimdpp

Types

Capabilities

Operations

Conversions

Bitwise operations

Floating-point operations

Integer operations

Memory access operations

Shuffle operations

Miscellaneous operations

 

Floating-point operations

Elementary operations
add sub	mul div	fmadd fmsub	neg
Rounding
round ceil	floor trunc
Comparisons
cmp_eq cmp_neq	cmp_lt cmp_le	cmp_gt cmp_ge
Reduction
reduce_add reduce_min	reduce_mul reduce_max
Miscellaneous
abs sign	min max	isnan isnan2
Square root and reciprocal
sqrt	rcp_e rcp_rh	rsqrt_e rsqrt_rh

 

template<unsigned N, class E> Ret<N, _DETAIL_> rsqrt_rh( const Vec<N,E>& e, const Vec<N,E>& x );

Performs single Newton-Rhapson iteration improving the current estimate e of reciprocal square root of x. Effectively implements e * (3 - x*e*e) * 0.5.

The implementation behaves as if the following set of overloads is provided:

Ret	Vec
float32	float32
float64	float64

Parameters

e	-	current estimate
x	-	values to compute reciprocal for

Return value

A vector expression evaluating to e * (3 - x*e*e) * 0.5.