simdpp::mul_lo(integer)

 

libsimdpp

Types

Capabilities

Operations

Conversions

Bitwise operations

Floating-point operations

Integer operations

Memory access operations

Shuffle operations

Miscellaneous operations

 

Integer operations

Elementary operations
add add_sat	sub sub_sat	mul_lo mul_hi mull	neg
Comparisons
cmp_eq cmp_neq	cmp_lt cmp_gt	cmp_le cmp_ge
Reduction
reduce_add reduce_mul reduce_min reduce_max	reduce_and reduce_or reduce_popcnt
Miscellaneous
abs avg avg_trunc	min max	popcnt
shift_l(scalar) shift_l(vector)	shift_r(scalar) shift_r(vector)

 

template<unsigned N, class E1, class E2> Ret<N, _DETAIL_> mul_lo( Vec1<N,E1> a, Vec2<N,E2> b );

Multiplies two vectors with integer values and returns the lower part of the result. The implementation behaves as if the following set of overloads is provided:

Ret	Vec1	Vec2
int16	int16	int16
uint16	uint16	int16
uint16	int16	uint16
uint16	uint16	uint16
int32	int32	int32
uint32	uint32	int32
uint32	int32	uint32
uint32	uint32	uint32

The return type is a vector expression.

Scalar arguments

Several additional overloads are provided to implement implicit conversions from scalar types. Values of the following types are accepted as the first or the second argument: int32_t, int64_t, uint32_t, uint64_t. Each element of the expanded vector contains bitwise representation of the source value, with the highest bits discarded if the source data is too large.

The return type is a vector expression. The vector type is the same as the vector argument except that masks are unmasked to respective non-mask vector types.

Parameters

a, b

-

integer vectors

Return value

A vector expression evaluating to a * b.

Equivalent operation

r0 = a0 * b0
...
rN = aN * bN

See also

mul_hi	performs multiplication, returns higher half of the result (function template)
reduce_mul	computes the product of all elements in the vector (function template)
mull	performs multiplication, extends element width (function template)