(vmerge-head) ( u v -- h )

Vocabulary

math.vectors

Inputs

u	a sequence
v	a sequence

Outputs

h	a sequence

Word description

Creates a new sequence of the same type and size as u and v by interleaving the elements from the first half of u and v.

Notes

For hardware-supported SIMD vector types this word compiles to a single instruction.

Examples

USING: kernel math.vectors prettyprint ; { "A" "B" "C" "D" } { "1" "2" "3" "4" } (vmerge-head) .
{ "A" "1" "B" "2" }

See also

vmerge, (vmerge), (vmerge-tail)

Definition

IN: math.vectors

GENERIC: (vmerge-head) ( u v -- h )

Methods

USING: accessors kernel math.vectors sequences.cords ;

M: cord (vmerge-head) [ head>> ] bi@ (vmerge) cord-append ;
    inline


USING: assocs kernel math math.vectors sequences ;

M: object (vmerge-head)
    over length 2 /i [ head-slice ] curry bi@ [ zip ] keep
    concat-as ; inline


USING: generic kernel math.vectors math.vectors.simd
math.vectors.simd.intrinsics math.vectors.simd.private ;

M: simd-128 (vmerge-head)
    dup simd-rep
    [ (simd-vmerge-head) ]
    [ M\ simd-128 (vmerge-head) (call-next-method) ] vv->v-op ;
    inline