Vocabularymath.
vectorsInputs| v | a SIMD array |
| perm | an array of integers, or a byte-array |
OutputsWord descriptionPermutes the elements of a SIMD array. Duplicate entries are allowed in the permutation. The
perm argument can have one of two forms:
| • | A literal array of integers of the same length as the vector. This will perform a static, elementwise shuffle. |
| • | A byte array or SIMD vector of the same byte length as the vector. This will perform a variable bytewise shuffle. |
ExamplesUSING: alien.c-types math.vectors math.vectors.simd prettyprint ;
int-4{ 69 42 911 13 } { 1 3 2 3 } vshuffle .
int-4{ 42 13 911 13 }
USING: alien.c-types combinators math.vectors math.vectors.simd
namespaces prettyprint prettyprint.config ;
IN: scratchpad
: endian-swap ( size -- vector )
{
{ 1 [ uchar-16{ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 } ] }
{ 2 [ uchar-16{ 1 0 3 2 5 4 7 6 9 8 11 10 13 12 15 14 } ] }
{ 4 [ uchar-16{ 3 2 1 0 7 6 5 4 11 10 9 8 15 14 13 12 } ] }
} case ;
int-4{ 0x11223344 0x11223344 0x11223344 0x11223344 }
4 endian-swap vshuffle
16 number-base [ . ] with-variable
int-4{ 0x44332211 0x44332211 0x44332211 0x44332211 }
DefinitionMethods