|
|
|
|
|
|
by magicalhippo
1365 days ago
|
|
|
It's basically several moves for the price of one. Given that you operate on multiple values at once, being able to shuffle or duplicate values comes up all the time. For example if you're filtering four image lines at a time using a 1D filter kernel, you'll want to replicate the filter coefficient to each SIMD element, so that you can multiply each of the four pixel values with the same coefficient. Shuffle lets you replicate a single coefficient value into all the elements of a register in one instruction. |
|
|