[VA] SRC #012b - Then and Now: Root

[Albert Chan]

(11-10-2022 01:29 PM)C.Ret Wrote:  Concerning the PROOT instruction, I did some tests with about twenty values ​​for N ranging from 8 to 66. Each time, I observe that the root of minimal absolute value (of minimal norm) is store at the first position in the result vector containing the roots.

Not true. Roots obtained might not be sorted by abs.

Example, hard coded for N=8, last root abs is the minimum, not first.

>RUN
 1.81      .735640161749
>MAT DISP R
 (-.379096933597,-.630437913292)     ! abs = 0.73564016175
 (-.379096933597,.630437913292)
 (.125003135678,-.726137429683)      ! abs = 0.736818397379
 (.125003135678,.726137429683)
 (-.677447444085,-.29696080146)      ! abs = 0.739676116352
 (-.677447444085,.29696080146)
 (.518497763744,.521653714169)       ! abs = 0.735501548954
 (.518497763744,-.521653714169)