openpower/isa/simplev.mdwn

   1 # setvl
   2
   3 SVL-Form
   4
   5 * setvl RT, RA, SVi, vs, ms
   6
   7 Pseudo-code:
   8
   9     VLimm <- SVi + 1
  10
  11     if vs = 1 then
  12         if RA = 0 then
  13             VL <- (RA)
  14         else
  15             VL <- VLimm
  16     else
  17         VL <- SVSTATE[7:13]
  18
  19     if ms = 1 then
  20         MVL <- VLimm
  21     else
  22         MVL <- SVSTATE[0:6]
  23
  24     if VL > MVL then
  25         VL = MVL
  26
  27     SVSTATE[0:6] = MVL
  28     SVSTATE[7:13] = VL
  29
  30     if RT != 0 then
  31         RT <- VL
  32
  33 Special Registers Altered:
  34
  35     CR0                     (if Rc=1)
  36