openpower/isa/simplev.mdwn

   1 # setvl
   2
   3 SVL-Form
   4
   5 * setvl RT, RA, SVi, vs, ms
   6 * setvl. RT, RA, SVi, vs, ms
   7
   8 Pseudo-code:
   9
  10     VLimm <- SVi + 1
  11     if vs = 1 then
  12         if _RA != 0 then
  13             VL <- (RA|0)[57:63]
  14         else
  15             VL <- VLimm[1:7]
  16     else
  17         VL <- SVSTATE[7:13]
  18     if ms = 1 then
  19         MVL <- VLimm[1:7]
  20     else
  21         MVL <- SVSTATE[0:6]
  22     if VL > MVL then
  23         VL = MVL
  24     SVSTATE[0:6] <- MVL
  25     SVSTATE[7:13] <- VL
  26     RT <- [0]*57 || VL
  27
  28 Special Registers Altered:
  29
  30     CR0                     (if Rc=1)
  31