    1. store_src_rg                   coords = src.rg
    2. init_lane_masks                CondMask = LoopMask = RetMask = true
    3. copy_constant                  x(0) = 0x3F800000 (1.0)
    4. copy_constant                  x(1) = 0x3F800000 (1.0)
    5. copy_constant                  x(2) = 0x3F800000 (1.0)
    6. copy_constant                  x(3) = 0x3F800000 (1.0)
    7. store_loop_mask                $0 = LoopMask
    8. jump                           jump +12 (#20)
    9. copy_slot_unmasked             $1 = x(0)
   10. copy_constant                  $2 = 0x3E800000 (0.25)
   11. sub_float                      $1 -= $2
   12. copy_slot_masked               x(0) = Mask($1)
   13. store_condition_mask           $1 = CondMask
   14. copy_slot_unmasked             $2 = x(0)
   15. zero_slot_unmasked             $3 = 0
   16. cmple_float                    $2 = lessThanEqual($2, $3)
   17. merge_condition_mask           CondMask = $1 & $2
   18. mask_off_loop_mask             LoopMask &= ~(CondMask & LoopMask & RetMask)
   19. load_condition_mask            CondMask = $1
   20. copy_slot_unmasked             $1 = x(3)
   21. copy_constant                  $2 = 0x3F800000 (1.0)
   22. cmpeq_float                    $1 = equal($1, $2)
   23. merge_loop_mask                LoopMask &= $1
   24. stack_rewind
   25. branch_if_any_active_lanes     branch_if_any_active_lanes -16 (#9)
   26. load_loop_mask                 LoopMask = $0
   27. store_loop_mask                $0 = LoopMask
   28. jump                           jump +18 (#46)
   29. zero_slot_unmasked             [temporary 0] = 0
   30. copy_slot_unmasked             $1 = x(2)
   31. copy_constant                  $2 = 0x3E800000 (0.25)
   32. sub_float                      $1 -= $2
   33. copy_slot_masked               x(2) = Mask($1)
   34. store_condition_mask           $1 = CondMask
   35. copy_slot_unmasked             $2 = x(3)
   36. copy_constant                  $3 = 0x3F800000 (1.0)
   37. cmpeq_float                    $2 = equal($2, $3)
   38. merge_condition_mask           CondMask = $1 & $2
   39. copy_constant                  $3 = 0xFFFFFFFF
   40. copy_slot_masked               [temporary 0] = Mask($3)
   41. mask_off_loop_mask             LoopMask &= ~(CondMask & LoopMask & RetMask)
   42. load_condition_mask            CondMask = $1
   43. zero_slot_unmasked             $1 = 0
   44. copy_slot_masked               x(1) = Mask($1)
   45. reenable_loop_mask             LoopMask |= [temporary 0]
   46. zero_slot_unmasked             $1 = 0
   47. copy_slot_unmasked             $2 = x(2)
   48. cmplt_float                    $1 = lessThan($1, $2)
   49. merge_loop_mask                LoopMask &= $1
   50. stack_rewind
   51. branch_if_any_active_lanes     branch_if_any_active_lanes -22 (#29)
   52. load_loop_mask                 LoopMask = $0
   53. copy_4_slots_unmasked          $0..3 = x
   54. copy_4_slots_unmasked          [main].result = $0..3
   55. load_src                       src.rgba = [main].result