14 instructions

store_src                      src = src.rgba
store_dst                      dst = dst.rgba
init_lane_masks                CondMask = LoopMask = RetMask = true
copy_4_slots_unmasked          $0..3 = src
copy_constant                  $4 = 0x3F800000 (1.0)
copy_slot_unmasked             $5 = src(3)
sub_float                      $4 -= $5
swizzle_4                      $4..7 = ($4..7).xxxx
splat_4_constants              $8..11 = 0x3F800000 (1.0)
copy_4_slots_unmasked          $12..15 = dst
sub_4_floats                   $8..11 -= $12..15
mul_4_floats                   $4..7 *= $8..11
add_4_floats                   $0..3 += $4..7
load_src                       src.rgba = $0..3