23 instructions

store_src_rg                   coords = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
copy_uniform                   $0 = unknownInput
cmpne_imm_float                $0 = notEqual($0, 0)
copy_slot_unmasked             b = $0
swizzle_4                      $0..3 = ($0..3).xxxx
copy_4_slots_unmasked          b4 = $0..3
copy_slot_unmasked             $0 = b
copy_slot_unmasked             $1 = $0
copy_constant                  b4(2) = 0
copy_constant                  b4(3) = 0xFFFFFFFF
copy_2_slots_unmasked          b4(0..1) = $0..1
copy_constant                  b4(0) = 0
copy_slot_unmasked             b4(1) = b
copy_constant                  b4(2) = 0xFFFFFFFF
copy_constant                  b4(3) = 0
copy_constant                  b4(0) = 0
copy_slot_unmasked             b4(1) = b
copy_constant                  b4(2) = 0
copy_slot_unmasked             b4(3) = b
copy_4_slots_unmasked          $0..3 = b4
bitwise_and_imm_4_ints         $0..3 &= 0x3F800000 (1.0)
load_src                       src.rgba = $0..3