28 instructions

[immutable slots]
i0 = 0xBFA00000 (-1.25)
i1 = 0xBFA00000 (-1.25)
i2 = 0xBFA00000 (-1.25)
i3 = 0

store_src_rg                   coords = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
copy_4_uniforms                _0_v = testInputs
copy_4_uniforms                $0..3 = colorBlack
cast_to_int_from_4_floats      $0..3 = FloatToInt($0..3)
copy_4_slots_unmasked          _1_i = $0..3
copy_slot_unmasked             $12 = _1_i(0)
copy_from_indirect_unmasked    $0 = Indirect(_0_v(0) + $12)
copy_slot_unmasked             _2_x = $0
copy_slot_unmasked             $12 = _1_i(1)
copy_from_indirect_unmasked    $0 = Indirect(_0_v(0) + $12)
copy_slot_unmasked             _3_y = $0
copy_slot_unmasked             $12 = _1_i(2)
copy_from_indirect_unmasked    $0 = Indirect(_0_v(0) + $12)
copy_slot_unmasked             _4_z = $0
copy_slot_unmasked             $12 = _1_i(3)
copy_from_indirect_unmasked    $0 = Indirect(_0_v(0) + $12)
copy_slot_unmasked             _5_w = $0
copy_4_slots_unmasked          $0..3 = _2_x, _3_y, _4_z, _5_w
copy_4_immutables_unmasked     $4..7 = i0..3 [0xBFA00000 (-1.25), 0xBFA00000 (-1.25), 0xBFA00000 (-1.25), 0]
cmpeq_4_floats                 $0..3 = equal($0..3, $4..7)
bitwise_and_2_ints             $0..1 &= $2..3
bitwise_and_int                $0 &= $1
swizzle_4                      $0..3 = ($0..3).xxxx
copy_4_uniforms                $4..7 = colorRed
copy_4_uniforms                $8..11 = colorGreen
mix_4_ints                     $0..3 = mix($4..7, $8..11, $0..3)
load_src                       src.rgba = $0..3