21 instructions

[immutable slots]
i0 = 0x40400000 (3.0)
i1 = 0x40000000 (2.0)
i2 = 0x3F800000 (1.0)
i3 = 0

store_src_rg                   coords = src.rg
init_lane_masks                CondMask = LoopMask = RetMask = true
copy_4_immutables_unmasked     x = i0..3 [0x40400000 (3.0), 0x40000000 (2.0), 0x3F800000 (1.0), 0]
copy_4_slots_unmasked          $0..3 = x
swizzle_3                      $0..2 = ($0..2).zyx
copy_3_slots_unmasked          x(0..2) = $0..2
splat_2_constants              s.i, s.j = 0
splat_2_constants              s.i, s.j = 0x40000000 (2.0)
copy_slot_unmasked             s.i = s.j
copy_slot_unmasked             s.j = s.i
splat_2_constants              a[0], a[1] = 0
copy_constant                  a[0] = 0x3F800000 (1.0)
copy_constant                  a[1] = 0
copy_slot_unmasked             a[1] = a[0]
copy_3_slots_unmasked          $0..2 = x(3), s.i, s.j
div_float                      $1 /= $2
copy_2_slots_unmasked          $2..3 = a[0], a[1]
sub_float                      $2 -= $3
copy_2_slots_unmasked          $3..4 = a[0], a[1]
mul_float                      $3 *= $4
load_src                       src.rgba = $0..3