# a0 is n, a1 is ptr to x[0], a2 is ptr to y[0], fa0 is a
     VBLK.REG[0] = {type: F, regkey: a3, regidx: a3, elwidth: dflt}
     VBLK.REG[1] = {type: F, regkey: a7, regidx: a7, elwidth: dflt}
     VBLK.MVL = 4
    loop:
     setvl  t0, a0          # vl = t0 = min(a0, MVL))
     ld     a3, a1          # load 4 registers a3-6 from x
     slli   t1, t0, 3       # t1 = vl * 8 (in bytes)
     ld     a7, a2          # load 4 registers a7-10 from y
     add    a1, a1, t1      # increment pointer to x by vl*8
     fmadd  a7, a3, fa0, a7 # v1 += v0 * fa0 (y = a * x + y)
     sub    a0, a0, t0      # n -= vl (t0)
     st     a7, a2          # store 4 registers a7-10 to y
     add    a2, a2, t1      # increment pointer to y by vl*8
     bnez   a0, loop        # repeat if n != 0