INNER CODE UNIT · Python

gen_fp_subB

herumi/mcl · misc/gen_test.py:60

def gen_fp_subB(N):
  align(16)
  with FuncProc(f'mclb_fp_subB{N}'):
    with StackFrame(4, N*2-3) as sf:
      pz = sf.p[0]
      px = sf.p[1]
      py = sf.p[2]
      pp = sf.p[3]
      X = sf.t[0:N]
      T = sf.t[N:]
      load_pm(X, px)   # X = px[]
      sub_pm(X, py)    # X = px[] - py[]
      T.append(px)
      T.append(py)
      T.append(pp)
      load_pm(T, pp)   # pp is destroyed
      sbb(rax, rax)
      and_re(T, rax)   # T = X < 0 ? p : 0

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