code: def mpf_abs(s, prec=None, rnd=round_fast):
      """Return abs(s) of the raw mpf s, rounded to the specified
      precision. The prec argument can be omitted to generate an
      exact result."""
      sign, man, exp, bc = s
      if (not man) and exp:
          if s == fninf:
              return finf
          return s
      if not prec:
          if sign:
              return (0, man, exp, bc)
          return s
      return normalize1(0, man, exp, bc, prec, rnd)
  
imports: import math
  from bisect import bisect
  import sys
  from .backend import MPZ, MPZ_TYPE, MPZ_ZERO, MPZ_ONE, MPZ_TWO, MPZ_FIVE, BACKEND, STRICT, HASH_MODULUS, HASH_BITS, gmpy, sage, sage_utils
  from .libintmath import giant_steps, trailtable, bctable, lshift, rshift, bitcount, trailing, sqrt_fixed, numeral, isqrt, isqrt_fast, sqrtrem, bin_to_radix
label_desc: Use image node_id 37 for calling a global function with example usage: mpf_abs(s, prec, rnd) and returns: normalize1, s, s, finf, int,  man,  exp,  bc