code: def format_si_prefix(x, si_prefix):
      exp10 = 10 ** (SI_PREFIXES.index(si_prefix) * 3 + YOCTO_EXP10)
      return float(x) / exp10
  
file_path: tvm/python/tvm/autotvm/utils.py
imports: import logging
  import time
  import numpy
  import tvm.arith
  from tvm.tir import expr
  from tvm.contrib.popen_pool import PopenPoolExecutor
label_desc: Use image node_id 6 for calling a global function with example usage: format_si_prefix(x, si_prefix) and returns: unknown