util/cpt_upgraders/arm-ccregs.py

   1 # Use condition code registers for the ARM architecture.
   2 # Previously the integer register file was used for these registers.
   3 def upgrader(cpt):
   4     if cpt.get('root','isa') == 'arm':
   5         for sec in cpt.sections():
   6             import re
   7
   8             re_cpu_match = re.match('^(.*sys.*\.cpu[^.]*)\.xc\.(.+)$', sec)
   9             # Search for all the execution contexts
  10             if not re_cpu_match:
  11                 continue
  12
  13             items = []
  14             for (item,value) in cpt.items(sec):
  15                 items.append(item)
  16             if 'ccRegs' not in items:
  17                 intRegs = cpt.get(sec, 'intRegs').split()
  18
  19                 # Move those 5 integer registers to the ccRegs register file
  20                 ccRegs = intRegs[38:43]
  21                 del      intRegs[38:43]
  22
  23                 ccRegs.append('0') # CCREG_ZERO
  24
  25                 cpt.set(sec, 'intRegs', ' '.join(intRegs))
  26                 cpt.set(sec, 'ccRegs',  ' '.join(ccRegs))
  27
  28 legacy_version = 13