#!/usr/bin/env python3

import os

uarchdate = {
  'a53':20121030,
  'a72':20160101, # XXX: announced in 2015.02 but supposedly not shipped until 2016
  'airmont':20150401, # XXX: not sure about exact date
  'broadwell':20141027,
  'core2':20060726,
  'firestorm':20201110,
  'ares':20190220, # neoverse n1
  'goldencove':20211104,
  'goldmont':20160418,
  'haswell':20130604,
  'skylake':20150805,
  'tigerlake':20200902,
  'zen2':20190707,
  'zen3':20201105,
}

uarchname = {
  'a53':'Cortex-A53 (2012)',
  'a72':'Cortex-A72 (2016)',
  'airmont':'Airmont (2015)',
  'ares':'Ares (2019)',
  'broadwell':'Broadwell (2014)',
  'core2':'Core 2 (2006)',
  'firestorm':'Firestorm (2020)',
  'goldencove':'Golden Cove (2021)',
  'goldmont':'Goldmont (2016)',
  'haswell':'Haswell (2013)',
  'skylake':'Skylake (2015)',
  'tigerlake':'Tiger Lake (2020)',
  'zen2':'Zen 2 (2019)',
  'zen3':'Zen 3 (2020)',
}

def sortkey(m):
  uarch = ''.join(m.split('-')[:1])
  return uarchdate[uarch]

machines = sorted(os.listdir('benchmarks'),key=sortkey,reverse=True)

def lib25519(m,s2n=False,exp=False):
  uarch = uarchname[''.join(m.split('-')[:1])]

  benchmarksdir = ('benchmarks+s2n+exp' if s2n else 'benchmarks+exp') if exp else ('benchmarks+s2n' if s2n else 'benchmarks')
  libraryname = ('lib25519+s2n+exp' if s2n else 'lib25519+exp') if exp else ('lib25519+s2n' if s2n else 'lib25519')

  with open(f'{benchmarksdir}/{m}') as f:
    for line in f:
      line = line.split()
      if len(line) < 4: continue
      if line[:3] == ['dh_x25519_keypair','selected','32']:
        dh_keypair = int(line[3])
      if line[:3] == ['dh_x25519','selected','32']:
        dh = int(line[3])
      if line[:3] == ['sign_ed25519_keypair','selected','32']:
        sign_keypair = int(line[3])
      if line[:3] == ['sign_ed25519','selected','59']:
        sign = int(line[3])
      if line[:3] == ['sign_ed25519_open','selected','59']:
        verify = int(line[3])
      if line[:3] == ['nPbatch_montgomery25519','selected','16']:
        nPbatch_16 = int(line[3])
      if line[:3] == ['multiscalar_ed25519','selected','16']:
        multiscalar_16 = int(line[3])

  C = '<span class=lib25519>'
  D = '</span>'
  out.write(f'| | {C}{libraryname}{D} | {C}{dh_keypair}{D} | {C}{dh}{D} | {C}{nPbatch_16//16}{D} | {C}{sign_keypair}{D} | {C}{sign}{D} | {C}{verify}{D} | {C}{multiscalar_16//16}\n')

def openssl(m):
  uarch = uarchname[''.join(m.split('-')[:1])]

  with open(f'speedcomparison/openssl/{m}') as f:
    for line in f:
      line = line.split()
      if len(line) < 2: continue
      if line[:1] == ['x25519-keygen-main']:
        dh_keypair = int(line[1])
      if line[:1] == ['x25519-dh-main']:
        dh = int(line[1])
      if line[:1] == ['ed25519-keygen-main']:
        sign_keypair = int(line[1])
      if line[:1] == ['ed25519-sign-main']:
        sign = int(line[1])
      if line[:1] == ['ed25519-verify-main']:
        verify = int(line[1])

  C = '<span class=openssl>'
  D = '</span>'
  out.write(f'| {uarch} | {C}OpenSSL{D} | {C}{dh_keypair}{D} | {C}{dh}{D} | | {C}{sign_keypair}{D} | {C}{sign}{D} | {C}{verify}{D} | |\n')

def s2n(m):
  uarch = uarchname[''.join(m.split('-')[:1])]
  
  dh_keypair = None
  dh = None

  for alt in 'alt-','':
    with open(f'speedcomparison/s2n-bignum/{alt}{m}') as f:
      for line in f:
        line = line.split()
        if len(line) < 2: continue
        if line[:1] == ['x25519-keygen']:
          if dh_keypair is None or int(line[1]) < dh_keypair:
            dh_keypair = int(line[1])
        if line[:1] == ['x25519-dh']:
          if dh is None or int(line[1]) < dh:
            dh = int(line[1])

  C = '<span class=s2n>'
  D = '</span>'
  out.write(f'| | {C}s2n-bignum{D} | {C}{dh_keypair}{D} | {C}{dh}{D} | | | | | |\n')

with open('doc/speed.md.tmp','w') as out:
  with open('autogen/md-speed-top') as f:
    out.write(f.read())
  out.write('\n\n')
  out.write('| μarch | software | X key | X dh | X batch | Ed key | Ed sign | Ed verif | Ed MSM |\n')
  out.write('| :---- | :------- | ----: | ---: | ------: | -----: | ------: | -------: | -----: |\n')
  for m in machines:
    openssl(m)
    lib25519(m)
    lib25519(m,exp=True)
    lib25519(m,s2n=True,exp=True)
    lib25519(m,s2n=True)
    s2n(m)
  out.write('\n\n')
  with open('autogen/md-speed-bot') as f:
    out.write(f.read())

with open('doc/speed.md') as f:
  x = f.read()
with open('doc/speed.md.tmp') as f:
  y = f.read()
if x != y:
  os.rename('doc/speed.md.tmp','doc/speed.md')
else:
  os.remove('doc/speed.md.tmp')