src/openpower/test/bitmanip/bitmanip_cases.py

   1 from openpower.test.common import TestAccumulatorBase
   2 from openpower.endian import bigendian
   3 from openpower.simulator.program import Program
   4 from hashlib import sha256
   5
   6
   7 def hash_256(v):
   8     return int.from_bytes(
   9         sha256(bytes(v, encoding='utf-8')).digest(),
  10         byteorder='little'
  11     )
  12
  13
  14 class BitManipTestCase(TestAccumulatorBase):
  15     def case_ternlogi(self):
  16         po = 5
  17         rt = 3
  18         ra = 4
  19         rb = 5
  20         rc = 1
  21         xo = 0
  22         for i in range(100):
  23             imm = hash_256(f"ternlogi imm {i}") & 0xFF
  24             instr = po
  25             instr = (instr << 5) | rt
  26             instr = (instr << 5) | ra
  27             instr = (instr << 5) | rb
  28             instr = (instr << 8) | imm
  29             instr = (instr << 2) | xo
  30             instr = (instr << 1) | rc
  31             lst = [f".4byte {hex(instr)}"]
  32             initial_regs = [0] * 32
  33             initial_regs[3] = hash_256(f"ternlogi rt {i}") % 2 ** 64
  34             initial_regs[4] = hash_256(f"ternlogi ra {i}") % 2 ** 64
  35             initial_regs[5] = hash_256(f"ternlogi rb {i}") % 2 ** 64
  36             self.add_case(Program(lst, bigendian), initial_regs)