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# -*- coding: utf-8 -*-
#
# AWL simulator - instructions
#
# Copyright 2012-2018 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from __future__ import division, absolute_import, print_function, unicode_literals
#from awlsim.common.cython_support cimport * #@cy
from awlsim.common.compat import *
from awlsim.common.exceptions import *
from awlsim.common.datatypehelpers import * #+cimport
from awlsim.core.instructions.main import * #+cimport
from awlsim.core.operatortypes import * #+cimport
from awlsim.core.operators import * #+cimport
from math import log #@nocy
#from libc.math cimport log #@cy
class AwlInsn_LN(AwlInsn): #+cdef
__slots__ = ()
def __init__(self, cpu, rawInsn=None, **kwargs):
AwlInsn.__init__(self, cpu, AwlInsn.TYPE_LN, rawInsn, **kwargs)
self.assertOpCount(0)
def run(self): #+cdef
#@cy cdef double accu1Float
#@cy cdef uint32_t accu1DWord
accu1DWord = self.cpu.accu1.get()
accu1Float = self.cpu.accu1.getPyFloat()
if isNaN(accu1DWord):
self.cpu.accu1.set(floatConst.pNaNDWord)
accu1Float = self.cpu.accu1.getPyFloat()
elif accu1DWord == floatConst.negInfDWord or\
accu1DWord == floatConst.posInfDWord:
pass
elif accu1Float <= 0.0:
accu1Float = floatConst.nNaNFloat
self.cpu.accu1.set(floatConst.pNaNDWord)
else:
accu1Float = log(accu1Float)
self.cpu.accu1.setPyFloat(accu1Float)
self.cpu.statusWord.setForFloatingPoint(accu1Float)
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