117 lines
4.2 KiB
Python
117 lines
4.2 KiB
Python
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#!/usr/bin/python
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import math
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class Table(object):
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def __init__(self, table_entry=256, table_range=8):
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self.table_entry = table_entry
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self.table_range = table_range
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pass
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def sigmoid(self, x):
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return 1 / (1 + math.exp(-1*x))
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def tanh(self, x):
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return (math.exp(2*x)-1) / (math.exp(2*x)+1)
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def fp2q7(self, x):
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x_int = math.floor(x*(2**7)+0.5)
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if x_int >= 128 :
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x_int = 127
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if x_int < -128 :
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x_int = -128
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if x_int >= 0 :
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return x_int
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else :
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return 0x100 + x_int
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def fp2q15(self, x):
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x_int = math.floor(x*(2**15)+0.5)
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if x_int >= 2**15 :
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x_int = 2**15-1
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if x_int < -1*2**15 :
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x_int = -1*2**15
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if x_int >= 0 :
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return x_int
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else :
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return 0x10000 + x_int
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def table_gen(self):
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outfile = open("NNCommonTable.c", "wb")
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outfile.write("/*\n * Common tables for NN\n *\n *\n *\n *\n */\n\n#include \"arm_math.h\"\n#include \"NNCommonTable.h\"\n\n/*\n * Table for sigmoid\n */\n")
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for function_type in ["sigmoid", "tanh"]:
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for data_type in [7, 15]:
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out_type = "q"+str(data_type)+"_t"
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act_func = getattr(self, function_type)
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quan_func = getattr(self, 'fp2q'+str(data_type))
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# unified table
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outfile.write('const %s %sTable_q%d[%d] = {\n' % (out_type, function_type, data_type, self.table_entry) )
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for i in range(self.table_entry):
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# convert into actual value
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if i < self.table_entry/2:
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value_q7 = self.table_range * (i)
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else:
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value_q7 = self.table_range * (i - self.table_entry)
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if data_type == 7:
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#outfile.write('%f, ' % (act_func(float(value_q7)/256)))
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outfile.write('0x%02x, ' % (quan_func(act_func(float(value_q7)/self.table_entry))))
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else:
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#outfile.write('%f, ' % (act_func(float(value_q7)/256)))
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outfile.write('0x%04x, ' % (quan_func(act_func(float(value_q7)/self.table_entry))))
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if i % 8 == 7:
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outfile.write("\n")
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outfile.write("};\n\n")
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for data_type in [15]:
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out_type = "q"+str(data_type)+"_t"
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act_func = getattr(self, function_type)
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quan_func = getattr(self, 'fp2q'+str(data_type))
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# H-L tables
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outfile.write('const %s %sLTable_q%d[%d] = {\n' % (out_type, function_type, data_type, self.table_entry/2))
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for i in range(self.table_entry/2):
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# convert into actual value, max value is 16*self.table_entry/4 / 4
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# which is equivalent to self.table_entry / self.table_entry/2 = 2, i.e., 1/4 of 8
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if i < self.table_entry/4:
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value_q7 = self.table_range * i / 4
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else:
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value_q7 = self.table_range * (i - self.table_entry/2) / 4
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if data_type == 7:
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#outfile.write('%f, ' % (act_func(float(value_q7)/256)))
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outfile.write('0x%02x, ' % (quan_func(act_func(float(value_q7)/(self.table_entry/2)))))
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else:
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#outfile.write('%f, ' % (act_func(float(value_q7)/256)))
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outfile.write('0x%04x, ' % (quan_func(act_func(float(value_q7)/(self.table_entry/2)))))
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if i % 8 == 7:
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outfile.write("\n")
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outfile.write("};\n\n")
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outfile.write('const %s %sHTable_q%d[%d] = {\n' % (out_type, function_type, data_type, 3*self.table_entry/4))
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for i in range(3 * self.table_entry/4):
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# convert into actual value, tageting range (2, 8)
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if i < 3*self.table_entry/8 :
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value_q7 = self.table_range * ( i + self.table_entry/8 )
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else:
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value_q7 = self.table_range * ( i + self.table_entry/8 - self.table_entry)
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if data_type == 7:
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#outfile.write('%f, ' % (act_func(float(value_q7)/256)))
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outfile.write('0x%02x, ' % (quan_func(act_func(float(value_q7)/self.table_entry))))
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else:
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#outfile.write('%f, ' % (act_func(float(value_q7)/256)))
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outfile.write('0x%04x, ' % (quan_func(act_func(float(value_q7)/self.table_entry))))
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if i % 8 == 7:
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outfile.write("\n")
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outfile.write("};\n\n")
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outfile.close()
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mytable = Table(table_entry=256, table_range=16)
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mytable.table_gen()
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