EvoApproxLib^LITE

How to use the model from Python

#Make sure that cython extension is installed
#> pip install --user cython

# The source code of the mul8s_1L2J extension needs to be downloaded first
> curl -s "https://ehw.fit.vutbr.cz/evoapproxlib/v1.2022?folder=multiplers/8x8_signed/pareto_pwr_ep&file=mul8s_1L2J.c&pyx=bash" | bash

#Finally, the extension can be used in a Python script as follows
> python
import pyximport; pyximport.install()
import mul8s_1L2J

def u2s(v): # 16b unsigned to 16b signed
    if v & 32768:
	return v - 65536
    return v

wce = e = 0
for i in range(-2**7,2**7):
    for j in range(-2**7,2**7):
        diff = abs(u2s(mul8s_1L2J.mul(i,j)) - (i*j))
        if diff > wce: wce = diff
        e += diff

print('average error magnitude (mae)',e/(2.0**(16)))
print('worst-case error magnitude (wce)',wce)