Hi Guys.
I created an OpenCL program to execute some mathematic operations. It worked fine in AMD video card (result matched with wolframalpha, for instance) but when I tried to use a computer with a Quadro 600 video card and linux, my program returned values that didn’t matched the precision we expected for function expm1(x).
I thought my video card had a problem, but I tried in another machine with quadro 600 and linux and obtained the same results from the first one.
I tried run this program in Windows and I don’t have this problem.
Some examples:
operation: expm1(input)
output: -0.727467
expected:-0.727468
input: -1.3
operation: expm1(input)
output: 0.733252
expected:0.733253
input: 0.55
operation: expm1(input)
output: 0.822116
expected:0.822119
input: 0.6
operation: expm1(input1)
output: 0.915535
expected:0.915541
input 1: 0.65
operation: expm1(input1)
output: 991.271
expected:991.275
input 1: 6.9
I’ve alread researched about this function ulp, but the maximun value is 1(full range)
Is this a problem with the driver for linux?
Thanks and Regards
Rafael R. Machado