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lib/math: Add a `do_div' test module

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Implement a module for correctness and performance evaluation for the
`do_div' function, often handled in an optimised manner by platform
code.  Use a somewhat randomly generated set of inputs that is supposed
to be representative, using the same set of divisors twice, expressed as
a constant and as a variable each, so as to verify the implementation
for both cases should they be handled by different code execution paths.
Reference results were produced with GNU bc.

At the conclusion output the total execution time elapsed.

Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Maciej W. Rozycki
2021-04-20 04:50:28 +02:00
committed by Thomas Bogendoerfer
parent 1b6bc35a01
commit 5086ea4b0f
3 changed files with 261 additions and 0 deletions
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lib/math/Makefile
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@@ -4,3 +4,5 @@ obj-y += div64.o gcd.o lcm.o int_pow.o int_sqrt.o reciprocal_div.o
obj-$(CONFIG_CORDIC) += cordic.o
obj-$(CONFIG_PRIME_NUMBERS) += prime_numbers.o
obj-$(CONFIG_RATIONAL) += rational.o
obj-$(CONFIG_TEST_DIV64) += test_div64.o