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| author | Elizabeth Hunt <elizabeth.hunt@simponic.xyz> | 2023-09-25 10:36:23 -0600 |
|---|---|---|
| committer | Elizabeth Hunt <elizabeth.hunt@simponic.xyz> | 2023-09-25 10:36:23 -0600 |
| commit | 58c73fd511b77cb94124b71a4bb75c7ab6a6d8bc (patch) | |
| tree | 25ae52afe365de29973efbb10fdecf2712deb430 /cl/tests/maceps.lisp | |
| parent | 2e284b71500a1f8dc6cc46ecf21eb1e9389ea780 (diff) | |
| download | cmath-58c73fd511b77cb94124b71a4bb75c7ab6a6d8bc.tar.gz cmath-58c73fd511b77cb94124b71a4bb75c7ab6a6d8bc.zip | |
add september notes & hw2 code / pdf
Diffstat (limited to 'cl/tests/maceps.lisp')
| -rw-r--r-- | cl/tests/maceps.lisp | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/cl/tests/maceps.lisp b/cl/tests/maceps.lisp new file mode 100644 index 0000000..9d61772 --- /dev/null +++ b/cl/tests/maceps.lisp @@ -0,0 +1,25 @@ +(defpackage lizfcm/tests.maceps + (:use :cl + :fiveam + :lizfcm.approx + :lizfcm.utils + :lizfcm/tests) + (:export :approx-suite)) +(in-package :lizfcm/tests.maceps) + +(def-suite maceps-suite + :in lizfcm-test-suite) +(in-suite maceps-suite) + +(test maceps + :description "double precision provides precision about (mac eps of single precision) squared" + (let* ((maceps-computation-double (compute-maceps 1.0d0 + (lambda (x) x))) + (maceps-computation-single (compute-maceps 1.0 + (lambda (x) x))) + (last-double-h (cadar (last maceps-computation-double))) + (last-single-h (cadar (last maceps-computation-single)))) + (is (within-range-p + (- last-double-h (* last-single-h last-single-h)) + 0 + last-single-h)))) |