From 58c73fd511b77cb94124b71a4bb75c7ab6a6d8bc Mon Sep 17 00:00:00 2001
From: Elizabeth Hunt <elizabeth.hunt@simponic.xyz>
Date: Mon, 25 Sep 2023 10:36:23 -0600
Subject: add september notes & hw2 code / pdf

---
 cl/tests/maceps.lisp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 cl/tests/maceps.lisp

(limited to 'cl/tests/maceps.lisp')

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))))
-- 
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