From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sun, 28 Apr 2019 13:45:03 +0000 (+0100)
Subject: add a few comments
X-Git-Tag: ls180-24jan2020~1157
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7c76f6c047bfb3110d611e9038bc8fd9a1293a73;p=ieee754fpu.git

add a few comments
---

diff --git a/src/add/fsqrt.py b/src/add/fsqrt.py
index 72850314..c2d32a7a 100644
--- a/src/add/fsqrt.py
+++ b/src/add/fsqrt.py
@@ -16,6 +16,7 @@ def sqrtsimple(num):
     return res
 
 
+# XXX DO NOT USE, fails on num=65536.  wark-wark...
 def sqrt(num):
     D = num # D is input (from num)
     Q = 0
@@ -59,6 +60,8 @@ def set_exponent(x, e):
 def get_sign(x):
     return ((x & 0x80000000) >> 31)
 
+# main function, takes mantissa and exponent as separate arguments
+# returns a tuple, sqrt'd mantissa, sqrt'd exponent
 
 def main(mantissa, exponent):
     if exponent & 1 != 0: