From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Fri, 19 Jun 2020 21:16:07 +0000 (+0100)
Subject: add trunc_div and trunc_rem functions
X-Git-Tag: 24jan2021_ls180~53
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9732bac97403bd4b4ca236a72297a181a87dcc50;p=nmutil.git

add trunc_div and trunc_rem functions
---

diff --git a/src/nmutil/divmod.py b/src/nmutil/divmod.py
new file mode 100644
index 0000000..2dc3196
--- /dev/null
+++ b/src/nmutil/divmod.py
@@ -0,0 +1,17 @@
+# this is a POWER ISA 3.0B compatible div function
+# however it is also the c, c++, rust, java *and* x86 way of doing things
+def trunc_div(n, d):
+    abs_n = abs(n)
+    abs_d = abs(d)
+    abs_q = n // d
+    if (n < 0) == (d < 0):
+        return abs_q
+    return -abs_q
+
+
+# this is a POWER ISA 3.0B compatible mod / remainder function
+# however it is also the c, c++, rust, java *and* x86 way of doing things
+def trunc_rem(n, d):
+    return n - d * trunc_div(n, d)
+
+