From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sun, 28 Jul 2019 17:09:44 +0000 (+0100)
Subject: add TODO, check mantissa overflow
X-Git-Tag: ls180-24jan2020~695
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3de0b9ec52bd5f472afe11638d114d6fdc37ee5a;p=ieee754fpu.git

add TODO, check mantissa overflow
---

diff --git a/src/ieee754/fcvt/pipeline.py b/src/ieee754/fcvt/pipeline.py
index 90c4c0b4..eaa320bf 100644
--- a/src/ieee754/fcvt/pipeline.py
+++ b/src/ieee754/fcvt/pipeline.py
@@ -150,6 +150,7 @@ class FPCVTFloatToIntMod(Elaboratable):
             m.d.comb += of.sticky.eq(msr.m_out[0])
             m.d.comb += of.m0.eq(msr.m_out[3])
 
+            # XXX TODO: check if this overflows the mantissa
             with m.If(of.roundz):
                 m.d.comb += self.o.z.eq(msr.m_out[3:]+1)
             with m.Else():