From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Mon, 15 Jul 2019 16:45:56 +0000 (+0100)
Subject: hilarious: fp upconvert of zero was wrong
X-Git-Tag: ls180-24jan2020~834
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=23f909f9a968fd5def056ebe53ca4a3a7ec5352d;p=ieee754fpu.git

hilarious: fp upconvert of zero was wrong
---

diff --git a/src/ieee754/fcvt/pipeline.py b/src/ieee754/fcvt/pipeline.py
index 865b036b..16f602b9 100644
--- a/src/ieee754/fcvt/pipeline.py
+++ b/src/ieee754/fcvt/pipeline.py
@@ -108,6 +108,8 @@ class FPCVTUpConvertMod(Elaboratable):
                     m.d.comb += self.o.of.sticky.eq(0)
                     m.d.comb += self.o.of.m0.eq(a1.m[0])
                     m.d.comb += self.o.out_do_z.eq(0) # normalise
+                with m.Else():
+                    m.d.comb += self.o.z.zero(a1.s)
 
         # copy the context (muxid, operator)
         m.d.comb += self.o.oz.eq(self.o.z.v)