From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Mon, 18 Feb 2019 12:05:26 +0000 (+0000)
Subject: whoops set mantissa = -127 instead of exponent... oops...
X-Git-Tag: ls180-24jan2020~1912
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d30d28fd7c323582d79cf949fcd865d187fb9b9d;p=ieee754fpu.git

whoops set mantissa = -127 instead of exponent... oops...
---

diff --git a/src/add/fpbase.py b/src/add/fpbase.py
index 8c10d782..e18df3a5 100644
--- a/src/add/fpbase.py
+++ b/src/add/fpbase.py
@@ -308,7 +308,7 @@ class FPBase:
         m.next = next_state
         # denormalised, correct exponent to zero
         with m.If(z.is_denormalised()):
-            m.d.sync += z.m.eq(z.N127)
+            m.d.sync += z.e.eq(z.N127)
         # FIX SIGN BUG: -a + a = +0.
         with m.If((z.e == z.N126) & (z.m[0:] == 0)):
             m.d.sync += z.s.eq(0)
diff --git a/src/add/test_add.py b/src/add/test_add.py
index 8347c556..9a8ebe97 100644
--- a/src/add/test_add.py
+++ b/src/add/test_add.py
@@ -120,6 +120,7 @@ def run_test(dut, stimulus_a, stimulus_b):
             sys.exit(0)
 
 def testbench(dut):
+    yield from check_case(dut, 0x82471f51, 0x243985f, 0x801c3790)
     yield from check_case(dut, 0, 0, 0)
     yield from check_case(dut, 0x40000000, 0xc0000000, 0x00000000)
     yield from check_case(dut, 0x3F800000, 0x40000000, 0x40400000)