From ff31c39db52d051b86e03ef2c806ccf4699ffdb0 Mon Sep 17 00:00:00 2001
From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Mon, 8 Jul 2019 12:50:59 +0100
Subject: [PATCH] add fp64 mul unit test

---
 src/ieee754/fpcommon/test/unit_test_double.py |  2 +-
 src/ieee754/fpmul/test/mul_data64.py          |  7 +++++++
 src/ieee754/fpmul/test/test_fpmul_pipe_64.py  | 20 +++++++++++++++++++
 3 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 src/ieee754/fpmul/test/mul_data64.py
 create mode 100644 src/ieee754/fpmul/test/test_fpmul_pipe_64.py

diff --git a/src/ieee754/fpcommon/test/unit_test_double.py b/src/ieee754/fpcommon/test/unit_test_double.py
index 56cb8018..2714273e 100644
--- a/src/ieee754/fpcommon/test/unit_test_double.py
+++ b/src/ieee754/fpcommon/test/unit_test_double.py
@@ -13,7 +13,7 @@ def get_exponent(x):
     return ((x & 0x7ff0000000000000) >> 52) - 1023
 
 def set_exponent(x, e):
-    return (x & ~0x7ff0000000000000) | ((e+1023) << 23)
+    return (x & ~0x7ff0000000000000) | ((e+1023) << 52)
 
 def get_sign(x):
     return ((x & 0x8000000000000000) >> 63)
diff --git a/src/ieee754/fpmul/test/mul_data64.py b/src/ieee754/fpmul/test/mul_data64.py
new file mode 100644
index 00000000..3049477a
--- /dev/null
+++ b/src/ieee754/fpmul/test/mul_data64.py
@@ -0,0 +1,7 @@
+def regressions():
+    yield 0xff80000000000000, 0x7f80000000000000
+    yield 0x3351099a0528e138, 0xd651a9a9986af2b5
+    #yield 0x80000003ff800000, 0x4f0365445543ae3f
+    #yield 0x0004e1b1e94ef100, 0x42e1b4e00b65f134
+    #yield 0x80000003ff800000, 0xd249a98a4b9a6950
+
diff --git a/src/ieee754/fpmul/test/test_fpmul_pipe_64.py b/src/ieee754/fpmul/test/test_fpmul_pipe_64.py
new file mode 100644
index 00000000..5670737a
--- /dev/null
+++ b/src/ieee754/fpmul/test/test_fpmul_pipe_64.py
@@ -0,0 +1,20 @@
+""" test of FPMULMuxInOut
+"""
+
+from ieee754.fpmul.pipeline import (FPMULMuxInOut,)
+from ieee754.fpcommon.test.case_gen import run_pipe_fp
+from ieee754.fpcommon.test import unit_test_double
+from ieee754.fpmul.test.mul_data64 import regressions
+
+from sfpy import Float64
+from operator import mul
+
+
+def test_pipe_fp64():
+    dut = FPMULMuxInOut(64, 4)
+    run_pipe_fp(dut, 64, "mul", unit_test_double, Float64,
+                   regressions, mul, 10)
+
+
+if __name__ == '__main__':
+    test_pipe_fp64()
-- 
2.30.2