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Another test to exercise APInt divide step D6.
author
Yaron Keren
<yaron.keren@gmail.com>
Wed, 22 Apr 2015 18:49:59 +0000
(18:49 +0000)
committer
Yaron Keren
<yaron.keren@gmail.com>
Wed, 22 Apr 2015 18:49:59 +0000
(18:49 +0000)
This is divrem_big7 since divrem_big6 is used in Pawel upcoming patch.
llvm-svn: 235536
llvm/unittests/ADT/APIntTest.cpp
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diff --git
a/llvm/unittests/ADT/APIntTest.cpp
b/llvm/unittests/ADT/APIntTest.cpp
index
acdc1ec
..
a8fc362
100644
(file)
--- a/
llvm/unittests/ADT/APIntTest.cpp
+++ b/
llvm/unittests/ADT/APIntTest.cpp
@@
-409,6
+409,19
@@
TEST(APIntTest, divrem_big5) {
EXPECT_EQ(r, c);
}
+TEST(APIntTest, divrem_big7) {
+ // Yet another test for KnuthDiv rare step D6.
+ APInt a{224, "800000008000000200000005", 16};
+ APInt b{224, "fffffffd", 16};
+ APInt c{224, "80000000800000010000000f", 16};
+
+ auto p = a * b + c;
+ auto q = p.udiv(a);
+ auto r = p.urem(a);
+ EXPECT_EQ(q, b);
+ EXPECT_EQ(r, c);
+}
+
TEST(APIntTest, fromString) {
EXPECT_EQ(APInt(32, 0), APInt(32, "0", 2));
EXPECT_EQ(APInt(32, 1), APInt(32, "1", 2));