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changeset 10409:f0b817243938

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bitrotate: Test 8/16-bit rotates with 0 and maximum rotate amounts.
author Simon Josefsson <simon@josefsson.org>
date Mon, 08 Sep 2008 12:18:02 +0200
parents b59f0c45c546
children ad3484c9aa0c
files ChangeLog tests/test-bitrotate.c
diffstat 2 files changed, 11 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2008-09-08  Simon Josefsson  <simon@josefsson.org>
 
+	* tests/test-bitrotate.c: Test 8/16-bit rotates with 0 and maximum
+	rotate amounts.
+
 	* lib/bitrotate.h: Doc fix, mention that N can be wider than minimally
 	required for 16-bit and 8-bit rotates.
 	* lib/bitrotate.h (rotl64, rotr64, rotl32, rotl32, rotl16, rotr16,
--- a/tests/test-bitrotate.c
+++ b/tests/test-bitrotate.c
@@ -39,6 +39,7 @@
 int
 main (void)
 {
+  ASSERT (rotl8 (42, 0) == 42);
   ASSERT (rotl8 (42, 1) == 84);
   ASSERT (rotl8 (42, 2) == 168);
   ASSERT (rotl8 (42, 3) == 81);
@@ -46,7 +47,9 @@
   ASSERT (rotl8 (42, 5) == 69);
   ASSERT (rotl8 (42, 6) == 138);
   ASSERT (rotl8 (42, 7) == 21);
+  ASSERT (rotl8 (42, 8) == 42);
 
+  ASSERT (rotr8 (42, 0) == 42);
   ASSERT (rotr8 (42, 1) == 21);
   ASSERT (rotr8 (42, 2) == 138);
   ASSERT (rotr8 (42, 3) == 69);
@@ -54,7 +57,9 @@
   ASSERT (rotr8 (42, 5) == 81);
   ASSERT (rotr8 (42, 6) == 168);
   ASSERT (rotr8 (42, 7) == 84);
+  ASSERT (rotr8 (42, 8) == 42);
 
+  ASSERT (rotl16 (43981, 0) == 43981);
   ASSERT (rotl16 (43981, 1) == 22427);
   ASSERT (rotl16 (43981, 2) == 44854);
   ASSERT (rotl16 (43981, 3) == 24173);
@@ -70,7 +75,9 @@
   ASSERT (rotl16 (43981, 13) == 46457);
   ASSERT (rotl16 (43981, 14) == 27379);
   ASSERT (rotl16 (43981, 15) == 54758);
+  ASSERT (rotl16 (43981, 16) == 43981);
 
+  ASSERT (rotr16 (43981, 0) == 43981);
   ASSERT (rotr16 (43981, 1) == 54758);
   ASSERT (rotr16 (43981, 2) == 27379);
   ASSERT (rotr16 (43981, 3) == 46457);
@@ -86,6 +93,7 @@
   ASSERT (rotr16 (43981, 13) == 24173);
   ASSERT (rotr16 (43981, 14) == 44854);
   ASSERT (rotr16 (43981, 15) == 22427);
+  ASSERT (rotr16 (43981, 16) == 43981);
 
   ASSERT (rotl32 (2309737967U, 1) == 324508639U);
   ASSERT (rotl32 (2309737967U, 2) == 649017278U);