Add constant time conditional swap, add, sub for bigint words

Not optimized and relies on asm support for const time word_add/word_sub
instructions.

Fix a bug introduced in 46e9a89 - unpoison needs to call the valgrind
API with the pointer rather than the reference. Caused values not to
be unpoisoned.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/tests/tests.h b/src/tests/tests.h
index 5a075975d..0c561a7d3 100644
--- a/src/tests/tests.h
+++ b/src/tests/tests.h
@@ -174,6 +174,13 @@ class Test
             bool test_eq(const std::string& what, bool produced, bool expected);
 
             bool test_eq(const std::string& what, size_t produced, size_t expected);
+
+            template<typename I1, typename I2>
+            bool test_int_eq(I1 x, I2 y, const char* what)
+               {
+               return test_eq(what, static_cast<size_t>(x), static_cast<size_t>(y));
+               }
+
             bool test_lt(const std::string& what, size_t produced, size_t expected);
             bool test_gte(const std::string& what, size_t produced, size_t expected);