Avoid undefined underflow

mborland · mborland · commit a749b90204e4 · 2025-08-26T15:25:51.000+02:00
diff --git a/test/test_saturating_arith.cpp b/test/test_saturating_arith.cpp
@@ -240,8 +240,11 @@ void test_sub_sat<boost::int128::int128_t>()
             const auto sat_res {sub_sat(near_min,  i)};
             BOOST_TEST(sat_res == min);
 
+            // Signed overflow seems to saturate on ARM graviton
+            #ifndef __aarch64__
             const auto res {near_min - i};
             BOOST_TEST(sat_res != res);
+            #endif
         }
     }
 

Original file line number	Diff line number	Diff line change
`@@ -240,8 +240,11 @@ void test_sub_sat<boost::int128::int128_t>()`
`240`	`240`	`const auto sat_res {sub_sat(near_min, i)};`
`241`	`241`	`BOOST_TEST(sat_res == min);`
`242`	`242`
	`243`	`+ // Signed overflow seems to saturate on ARM graviton`
	`244`	`+ #ifndef __aarch64__`
`243`	`245`	`const auto res {near_min - i};`
`244`	`246`	`BOOST_TEST(sat_res != res);`
	`247`	`+ #endif`
`245`	`248`	`}`
`246`	`249`	`}`
`247`	`250`