Use larger offset since it's allowable

mborland · mborland · commit e131dda51ce2 · 2025-12-08T16:46:12.000+01:00
diff --git a/include/boost/decimal/detail/add_impl.hpp b/include/boost/decimal/detail/add_impl.hpp
@@ -337,17 +337,17 @@ constexpr auto d128_add_impl(T lhs_sig, U lhs_exp, bool lhs_sign,
     auto& sign_smaller {abs_lhs_bigger ? rhs_sign : lhs_sign};
     auto& sign_bigger {abs_lhs_bigger ? lhs_sign : rhs_sign};
 
-    if (delta_exp <= 2)
+    if (delta_exp <= 3)
     {
         sig_bigger *= pow10(static_cast<boost::int128::uint128_t>(delta_exp));
         exp_bigger -= delta_exp;
         delta_exp = 0;
     }
     else
     {
-        sig_bigger *= 100U;
-        delta_exp -= 2;
-        exp_bigger -= 2;
+        sig_bigger *= 1000U;
+        delta_exp -= 3;
+        exp_bigger -= 3;
 
         if (delta_exp > 1)
         {

Original file line number	Diff line number	Diff line change
`@@ -337,17 +337,17 @@ constexpr auto d128_add_impl(T lhs_sig, U lhs_exp, bool lhs_sign,`
`337`	`337`	`auto& sign_smaller {abs_lhs_bigger ? rhs_sign : lhs_sign};`
`338`	`338`	`auto& sign_bigger {abs_lhs_bigger ? lhs_sign : rhs_sign};`
`339`	`339`
`340`		`- if (delta_exp <= 2)`
	`340`	`+ if (delta_exp <= 3)`
`341`	`341`	`{`
`342`	`342`	`sig_bigger *= pow10(static_cast<boost::int128::uint128_t>(delta_exp));`
`343`	`343`	`exp_bigger -= delta_exp;`
`344`	`344`	`delta_exp = 0;`
`345`	`345`	`}`
`346`	`346`	`else`
`347`	`347`	`{`
`348`		`- sig_bigger *= 100U;`
`349`		`- delta_exp -= 2;`
`350`		`- exp_bigger -= 2;`
	`348`	`+ sig_bigger *= 1000U;`
	`349`	`+ delta_exp -= 3;`
	`350`	`+ exp_bigger -= 3;`
`351`	`351`
`352`	`352`	`if (delta_exp > 1)`
`353`	`353`	`{`