From 5b0c598cc71a5e914bfc4dbb7ea44313d45c8f57 Mon Sep 17 00:00:00 2001
From: Weiqun Zhang <WeiqunZhang@lbl.gov>
Date: Wed, 7 Sep 2022 09:42:57 -0700
Subject: [PATCH] Fix a warning in packing communication send buffer (#2940)

When we communication double precision data in single precision, there is a
conversion from double to float in packing the send buffer.  A static cast
is added to fix the warning.
---
 Src/Base/AMReX_FBI.H | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Src/Base/AMReX_FBI.H b/Src/Base/AMReX_FBI.H
index 61ef452b601..cc0bfeecbce 100644
--- a/Src/Base/AMReX_FBI.H
+++ b/Src/Base/AMReX_FBI.H
@@ -924,7 +924,7 @@ FabArray<FAB>::pack_send_buffer_cpu (FabArray<FAB> const& src, int scomp, int nc
                 amrex::LoopConcurrentOnCpu( bx, ncomp,
                 [=] (int ii, int jj, int kk, int n) noexcept
                 {
-                    pfab(ii,jj,kk,n) = sfab(ii,jj,kk,n+scomp);
+                    pfab(ii,jj,kk,n) = static_cast<BUF>(sfab(ii,jj,kk,n+scomp));
                 });
                 dptr += (bx.numPts() * ncomp * sizeof(BUF));
             }