From ba370cf84740727498a27de1427ec04e4ff554a6 Mon Sep 17 00:00:00 2001
From: Francesco Mazzoli <f@mazzo.li>
Date: Tue, 30 Nov 2021 21:52:42 +0000
Subject: [PATCH] Restrict packet-selecting logic test to 32-bit scalars

---
 test/vectorization_logic.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/test/vectorization_logic.cpp b/test/vectorization_logic.cpp
index 62d3f60ff..98a5b4340 100644
--- a/test/vectorization_logic.cpp
+++ b/test/vectorization_logic.cpp
@@ -283,10 +283,12 @@ struct vectorization_logic
       internal::is_same<typename internal::find_best_packet<Scalar, PacketSize*5+2>::type, PacketType>::value
     ));
     // In situations where the picking the full-packet would be detrimental the half-packet
-    // is chosen.
+    // is chosen. We restrict this test specifically for 32bit types: if we have 12 scalars,
+    // working at full-packet will involve 1+4 = 5 instructions, with half-packet 3
+    // instructions.
     STATIC_CHECK((
-      !(PacketSize > 2) ||
-      internal::is_same<typename internal::find_best_packet<Scalar, PacketSize*2-1>::type, HalfPacketType>::value
+      (PacketSize != 8) ||
+      internal::is_same<typename internal::find_best_packet<Scalar, 12>::type, HalfPacketType>::value
     ));
   }
 
-- 
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