From 0a47b8cbc59682f1eb414ca923daebbd9244c385 Mon Sep 17 00:00:00 2001
From: Jakub Chlanda <jakub@codeplay.com>
Date: Wed, 6 Oct 2021 11:48:15 +0100
Subject: [PATCH] Correctly set the index value for __shf_up.

---
 include/hip/amd_detail/amd_device_functions.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/hip/amd_detail/amd_device_functions.h b/include/hip/amd_detail/amd_device_functions.h
index f9b9570d..46f2eb80 100644
--- a/include/hip/amd_detail/amd_device_functions.h
+++ b/include/hip/amd_detail/amd_device_functions.h
@@ -425,7 +425,7 @@ inline
 int __shfl_up(int var, unsigned int lane_delta, int width = warpSize) {
     int self = __lane_id();
     int index = self - lane_delta;
-    index = (index < (self & ~(width-1)))?self:index;
+    index = (index < (self & ~(width-1)))?index:self;
     return __builtin_amdgcn_ds_bpermute(index<<2, var);
 }
 __device__