From 1f13a236bf7a6cef2aa356282f6d335ce0f124da Mon Sep 17 00:00:00 2001
From: Evghenii <egaburov@dds.nl>
Date: Wed, 13 Nov 2013 13:03:26 +0100
Subject: [PATCH] small tuning

---
 builtins/target-nvptx64.ll | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/builtins/target-nvptx64.ll b/builtins/target-nvptx64.ll
index 2484eb1e..9714b0b2 100644
--- a/builtins/target-nvptx64.ll
+++ b/builtins/target-nvptx64.ll
@@ -149,7 +149,8 @@ entry:
 
 ;; nbx = (%ntx-1)/(blocksize/warpsize) + 1  for blocksize=128 & warpsize=32
   %ntxm1   = add nsw i32 %ntx, -1
-  %ntxm1d4 = sdiv i32 %ntxm1, 4
+;;  %ntxm1d4 = sdiv i32 %ntxm1, 4
+  %ntxm1d4 = ashr i32 %ntxm1, 2
   %nbx     = add nsw i32 %ntxm1d4, 1
   %call = tail call i32 @__tid_x()
   %call1 = tail call i32 @__warpsize()