From 99677ebabd43ad20feeee91e2fad9b06835b0654 Mon Sep 17 00:00:00 2001
From: Sachin Gupta <sgupta2m@in.ibm.com>
Date: Fri, 7 Oct 2016 04:56:07 -0500
Subject: Do not optimize busy for loop

Change-Id: Ia12a5ba093f7d1551d3c94d67fc324e80750951a
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/30869
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: RAJA DAS <rajadas2@in.ibm.com>
Reviewed-by: Shakeeb A. Pasha B K <shakeebbk@in.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: SRINIVAS V. POLISETTY <srinivan@in.ibm.com>
Reviewed-by: Douglas R. Gilbert <dgilbert@us.ibm.com>
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>
---
 src/hwpf/src/plat/plat_utils.C | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/hwpf')

diff --git a/src/hwpf/src/plat/plat_utils.C b/src/hwpf/src/plat/plat_utils.C
index f9bbea9a..74980799 100644
--- a/src/hwpf/src/plat/plat_utils.C
+++ b/src/hwpf/src/plat/plat_utils.C
@@ -115,8 +115,10 @@ namespace fapi2
             ((l_adjusted_simcycles - (NUM_OVERHEAD_INSTRS * __FAPI_DELAY_PPE_SIM_CYCLES__)) /
                         (NUM_LOOP_INSTRS * __FAPI_DELAY_PPE_SIM_CYCLES__));
 
-
-        for (auto i = delay_loop_count; i > 0; --i) {}
+        for (auto i = delay_loop_count; i > 0; --i) {
+            // Force compiler not to optimize for loop
+             asm("");
+        }
 
 #endif
 
-- 
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