From: Sandipan Das <sandipan@linux.vnet.ibm.com>
Date: Thu, 7 Jun 2018 10:46:01 +0000 (+0530)
Subject: arch-power: Add fixed-point logical parity instructions
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6181165186cd6653d643a324c4b5288cdeb5e766;p=gem5.git

arch-power: Add fixed-point logical parity instructions

This adds the following logical instructions:
  * Parity Word (prtyw)
  * Parity Doubleword (prtyd)

Change-Id: Icb1737435dfabf9ac7b14ce1fcdf1c232289bf24
Signed-off-by: Sandipan Das <sandipan@linux.vnet.ibm.com>
---

diff --git a/src/arch/power/isa/decoder.isa b/src/arch/power/isa/decoder.isa
index deaea7041..116931858 100644
--- a/src/arch/power/isa/decoder.isa
+++ b/src/arch/power/isa/decoder.isa
@@ -557,6 +557,23 @@ decode PO default Unknown::unknown() {
 
             506: popcntd({{ Ra = popCount(Rs); }});
 
+            154: prtyw({{
+                uint64_t res = Rs;
+                res = res ^ (res >> 16);
+                res = res ^ (res >> 8);
+                res = res & 0x100000001;
+                Ra = res;
+            }});
+
+            186: prtyd({{
+                uint64_t res = Rs;
+                res = res ^ (res >> 32);
+                res = res ^ (res >> 16);
+                res = res ^ (res >> 8);
+                res = res & 0x1;
+                Ra = res;
+            }});
+
             24: slw({{
                 if (Rb & 0x20) {
                     Ra = 0;