From: Sandipan Das <sandipan@linux.ibm.com>
Date: Sat, 6 Feb 2021 11:51:30 +0000 (+0530)
Subject: arch-power: Add parity instructions
X-Git-Tag: develop-gem5-snapshot~29
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=20b16babda20437a6dcf27e3e12ea2f5b229a2a7;p=gem5.git

arch-power: Add parity instructions

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

Change-Id: Ic102d722f1bc8cea4921ddbf9febfa0e7c0f892e
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
---

diff --git a/src/arch/power/isa/decoder.isa b/src/arch/power/isa/decoder.isa
index 08b9d10ad..4482f2a1f 100644
--- a/src/arch/power/isa/decoder.isa
+++ b/src/arch/power/isa/decoder.isa
@@ -554,6 +554,23 @@ 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;