From: Sandipan Das <sandipan@linux.ibm.com>
Date: Sat, 6 Feb 2021 11:48:12 +0000 (+0530)
Subject: arch-power: Add doubleword modulo instructions
X-Git-Tag: develop-gem5-snapshot~41
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a257d6eb51baa10be386af09e707d7d179ffb456;p=gem5.git

arch-power: Add doubleword modulo instructions

This adds the following instructions.
  * Modulo Signed Doubleword (modsd)
  * Modulo Unsigned Doubleword (modud)

Change-Id: Ic7bcb85869ccedf5c95aadfe925c85b3b1155031
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 6c8cba9cd..06636a2f8 100644
--- a/src/arch/power/isa/decoder.isa
+++ b/src/arch/power/isa/decoder.isa
@@ -413,6 +413,26 @@ decode PO default Unknown::unknown() {
                     Rt = 0;
                 }
             }});
+
+            777: modsd({{
+                int64_t src1 = Ra_sd;
+                int64_t src2 = Rb_sd;
+                if ((src1 != INT64_MIN || src2 != -1) && src2 != 0) {
+                    Rt = src1 % src2;
+                } else {
+                    Rt = 0;
+                }
+            }});
+
+            265: modud({{
+                uint64_t src1 = Ra;
+                uint64_t src2 = Rb;
+                if (src2 != 0) {
+                    Rt = src1 % src2;
+                } else {
+                    Rt = 0;
+                }
+            }});
         }
 
         format IntOp {