From 7e7db57369ede7be613f11ad726bbb2991e91982 Mon Sep 17 00:00:00 2001
From: ptitSeb <sebastien.chev@gmail.com>
Date: Sun, 25 Jun 2023 14:54:45 +0200
Subject: [32BITS][ARM64_DYNAREC] Added (F2/F3) 66 AD opcode

---
 src/dynarec/arm64/dynarec_arm64_66.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/dynarec/arm64/dynarec_arm64_66.c b/src/dynarec/arm64/dynarec_arm64_66.c
index 21f906ce..e72d58d4 100755
--- a/src/dynarec/arm64/dynarec_arm64_66.c
+++ b/src/dynarec/arm64/dynarec_arm64_66.c
@@ -633,6 +633,29 @@ uintptr_t dynarec64_66(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int nin
             }
             break;
 
+        case 0xAD:
+            if(rep) {
+                INST_NAME("REP LODSW");
+                CBZx_NEXT(xRCX);
+                TBNZ_MARK2(xFlags, F_DF);
+                MARK;   // Part with DF==0
+                LDRH_S9_postindex(xRAX, xRSI, 2);
+                SUBx_U12(xRCX, xRCX, 1);
+                CBNZx_MARK(xRCX);
+                B_NEXT_nocond;
+                MARK2;  // Part with DF==1
+                LDRH_S9_postindex(xRAX, xRSI, -2);
+                SUBx_U12(xRCX, xRCX, 1);
+                CBNZx_MARK2(xRCX);
+                // done
+            } else {
+                INST_NAME("STOSW");
+                GETDIR(x3, 2);
+                LDRH_U12(xRAX, xRSI, 0);
+                ADDx_REG(xRSI, xRSI, x3);
+            }
+            break;
+
         case 0xAF:
             switch(rep) {
             case 1:
-- 
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