From 3b8ba5dfa645e267fe6a949985f1e2acdb61b2d4 Mon Sep 17 00:00:00 2001
From: ptitSeb <sebastien.chev@gmail.com>
Date: Sat, 14 Sep 2024 15:21:15 +0200
Subject: Added 66 F3 0F BD opcode ([ARM64_DYNAREC] Too)

---
 src/dynarec/arm64/dynarec_arm64_66f30f.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'src/dynarec')

diff --git a/src/dynarec/arm64/dynarec_arm64_66f30f.c b/src/dynarec/arm64/dynarec_arm64_66f30f.c
index 11a18eba..66e349df 100644
--- a/src/dynarec/arm64/dynarec_arm64_66f30f.c
+++ b/src/dynarec/arm64/dynarec_arm64_66f30f.c
@@ -56,6 +56,27 @@ uintptr_t dynarec64_66F30F(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int
 
     switch(opcode) {
 
+        case 0xBD:
+            INST_NAME("LZCNT Gw, Ew");
+            SETFLAGS(X_CF|X_ZF, SF_SUBSET);
+            SET_DFNONE(x1);
+            nextop = F8;
+            GETEW(x1, 0);
+            GETGW(x2);
+            IFX(X_CF) {
+                TSTxw_REG(ed, ed);
+                CSETw(x3, cEQ);
+                BFIw(xFlags, x3, F_CF, 1);  // CF = is source 0?
+            }
+            LSLw_IMM(ed, ed, 16);
+            CLZw(gd, ed);
+            IFX(X_ZF) {
+                TSTxw_REG(gd, gd);
+                CSETw(x3, cEQ);
+                BFIw(xFlags, x3, F_ZF, 1);  // ZF = is dest 0?
+            }
+            EWBACK;
+            break;
 
         default:
             DEFAULT;
-- 
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