From 8999713301f7e79631e65403b861dbd7eb04d0b2 Mon Sep 17 00:00:00 2001
From: ptitSeb <sebastien.chev@gmail.com>
Date: Wed, 25 Oct 2023 22:37:12 +0200
Subject: [ARM64_DYNAREC] Small optimisation on 66 0F 57 opcode

---
 src/dynarec/arm64/dynarec_arm64_660f.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/dynarec/arm64/dynarec_arm64_660f.c b/src/dynarec/arm64/dynarec_arm64_660f.c
index 2d51440b..69cc17b8 100644
--- a/src/dynarec/arm64/dynarec_arm64_660f.c
+++ b/src/dynarec/arm64/dynarec_arm64_660f.c
@@ -1275,9 +1275,16 @@ uintptr_t dynarec64_660F(dynarec_arm_t* dyn, uintptr_t addr, uintptr_t ip, int n
         case 0x57:
             INST_NAME("XORPD Gx, Ex");
             nextop = F8;
-            GETEX(q0, 0, 0);
-            GETGX(v0, 1);
-            VEORQ(v0, v0, q0);
+            GETG;
+            if(MODREG && ((nextop&7)+(rex.b<<3)==gd)) {
+                // special case for XORPD Gx, Gx
+                q0 = sse_get_reg_empty(dyn, ninst, x1, gd);
+                VEORQ(q0, q0, q0);
+            } else {
+                q0 = sse_get_reg(dyn, ninst, x1, gd, 1);
+                GETEX(q1, 0, 0);
+                VEORQ(q0, q0, q1);
+            }
             break;
         case 0x58:
             INST_NAME("ADDPD Gx, Ex");
-- 
cgit 1.4.1