From 0692d4f3f25e43f82f8ecf7a3d575d47ca9eb7c6 Mon Sep 17 00:00:00 2001
From: ptitSeb <sebastien.chev@gmail.com>
Date: Mon, 8 Mar 2021 15:53:48 +0100
Subject: Added 66 0F 2E/2F opcodes

---
 src/emu/x64run660f.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'src')

diff --git a/src/emu/x64run660f.c b/src/emu/x64run660f.c
index 6dfa4485..9b48405d 100644
--- a/src/emu/x64run660f.c
+++ b/src/emu/x64run660f.c
@@ -43,6 +43,25 @@ int Run660F(x64emu_t *emu, rex_t rex)
         GETED(0);
         break;
 
+    case 0x2E:                      /* UCOMISD Gx, Ex */
+        // no special check...
+    case 0x2F:                      /* COMISD Gx, Ex */
+        RESET_FLAGS(emu);
+        nextop = F8;
+        GETEX(0);
+        GETGX;
+        if(isnan(GX->d[0]) || isnan(EX->d[0])) {
+            SET_FLAG(F_ZF); SET_FLAG(F_PF); SET_FLAG(F_CF);
+        } else if(isgreater(GX->d[0], EX->d[0])) {
+            CLEAR_FLAG(F_ZF); CLEAR_FLAG(F_PF); CLEAR_FLAG(F_CF);
+        } else if(isless(GX->d[0], EX->d[0])) {
+            CLEAR_FLAG(F_ZF); CLEAR_FLAG(F_PF); SET_FLAG(F_CF);
+        } else {
+            SET_FLAG(F_ZF); CLEAR_FLAG(F_PF); CLEAR_FLAG(F_CF);
+        }
+        CLEAR_FLAG(F_OF); CLEAR_FLAG(F_AF); CLEAR_FLAG(F_SF);
+        break;
+
     case 0x62:  /* PUNPCKLDQ Gx,Ex */
         nextop = F8;
         GETEX(0);
-- 
cgit 1.4.1