From 3623cb9785a1c7b593ebc65c42c23a4db981ada4 Mon Sep 17 00:00:00 2001
From: ptitSeb <sebastien.chev@gmail.com>
Date: Thu, 31 Mar 2022 09:11:54 +0200
Subject: Improved test17 (sse), and fixed NAN bordercase for PSQRTPD opcode

---
 src/emu/x64run660f.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/emu/x64run660f.c b/src/emu/x64run660f.c
index 148c99eb..09354192 100644
--- a/src/emu/x64run660f.c
+++ b/src/emu/x64run660f.c
@@ -794,8 +794,14 @@ int Run660F(x64emu_t *emu, rex_t rex)
         nextop = F8;
         GETEX(0);
         GETGX;
-        GX->d[0] = sqrt(EX->d[0]);
-        GX->d[1] = sqrt(EX->d[1]);
+        for (int i=0; i<2; ++i) {
+            #ifndef NOALIGN
+            if(EX->d[i]<0.0) // on x86, default nan are negative
+                GX->d[i] = -NAN;
+            else
+            #endif
+            GX->d[i] = sqrt(EX->d[i]);
+        }
         break;
 
     case 0x54:                      /* ANDPD Gx, Ex */
-- 
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