Piotr Caban : msvcrt: Don't reset x87 in x86_64 fpreset.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: f53b2095f36f1753b9a50d4dcb2eeab6c8c796cd
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=f53b2095f36f1753b9a50d4dcb2eeab6c8c796cd

Author: Piotr Caban <piotr at codeweavers.com>
Date:   Wed Aug  4 18:04:56 2021 +0200

msvcrt: Don't reset x87 in x86_64 fpreset.

Signed-off-by: Piotr Caban <piotr at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/msvcrt/math.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index d45327b8f1f..c385dd036b7 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -5901,7 +5901,7 @@ int CDECL _finite(double num)
  */
 void CDECL _fpreset(void)
 {
-#if (defined(__GNUC__) || defined(__clang__)) && (defined(__i386__) || defined(__x86_64__))
+#if (defined(__GNUC__) || defined(__clang__)) && defined(__i386__)
     const unsigned int x86_cw = 0x27f;
     __asm__ __volatile__( "fninit; fldcw %0" : : "m" (x86_cw) );
     if (sse2_supported)
@@ -5909,6 +5909,9 @@ void CDECL _fpreset(void)
         unsigned int cw = _MCW_EM, sw = 0;
         _setfp_sse(&cw, ~0, &sw, ~0);
     }
+#elif defined(__x86_64__)
+    unsigned int cw = _MCW_EM, sw = 0;
+    _setfp_sse(&cw, ~0, &sw, ~0);
 #else
     FIXME( "not implemented\n" );
 #endif