msvcrt: Don't reset x87 in x86_64 fpreset.

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

msvcrt: Don't reset x87 in x86_64 fpreset.
f53b2095 · Piotr Caban · Alexandre Julliard · f46ef017 · f53b2095
Commit f53b2095 authored Aug 04, 2021 by Piotr Caban Committed by Alexandre Julliard Aug 04, 2021
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math.c dlls/msvcrt/math.c +4 -1

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--- 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