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msvcrt: Don't set x87 control word in x86_64 fesetenv. 

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Piotr Caban 2021-07-21 13:21:23 +02:00 committed by Alexandre Julliard
parent 5189d73b54
commit 67c7c40351
1 changed files with 4 additions and 0 deletions
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4
dlls/msvcrt/math.c
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@ -5873,6 +5873,7 @@ int CDECL fesetenv(const fenv_t *env)
{
#if (defined(__GNUC__) || defined(__clang__)) && (defined(__i386__) || defined(__x86_64__))
unsigned int x87_cw, sse_cw, x87_stat, sse_stat;
#ifdef __i386__
struct {
WORD control_word;
WORD unused1;
@ -5887,6 +5888,7 @@ int CDECL fesetenv(const fenv_t *env)
WORD data_segment;
WORD unused5;
} fenv;
#endif
TRACE( "(%p)\n", env );
@ -5900,6 +5902,7 @@ int CDECL fesetenv(const fenv_t *env)
if (!fenv_decode(env->_Fe_stat, &x87_stat, &sse_stat))
return 1;
#ifdef __i386__
__asm__ __volatile__( "fnstenv %0" : "=m" (fenv) );
fenv.control_word &= ~0xc3d;
@ -5938,6 +5941,7 @@ int CDECL fesetenv(const fenv_t *env)
__asm__ __volatile__( "fldenv %0" : : "m" (fenv) : "st", "st(1)",
"st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)" );
#endif
if (sse2_supported)
{