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msvcrt: Add fesetenv implementation. 

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Piotr Caban 2017-02-07 17:42:43 +01:00 committed by Alexandre Julliard
parent 986a67ab37
commit 98a0c3df2e
1 changed files with 60 additions and 1 deletions
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61
dlls/msvcrt/math.c
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@ -1272,8 +1272,67 @@ void CDECL _fpreset(void)
*/
int CDECL MSVCRT_fesetenv(const MSVCRT_fenv_t *env)
{
FIXME("(%p) stub\n", env);
#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
struct {
WORD control_word;
WORD unused1;
WORD status_word;
WORD unused2;
WORD tag_word;
WORD unused3;
DWORD instruction_pointer;
WORD code_segment;
WORD unused4;
DWORD operand_addr;
WORD data_segment;
WORD unused5;
} fenv;
TRACE( "(%p)\n", env );
if (!env->control && !env->status) {
_fpreset();
return 0;
}
__asm__ __volatile__( "fnstenv %0" : "=m" (fenv) );
fenv.control_word &= ~0x3d;
if (env->control & MSVCRT__EM_INVALID) fenv.control_word |= 0x1;
if (env->control & MSVCRT__EM_ZERODIVIDE) fenv.control_word |= 0x4;
if (env->control & MSVCRT__EM_OVERFLOW) fenv.control_word |= 0x8;
if (env->control & MSVCRT__EM_UNDERFLOW) fenv.control_word |= 0x10;
if (env->control & MSVCRT__EM_INEXACT) fenv.control_word |= 0x20;
fenv.status_word &= ~0x3d;
if (env->status & MSVCRT__SW_INVALID) fenv.status_word |= 0x1;
if (env->status & MSVCRT__SW_ZERODIVIDE) fenv.status_word |= 0x4;
if (env->status & MSVCRT__SW_OVERFLOW) fenv.status_word |= 0x8;
if (env->status & MSVCRT__SW_UNDERFLOW) fenv.status_word |= 0x10;
if (env->status & MSVCRT__SW_INEXACT) fenv.status_word |= 0x20;
__asm__ __volatile__( "fldenv %0" : : "m" (fenv) : "st", "st(1)",
"st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)" );
if (sse2_supported)
{
DWORD fpword;
__asm__ __volatile__( "stmxcsr %0" : "=m" (fpword) );
fpword &= ~0x1e80;
if (env->control & MSVCRT__EM_INVALID) fpword |= 0x80;
if (env->control & MSVCRT__EM_ZERODIVIDE) fpword |= 0x200;
if (env->control & MSVCRT__EM_OVERFLOW) fpword |= 0x400;
if (env->control & MSVCRT__EM_UNDERFLOW) fpword |= 0x800;
if (env->control & MSVCRT__EM_INEXACT) fpword |= 0x1000;
__asm__ __volatile__( "ldmxcsr %0" : : "m" (fpword) );
}
return 0;
#else
FIXME( "not implemented\n" );
#endif
return 1;
}
/*********************************************************************