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msvcrt: Make _setfp* helpers infallible. 

The functions may only fail on unsupported compilers/architectures. It's
not really possible to handle errors properly.

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Piotr Caban 2021-12-21 12:55:07 +01:00 committed by Alexandre Julliard
parent 564ede5d32
commit c521ec04c9
1 changed files with 9 additions and 22 deletions
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31
dlls/msvcrt/math.c
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@ -5167,7 +5167,7 @@ double CDECL modf( double x, double *iptr )
}
#if defined(__i386__) || defined(__x86_64__)
static BOOL _setfp_sse( unsigned int *cw, unsigned int cw_mask,
static void _setfp_sse( unsigned int *cw, unsigned int cw_mask,
unsigned int *sw, unsigned int sw_mask )
{
#if defined(__GNUC__) || defined(__clang__)
@ -5256,17 +5256,15 @@ static BOOL _setfp_sse( unsigned int *cw, unsigned int cw_mask,
if (fpword != old_fpword)
__asm__ __volatile__( "ldmxcsr %0" : : "m" (fpword) );
return TRUE;
#else
FIXME("not implemented\n");
if (cw) *cw = 0;
if (sw) *sw = 0;
return FALSE;
#endif
}
#endif
static BOOL _setfp( unsigned int *cw, unsigned int cw_mask,
static void _setfp( unsigned int *cw, unsigned int cw_mask,
unsigned int *sw, unsigned int sw_mask )
{
#if (defined(__GNUC__) || defined(__clang__)) && defined(__i386__)
@ -5376,16 +5374,15 @@ static BOOL _setfp( unsigned int *cw, unsigned int cw_mask,
fenv.status_word = newsw;
__asm__ __volatile__( "fldenv %0" : : "m" (fenv) : "st", "st(1)",
"st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)" );
return TRUE;
return;
}
if (oldsw != newsw)
__asm__ __volatile__( "fnclex" );
if (oldcw != newcw)
__asm__ __volatile__( "fldcw %0" : : "m" (newcw) );
return TRUE;
#elif defined(__x86_64__)
return _setfp_sse(cw, cw_mask, sw, sw_mask);
_setfp_sse(cw, cw_mask, sw, sw_mask);
#elif defined(__aarch64__)
ULONG_PTR old_fpsr = 0, fpsr = 0, old_fpcr = 0, fpcr = 0;
unsigned int flags;
@ -5465,7 +5462,6 @@ static BOOL _setfp( unsigned int *cw, unsigned int cw_mask,
__asm__ __volatile__( "msr fpsr, %0" :: "r" (fpsr) );
if (old_fpcr != fpcr)
__asm__ __volatile__( "msr fpcr, %0" :: "r" (fpcr) );
return TRUE;
#elif defined(__arm__) && !defined(__SOFTFP__)
DWORD old_fpscr, fpscr;
unsigned int flags;
@ -5533,12 +5529,10 @@ static BOOL _setfp( unsigned int *cw, unsigned int cw_mask,
if (old_fpscr != fpscr)
__asm__ __volatile__( "vmsr fpscr, %0" :: "r" (fpscr) );
return TRUE;
#else
FIXME("not implemented\n");
if (cw) *cw = 0;
if (sw) *sw = 0;
return FALSE;
#endif
}
@ -5648,8 +5642,7 @@ int CDECL __control87_2( unsigned int newval, unsigned int mask,
if (x86_cw)
{
*x86_cw = newval;
if (!_setfp(x86_cw, mask, NULL, 0))
return 0;
_setfp(x86_cw, mask, NULL, 0);
}
if (!sse2_cw) return 1;
@ -5657,8 +5650,7 @@ int CDECL __control87_2( unsigned int newval, unsigned int mask,
if (sse2_supported)
{
*sse2_cw = newval;
if (!_setfp_sse(sse2_cw, mask, NULL, 0))
return 0;
_setfp_sse(sse2_cw, mask, NULL, 0);
}
else *sse2_cw = 0;
@ -6053,17 +6045,12 @@ int CDECL fesetenv(const fenv_t *env)
#endif
#ifdef __i386__
if (!_setfp(&x87_cw, mask, &x87_stat, ~0))
return 1;
_setfp(&x87_cw, mask, &x87_stat, ~0);
if (sse2_supported)
{
if (!_setfp_sse(&cw, mask, &stat, ~0))
return 1;
}
_setfp_sse(&cw, mask, &stat, ~0);
return 0;
#else
if (!_setfp(&cw, mask, &stat, ~0))
return 1;
_setfp(&cw, mask, &stat, ~0);
return 0;
#endif
}