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msvcrt: Implement fesetenv for arm64. 

Signed-off-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Martin Storsjö 2021-08-04 18:04:32 +02:00 committed by Alexandre Julliard
parent d13bf70a8e
commit 6391a9f897
1 changed files with 34 additions and 4 deletions
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38
dlls/msvcrt/math.c
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@ -5626,7 +5626,7 @@ int CDECL _controlfp_s(unsigned int *cur, unsigned int newval, unsigned int mask
return 0;
}
#if _MSVCR_VER >= 140
#if _MSVCR_VER >= 140 && (defined(__i386__) || defined(__x86_64__))
enum fenv_masks
{
FENV_X_INVALID = 0x00100010,
@ -5689,7 +5689,6 @@ static __msvcrt_ulong fenv_encode(unsigned int x, unsigned int y)
}
/* decodes x87/sse control/status word, returns FALSE on error */
#if (defined(__i386__) || defined(__x86_64__))
static BOOL fenv_decode(__msvcrt_ulong enc, unsigned int *x, unsigned int *y)
{
*x = *y = 0;
@ -5723,16 +5722,21 @@ static BOOL fenv_decode(__msvcrt_ulong enc, unsigned int *x, unsigned int *y)
}
return TRUE;
}
#endif
#elif _MSVCR_VER >= 120
static __msvcrt_ulong fenv_encode(unsigned int x, unsigned int y)
{
if (y & _EM_DENORMAL)
y = (y & ~_EM_DENORMAL) | 0x20;
return x | y;
}
#if (defined(__i386__) || defined(__x86_64__))
#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__)
static BOOL fenv_decode(__msvcrt_ulong enc, unsigned int *x, unsigned int *y)
{
if (enc & 0x20)
enc = (enc & ~0x20) | _EM_DENORMAL;
*x = *y = enc;
return TRUE;
}
@ -6038,6 +6042,32 @@ int CDECL fesetenv(const fenv_t *env)
__asm__ __volatile__( "ldmxcsr %0" : : "m" (fpword) );
}
return 0;
#elif defined(__aarch64__)
ULONG_PTR fpsr;
unsigned int tmp, fp_cw, fp_stat;
if (!env->_Fe_ctl && !env->_Fe_stat) {
_fpreset();
return 0;
}
if (!fenv_decode(env->_Fe_ctl, &tmp, &fp_cw))
return 1;
if (!fenv_decode(env->_Fe_stat, &tmp, &fp_stat))
return 1;
_control87(_MCW_EM, _MCW_EM);
__asm__ __volatile__( "mrs %0, fpsr" : "=r" (fpsr) );
fpsr &= ~0x9f;
if (fp_stat & _SW_INVALID) fpsr |= 0x1;
if (fp_stat & _SW_ZERODIVIDE) fpsr |= 0x2;
if (fp_stat & _SW_OVERFLOW) fpsr |= 0x4;
if (fp_stat & _SW_UNDERFLOW) fpsr |= 0x8;
if (fp_stat & _SW_INEXACT) fpsr |= 0x10;
if (fp_stat & _SW_DENORMAL) fpsr |= 0x80;
__asm__ __volatile__( "msr fpsr, %0" :: "r" (fpsr) );
_control87(fp_cw, 0xffffffff);
return 0;
#else
FIXME( "not implemented\n" );