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msvcrt: Implement fesetenv for arm. 

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 18:04:37 +02:00 committed by Alexandre Julliard
parent 6391a9f897
commit 8c02239619
1 changed files with 27 additions and 1 deletions
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28
dlls/msvcrt/math.c
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@ -5731,7 +5731,7 @@ static __msvcrt_ulong fenv_encode(unsigned int x, unsigned int y)
return x | y;
}
#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__)
#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || (defined(__arm__) && !defined(__SOFTFP__))
static BOOL fenv_decode(__msvcrt_ulong enc, unsigned int *x, unsigned int *y)
{
if (enc & 0x20)
@ -6069,6 +6069,32 @@ int CDECL fesetenv(const fenv_t *env)
__asm__ __volatile__( "msr fpsr, %0" :: "r" (fpsr) );
_control87(fp_cw, 0xffffffff);
return 0;
#elif defined(__arm__) && !defined(__SOFTFP__)
DWORD fpscr;
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__( "vmrs %0, fpscr" : "=r" (fpscr) );
fpscr &= ~0x9f;
if (fp_stat & _SW_INVALID) fpscr |= 0x1;
if (fp_stat & _SW_ZERODIVIDE) fpscr |= 0x2;
if (fp_stat & _SW_OVERFLOW) fpscr |= 0x4;
if (fp_stat & _SW_UNDERFLOW) fpscr |= 0x8;
if (fp_stat & _SW_INEXACT) fpscr |= 0x10;
if (fp_stat & _SW_DENORMAL) fpscr |= 0x80;
__asm__ __volatile__( "vmsr fpscr, %0" :: "r" (fpscr) );
_control87(fp_cw, 0xffffffff);
return 0;
#else
FIXME( "not implemented\n" );
#endif