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msvcrt: Implement _control87 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 2021-08-03 15:56:12 +03:00 committed by Alexandre Julliard
parent 1b6f59b5d0
commit 6521134705
1 changed files with 31 additions and 0 deletions
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31
dlls/msvcrt/math.c
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@ -5554,6 +5554,37 @@ unsigned int CDECL _control87(unsigned int newval, unsigned int mask)
case _RC_DOWN: fpcr |= 0x800000; break;
}
__asm__ __volatile__( "msr fpcr, %0" :: "r" (fpcr) );
#elif defined(__arm__) && !defined(__SOFTFP__)
DWORD fpscr;
__asm__ __volatile__( "vmrs %0, fpscr" : "=r" (fpscr) );
if (!(fpscr & 0x100)) flags |= _EM_INVALID;
if (!(fpscr & 0x200)) flags |= _EM_ZERODIVIDE;
if (!(fpscr & 0x400)) flags |= _EM_OVERFLOW;
if (!(fpscr & 0x800)) flags |= _EM_UNDERFLOW;
if (!(fpscr & 0x1000)) flags |= _EM_INEXACT;
if (!(fpscr & 0x8000)) flags |= _EM_DENORMAL;
switch (fpscr & 0xc00000)
{
case 0x400000: flags |= _RC_UP; break;
case 0x800000: flags |= _RC_DOWN; break;
case 0xc00000: flags |= _RC_CHOP; break;
}
flags = (flags & ~mask) | (newval & mask);
fpscr &= ~0xc09f00ul;
if (!(flags & _EM_INVALID)) fpscr |= 0x100;
if (!(flags & _EM_ZERODIVIDE)) fpscr |= 0x200;
if (!(flags & _EM_OVERFLOW)) fpscr |= 0x400;
if (!(flags & _EM_UNDERFLOW)) fpscr |= 0x800;
if (!(flags & _EM_INEXACT)) fpscr |= 0x1000;
if (!(flags & _EM_DENORMAL)) fpscr |= 0x8000;
switch (flags & _MCW_RC)
{
case _RC_CHOP: fpscr |= 0xc00000; break;
case _RC_UP: fpscr |= 0x400000; break;
case _RC_DOWN: fpscr |= 0x800000; break;
}
__asm__ __volatile__( "vmsr fpscr, %0" :: "r" (fpscr) );
#else
FIXME( "not implemented\n" );
#endif