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msvcrt: Fix _control87 ambiguous return value. 

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Piotr Caban 2020-07-07 16:08:00 +02:00 committed by Alexandre Julliard
parent f2a804b9ea
commit 33190b694f
3 changed files with 32 additions and 0 deletions
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1
dlls/msvcrt/math.c
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@ -1250,6 +1250,7 @@ unsigned int CDECL _control87(unsigned int newval, unsigned int mask)
__control87_2( newval, mask, &flags, &sse2_cw );
if ((flags ^ sse2_cw) & (MSVCRT__MCW_EM | MSVCRT__MCW_RC)) flags |= MSVCRT__EM_AMBIGUOUS;
flags |= sse2_cw;
#elif defined(__x86_64__)
unsigned long fpword;
unsigned int old_flags;

28
dlls/ucrtbase/tests/misc.c
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@ -335,6 +335,33 @@ static void test___fpe_flt_rounds(void)
ok((_controlfp(_RC_CHOP, _RC_CHOP) & _RC_CHOP) == _RC_CHOP, "_controlfp(_RC_CHOP, _RC_CHOP) failed\n");
ret = __fpe_flt_rounds();
ok(ret == 0, "__fpe_flt_rounds returned %d\n", ret);
_controlfp(cfp, _MCW_EM | _MCW_RC | _MCW_PC);
}
static void test__control87_2(void)
{
#ifdef __i386__
unsigned int x86_cw_init, sse2_cw_init, x86_cw, sse2_cw, r;
r = __control87_2(0, 0, &x86_cw_init, &sse2_cw_init);
ok(r == 1, "__control87_2 returned %d\n", r);
r = __control87_2(0, _EM_INVALID, &x86_cw, NULL);
ok(r == 1, "__control87_2 returned %d\n", r);
ok(x86_cw == (x86_cw_init & ~_EM_INVALID), "x86_cw = %x, x86_cw_init = %x\n", x86_cw, x86_cw_init);
r = __control87_2(0, 0, &x86_cw, &sse2_cw);
ok(r == 1, "__control87_2 returned %d\n", r);
ok(x86_cw == (x86_cw_init & ~_EM_INVALID), "x86_cw = %x, x86_cw_init = %x\n", x86_cw, x86_cw_init);
ok(sse2_cw == sse2_cw_init, "sse2_cw = %x, sse2_cw_init = %x\n", sse2_cw, sse2_cw_init);
r = _control87(0, 0);
ok(r == (x86_cw | sse2_cw | _EM_AMBIGUOUS), "r = %x, expected %x\n",
r, x86_cw | sse2_cw | _EM_AMBIGUOUS);
_control87(x86_cw_init, ~0);
#endif
}
static void __cdecl global_invalid_parameter_handler(
@ -1347,6 +1374,7 @@ START_TEST(misc)
test__register_onexit_function();
test__execute_onexit_table();
test___fpe_flt_rounds();
test__control87_2();
test__get_narrow_winmain_command_line(arg_v[0]);
test__sopen_dispatch();
test__sopen_s();

3
include/msvcrt/float.h
View File

@ -140,6 +140,9 @@ _ACRTIMP int __cdecl __fpe_flt_rounds(void);
unsigned int __cdecl _control87(unsigned int, unsigned int);
unsigned int __cdecl _controlfp(unsigned int, unsigned int);
errno_t __cdecl _controlfp_s(unsigned int *, unsigned int, unsigned int);
#ifdef __i386__
int __cdecl __control87_2(unsigned int, unsigned int, unsigned int *, unsigned int *);
#endif
double __cdecl _copysign (double, double);
double __cdecl _chgsign (double);