https://bugs.winehq.org/show_bug.cgi?id=27594
qsniyg qsniyg@mail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |qsniyg@mail.com
--- Comment #38 from qsniyg qsniyg@mail.com --- I've sent https://source.winehq.org/patches/data/188278
The issue appears to be that _control87 doesn't actually send the sse2_cw parameter to __control87_2.
I created the following test, mimicking the game's behavior:
unsigned long x86_fpword = 0x0031047f; unsigned long sse_fpword = 0x3fa1;
__asm__ __volatile__( "fldcw %0" : : "m" (x86_fpword) ); // load __asm__ __volatile__( "ldmxcsr %0" : : "m" (sse_fpword) ); // load
_control87(0x100, 0x300);
__asm__ __volatile__( "fstcw %0" : "=m" (x86_fpword) ); // store __asm__ __volatile__( "stmxcsr %0" : "=m" (sse_fpword) ); // store
printf("Modified: x86=%08x sse=%08x\n", x86_fpword, sse_fpword);
This returns:
Modified: x86=0031047f sse=00003fa1
Under native msvcrt, but the wine's version (before the patch) returned this:
Modified: x86=0031047f sse=00003f80