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ntdll: Fix the initial FPU control word on 64-bit.

This commit is contained in:
Alexandre Julliard 2010-06-21 11:49:25 +02:00
parent 2a26e954ec
commit 8b54390686
2 changed files with 6 additions and 8 deletions
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5
dlls/kernel32/tests/thread.c
View File

@ -1387,10 +1387,11 @@ static WORD get_thread_fpu_cw(void)
static void test_thread_fpu_cw(void)
{
WORD initial_cw, cw;
WORD initial_cw, cw, expect;
initial_cw = get_fpu_cw();
ok(initial_cw == 0x37f, "Expected FPU control word 0x37f, got %#x.\n", initial_cw);
expect = sizeof(void *) > sizeof(int) ? 0x27f : 0x37f;
ok(initial_cw == expect, "Expected FPU control word expect, got %#x.\n", initial_cw);
cw = get_thread_fpu_cw();
ok(cw == 0x27f, "Expected FPU control word 0x27f, got %#x.\n", cw);

9
dlls/ntdll/signal_x86_64.c
View File

@ -2330,6 +2330,7 @@ void signal_free_thread( TEB *teb )
*/
void signal_init_thread( TEB *teb )
{
const WORD fpu_cw = 0x27f;
stack_t ss;
#if defined __linux__
@ -2345,15 +2346,11 @@ void signal_init_thread( TEB *teb )
ss.ss_flags = 0;
if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
if (teb->Peb->ProcessHeap) /* Not for the inital thread. */
{
const WORD fpu_cw = 0x27f;
#ifdef __GNUC__
__asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
__asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
#else
FIXME("FPU setup not implemented for this platform.\n");
FIXME("FPU setup not implemented for this platform.\n");
#endif
}
}
/**********************************************************************