diff options
Diffstat (limited to 'winsup/cygwin/fenv.cc')
| -rwxr-xr-x | winsup/cygwin/fenv.cc | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/winsup/cygwin/fenv.cc b/winsup/cygwin/fenv.cc index 63670f7..8746636 100755 --- a/winsup/cygwin/fenv.cc +++ b/winsup/cygwin/fenv.cc @@ -1,6 +1,6 @@ /* fenv.cc - Copyright 2010 Red Hat, Inc. + Copyright 2010, 2011 Red Hat, Inc. This file is part of Cygwin. @@ -8,9 +8,11 @@ This software is a copyrighted work licensed under the terms of the Cygwin license. Please consult the file "CYGWIN_LICENSE" for details. */ -#include <string.h> +#include "winsup.h" #include "fenv.h" #include "errno.h" +#include "wincap.h" +#include <string.h> /* Mask and shift amount for rounding bits. */ #define FE_CW_ROUND_MASK (0x0c00) @@ -419,8 +421,9 @@ _feinitialise (void) /* Check for presence of SSE: invoke CPUID #1, check EDX bit 25. */ eax = 1; __asm__ volatile ("cpuid" : "=d" (edx), "+a" (eax) :: "%ecx", "%ebx"); - /* If this flag isn't set, we'll avoid trying to execute any SSE. */ - if (edx & (1 << 25)) + /* If this flag isn't set, or if the OS doesn't support SSE (NT4, at least + up to SP4) we'll avoid trying to execute any SSE. */ + if ((edx & (1 << 25)) != 0 && wincap.supports_sse ()) use_sse = true; /* Reset FPU: extended prec, all exceptions cleared and masked off. */ |