diff options
Diffstat (limited to 'winsup/mingw/mingwex/fesetenv.c')
| -rw-r--r-- | winsup/mingw/mingwex/fesetenv.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/winsup/mingw/mingwex/fesetenv.c b/winsup/mingw/mingwex/fesetenv.c index 3d7b5604a..105a0af10 100644 --- a/winsup/mingw/mingwex/fesetenv.c +++ b/winsup/mingw/mingwex/fesetenv.c @@ -1,5 +1,6 @@ #include <fenv.h> #include <float.h> +#include "cpu_features.h" /* 7.6.4.3 The fesetenv function establishes the floating-point environment @@ -15,6 +16,11 @@ extern void (*_imp___fpreset)( void ) ; int fesetenv (const fenv_t * envp) { + /* Default mxcsr status is to mask all exceptions. All other bits + are zero. */ + + unsigned int _csr = FE_ALL_EXCEPT << __MXCSR_EXCEPT_MASK_SHIFT /*= 0x1f80 */; + if (envp == FE_PC64_ENV) /* * fninit initializes the control register to 0x37f, @@ -37,7 +43,15 @@ int fesetenv (const fenv_t * envp) _fpreset(); else - __asm__ ("fldenv %0;" : : "m" (*envp)); - + { + __asm__ ("fldenv %0;" : : "m" (*envp)); + /* Setting the reserved high order bits of MXCSR causes a segfault */ + _csr = envp ->__mxcsr & 0xffff; + } + + /* Set MXCSR */ + if (__HAS_SSE) + __asm__ volatile ("ldmxcsr %0" : : "m" (_csr)); + return 0; } |