diff options
Diffstat (limited to 'winsup/mingw/include/fenv.h')
| -rw-r--r-- | winsup/mingw/include/fenv.h | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/winsup/mingw/include/fenv.h b/winsup/mingw/include/fenv.h index 43dfd338a..5a2270289 100644 --- a/winsup/mingw/include/fenv.h +++ b/winsup/mingw/include/fenv.h @@ -1,7 +1,6 @@ #ifndef _FENV_H_ #define _FENV_H_ - /* FPU status word exception flags */ #define FE_INVALID 0x01 #define FE_DENORMAL 0x02 @@ -18,6 +17,18 @@ #define FE_UPWARD 0x0800 #define FE_TOWARDZERO 0x0c00 +/* The MXCSR exception flags are the same as the + FE flags. */ +#define __MXCSR_EXCEPT_FLAG_SHIFT 0 + +/* How much to shift FE status word exception flags + to get the MXCSR exeptions masks, */ +#define __MXCSR_EXCEPT_MASK_SHIFT 7 + +/* How much to shift FE control word rounding flags + to get MXCSR rounding flags, */ +#define __MXCSR_ROUND_FLAG_SHIFT 3 + #ifndef RC_INVOKED /* For now, support only for the basic abstraction of flags that are @@ -26,8 +37,10 @@ */ typedef unsigned short fexcept_t; -/* This 28-byte struct represents the entire floating point - environment as stored by fnstenv or fstenv */ +/* This 32-byte struct represents the entire floating point + environment as stored by fnstenv or fstenv, augmented by + the contents of the MXCSR register, as stored by stmxcsr + (if CPU supports it). */ typedef struct { unsigned short __control_word; @@ -40,8 +53,9 @@ typedef struct unsigned short __ip_selector; unsigned short __opcode; unsigned int __data_offset; - unsigned short __data_selector; - unsigned short __unused3; + unsigned short __data_selector; + unsigned short __unused3; + unsigned int __mxcsr; /* contents of the MXCSR register */ } fenv_t; |