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Support SSE float environment in fenv.h functions.

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* cpu_features.c: New file.
	* cpu_features.h: New file.
	* crt1.c: Include "cpu_features.h".
	(__mingw_CRTStartup): Call cpu_features_init().
	* Makefile.in (MING_OBJS): Add cpu_features.c.
	(SRCDIST_FILES): Add cpu_features.c, cpu_features.h.
	* include/fenv,h ( fenv_t;): Append  __mxcsr field.
	(__MXCSR_EXCEPT_FLAG_SHIFT): New define.
	(__MXCSR_EXCEPT_MASK_SHIFT): New define.
	(__MXCSR_ROUND_FLAG_SHIFT): New define.
	* mingwex/feclearexcept.c: Include "cpu_features.h".
	Handle SSE environment.
	* mingwex/fegetenv.c: Likewise.
	* mingwex/feholdexcept.c: Likewise.
	* mingwex/fesetenv.c: Likewise.
	* mingwex/fesetexceptflag.c: Likewise.
	* mingwex/fesetround.c: Likewise.
	* mingwex/fetestexcept.c: Likewise.
	* mingwex/feupdateenv.c: Likewise.
	* mingwex/fegetround.c: Add comment.
This commit is contained in:
Danny Smith
2006-07-03 10:32:58 +00:00
parent 69d5f3329f
commit f34428eb35
15 changed files with 252 additions and 17 deletions
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23
winsup/mingw/cpu_features.h Executable file
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@@ -0,0 +1,23 @@
#ifndef _CPU_FEATURES_H
#define _CPU_FEATURES_H
#include <stdbool.h>
#define _CRT_CMPXCHG8B 0x0001
#define _CRT_CMOV 0x0002
#define _CRT_MMX 0x0004
#define _CRT_FXSR 0x0008
#define _CRT_SSE 0x0010
#define _CRT_SSE2 0x0020
#define _CRT_SSE3 0x0040
#define _CRT_CMPXCHG16B 0x0080
#define _CRT_3DNOW 0x0100
#define _CRT_3DNOWP 0x0200
extern unsigned int __cpu_features;
/* Currently we use this in fpenv functions */
#define __HAS_SSE __cpu_features & _CRT_SSE
#endif