headers for x86_64

1 files changed, 93 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/x86_64/bits/fenv.h b/libc/sysdeps/linux/x86_64/bits/fenv.h
new file mode 100644
index 000000000..04576933f
--- /dev/null
+++ b/libc/sysdeps/linux/x86_64/bits/fenv.h
@@ -0,0 +1,93 @@
+/* Copyright (C) 1997,1998,1999,2000,2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _FENV_H
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+
+/* Define bits representing the exception.  We use the bit positions
+   of the appropriate bits in the FPU control word.  */
+enum
+  {
+    FE_INVALID = 0x01,
+#define FE_INVALID	FE_INVALID
+    __FE_DENORM = 0x02,
+    FE_DIVBYZERO = 0x04,
+#define FE_DIVBYZERO	FE_DIVBYZERO
+    FE_OVERFLOW = 0x08,
+#define FE_OVERFLOW	FE_OVERFLOW
+    FE_UNDERFLOW = 0x10,
+#define FE_UNDERFLOW	FE_UNDERFLOW
+    FE_INEXACT = 0x20
+#define FE_INEXACT	FE_INEXACT
+  };
+
+#define FE_ALL_EXCEPT \
+	(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
+
+/* The ix87 FPU supports all of the four defined rounding modes.  We
+   use again the bit positions in the FPU control word as the values
+   for the appropriate macros.  */
+enum
+  {
+    FE_TONEAREST = 0,
+#define FE_TONEAREST	FE_TONEAREST
+    FE_DOWNWARD = 0x400,
+#define FE_DOWNWARD	FE_DOWNWARD
+    FE_UPWARD = 0x800,
+#define FE_UPWARD	FE_UPWARD
+    FE_TOWARDZERO = 0xc00
+#define FE_TOWARDZERO	FE_TOWARDZERO
+  };
+
+
+/* Type representing exception flags.  */
+typedef unsigned short int fexcept_t;
+
+
+/* Type representing floating-point environment.  This structure
+   corresponds to the layout of the block written by the `fstenv'
+   instruction and has additional fields for the contents of the MXCSR
+   register as written by the `stmxcsr' instruction.  */
+typedef struct
+  {
+    unsigned short int __control_word;
+    unsigned short int __unused1;
+    unsigned short int __status_word;
+    unsigned short int __unused2;
+    unsigned short int __tags;
+    unsigned short int __unused3;
+    unsigned int __eip;
+    unsigned short int __cs_selector;
+    unsigned int __opcode:11;
+    unsigned int __unused4:5;
+    unsigned int __data_offset;
+    unsigned short int __data_selector;
+    unsigned short int __unused5;
+    unsigned int __mxcsr;
+  }
+fenv_t;
+
+/* If the default argument is used we use this value.  */
+#define FE_DFL_ENV	((__const fenv_t *) -1)
+
+#ifdef __USE_GNU
+/* Floating-point environment where none of the exception is masked.  */
+# define FE_NOMASK_ENV	((__const fenv_t *) -2)
+#endif