StdLib/LibC: Add software floating point library from NetBSD

[mirror_edk2.git] / StdLib / Include / Arm / machine / fenv.h

diff --git a/StdLib/Include/Arm/machine/fenv.h b/StdLib/Include/Arm/machine/fenv.h
new file mode 100644 (file)
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+++ b/StdLib/Include/Arm/machine/fenv.h
@@ -0,0 +1,55 @@
+/*  $NetBSD: fenv.h,v 1.2 2014/01/29 00:22:09 matt Exp $    */\r
+/** @file\r
+*\r
+*  Copyright (c) 2013 - 2014, ARM Limited. All rights reserved.\r
+*\r
+*  This program and the accompanying materials\r
+*  are licensed and made available under the terms and conditions of the BSD License\r
+*  which accompanies this distribution.  The full text of the license may be found at\r
+*  http://opensource.org/licenses/bsd-license.php\r
+*\r
+*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+*\r
+**/\r
+ /*\r
+ * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995\r
+ * Public domain.\r
+ */\r
+\r
+#ifndef _ARM_FENV_H_\r
+#define _ARM_FENV_H_\r
+\r
+#ifdef __ARM_PCS_AAPCS64\r
+/* AArch64 split FPSCR into two registers FPCR and FPSR */\r
+typedef struct {\r
+    unsigned int __fpcr;\r
+    unsigned int __fpsr;\r
+} fenv_t;\r
+#else\r
+typedef int fenv_t;     /* FPSCR */\r
+#endif\r
+typedef int fexcept_t;\r
+\r
+#define FE_INVALID      0x01    /* invalid operation exception */\r
+#define FE_DIVBYZERO    0x02    /* divide-by-zero exception */\r
+#define FE_OVERFLOW     0x04    /* overflow exception */\r
+#define FE_UNDERFLOW    0x08    /* underflow exception */\r
+#define FE_INEXACT      0x10    /* imprecise (loss of precision; "inexact") */\r
+\r
+#define FE_ALL_EXCEPT   0x1f\r
+\r
+#define FE_TONEAREST    0   /* round to nearest representable number */\r
+#define FE_UPWARD       1   /* round toward positive infinity */\r
+#define FE_DOWNWARD     2   /* round toward negative infinity */\r
+#define FE_TOWARDZERO   3   /* round to zero (truncate) */\r
+\r
+__BEGIN_DECLS\r
+\r
+/* Default floating-point environment */\r
+extern const fenv_t   __fe_dfl_env;\r
+#define FE_DFL_ENV    (&__fe_dfl_env)\r
+\r
+__END_DECLS\r
+\r
+#endif /* _ARM_FENV_H_ */\r