StdLib: Add support for AArch64

[mirror_edk2.git] / StdLib / Include / Aarch64 / machine / fenv.h

diff --git a/StdLib/Include/Aarch64/machine/fenv.h b/StdLib/Include/Aarch64/machine/fenv.h
new file mode 100644 (file)
index 0000000..8e255f5
--- /dev/null
+++ b/StdLib/Include/Aarch64/machine/fenv.h
@@ -0,0 +1,39 @@
+/*  $NetBSD: fenv.h,v 1.2 2014/01/29 00:22:09 matt Exp $    */\r
+\r
+/*\r
+ * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995\r
+ * Public domain.\r
+ */\r
+\r
+#ifndef _AARCH64_FENV_H_\r
+#define _AARCH64_FENV_H_\r
+\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
+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 /* _AARCH64_FENV_H_ */\r