m68k: really add fenv from musl-1.1.24

Somehow the first review merged only the commit log. FreeBSD doesn't have m68k anyway, so use fenv from musl with as less changes as possible. Change-Id: I6372af6679e6773fbb6bf4c8b5b30512971a97a6 Reviewed-on: https://review.haiku-os.org/c/haiku/+/3161 Reviewed-by: Alex von Gluck IV <[email protected]>
2020-08-19 15:23:47 +00:00
parent 48099e3e48
commit 425515d0ac
6 changed files with 240 additions and 0 deletions
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2005-2019 Rich Felker, et al.
+ *
+ * Part of MUSL, released under the MIT license.
+ */
+
+
+#ifndef _FENV_H_
+#define _FENV_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if __HAVE_68881__ || __mcffpu__
+
+#define FE_INEXACT    8
+#define FE_DIVBYZERO  16
+#define FE_UNDERFLOW  32
+#define FE_OVERFLOW   64
+#define FE_INVALID    128
+
+#define FE_ALL_EXCEPT 0xf8
+
+#define FE_TONEAREST  0
+#define FE_TOWARDZERO 16
+#define FE_DOWNWARD   32
+#define FE_UPWARD     48
+
+#else
+
+#define FE_ALL_EXCEPT 0
+#define FE_TONEAREST  0
+
+#endif
+
+typedef unsigned fexcept_t;
+
+typedef struct {
+	unsigned __control_register, __status_register, __instruction_address;
+} fenv_t;
+
+#define FE_DFL_ENV      ((const fenv_t *) -1)
+
+int feclearexcept(int);
+int fegetexceptflag(fexcept_t *, int);
+int feraiseexcept(int);
+int fesetexceptflag(const fexcept_t *, int);
+int fetestexcept(int);
+
+int fegetround(void);
+int fesetround(int);
+
+int fegetenv(fenv_t *);
+int feholdexcept(fenv_t *);
+int fesetenv(const fenv_t *);
+int feupdateenv(const fenv_t *);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
+
@@ -15,6 +15,8 @@
 #  include <arch/riscv64/fenv.h>
 #elif defined(__sparc__)
 #  include <arch/sparc64/fenv.h>
+#elif defined(__M68K__)
+#  include <arch/m68k/fenv.h>
 #else
 #  error There is no fenv.h for this architecture!
 #endif