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Diffstat (limited to 'sysdeps/m68k/fpu/switch/68881-sw.h')
| -rw-r--r-- | sysdeps/m68k/fpu/switch/68881-sw.h | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/sysdeps/m68k/fpu/switch/68881-sw.h b/sysdeps/m68k/fpu/switch/68881-sw.h deleted file mode 100644 index c5a0f71..0000000 --- a/sysdeps/m68k/fpu/switch/68881-sw.h +++ /dev/null @@ -1,64 +0,0 @@ -/* Copyright (C) 1991, 1992, 1997, 2000 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 _68881_SWITCH_H - -#define _68881_SWITCH_H 1 -#include <sys/cdefs.h> - -/* This is the format of the data at the code label for a function which - wants to switch depending on whether or not a 68881 is present. - - Initially, `insn' is a `jsr' instruction, and `target' is __68881_switch. - The first time such a function is called, __68881_switch determines whether - or not a 68881 is present, and modifies the function accordingly. - Then `insn' is a `jmp' instruction, and `target' is the value of `fpu' - if there is 68881, or the value of `soft' if not. */ - -struct switch_caller - { - unsigned short int insn; /* The `jsr' or `jmp' instruction. */ - void *target; /* The target of the instruction. */ - void *soft; /* The address of the soft function. */ - void *fpu; /* The address of the 68881 function. */ - }; - -/* These are opcodes (values for `insn', above) for `jmp' and `jsr' - instructions, respectively, to 32-bit absolute addresses. */ -#define JMP 0x4ef9 -#define JSR 0x4eb9 - - -/* Function to determine whether or not a 68881 is available, - and modify its caller (which must be a `struct switch_caller', above, - in data space) to use the appropriate version. */ -extern void __68881_switch (int __dummy) __THROW; - - -/* Define FUNCTION as a `struct switch_caller' which will call - `__FUNCTION_68881' if a 68881 is present, and `__FUNCTION_soft' if not. -#define switching_function(FUNCTION) \ - struct switch_caller FUNCTION = \ - { \ - JSR, (__ptr_t) __68881_switch, \ - __CONCAT(__CONCAT(__,FUNCTION),_soft), \ - __CONCAT(__CONCAT(__,FUNCTION),_68881) \ - } - - -#endif /* 68881-switch.h */ |