2012-02-26 Andreas Schwab <schwab@linux-m68k.org>
+ * sysdeps/m68k/m680x0/fpu/Makefile: Remove.
+ * sysdeps/m68k/m680x0/fpu/switch: Remove directory.
+
* sysdeps/m68k/m680x0/fpu/k_sinl.c: Replace by empty file.
* sysdeps/m68k/m680x0/fpu/k_cosl.c: Likewise.
* sysdeps/m68k/m680x0/fpu/k_tanf.c: Likewise.
+++ /dev/null
-ifeq ($(subdir),math)
-ifndef math-twiddled
-
-# Avoid twiddling in generic/Makefile.
-math-twiddled := t
-
-endif
-
-bsdmath_dirs := $(bsdmath_dirs) mc68881
-
-endif
+++ /dev/null
-/* 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 */
+++ /dev/null
-# Copyright (C) 1991, 1992, 1997 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.
-
-ifeq ($(subdir),math)
-
-sysdep_routines := $(sysdep_routines) switch
-
-# Find all the sources that have 68881 versions.
-+68881-sources := \
- $(notdir $(wildcard $(addprefix $(filter %/fpu,$(sysdirs)),$(sources))))
-
-# Sysdep directories other than fpu and fpu/switch (this one).
-+non68881-dirs := $(filter-out %/fpu %/fpu/switch,$(+sysdep_dirs))
-
-# Get a non-68881 version of the target.
-+non68881-version = $(firstword $(wildcard $(addsuffix /$@,$(+non68881-dirs))))
-
-# Directory containing 68881 sources.
-+68881-dir := $(filter %/fpu,$(+sysdep_dirs))
-
-# For all the files that have 68881 versions and don't exist already in
-# the source directory (math), automatically make ones that switch between
-# 68881 and soft versions.
-$(addprefix $(objpfx), \
- $(filter-out $(wildcard $(+68881-sources)),$(+68881-sources))):
- (echo '#include <68881-sw.h>' ;\
- echo '#define $* __$*_68881' ;\
- echo '#include <$(+68881-dir)/$@>' ;\
- echo '#undef $*' ;\
- echo '#define $* __$*_soft' ;\
- echo '#include <$(non68881-version)>' ;\
- echo '#undef $*' ;\
- echo 'switching_function($*);') > $@-tmp
- mv $@-tmp $@
-
-endif
+++ /dev/null
-/* We don't want any inlines when we might not have a 68881. */
+++ /dev/null
-/* Copyright (C) 1991, 1992, 1997 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. */
-
-#include <signal.h>
-#include <68881-sw.h>
-
-
-/* The signal that is sent when a 68881 instruction
- is executed and there is no 68881. */
-#ifndef TRAPSIG
-#define TRAPSIG SIGILL
-#endif
-
-/* Zero if no 68881, one if we have a 68881, or -1 if we don't know yet. */
-static int have_fpu = -1;
-
-
-/* Signal handler for the trap that happens if we don't have a 68881. */
-static void
-trap (sig)
- int sig;
-{
- have_fpu = 0;
-}
-
-/* This function is called by functions that want to switch.
- The calling function must be a `struct switch_caller' in data space.
- It determines whether a 68881 is present, and modifies its caller
- to be a static jump to either the 68881 version or the soft version.
- It then returns into the function it has chosen to do the work. */
-void
-__68881_switch (dummy)
- int dummy;
-{
- void **return_address_location = &((void **) &dummy)[-1];
- struct switch_caller *const caller
- = (struct switch_caller *) (((short int *) *return_address_location) - 1);
-
- if (have_fpu < 0)
- {
- /* Figure out whether or not we have a 68881. */
- __sighandler_t handler = signal (TRAPSIG, trap);
- if (handler == SIG_ERR)
- /* We can't figure it out, so assume we don't have a 68881.
- This assumption will never cause us any problems other than
- lost performance, while the reverse assumption could cause
- the program to crash. */
- have_fpu = 0;
- else
- {
- /* We set `have_fpu' to nonzero, and then execute a 68881
- no-op instruction. If we have a 68881, this will do nothing.
- If we don't have one, this will trap and the signal handler
- will clear `have_fpu'. */
- have_fpu = 1;
- asm ("fnop");
-
- /* Restore the old signal handler. */
- (void) signal (TRAPSIG, handler);
- }
- }
-
- /* Modify the caller to be a jump to the appropriate address. */
- caller->insn = JMP;
- caller->target = have_fpu ? caller->fpu : caller->soft;
-
- /* Make the address we will return to be the target we have chosen.
- Our return will match the `jsr' done by the caller we have
- just modified, and it will be just as if that had instead
- been a `jmp' to the new target. */
- *return_address_location = caller->target;
-}
projects / platform / upstream / glibc.git / commitdiff