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author | Ulrich Drepper <drepper@redhat.com> | 1998-07-27 17:55:05 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 1998-07-27 17:55:05 +0000 |
commit | 3f62b69af3f0f61299ac7bcbc7c3b35cbd16cf4a (patch) | |
tree | 325c502561495d94ab29442c1929afd08ac41686 /sysdeps/arm/fpu/fpu_control.h | |
parent | 6730873037b6afad1504bb237399c343cce18451 (diff) | |
download | glibc-3f62b69af3f0f61299ac7bcbc7c3b35cbd16cf4a.tar.gz glibc-3f62b69af3f0f61299ac7bcbc7c3b35cbd16cf4a.tar.xz glibc-3f62b69af3f0f61299ac7bcbc7c3b35cbd16cf4a.zip |
Update.
1998-07-27 17:42 Ulrich Drepper <drepper@cygnus.com> * nss/nss_files/files-parse.c (INT_FIELD): Use strtoul instead of strtol. (INT_FIELD_MAYBE_NULL): Likewise. * posix/globtest.c: Rewrite for extended test suite. * posix/globtest.sh: More tests. Patch by Brian Wellington <bwelling@anomaly.munge.com>. * stdlib/strtol.c: Don't redefine LONG_MAX, LONG_MIN, and ULONG_MAX. Use new macro. * sysdeps/generic/readv.c: Correct return type. * sysdeps/generic/writev.c: Likewise. 1998-07-24 Gordon Matzigkeit <gord@fig.org> * argp/argp-help.c (_GNU_SOURCE): Define, to suck in program_invocation_name when compiling outside of glibc. 1998-07-26 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/arm/siglist.c: New file; ARM tools don't like `@' in .type directives. * sysdeps/libm-ieee754/e_expf.c (__ieee754_expf): Check whether FE_TONEAREST exists for this platform before using it. * sysdeps/libm-ieee754/e_exp.c (__ieee754_exp): Likewise. * sysdeps/arm/dl-machine.h (elf_machine_rel): Delete redundant debugging code. Correct handling of PC24 relocs. * elf/Makefile (ld-map): Only define if versioning is in use. * sysdeps/arm/fpu_control.h: Move to ... * sysdeps/arm/fpu/fpu_control.h: ... here. * sysdeps/generic/fpu_control.h: Made usable as a dummy implementation. * sysdeps/unix/sysv/linux/arm/brk.c: New file. * sysdeps/arm/machine-gmon.h: Improved profiling for ARM. * sysdeps/arm/sysdep.h (CALL_MCOUNT): Replace stub with real implementation. * sysdeps/unix/sysv/linux/arm/clone.S: Likewise. Based on patch from Scott Bambrough and Pat Beirne. * shlib-versions: Add appropriate definitions for ARM machines. * README.template: Mention that Linux/ARM with ELF works now. 1998-07-18 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * Makerules: Generate compilation rules for all object suffixes, not only those currently selected, for sources in the current or object directory. 1998-07-24 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * posix/fnmatch.c (fnmatch): Allow `/' in character class. Don't match `/' in filename by a character class if requested. * posix/testfnm.c: Rewritten. * posix/testfnm.args: Removed. 1998-07-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * posix/annexc.c (limits_syms): Add missing symbols. (stdarg_syms): Move va_list to `maybe' list. (stdio_syms): Add FOPEN_MAX.
Diffstat (limited to 'sysdeps/arm/fpu/fpu_control.h')
-rw-r--r-- | sysdeps/arm/fpu/fpu_control.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/sysdeps/arm/fpu/fpu_control.h b/sysdeps/arm/fpu/fpu_control.h new file mode 100644 index 0000000000..8a2d338c49 --- /dev/null +++ b/sysdeps/arm/fpu/fpu_control.h @@ -0,0 +1,93 @@ +/* FPU control word definitions. ARM version. + Copyright (C) 1996, 1997, 1998 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _FPU_CONTROL_H +#define _FPU_CONTROL_H + +/* We have a slight terminology confusion here. On the ARM, the register + * we're interested in is actually the FPU status word - the FPU control + * word is something different (which is implementation-defined and only + * accessible from supervisor mode.) + * + * The FPSR looks like this: + * + * 31-24 23-16 15-8 7-0 + * | system ID | trap enable | system control | exception flags | + * + * We ignore the system ID bits; for interest's sake they are: + * + * 0000 "old" FPE + * 1000 FPPC hardware + * 0001 FPE 400 + * 1001 FPA hardware + * + * The trap enable and exception flags are both structured like this: + * + * 7 - 5 4 3 2 1 0 + * | reserved | INX | UFL | OFL | DVZ | IVO | + * + * where a `1' bit in the enable byte means that the trap can occur, and + * a `1' bit in the flags byte means the exception has occurred. + * + * The exceptions are: + * + * IVO - invalid operation + * DVZ - divide by zero + * OFL - overflow + * UFL - underflow + * INX - inexact (do not use; implementations differ) + * + * The system control byte looks like this: + * + * 7-5 4 3 2 1 0 + * | reserved | AC | EP | SO | NE | ND | + * + * where the bits mean + * + * ND - no denormalised numbers (force them all to zero) + * NE - enable NaN exceptions + * SO - synchronous operation + * EP - use expanded packed-decimal format + * AC - use alternate definition for C flag on compare operations + */ + +#define _FPU_RESERVED 0xfff0e0f0 /* These bits are reserved. */ + +/* The fdlibm code requires no interrupts for exceptions. Don't + change the rounding mode, it would break long double I/O! */ +#define _FPU_DEFAULT 0x00000000 /* Default value. */ + +/* Type of the control word. */ +typedef unsigned int fpu_control_t; + +/* Macros for accessing the hardware control word. */ +#define _FPU_GETCW(cw) __asm__ ("rfs %0" : "=r" (cw)) +#define _FPU_SETCW(cw) __asm__ ("wfs %0" : : "r" (cw)) + +/* Default control word set at startup. */ +extern fpu_control_t __fpu_control; + +__BEGIN_DECLS + +/* Called at startup. It can be used to manipulate fpu control register. */ +extern void __setfpucw __P ((fpu_control_t)); + +__END_DECLS + +#endif /* _FPU_CONTROL_H */ |