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1998-11-26 Ulrich Drepper <drepper@cygnus.com> * sysdeps/mips/dl-machine.h (ELF_MACHINE_NO_PLT): New defined macro. (elf_machine_got_rel): Remove scope variable. Use scope from the map. Don't modify _dl_global_scope_end in the end. (__dl_runtime_resolv): Also use scope from the map. * sysdeps/mips/mips64/dl-machine.h: Likewise. * elf/dl-runtime.c: Don't define fixup and profile_fixup if ELF_MACHINE_NO_PLT is defined. * sysdeps/mips/sys/ucontext.h: New file. Patches by kaz Kojima <kkojima@rr.iij4u.or.jp>. 1998-11-26 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/generic/pselect.c (__pselect): Change interface, set/restore sigmask. * misc/sys/select.h: Change declaration according to Stevens' Unix Network Programming. * include/sys/select.h (__pselect): Likewise. Reported by <bwelling@anomaly.munge.com> [PR libc/872]. * include/fpu_control.h: New file, contains __setfpucw declaration. * sysdeps/generic/fpu_control.h: Remove __setfpucw declaration, it's an internal symbol. * sysdeps/alpha/fpu/fpu_control.h: Likewise. * sysdeps/arm/fpu/fpu_control.h: Likewise. * sysdeps/i386/fpu_control.h: Likewise. * sysdeps/m68k/fpu_control.h: Likewise. * sysdeps/powerpc/fpu_control.h: Likewise. * sysdeps/sparc/sparc32/fpu/fpu_control.h: Likewise. * sysdeps/sparc/sparc64/fpu/fpu_control.h: Likewise.
102 lines
3.3 KiB
C
102 lines
3.3 KiB
C
/* 68k FPU control word definitions.
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Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _FPU_CONTROL_H
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#define _FPU_CONTROL_H
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/*
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* Motorola floating point control register bits.
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*
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* 31-16 -> reserved (read as 0, ignored on write)
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* 15 -> enable trap for BSUN exception
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* 14 -> enable trap for SNAN exception
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* 13 -> enable trap for OPERR exception
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* 12 -> enable trap for OVFL exception
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* 11 -> enable trap for UNFL exception
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* 10 -> enable trap for DZ exception
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* 9 -> enable trap for INEX2 exception
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* 8 -> enable trap for INEX1 exception
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* 7-6 -> Precision Control
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* 5-4 -> Rounding Control
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* 3-0 -> zero (read as 0, write as 0)
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*
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*
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* Precision Control:
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* 00 - round to extended precision
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* 01 - round to single precision
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* 10 - round to double precision
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* 11 - undefined
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*
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* Rounding Control:
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* 00 - rounding to nearest (RN)
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* 01 - rounding toward zero (RZ)
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* 10 - rounding (down)toward minus infinity (RM)
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* 11 - rounding (up) toward plus infinity (RP)
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*
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* The hardware default is 0x0000. I choose 0x5400.
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*/
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#include <features.h>
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/* masking of interrupts */
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#define _FPU_MASK_BSUN 0x8000
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#define _FPU_MASK_SNAN 0x4000
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#define _FPU_MASK_OPERR 0x2000
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#define _FPU_MASK_OVFL 0x1000
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#define _FPU_MASK_UNFL 0x0800
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#define _FPU_MASK_DZ 0x0400
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#define _FPU_MASK_INEX1 0x0200
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#define _FPU_MASK_INEX2 0x0100
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/* precision control */
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#define _FPU_EXTENDED 0x00 /* RECOMMENDED */
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#define _FPU_DOUBLE 0x80
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#define _FPU_SINGLE 0x40 /* DO NOT USE */
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/* rounding control */
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#define _FPU_RC_NEAREST 0x00 /* RECOMMENDED */
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#define _FPU_RC_ZERO 0x10
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#define _FPU_RC_DOWN 0x20
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#define _FPU_RC_UP 0x30
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#define _FPU_RESERVED 0xFFFF000F /* Reserved bits in fpucr */
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/* Now two recommended fpucr */
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/* The fdlibm code requires no interrupts for exceptions. Don't
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change the rounding mode, it would break long double I/O! */
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#define _FPU_DEFAULT 0x00000000
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/* IEEE: same as above, but exceptions. We must make it non-zero so
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that __setfpucw works. This bit will be ignored. */
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#define _FPU_IEEE 0x00000001
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/* Type of the control word. */
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typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
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/* Macros for accessing the hardware control word. */
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#define _FPU_GETCW(cw) __asm__ ("fmove%.l %!, %0" : "=dm" (cw))
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#define _FPU_SETCW(cw) __asm__ volatile ("fmove%.l %0, %!" : : "dm" (cw))
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/* Default control word set at startup. */
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extern fpu_control_t __fpu_control;
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#endif /* _M68K_FPU_CONTROL_H */
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