Mercurial > hg > xemacs-beta
view src/alloca.s @ 5038:9410323e4b0d
major dynarr fixes
-------------------- ChangeLog entries follow: --------------------
src/ChangeLog addition:
2010-02-20 Ben Wing <ben@xemacs.org>
* device-x.c (Fx_get_resource):
* dynarr.c:
* dynarr.c (Dynarr_realloc):
* dynarr.c (Dynarr_newf):
* dynarr.c (Dynarr_lisp_realloc):
* dynarr.c (Dynarr_lisp_newf):
* dynarr.c (Dynarr_resize):
* dynarr.c (Dynarr_insert_many):
* dynarr.c (Dynarr_delete_many):
* dynarr.c (Dynarr_memory_usage):
* dynarr.c (stack_like_free):
* file-coding.c (coding_reader):
* file-coding.c (gzip_convert):
* gutter.c (output_gutter):
* lisp.h:
* lisp.h (Dynarr_declare):
* lisp.h (DYNARR_SET_LISP_IMP):
* lisp.h (CHECK_NATNUM):
* profile.c (create_timing_profile_table):
* redisplay-output.c (sync_rune_structs):
* redisplay-output.c (sync_display_line_structs):
* redisplay-output.c (redisplay_output_window):
* redisplay.c:
* redisplay.c (get_display_block_from_line):
* redisplay.c (add_ichar_rune_1):
* redisplay.c (ensure_modeline_generated):
* redisplay.c (generate_displayable_area):
* redisplay.c (regenerate_window):
* redisplay.c (update_line_start_cache):
* signal.c:
* signal.c (check_quit):
Lots of rewriting of dynarr code.
(1) Lots of documentation added. Also fix places that
referenced a now-bogus internals node concerning redisplay
critical sections.
(2) Rename:
Dynarr_add_lisp_string -> Dynarr_add_ext_lisp_string
Dynarr_set_length -> Dynarr_set_lengthr ("restricted")
Dynarr_increment -> Dynarr_incrementr
Dynarr_resize_if -> Dynarr_resize_to_add
(3) New functions:
Dynarr_elsize = dy->elsize_
Dynarr_set_length(): Set length, resizing as necessary
Dynarr_set_length_and_zero(): Set length, resizing as necessary,
zeroing out new elements
Dynarr_increase_length(), Dynarr_increase_length_and_zero():
Optimization of Dynarr_set_length(), Dynarr_set_length_and_zero()
when size is known to increase
Dynarr_resize_to_fit(): Resize as necessary to fit a given length.
Dynarr_set(): Set element at a given position, increasing length
as necessary and setting any newly created positions to 0
(4) Use Elemcount, Bytecount.
(5) Rewrite many macros as inline functions.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Sat, 20 Feb 2010 03:46:22 -0600 |
| parents | aa5ed11f473b |
| children | 308d34e9f07d |
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/* `alloca' standard 4.2 subroutine for 68000's and 16000's and others. Copyright (C) 1985, 1986, 1988 Free Software Foundation, Inc. This file is part of XEmacs. XEmacs is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. XEmacs 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 General Public License for more details. You should have received a copy of the GNU General Public License along with XEmacs; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Synched up with: FSF 19.30. */ /* Both 68000 systems I have run this on have had broken versions of alloca. Also, I am told that non-berkeley systems do not have it at all. So replace whatever system-provided alloca there may be on all 68000 systems. */ #define NOT_C_CODE #ifdef emacs #include <config.h> #else #include "config.h" #endif #ifndef HAVE_ALLOCA /* define this to use system's alloca */ #ifndef m68k #ifndef m68000 you lose!! #endif /* m68000 */ #endif /* m68k */ #ifdef m68k /* SGS assembler totally different */ file "alloca.s" global alloca alloca: mov.l (%sp)+,%a1 # pop return addr from top of stack mov.l (%sp)+,%d0 # pop size in bytes from top of stack add.l &R%1,%d0 # round size up to long word and.l &-4,%d0 # mask out lower two bits of size sub.l %d0,%sp # allocate by moving stack pointer tst.b P%1(%sp) # stack probe to allocate pages mov.l %sp,%a0 # return pointer as pointer mov.l %sp,%d0 # return pointer as int to avoid disaster add.l &-4,%sp # new top of stack jmp (%a1) # not a normal return set S%1,64 # safety factor for C compiler scratch set R%1,3+S%1 # add to size for rounding set P%1,-132 # probe this far below current top of stack #else /* not m68k */ #ifdef m68000 /* Some systems want the _, some do not. Win with both kinds. */ .globl _alloca _alloca: .globl alloca alloca: movl sp@+,a0 movl a7,d0 subl sp@,d0 andl #~3,d0 movl d0,sp tstb sp@(0) /* Make stack pages exist */ /* Needed on certain systems that lack true demand paging */ addql #4,d0 jmp a0@ #endif /* m68000 */ #endif /* not m68k */ #endif /* not HAVE_ALLOCA */