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view src/alloca.s @ 5168:cf900a2f1fa3
extract gap array from extents.c, use in range tables
-------------------- ChangeLog entries follow: --------------------
src/ChangeLog addition:
2010-03-22 Ben Wing <ben@xemacs.org>
* Makefile.in.in (objs):
* array.c:
* array.c (gap_array_adjust_markers):
* array.c (gap_array_move_gap):
* array.c (gap_array_make_gap):
* array.c (gap_array_insert_els):
* array.c (gap_array_delete_els):
* array.c (gap_array_make_marker):
* array.c (gap_array_delete_marker):
* array.c (gap_array_delete_all_markers):
* array.c (gap_array_clone):
* array.h:
* depend:
* emacs.c (main_1):
* extents.c:
* extents.c (EXTENT_GAP_ARRAY_AT):
* extents.c (extent_list_num_els):
* extents.c (extent_list_locate):
* extents.c (extent_list_at):
* extents.c (extent_list_delete_all):
* extents.c (allocate_extent_list):
* extents.c (syms_of_extents):
* extents.h:
* extents.h (XEXTENT_LIST_MARKER):
* lisp.h:
* rangetab.c:
* rangetab.c (mark_range_table):
* rangetab.c (print_range_table):
* rangetab.c (range_table_equal):
* rangetab.c (range_table_hash):
* rangetab.c (verify_range_table):
* rangetab.c (get_range_table_pos):
* rangetab.c (Fmake_range_table):
* rangetab.c (Fcopy_range_table):
* rangetab.c (Fget_range_table):
* rangetab.c (put_range_table):
* rangetab.c (Fclear_range_table):
* rangetab.c (Fmap_range_table):
* rangetab.c (unified_range_table_bytes_needed):
* rangetab.c (unified_range_table_copy_data):
* rangetab.c (unified_range_table_lookup):
* rangetab.h:
* rangetab.h (struct range_table_entry):
* rangetab.h (struct Lisp_Range_Table):
* rangetab.h (rangetab_gap_array_at):
* symsinit.h:
Rename dynarr.c to array.c. Move gap array from extents.c to array.c.
Extract dynarr, gap array and stack-like malloc into new file array.h.
Rename GAP_ARRAY_NUM_ELS -> gap_array_length(). Add gap_array_at(),
gap_array_atp().
Rewrite range table code to use gap arrays. Make put_range_table()
smarter so that its operation is O(log n) for adding a localized
range.
* gc.c (lispdesc_block_size_1):
Don't ABORT() when two elements are located at the same place.
This will happen with a size-0 gap array -- both parts of the array
(before and after gap) are in the same place.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Mon, 22 Mar 2010 19:12:15 -0500 |
| parents | aa5ed11f473b |
| children | 308d34e9f07d |
line wrap: on
line source
/* `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 */