src/m/amdx86-64.h

   1 /* machine description file for AMD x86-64.
   2    Copyright (C) 2002 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 /* The following line tells the configuration script what sort of
  23    operating system this machine is likely to run.
  24    USUAL-OPSYS="linux"  */
  25
  26 #define BITS_PER_LONG           64
  27 #define BITS_PER_EMACS_INT      64
  28
  29 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  30    is the most significant byte.  */
  31
  32 #undef WORDS_BIG_ENDIAN
  33
  34 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  35  * group of arguments and treat it as an array of the arguments.  */
  36
  37 #define NO_ARG_ARRAY
  38
  39 /* Define WORD_MACHINE if addresses and such have
  40  * to be corrected before they can be used as byte counts.  */
  41
  42 /* #define WORD_MACHINE */
  43
  44 /* Now define a symbol for the cpu type, if your compiler
  45    does not define it automatically:
  46    Ones defined so far include vax, m68000, ns16000, pyramid,
  47    orion, tahoe, APOLLO and many others */
  48 /* __x86_64 defined automatically.  */
  49
  50 /* Use type int rather than a union, to represent Lisp_Object */
  51 /* This is desirable for most machines.  */
  52
  53 #define NO_UNION_TYPE
  54
  55 /* Define the type to use.  */
  56 #define EMACS_INT               long
  57 #define EMACS_UINT              unsigned long
  58 #define SPECIAL_EMACS_INT
  59
  60 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  61    the 24-bit bit field into an int.  In other words, if bit fields
  62    are always unsigned.
  63
  64    If you use NO_UNION_TYPE, this flag does not matter.  */
  65
  66 #define EXPLICIT_SIGN_EXTEND
  67
  68 /* Data type of load average, as read out of kmem.  */
  69
  70 #define LOAD_AVE_TYPE long
  71
  72 /* Convert that into an integer that is 100 for a load average of 1.0  */
  73
  74 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  75
  76 /* Define CANNOT_DUMP on machines where unexec does not work.
  77    Then the function dump-emacs will not be defined
  78    and temacs will do (load "loadup") automatically unless told otherwise.  */
  79
  80 /* #define CANNOT_DUMP */
  81
  82 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  83    pure and impure space as loaded can vary, and even their
  84    relative order cannot be relied on.
  85
  86    Otherwise Emacs assumes that text space precedes data space,
  87    numerically.  */
  88
  89 /* #define VIRT_ADDR_VARIES */
  90
  91 /* Define NO_REMAP if memory segmentation makes it not work well
  92    to change the boundary between the text section and data section
  93    when Emacs is dumped.  If you define this, the preloaded Lisp
  94    code will not be sharable; but that's better than failing completely.  */
  95
  96 /* #define NO_REMAP */
  97
  98 #define PNTR_COMPARISON_TYPE unsigned long
  99
 100 /* On the 64 bit architecture, we can use 60 bits for addresses */
 101
 102 #define VALBITS         60
 103
 104 /* This definition of MARKBIT is necessary because of the comparison of
 105    ARRAY_MARK_FLAG and MARKBIT in an #if in lisp.h, which cpp doesn't like. */
 106
 107 #define MARKBIT         0x8000000000000000L
 108
 109 /* Define XINT and XUINT so that they can take arguments of type int */
 110 #define XINT(a)  (((long) (a) << (BITS_PER_LONG - VALBITS)) >> (BITS_PER_LONG - VALBITS))
 111 #define XUINT(a) ((long) (a) & VALMASK)
 112
 113 /* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
 114
 115 #define XPNTR(a) XUINT (a)
 116
 117 #undef START_FILES
 118 #define START_FILES pre-crt0.o /usr/lib64/crt1.o /usr/lib64/crti.o
 119
 120 #undef LIB_STANDARD
 121 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib64/crtn.o