[8833] | 1 | /* Generate code to initialize optabs from machine description. |
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| 2 | Copyright (C) 1993, 1994 Free Software Foundation, Inc. |
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| 3 | |
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| 4 | This file is part of GNU CC. |
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| 5 | |
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| 6 | GNU CC is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 2, or (at your option) |
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| 9 | any later version. |
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| 10 | |
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| 11 | GNU CC is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with GNU CC; see the file COPYING. If not, write to |
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| 18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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| 19 | Boston, MA 02111-1307, USA. */ |
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| 20 | |
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| 21 | |
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| 22 | #include <stdio.h> |
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| 23 | #include "hconfig.h" |
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| 24 | #include "rtl.h" |
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| 25 | #include "obstack.h" |
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| 26 | #include <ctype.h> |
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| 27 | |
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| 28 | static struct obstack obstack; |
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| 29 | struct obstack *rtl_obstack = &obstack; |
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| 30 | |
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| 31 | #define obstack_chunk_alloc xmalloc |
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| 32 | #define obstack_chunk_free free |
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| 33 | |
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| 34 | extern void free (); |
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| 35 | extern rtx read_rtx (); |
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| 36 | |
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| 37 | char *xmalloc (); |
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| 38 | static void fatal (); |
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| 39 | void fancy_abort (); |
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| 40 | |
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| 41 | /* Many parts of GCC use arrays that are indexed by machine mode and |
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| 42 | contain the insn codes for pattern in the MD file that perform a given |
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| 43 | operation on operands of that mode. |
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| 44 | |
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| 45 | These patterns are present in the MD file with names that contain |
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| 46 | the mode(s) used and the name of the operation. This program |
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| 47 | writes a function `init_all_optabs' that initializes the optabs with |
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| 48 | all the insn codes of the relevant patterns present in the MD file. |
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| 49 | |
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| 50 | This array contains a list of optabs that need to be initialized. Within |
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| 51 | each string, the name of the pattern to be matched against is delimited |
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| 52 | with %( and %). In the string, %a and %b are used to match a short mode |
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| 53 | name (the part of the mode name not including `mode' and converted to |
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| 54 | lower-case). When writing out the initializer, the entire string is |
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| 55 | used. %A and %B are replaced with the full name of the mode; %a and %b |
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| 56 | are replaced with the short form of the name, as above. |
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| 57 | |
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| 58 | If %N is present in the pattern, it means the two modes must be consecutive |
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| 59 | widths in the same mode class (e.g, QImode and HImode). %I means that |
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| 60 | only integer modes should be considered for the next mode, and %F means |
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| 61 | that only float modes should be considered. |
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| 62 | |
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| 63 | For some optabs, we store the operation by RTL codes. These are only |
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| 64 | used for comparisons. In that case, %c and %C are the lower-case and |
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| 65 | upper-case forms of the comparison, respectively. */ |
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| 66 | |
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| 67 | /* The reason we use \% is to avoid sequences of the form %-capletter-% |
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| 68 | which SCCS treats as magic. This gets warnings which you should ignore. */ |
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| 69 | |
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| 70 | char *optabs[] = |
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| 71 | { "extendtab[(int) %B][(int) %A][0] = CODE_FOR_%(extend%a\%b2%)", |
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| 72 | "extendtab[(int) %B][(int) %A][1] = CODE_FOR_%(zero_extend%a\%b2%)", |
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| 73 | "fixtab[(int) %A][(int) %B][0] = CODE_FOR_%(fix%F\%a%I\%b2%)", |
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| 74 | "fixtab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns%F\%a%b2%)", |
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| 75 | "fixtrunctab[(int) %A][(int) %B][0] = CODE_FOR_%(fix_trunc%F\%a%I\%b2%)", |
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| 76 | "fixtrunctab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns_trunc%F\%a%I\%b2%)", |
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| 77 | "floattab[(int) %B][(int) %A][0] = CODE_FOR_%(float%I\%a%F\%b2%)", |
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| 78 | "floattab[(int) %B][(int) %A][1] = CODE_FOR_%(floatuns%I\%a%F\%b2%)", |
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| 79 | "add_optab->handlers[(int) %A].insn_code = CODE_FOR_%(add%a3%)", |
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| 80 | "sub_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sub%a3%)", |
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| 81 | "smul_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mul%a3%)", |
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| 82 | "umul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umul%a3_highpart%)", |
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| 83 | "smul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smul%a3_highpart%)", |
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| 84 | "smul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(mul%a%b3%)%N", |
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| 85 | "umul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(umul%a%b3%)%N", |
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| 86 | "sdiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%I\%a3%)", |
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| 87 | "udiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udiv%I\%a3%)", |
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| 88 | "sdivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(divmod%a4%)", |
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| 89 | "udivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udivmod%a4%)", |
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| 90 | "smod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mod%a3%)", |
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| 91 | "umod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umod%a3%)", |
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| 92 | "flodiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%F\%a3%)", |
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| 93 | "ftrunc_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ftrunc%F\%a2%)", |
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| 94 | "and_optab->handlers[(int) %A].insn_code = CODE_FOR_%(and%a3%)", |
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| 95 | "ior_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ior%a3%)", |
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| 96 | "xor_optab->handlers[(int) %A].insn_code = CODE_FOR_%(xor%a3%)", |
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| 97 | "ashl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashl%a3%)", |
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| 98 | "ashr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashr%a3%)", |
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| 99 | "lshr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(lshr%a3%)", |
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| 100 | "rotl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotl%a3%)", |
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| 101 | "rotr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotr%a3%)", |
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| 102 | "smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smin%I\%a3%)", |
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| 103 | "smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(min%F\%a3%)", |
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| 104 | "smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smax%I\%a3%)", |
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| 105 | "smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(max%F\%a3%)", |
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| 106 | "umin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umin%I\%a3%)", |
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| 107 | "umax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umax%I\%a3%)", |
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| 108 | "neg_optab->handlers[(int) %A].insn_code = CODE_FOR_%(neg%a2%)", |
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| 109 | "abs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(abs%a2%)", |
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| 110 | "sqrt_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sqrt%a2%)", |
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| 111 | "sin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sin%a2%)", |
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| 112 | "cos_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cos%a2%)", |
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| 113 | "strlen_optab->handlers[(int) %A].insn_code = CODE_FOR_%(strlen%a%)", |
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| 114 | "one_cmpl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(one_cmpl%a2%)", |
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| 115 | "ffs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ffs%a2%)", |
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| 116 | "mov_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mov%a%)", |
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| 117 | "movstrict_optab->handlers[(int) %A].insn_code = CODE_FOR_%(movstrict%a%)", |
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| 118 | "cmp_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cmp%a%)", |
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| 119 | "tst_optab->handlers[(int) %A].insn_code = CODE_FOR_%(tst%a%)", |
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| 120 | "bcc_gen_fctn[(int) %C] = gen_%(b%c%)", |
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| 121 | "setcc_gen_code[(int) %C] = CODE_FOR_%(s%c%)", |
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| 122 | "movcc_gen_code[(int) %A] = CODE_FOR_%(mov%acc%)", |
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| 123 | "reload_in_optab[(int) %A] = CODE_FOR_%(reload_in%a%)", |
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| 124 | "reload_out_optab[(int) %A] = CODE_FOR_%(reload_out%a%)", |
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| 125 | "movstr_optab[(int) %A] = CODE_FOR_%(movstr%a%)" }; |
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| 126 | |
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| 127 | /* Allow linking with print-rtl.c. */ |
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| 128 | char **insn_name_ptr; |
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| 129 | |
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| 130 | static void |
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| 131 | gen_insn (insn) |
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| 132 | rtx insn; |
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| 133 | { |
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| 134 | char *name = XSTR (insn, 0); |
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| 135 | int m1, m2, op; |
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| 136 | int pindex; |
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| 137 | int i; |
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| 138 | char *np, *pp, *p, *q; |
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| 139 | struct obstack *obstack_ptr; |
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| 140 | |
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| 141 | /* Don't mention instructions whose names are the null string. |
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| 142 | They are in the machine description just to be recognized. */ |
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| 143 | if (*name == 0) |
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| 144 | return; |
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| 145 | |
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| 146 | /* See if NAME matches one of the patterns we have for the optabs we know |
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| 147 | about. */ |
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| 148 | |
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| 149 | for (pindex = 0; pindex < sizeof optabs / sizeof optabs[0]; pindex++) |
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| 150 | { |
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| 151 | int force_float = 0, force_int = 0; |
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| 152 | int force_consec = 0; |
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| 153 | int matches = 1; |
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| 154 | |
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| 155 | for (pp = optabs[pindex]; pp[0] != '%' || pp[1] != '('; pp++) |
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| 156 | ; |
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| 157 | |
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| 158 | for (pp += 2, np = name; matches && ! (pp[0] == '%' && pp[1] == ')'); |
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| 159 | pp++) |
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| 160 | { |
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| 161 | if (*pp != '%') |
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| 162 | { |
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| 163 | if (*pp != *np++) |
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| 164 | break; |
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| 165 | } |
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| 166 | else |
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| 167 | switch (*++pp) |
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| 168 | { |
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| 169 | case 'N': |
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| 170 | force_consec = 1; |
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| 171 | break; |
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| 172 | case 'I': |
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| 173 | force_int = 1; |
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| 174 | break; |
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| 175 | case 'F': |
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| 176 | force_float = 1; |
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| 177 | break; |
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| 178 | case 'c': |
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| 179 | for (op = 0; op < NUM_RTX_CODE; op++) |
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| 180 | { |
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| 181 | for (p = rtx_name[op], q = np; *p; p++, q++) |
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| 182 | if (*p != *q) |
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| 183 | break; |
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| 184 | |
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| 185 | /* We have to be concerned about matching "gt" and |
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| 186 | missing "gtu", e.g., so verify we have reached the |
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| 187 | end of thing we are to match. We do not have this |
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| 188 | problem with modes since no mode is a prefix of |
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| 189 | another. */ |
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| 190 | if (*p == 0 && *q == 0 && rtx_class[op] == '<') |
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| 191 | break; |
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| 192 | } |
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| 193 | |
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| 194 | if (op == NUM_RTX_CODE) |
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| 195 | matches = 0; |
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| 196 | else |
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| 197 | np += strlen (rtx_name[op]); |
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| 198 | break; |
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| 199 | case 'a': |
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| 200 | case 'b': |
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| 201 | for (i = 0; i < (int) MAX_MACHINE_MODE; i++) |
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| 202 | { |
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| 203 | for (p = mode_name[i], q = np; *p; p++, q++) |
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| 204 | if (tolower (*p) != *q) |
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| 205 | break; |
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| 206 | |
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| 207 | if (*p == 0 |
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| 208 | && (! force_int || mode_class[i] == MODE_INT) |
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| 209 | && (! force_float || mode_class[i] == MODE_FLOAT)) |
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| 210 | break; |
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| 211 | } |
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| 212 | |
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| 213 | if (i == (int) MAX_MACHINE_MODE) |
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| 214 | matches = 0; |
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| 215 | else if (*pp == 'a') |
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| 216 | m1 = i, np += strlen (mode_name[i]); |
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| 217 | else |
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| 218 | m2 = i, np += strlen (mode_name[i]); |
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| 219 | |
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| 220 | force_int = force_float = 0; |
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| 221 | break; |
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| 222 | |
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| 223 | default: |
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| 224 | abort (); |
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| 225 | } |
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| 226 | } |
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| 227 | |
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| 228 | if (matches && pp[0] == '%' && pp[1] == ')' |
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| 229 | && *np == 0 |
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| 230 | && (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2)) |
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| 231 | break; |
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| 232 | } |
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| 233 | |
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| 234 | if (pindex == sizeof optabs / sizeof optabs[0]) |
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| 235 | return; |
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| 236 | |
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| 237 | /* We found a match. If this pattern is only conditionally present, |
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| 238 | write out the "if" and two extra blanks. */ |
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| 239 | |
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| 240 | if (*XSTR (insn, 2) != 0) |
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| 241 | printf (" if (HAVE_%s)\n ", name); |
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| 242 | |
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| 243 | printf (" "); |
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| 244 | |
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| 245 | /* Now write out the initialization, making all required substitutions. */ |
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| 246 | for (pp = optabs[pindex]; *pp; pp++) |
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| 247 | { |
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| 248 | if (*pp != '%') |
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| 249 | printf ("%c", *pp); |
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| 250 | else |
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| 251 | switch (*++pp) |
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| 252 | { |
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| 253 | case '(': case ')': |
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| 254 | case 'I': case 'F': case 'N': |
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| 255 | break; |
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| 256 | case 'a': |
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| 257 | for (np = mode_name[m1]; *np; np++) |
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| 258 | printf ("%c", tolower (*np)); |
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| 259 | break; |
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| 260 | case 'b': |
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| 261 | for (np = mode_name[m2]; *np; np++) |
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| 262 | printf ("%c", tolower (*np)); |
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| 263 | break; |
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| 264 | case 'A': |
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| 265 | printf ("%smode", mode_name[m1]); |
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| 266 | break; |
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| 267 | case 'B': |
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| 268 | printf ("%smode", mode_name[m2]); |
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| 269 | break; |
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| 270 | case 'c': |
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| 271 | printf ("%s", rtx_name[op]); |
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| 272 | break; |
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| 273 | case 'C': |
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| 274 | for (np = rtx_name[op]; *np; np++) |
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| 275 | printf ("%c", toupper (*np)); |
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| 276 | break; |
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| 277 | } |
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| 278 | } |
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| 279 | |
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| 280 | printf (";\n"); |
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| 281 | } |
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| 282 | |
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| 283 | char * |
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| 284 | xmalloc (size) |
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| 285 | unsigned size; |
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| 286 | { |
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| 287 | register char *val = (char *) malloc (size); |
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| 288 | |
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| 289 | if (val == 0) |
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| 290 | fatal ("virtual memory exhausted"); |
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| 291 | |
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| 292 | return val; |
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| 293 | } |
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| 294 | |
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| 295 | char * |
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| 296 | xrealloc (ptr, size) |
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| 297 | char *ptr; |
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| 298 | unsigned size; |
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| 299 | { |
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| 300 | char *result = (char *) realloc (ptr, size); |
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| 301 | if (!result) |
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| 302 | fatal ("virtual memory exhausted"); |
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| 303 | return result; |
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| 304 | } |
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| 305 | |
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| 306 | static void |
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| 307 | fatal (s, a1, a2) |
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| 308 | char *s; |
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| 309 | { |
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| 310 | fprintf (stderr, "genopinit: "); |
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| 311 | fprintf (stderr, s, a1, a2); |
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| 312 | fprintf (stderr, "\n"); |
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| 313 | exit (FATAL_EXIT_CODE); |
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| 314 | } |
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| 315 | |
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| 316 | /* More 'friendly' abort that prints the line and file. |
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| 317 | config.h can #define abort fancy_abort if you like that sort of thing. */ |
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| 318 | |
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| 319 | void |
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| 320 | fancy_abort () |
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| 321 | { |
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| 322 | fatal ("Internal gcc abort."); |
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| 323 | } |
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| 324 | |
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| 325 | int |
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| 326 | main (argc, argv) |
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| 327 | int argc; |
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| 328 | char **argv; |
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| 329 | { |
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| 330 | rtx desc; |
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| 331 | rtx dummy; |
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| 332 | rtx *insn_ptr; |
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| 333 | FILE *infile; |
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| 334 | register int c; |
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| 335 | |
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| 336 | obstack_init (rtl_obstack); |
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| 337 | |
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| 338 | if (argc <= 1) |
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| 339 | fatal ("No input file name."); |
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| 340 | |
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| 341 | infile = fopen (argv[1], "r"); |
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| 342 | if (infile == 0) |
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| 343 | { |
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| 344 | perror (argv[1]); |
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| 345 | exit (FATAL_EXIT_CODE); |
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| 346 | } |
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| 347 | |
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| 348 | init_rtl (); |
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| 349 | |
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| 350 | printf ("/* Generated automatically by the program `genopinit'\n\ |
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| 351 | from the machine description file `md'. */\n\n"); |
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| 352 | |
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| 353 | printf ("#include \"config.h\"\n"); |
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| 354 | printf ("#include \"rtl.h\"\n"); |
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| 355 | printf ("#include \"flags.h\"\n"); |
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| 356 | printf ("#include \"insn-flags.h\"\n"); |
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| 357 | printf ("#include \"insn-codes.h\"\n"); |
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| 358 | printf ("#include \"insn-config.h\"\n"); |
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| 359 | printf ("#include \"recog.h\"\n"); |
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| 360 | printf ("#include \"expr.h\"\n"); |
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| 361 | printf ("#include \"reload.h\"\n\n"); |
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| 362 | |
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| 363 | printf ("void\ninit_all_optabs ()\n{\n"); |
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| 364 | |
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| 365 | /* Read the machine description. */ |
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| 366 | |
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| 367 | while (1) |
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| 368 | { |
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| 369 | c = read_skip_spaces (infile); |
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| 370 | if (c == EOF) |
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| 371 | break; |
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| 372 | ungetc (c, infile); |
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| 373 | |
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| 374 | desc = read_rtx (infile); |
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| 375 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) |
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| 376 | gen_insn (desc); |
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| 377 | } |
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| 378 | |
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| 379 | printf ("}\n"); |
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| 380 | |
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| 381 | fflush (stdout); |
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| 382 | exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |
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| 383 | /* NOTREACHED */ |
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| 384 | return 0; |
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| 385 | } |
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