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annotate lwasm/pass3.c @ 362:d149e2b56981

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Silence tautological comparison warnings Because "char" may be signed or unsigned depending on the system, comparing for byte values 128...255 has to be forced as an unsigned comparison to be portable and clear. Modify two such comparisons in the symbol handling code to treat the symbol offset as a pointer to unsigned. This quiets tautological comparison warnings on systems with an 8 bit signed type as the default char type.
author William Astle <lost@l-w.ca>
date Tue, 26 May 2015 23:42:00 -0600
parents 697bc543368c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 /*
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2 pass3.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #include <stdio.h>
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23 #include <string.h>
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24
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25 #include <lw_alloc.h>
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26 #include <lw_string.h>
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27
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28 #include "lwasm.h"
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29 #include "instab.h"
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30
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31 /*
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32 Resolve1 Pass
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33
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34 repeatedly resolve instruction sizes and line addresses
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35 until nothing more reduces
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36
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37 */
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38 void do_pass3(asmstate_t *as)
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39 {
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40 int rc;
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41 line_t *cl;
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42 struct line_expr_s *le;
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43
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44 do
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45 {
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46 rc = 0;
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47 for (cl = as -> line_head; cl; cl = cl -> next)
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48 {
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49 as -> cl = cl;
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50
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51 // simplify address
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52 lwasm_reduce_expr(as, cl -> addr);
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53
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54 // simplify data address
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55 lwasm_reduce_expr(as, cl -> daddr);
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56
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57 // simplify each expression
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58 for (le = cl -> exprs; le; le = le -> next)
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59 lwasm_reduce_expr(as, le -> expr);
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60
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61 if (cl -> len == -1 || cl -> dlen == -1)
0
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62 {
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63 // try resolving the instruction length
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64 // but don't force resolution
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65 if (cl -> insn >= 0 && instab[cl -> insn].resolve)
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66 {
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67 (instab[cl -> insn].resolve)(as, cl, 0);
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68 debug_message(as, 100, "len = %d, dlen = %d", cl -> len, cl -> dlen);
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69 if ((cl -> inmod == 0) && cl -> len >= 0 && cl -> dlen >= 0)
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70 {
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71 if (cl -> len == 0)
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72 cl -> len = cl -> dlen;
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73 else
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74 cl -> dlen = cl -> len;
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75 }
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76 if (cl -> len != -1 && cl -> dlen != -1)
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77 rc++;
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78 }
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79 }
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80 }
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81 if (as -> errorcount > 0)
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82 return;
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83 } while (rc > 0);
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84 }