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Fix cycle counting for relative branches. The original creator of the cycle counting code appears to have mangled two different approaches to counting the cycles for relative branches into the final product which led to counting too many cycles for the branch instructions. The comments in the cycle table were correct but the code was doing some incorrect things. Also add the missing LBRN entry to the cycle table. The one labelled LBRN was not, in fact, LBRN, but one of the actual useful branch instructions.
author William Astle <lost@l-w.ca>
date Thu, 03 Mar 2016 21:38:21 -0700
parents f5a88f147fae
children c41d72a58ef6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/bin/sh
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2 #
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3 # Copyright 2009 by William Astle <lost@l-w.ca>
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4 #
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5 #This file is part of LWASM.
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6 #
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7 #LWASM is free software: you can redistribute it and/or modify it under the
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8 #terms of the GNU General Public License as published by the Free Software
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9 #Foundation, either version 3 of the License, or (at your option) any later
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10 #version.
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11 #
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12 #This program is distributed in the hope that it will be useful, but WITHOUT
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13 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 #FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 #more details.
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16 #
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17 #You should have received a copy of the GNU General Public License along with
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18 #this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 # this was based somewhat on the "as" script from gcc6809
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21
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22 #echo "LWASM-as $0 $*"
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23
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24 show_version () {
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25 cat <<END
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26 LWASM (GNU assembler frontend) 2.3
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27 This program is free software; you may redistribute it under the terms of
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28 the GNU General Public License. This program has absolutely no warranty.
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29 END
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30 }
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31
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32 fatal_error () {
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33 echo $* 1>&2
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34 exit 1
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35 }
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36
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37 # Assume nothing.
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38
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39 input_file=
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40 output_file=
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41 list_file=
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42 options=
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43 list_file_enabled=n
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44
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45 # Parse the command-line options. See the GNU 'as' man page for
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46 # an explanation of all these options. Our goal is to translate
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47 # them into lwasm form.
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48
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49 while [ "$1" != "" ]; do
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50 arg=$1; shift
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51 case $arg in
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52 -m6809)
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53 true
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54 ;;
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55 -gn)
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56 # Generate NoICE debug symbols
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57 # ignored - no output formats support debugging symbols
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58 ;;
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59 -gs)
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60 # Generate SDCC debug symbols
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61 # ignored - no output formats supprt debugging symbols
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62 ;;
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63 # --globalize-symbols)
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64 # # Make all symbols global
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65 # # lwasm does not support globalizing everything by default
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66 # ;;
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67 -m*)
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68 fatal_error "invalid CPU option '$arg'"
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69 ;;
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70 --)
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71 fatal_error "standard input not supported"
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72 ;;
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73 # -a*)
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74 # options="${options}lc"
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75 # list_file_enabled=y
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76 # ;;
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77 -I*)
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78 #include_file=${arg#-I}
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79 #echo "warning: include path '$include_file' ignored"
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80 ;;
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81 -MD)
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82 fatal_error "assembler option '$arg' not supported"
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83 ;;
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84 -o)
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85 output_file=$1; shift
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86 ;;
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87 -v|-version)
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88 show_version
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89 ;;
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90 --version)
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91 show_version
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92 exit 0
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93 ;;
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94 -D|-f|-K|--traditional-format|-w|-x|-Z|-W|--no-warn)
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95 # These options are accepted but ignored by GNU as.
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96 true
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97 ;;
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98 # =*)
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99 # # Set the name of the listing file
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100 # list_file=${arg#=}
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101 # ;;
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102 -Qy)
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103 # "identify in output" - ignore
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104 true
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105 ;;
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106 -*)
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107 echo "as (m6809): unrecognized option $arg"
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108 exit 1
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109 ;;
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110 *)
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111 input_file=$arg
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112 ;;
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113 esac
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114 done
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115
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116 # Complain if no input files given. We don't support redirecting
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117 # from standard input.
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118
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119 if [ "x$input_file" = "x" ]; then
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120 fatal_error "no input file specified"
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121 fi
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122
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123 # Invoke the real (lwasm) assembler.
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124 # The -o option specifies the output file name
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125 # --obj creates object files
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126 # --pragma=undefextern causes undefined symbols to be assumed external
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127 # --pragma=cescapes allows C escape syntax in strings
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128 #echo lwasm -o "$output_file" $options --obj --pragma=undefextern --pragma=cescapes $input_file
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129 # pragma=newsource allows preprocessed asm files with macro expansion to assemble properly even
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130 # when the preprocessor interproses extra spaces
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131 lwasm -o "$output_file" $options --obj --pragma=undefextern --pragma=cescapes --pragma=importundefexport --pragma=newsource $input_file
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132 rc=$?
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133
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134 # OK, see if the assembler succeeded or not.
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135 # If it failed, the source is copied to /tmp/as6809_error.s
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136 # so that it can be inspected. GCC will normally delete any
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137 # temporary .s files that it generates. This makes debugging
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138 # the compiler easier.
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139 #
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140 # lwasm does not create an output file if it errors out but it also doesn't
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141 # remove an existing file if it fails so we remove it anyway...
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142
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143 if [ "$rc" != "0" ]; then
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144 cp -p $input_file /tmp/as6809_error.s
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145 rm -f $asoutput_file
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146 exit $rc
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147 fi
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148
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149 # we don't need anything fancy here since lwasm supports specifying output
84eb35251849 Added extra scripts that can be used to run gcc6809 with lwtools as its binutils
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150 # file names....