1 | @c Copyright 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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2 | @c This is part of the GAS manual.
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3 | @c For copying conditions, see the file as.texinfo.
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4 | @ifset GENERIC
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5 | @page
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6 | @node Z8000-Dependent
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7 | @chapter Z8000 Dependent Features
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8 | @end ifset
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9 | @ifclear GENERIC
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10 | @node Machine Dependencies
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11 | @chapter Z8000 Dependent Features
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12 | @end ifclear
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13 |
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14 | @cindex Z8000 support
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15 | The Z8000 @value{AS} supports both members of the Z8000 family: the
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16 | unsegmented Z8002, with 16 bit addresses, and the segmented Z8001 with
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17 | 24 bit addresses.
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18 |
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19 | When the assembler is in unsegmented mode (specified with the
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20 | @code{unsegm} directive), an address takes up one word (16 bit)
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21 | sized register. When the assembler is in segmented mode (specified with
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22 | the @code{segm} directive), a 24-bit address takes up a long (32 bit)
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23 | register. @xref{Z8000 Directives,,Assembler Directives for the Z8000},
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24 | for a list of other Z8000 specific assembler directives.
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25 |
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26 | @menu
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27 | * Z8000 Options:: No special command-line options for Z8000
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28 | * Z8000 Syntax:: Assembler syntax for the Z8000
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29 | * Z8000 Directives:: Special directives for the Z8000
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30 | * Z8000 Opcodes:: Opcodes
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31 | @end menu
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32 |
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33 | @node Z8000 Options
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34 | @section Options
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35 |
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36 | @cindex Z8000 options
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37 | @cindex options, Z8000
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38 | @code{@value{AS}} has no additional command-line options for the Zilog
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39 | Z8000 family.
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40 |
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41 | @node Z8000 Syntax
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42 | @section Syntax
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43 | @menu
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44 | * Z8000-Chars:: Special Characters
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45 | * Z8000-Regs:: Register Names
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46 | * Z8000-Addressing:: Addressing Modes
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47 | @end menu
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48 |
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49 | @node Z8000-Chars
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50 | @subsection Special Characters
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51 |
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52 | @cindex line comment character, Z8000
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53 | @cindex Z8000 line comment character
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54 | @samp{!} is the line comment character.
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55 |
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56 | @cindex line separator, Z8000
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57 | @cindex statement separator, Z8000
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58 | @cindex Z8000 line separator
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59 | You can use @samp{;} instead of a newline to separate statements.
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60 |
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61 | @node Z8000-Regs
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62 | @subsection Register Names
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63 |
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64 | @cindex Z8000 registers
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65 | @cindex registers, Z8000
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66 | The Z8000 has sixteen 16 bit registers, numbered 0 to 15. You can refer
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67 | to different sized groups of registers by register number, with the
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68 | prefix @samp{r} for 16 bit registers, @samp{rr} for 32 bit registers and
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69 | @samp{rq} for 64 bit registers. You can also refer to the contents of
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70 | the first eight (of the sixteen 16 bit registers) by bytes. They are
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71 | named @samp{r@var{n}h} and @samp{r@var{n}l}.
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72 |
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73 | @smallexample
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74 | @exdent @emph{byte registers}
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75 | r0l r0h r1h r1l r2h r2l r3h r3l
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76 | r4h r4l r5h r5l r6h r6l r7h r7l
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77 |
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78 | @exdent @emph{word registers}
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79 | r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12 r13 r14 r15
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80 |
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81 | @exdent @emph{long word registers}
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82 | rr0 rr2 rr4 rr6 rr8 rr10 rr12 rr14
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83 |
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84 | @exdent @emph{quad word registers}
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85 | rq0 rq4 rq8 rq12
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86 | @end smallexample
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87 |
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88 | @node Z8000-Addressing
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89 | @subsection Addressing Modes
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90 |
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91 | @cindex addressing modes, Z8000
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92 | @cindex Z800 addressing modes
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93 | @value{AS} understands the following addressing modes for the Z8000:
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94 |
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95 | @table @code
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96 | @item r@var{n}
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97 | Register direct
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98 |
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99 | @item @@r@var{n}
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100 | Indirect register
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101 |
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102 | @item @var{addr}
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103 | Direct: the 16 bit or 24 bit address (depending on whether the assembler
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104 | is in segmented or unsegmented mode) of the operand is in the instruction.
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105 |
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106 | @item address(r@var{n})
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107 | Indexed: the 16 or 24 bit address is added to the 16 bit register to produce
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108 | the final address in memory of the operand.
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109 |
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110 | @item r@var{n}(#@var{imm})
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111 | Base Address: the 16 or 24 bit register is added to the 16 bit sign
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112 | extended immediate displacement to produce the final address in memory
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113 | of the operand.
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114 |
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115 | @item r@var{n}(r@var{m})
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116 | Base Index: the 16 or 24 bit register r@var{n} is added to the sign
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117 | extended 16 bit index register r@var{m} to produce the final address in
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118 | memory of the operand.
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119 |
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120 | @item #@var{xx}
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121 | Immediate data @var{xx}.
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122 | @end table
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123 |
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124 | @node Z8000 Directives
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125 | @section Assembler Directives for the Z8000
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126 |
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127 | @cindex Z8000 directives
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128 | @cindex directives, Z8000
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129 | The Z8000 port of @value{AS} includes these additional assembler directives,
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130 | for compatibility with other Z8000 assemblers. As shown, these do not
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131 | begin with @samp{.} (unlike the ordinary @value{AS} directives).
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132 |
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133 | @table @code
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134 | @kindex segm
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135 | @item segm
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136 | Generates code for the segmented Z8001.
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137 |
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138 | @kindex unsegm
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139 | @item unsegm
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140 | Generates code for the unsegmented Z8002.
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141 |
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142 | @kindex name
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143 | @item name
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144 | Synonym for @code{.file}
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145 |
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146 | @kindex global
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147 | @item global
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148 | Synonym for @code{.global}
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149 |
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150 | @kindex wval
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151 | @item wval
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152 | Synonym for @code{.word}
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153 |
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154 | @kindex lval
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155 | @item lval
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156 | Synonym for @code{.long}
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157 |
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158 | @kindex bval
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159 | @item bval
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160 | Synonym for @code{.byte}
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161 |
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162 | @kindex sval
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163 | @item sval
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164 | Assemble a string. @code{sval} expects one string literal, delimited by
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165 | single quotes. It assembles each byte of the string into consecutive
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166 | addresses. You can use the escape sequence @samp{%@var{xx}} (where
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167 | @var{xx} represents a two-digit hexadecimal number) to represent the
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168 | character whose @sc{ascii} value is @var{xx}. Use this feature to
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169 | describe single quote and other characters that may not appear in string
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170 | literals as themselves. For example, the C statement @w{@samp{char *a =
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171 | "he said \"it's 50% off\"";}} is represented in Z8000 assembly language
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172 | (shown with the assembler output in hex at the left) as
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173 |
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174 | @iftex
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175 | @begingroup
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176 | @let@nonarrowing=@comment
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177 | @end iftex
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178 | @smallexample
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179 | 68652073 sval 'he said %22it%27s 50%25 off%22%00'
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180 | 61696420
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181 | 22697427
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182 | 73203530
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183 | 25206F66
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184 | 662200
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185 | @end smallexample
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186 | @iftex
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187 | @endgroup
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188 | @end iftex
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189 |
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190 | @kindex rsect
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191 | @item rsect
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192 | synonym for @code{.section}
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193 |
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194 | @kindex block
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195 | @item block
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196 | synonym for @code{.space}
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197 |
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198 | @kindex even
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199 | @item even
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200 | special case of @code{.align}; aligns output to even byte boundary.
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201 | @end table
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202 |
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203 | @node Z8000 Opcodes
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204 | @section Opcodes
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205 |
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206 | @cindex Z8000 opcode summary
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207 | @cindex opcode summary, Z8000
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208 | @cindex mnemonics, Z8000
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209 | @cindex instruction summary, Z8000
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210 | For detailed information on the Z8000 machine instruction set, see
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211 | @cite{Z8000 Technical Manual}.
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212 |
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213 | @ifset SMALL
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214 | @c this table, due to the multi-col faking and hardcoded order, looks silly
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215 | @c except in smallbook. See comments below "@set SMALL" near top of this file.
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216 |
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217 | The following table summarizes the opcodes and their arguments:
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218 | @iftex
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219 | @begingroup
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220 | @let@nonarrowing=@comment
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221 | @end iftex
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222 | @smallexample
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223 |
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224 | rs @r{16 bit source register}
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225 | rd @r{16 bit destination register}
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226 | rbs @r{8 bit source register}
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227 | rbd @r{8 bit destination register}
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228 | rrs @r{32 bit source register}
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229 | rrd @r{32 bit destination register}
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230 | rqs @r{64 bit source register}
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231 | rqd @r{64 bit destination register}
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232 | addr @r{16/24 bit address}
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233 | imm @r{immediate data}
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234 |
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235 | adc rd,rs clrb addr cpsir @@rd,@@rs,rr,cc
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236 | adcb rbd,rbs clrb addr(rd) cpsirb @@rd,@@rs,rr,cc
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237 | add rd,@@rs clrb rbd dab rbd
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238 | add rd,addr com @@rd dbjnz rbd,disp7
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239 | add rd,addr(rs) com addr dec @@rd,imm4m1
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240 | add rd,imm16 com addr(rd) dec addr(rd),imm4m1
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241 | add rd,rs com rd dec addr,imm4m1
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242 | addb rbd,@@rs comb @@rd dec rd,imm4m1
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243 | addb rbd,addr comb addr decb @@rd,imm4m1
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244 | addb rbd,addr(rs) comb addr(rd) decb addr(rd),imm4m1
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245 | addb rbd,imm8 comb rbd decb addr,imm4m1
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246 | addb rbd,rbs comflg flags decb rbd,imm4m1
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247 | addl rrd,@@rs cp @@rd,imm16 di i2
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248 | addl rrd,addr cp addr(rd),imm16 div rrd,@@rs
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249 | addl rrd,addr(rs) cp addr,imm16 div rrd,addr
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250 | addl rrd,imm32 cp rd,@@rs div rrd,addr(rs)
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251 | addl rrd,rrs cp rd,addr div rrd,imm16
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252 | and rd,@@rs cp rd,addr(rs) div rrd,rs
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253 | and rd,addr cp rd,imm16 divl rqd,@@rs
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254 | and rd,addr(rs) cp rd,rs divl rqd,addr
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255 | and rd,imm16 cpb @@rd,imm8 divl rqd,addr(rs)
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256 | and rd,rs cpb addr(rd),imm8 divl rqd,imm32
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257 | andb rbd,@@rs cpb addr,imm8 divl rqd,rrs
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258 | andb rbd,addr cpb rbd,@@rs djnz rd,disp7
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259 | andb rbd,addr(rs) cpb rbd,addr ei i2
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260 | andb rbd,imm8 cpb rbd,addr(rs) ex rd,@@rs
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261 | andb rbd,rbs cpb rbd,imm8 ex rd,addr
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262 | bit @@rd,imm4 cpb rbd,rbs ex rd,addr(rs)
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263 | bit addr(rd),imm4 cpd rd,@@rs,rr,cc ex rd,rs
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264 | bit addr,imm4 cpdb rbd,@@rs,rr,cc exb rbd,@@rs
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265 | bit rd,imm4 cpdr rd,@@rs,rr,cc exb rbd,addr
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266 | bit rd,rs cpdrb rbd,@@rs,rr,cc exb rbd,addr(rs)
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267 | bitb @@rd,imm4 cpi rd,@@rs,rr,cc exb rbd,rbs
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268 | bitb addr(rd),imm4 cpib rbd,@@rs,rr,cc ext0e imm8
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269 | bitb addr,imm4 cpir rd,@@rs,rr,cc ext0f imm8
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270 | bitb rbd,imm4 cpirb rbd,@@rs,rr,cc ext8e imm8
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271 | bitb rbd,rs cpl rrd,@@rs ext8f imm8
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272 | bpt cpl rrd,addr exts rrd
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273 | call @@rd cpl rrd,addr(rs) extsb rd
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274 | call addr cpl rrd,imm32 extsl rqd
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275 | call addr(rd) cpl rrd,rrs halt
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276 | calr disp12 cpsd @@rd,@@rs,rr,cc in rd,@@rs
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277 | clr @@rd cpsdb @@rd,@@rs,rr,cc in rd,imm16
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278 | clr addr cpsdr @@rd,@@rs,rr,cc inb rbd,@@rs
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279 | clr addr(rd) cpsdrb @@rd,@@rs,rr,cc inb rbd,imm16
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280 | clr rd cpsi @@rd,@@rs,rr,cc inc @@rd,imm4m1
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281 | clrb @@rd cpsib @@rd,@@rs,rr,cc inc addr(rd),imm4m1
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282 | inc addr,imm4m1 ldb rbd,rs(rx) mult rrd,addr(rs)
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283 | inc rd,imm4m1 ldb rd(imm16),rbs mult rrd,imm16
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284 | incb @@rd,imm4m1 ldb rd(rx),rbs mult rrd,rs
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285 | incb addr(rd),imm4m1 ldctl ctrl,rs multl rqd,@@rs
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286 | incb addr,imm4m1 ldctl rd,ctrl multl rqd,addr
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287 | incb rbd,imm4m1 ldd @@rs,@@rd,rr multl rqd,addr(rs)
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288 | ind @@rd,@@rs,ra lddb @@rs,@@rd,rr multl rqd,imm32
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289 | indb @@rd,@@rs,rba lddr @@rs,@@rd,rr multl rqd,rrs
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290 | inib @@rd,@@rs,ra lddrb @@rs,@@rd,rr neg @@rd
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291 | inibr @@rd,@@rs,ra ldi @@rd,@@rs,rr neg addr
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292 | iret ldib @@rd,@@rs,rr neg addr(rd)
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293 | jp cc,@@rd ldir @@rd,@@rs,rr neg rd
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294 | jp cc,addr ldirb @@rd,@@rs,rr negb @@rd
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295 | jp cc,addr(rd) ldk rd,imm4 negb addr
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296 | jr cc,disp8 ldl @@rd,rrs negb addr(rd)
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297 | ld @@rd,imm16 ldl addr(rd),rrs negb rbd
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298 | ld @@rd,rs ldl addr,rrs nop
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299 | ld addr(rd),imm16 ldl rd(imm16),rrs or rd,@@rs
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300 | ld addr(rd),rs ldl rd(rx),rrs or rd,addr
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301 | ld addr,imm16 ldl rrd,@@rs or rd,addr(rs)
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302 | ld addr,rs ldl rrd,addr or rd,imm16
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303 | ld rd(imm16),rs ldl rrd,addr(rs) or rd,rs
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304 | ld rd(rx),rs ldl rrd,imm32 orb rbd,@@rs
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305 | ld rd,@@rs ldl rrd,rrs orb rbd,addr
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306 | ld rd,addr ldl rrd,rs(imm16) orb rbd,addr(rs)
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307 | ld rd,addr(rs) ldl rrd,rs(rx) orb rbd,imm8
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308 | ld rd,imm16 ldm @@rd,rs,n orb rbd,rbs
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309 | ld rd,rs ldm addr(rd),rs,n out @@rd,rs
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310 | ld rd,rs(imm16) ldm addr,rs,n out imm16,rs
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311 | ld rd,rs(rx) ldm rd,@@rs,n outb @@rd,rbs
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312 | lda rd,addr ldm rd,addr(rs),n outb imm16,rbs
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313 | lda rd,addr(rs) ldm rd,addr,n outd @@rd,@@rs,ra
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314 | lda rd,rs(imm16) ldps @@rs outdb @@rd,@@rs,rba
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315 | lda rd,rs(rx) ldps addr outib @@rd,@@rs,ra
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316 | ldar rd,disp16 ldps addr(rs) outibr @@rd,@@rs,ra
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317 | ldb @@rd,imm8 ldr disp16,rs pop @@rd,@@rs
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318 | ldb @@rd,rbs ldr rd,disp16 pop addr(rd),@@rs
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319 | ldb addr(rd),imm8 ldrb disp16,rbs pop addr,@@rs
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320 | ldb addr(rd),rbs ldrb rbd,disp16 pop rd,@@rs
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321 | ldb addr,imm8 ldrl disp16,rrs popl @@rd,@@rs
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322 | ldb addr,rbs ldrl rrd,disp16 popl addr(rd),@@rs
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323 | ldb rbd,@@rs mbit popl addr,@@rs
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324 | ldb rbd,addr mreq rd popl rrd,@@rs
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325 | ldb rbd,addr(rs) mres push @@rd,@@rs
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326 | ldb rbd,imm8 mset push @@rd,addr
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327 | ldb rbd,rbs mult rrd,@@rs push @@rd,addr(rs)
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328 | ldb rbd,rs(imm16) mult rrd,addr push @@rd,imm16
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329 | push @@rd,rs set addr,imm4 subl rrd,imm32
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330 | pushl @@rd,@@rs set rd,imm4 subl rrd,rrs
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331 | pushl @@rd,addr set rd,rs tcc cc,rd
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332 | pushl @@rd,addr(rs) setb @@rd,imm4 tccb cc,rbd
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333 | pushl @@rd,rrs setb addr(rd),imm4 test @@rd
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334 | res @@rd,imm4 setb addr,imm4 test addr
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335 | res addr(rd),imm4 setb rbd,imm4 test addr(rd)
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336 | res addr,imm4 setb rbd,rs test rd
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337 | res rd,imm4 setflg imm4 testb @@rd
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338 | res rd,rs sinb rbd,imm16 testb addr
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339 | resb @@rd,imm4 sinb rd,imm16 testb addr(rd)
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340 | resb addr(rd),imm4 sind @@rd,@@rs,ra testb rbd
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341 | resb addr,imm4 sindb @@rd,@@rs,rba testl @@rd
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342 | resb rbd,imm4 sinib @@rd,@@rs,ra testl addr
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343 | resb rbd,rs sinibr @@rd,@@rs,ra testl addr(rd)
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344 | resflg imm4 sla rd,imm8 testl rrd
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345 | ret cc slab rbd,imm8 trdb @@rd,@@rs,rba
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346 | rl rd,imm1or2 slal rrd,imm8 trdrb @@rd,@@rs,rba
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347 | rlb rbd,imm1or2 sll rd,imm8 trib @@rd,@@rs,rbr
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348 | rlc rd,imm1or2 sllb rbd,imm8 trirb @@rd,@@rs,rbr
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349 | rlcb rbd,imm1or2 slll rrd,imm8 trtdrb @@ra,@@rb,rbr
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350 | rldb rbb,rba sout imm16,rs trtib @@ra,@@rb,rr
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351 | rr rd,imm1or2 soutb imm16,rbs trtirb @@ra,@@rb,rbr
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352 | rrb rbd,imm1or2 soutd @@rd,@@rs,ra trtrb @@ra,@@rb,rbr
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353 | rrc rd,imm1or2 soutdb @@rd,@@rs,rba tset @@rd
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354 | rrcb rbd,imm1or2 soutib @@rd,@@rs,ra tset addr
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355 | rrdb rbb,rba soutibr @@rd,@@rs,ra tset addr(rd)
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356 | rsvd36 sra rd,imm8 tset rd
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357 | rsvd38 srab rbd,imm8 tsetb @@rd
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358 | rsvd78 sral rrd,imm8 tsetb addr
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359 | rsvd7e srl rd,imm8 tsetb addr(rd)
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360 | rsvd9d srlb rbd,imm8 tsetb rbd
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361 | rsvd9f srll rrd,imm8 xor rd,@@rs
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362 | rsvdb9 sub rd,@@rs xor rd,addr
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363 | rsvdbf sub rd,addr xor rd,addr(rs)
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364 | sbc rd,rs sub rd,addr(rs) xor rd,imm16
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365 | sbcb rbd,rbs sub rd,imm16 xor rd,rs
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366 | sc imm8 sub rd,rs xorb rbd,@@rs
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367 | sda rd,rs subb rbd,@@rs xorb rbd,addr
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368 | sdab rbd,rs subb rbd,addr xorb rbd,addr(rs)
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369 | sdal rrd,rs subb rbd,addr(rs) xorb rbd,imm8
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370 | sdl rd,rs subb rbd,imm8 xorb rbd,rbs
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371 | sdlb rbd,rs subb rbd,rbs xorb rbd,rbs
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372 | sdll rrd,rs subl rrd,@@rs
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373 | set @@rd,imm4 subl rrd,addr
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374 | set addr(rd),imm4 subl rrd,addr(rs)
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375 | @end smallexample
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376 | @iftex
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377 | @endgroup
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378 | @end iftex
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379 | @end ifset
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380 |
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