hw/i386.reference/appa.htm

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   4 <TITLE>80386 Programmer's Reference Manual -- Appendix A</TITLE>
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   7 <B>up:</B> <A HREF="app.htm">
   8 Appendices</A><BR>
   9 <B>next:</B>
  10 <A HREF="appb.htm">Appendix B -- Complete Flag Cross-Reference</A><BR>
  11 <P>
  12 <HR>
  13 <P>
  14 <H1>Appendix A -- Opcode Map</H1>
  15
  16 The opcode tables that follow aid in interpreting 80386 object code. Use
  17 the high-order four bits of the opcode as an index to a row of the opcode
  18 table; use the low-order four bits as an index to a column of the table. If
  19 the opcode is 0FH, refer to the two-byte opcode table and use the second
  20 byte of the opcode to index the rows and columns of that table.
  21
  22
  23 <H3>Key to Abbreviations</H3>
  24
  25 Operands are identified by a two-character code of the form Zz. The first
  26 character, an uppercase letter, specifies the addressing method; the second
  27 character, a lowercase letter, specifies the type of operand.
  28
  29
  30 <H3>Codes for Addressing Method</H3>
  31
  32 <DL>
  33 <DT>A
  34 <DD>Direct address; the instruction has no modR/M byte; the address of the
  35    operand is encoded in the instruction; no base register, index register,
  36    or scaling factor can be applied; e.g., far <A HREF="JMP.htm">JMP</A> (EA).
  37
  38 <DT>C
  39 <DD>The reg field of the modR/M byte selects a control register; e.g.,
  40 <A HREF="MOVRS.htm">MOV</A>
  41    (0F20, 0F22).
  42
  43 <DT>D
  44 <DD>The reg field of the modR/M byte selects a debug register; e.g.,
  45 <A HREF="MOVRS.htm">MOV</A>
  46    (0F21,0F23).
  47
  48 <DT>E
  49 <DD>A modR/M byte follows the opcode and specifies the operand. The operand
  50    is either a general register or a memory address. If it is a memory
  51    address, the address is computed from a segment register and any of the
  52    following values: a base register, an index register, a scaling factor,
  53    a displacement.
  54
  55 <DT>F
  56 <DD>Flags Register.
  57
  58 <DT>G
  59 <DD>The reg field of the modR/M byte selects a general register; e.g.,
  60 <A HREF="ADD.htm">ADD</A>
  61    (00).
  62
  63 <DT>I
  64 <DD>Immediate data. The value of the operand is encoded in subsequent bytes
  65    of the instruction.
  66
  67 <DT>J
  68 <DD>The instruction contains a relative offset to be added to the
  69    instruction pointer register; e.g., <A HREF="JMP.htm">JMP</A> short,
  70 <A HREF="LOOP.htm">LOOP</A>.
  71
  72 <DT>M
  73 <DD>The modR/M byte may refer only to memory; e.g.,
  74 <A HREF="BOUND.htm">BOUND</A>, <A HREF="LGS.htm">LES</A>,
  75 <A HREF="LGS.htm">LDS</A>, <A HREF="LGS.htm">LSS</A>,
  76 <A HREF="LGS.htm">LFS</A>, <A HREF="LGS.htm">LGS</A>.
  77
  78 <DT>O
  79 <DD>The instruction has no modR/M byte; the offset of the operand is coded as
  80    a word or double word (depending on address size attribute) in the
  81    instruction. No base register, index register, or scaling factor can be
  82    applied; e.g., <A HREF="MOV.htm">MOV</A> (A0-A3).
  83
  84 <DT>R
  85 <DD>The mod field of the modR/M byte may refer only to a general register;
  86    e.g., <A HREF="MOV.htm">MOV</A> (0F20-0F24, 0F26).
  87
  88 <DT>S
  89 <DD>The reg field of the modR/M byte selects a segment register; e.g.,
  90 <A HREF="MOV.htm">MOV</A>
  91    (8C,8E).
  92
  93 <DT>T
  94 <DD>The reg field of the modR/M byte selects a test register; e.g.,
  95 <A HREF="MOVRS.htm">MOV</A>
  96    (0F24,0F26).
  97
  98 <DT>X
  99 <DD>Memory addressed by DS:SI; e.g., <A HREF="MOVS.htm">MOVS</A>,
 100 <A HREF="CMPS.htm">CMPS</A>,
 101 <A HREF="OUTS.htm">OUTS</A>,
 102 <A HREF="LODS.htm">LODS</A>,
 103 <A HREF="SCAS.htm">SCAS</A>.
 104
 105 <DT>Y
 106 <DD>Memory addressed by ES:DI; e.g.,
 107 <A HREF="MOVS.htm">MOVS</A>,
 108 <A HREF="CMPS.htm">CMPS</A>,
 109 <A HREF="INS.htm">INS</A>,
 110 <A HREF="STOS.htm">STOS</A>.
 111 </DL>
 112
 113 <H3>Codes for Operant Type</H3>
 114
 115 <DL>
 116 <DT>a
 117 <DD> Two one-word operands in memory or two double-word operands in memory,
 118    depending on operand size attribute (used only by
 119 <A HREF="BOUND.htm">BOUND</A>)
 120
 121 <DT>b
 122 <DD>Byte (regardless of operand size attribute)
 123
 124 <DT>c
 125 <DD>Byte or word, depending on operand size attribute.
 126
 127 <DT>d
 128 <DD>Double word (regardless of operand size attribute)
 129
 130 <DT>p
 131 <DD>32-bit or 48-bit pointer, depending on operand size attribute.
 132
 133 <DT>s
 134 <DD>Six-byte pseudo-descriptor
 135
 136 <DT>v
 137 <DD>Word or double word, depending on operand size attribute.
 138
 139 <DT>w
 140 <DD>Word (regardless of operand size attribute)
 141 </DL>
 142
 143 <H3>Register Codes</H3>
 144
 145 When an operand is a specific register encoded in the opcode, the register
 146 is identified by its name; e.g., AX, CL, or ESI. The name of the register
 147 indicates whether the register is 32-, 16-, or 8-bits wide. A register
 148 identifier of the form eXX is used when the width of the register depends on
 149 the operand size attribute; for example, eAX indicates that the AX register
 150 is used when the operand size attribute is 16 and the EAX register is used
 151 when the operand size attribute is 32.
 152
 153
 154 <H3>One-Byte Opcode Map</H3>
 155
 156 <PRE>
 157        0         1         2         3         4         5         6        7        8         9         A         B         C         D         E        F
 158  +-----------------------------------------------------------+--------+--------+-----------------------------------------------------------+--------+--------+
 159  |                              <A HREF="ADD.htm">ADD</A>                          |  <A HREF="PUSH.htm">PUSH</A>  |   <A HREF="POP.htm">POP</A>  |                             <A HREF="OR.htm">OR</A>                            |  <A HREF="PUSH.htm">PUSH</A>  | 2-byte |
 160 0|---------+---------+---------+---------+---------+---------+        |        +---------+---------+---------+---------+---------+---------+        |        |
 161  |  Eb,Gb  |  Ev,Gv  |  Gb,Eb  |  Gv,Ev  |  AL,Ib  | eAX,Iv  |   ES   |   ES   |  Eb,Gb  |  Ev,Gv  |  Gb,Eb  |  Gv,Ev  |  AL,Ib  | eAX,Iv  |   CS   | escape |
 162  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 163  |                              <A HREF="ADC.htm">ADC</A>                          |  <A HREF="PUSH.htm">PUSH</A>  |   <A HREF="POP.htm">POP</A>  |                            <A HREF="SBB.htm">SBB</A>                            |  <A HREF="PUSH.htm">PUSH</A>  |  <A HREF="POP.htm">POP</A>   |
 164 1|---------+---------+---------+---------+---------+---------+        |        +---------+---------+---------+---------+---------+---------+        |        |
 165  |  Eb,Gb  |  Ev,Gv  |  Gb,Eb  |  Gv,Ev  |  AL,Ib  | eAX,Iv  |   SS   |   SS   |  Eb,Gb  |  Ev,Gv  |  Gb,Eb  |  Gv,Ev  |  AL,Ib  | eAX,Iv  |   DS   |   DS   |
 166  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 167  |                              <A HREF="AND.htm">AND</A>                          |  SEG   |        |                            <A HREF="SUB.htm">SUB</A>                            |  SEG   |        |
 168 2|---------+---------+---------+---------+---------+---------+        |   <A HREF="DAA.htm">DAA</A>  +---------+---------+---------+---------+---------+---------+        |  <A HREF="DAS.htm">DAS</A>   |
 169  |  Eb,Gb  |  Ev,Gv  |  Gb,Eb  |  Gv,Ev  |  AL,Ib  | eAX,Iv  |  =ES   |        |  Eb,Gb  |  Ev,Gv  |  Gb,Eb  |  Gv,Ev  |  AL,Ib  | eAX,Iv  |  =CS   |        |
 170  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 171  |                              <A HREF="XOR.htm">XOR</A>                          |  SEG   |        |                            <A HREF="CMP.htm">CMP</A>                            |  SEG   |        |
 172 3|---------+---------+---------+---------+---------+---------+        |   <A HREF="AAA.htm">AAA</A>  +---------+---------+---------+---------+---------+---------+        |  <A HREF="AAS.htm">AAS</A>   |
 173  |  Eb,Gb  |  Ev,Gv  |  Gb,Eb  |  Gv,Ev  |  AL,Ib  | eAX,Iv  |  =SS   |        |  Eb,Gb  |  Ev,Gv  |  Gb,Eb  |  Gv,Ev  |  AL,Ib  | eAX,Iv  |  =CS   |        |
 174  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 175  |                               <A HREF="INC.htm">INC</A> general register                          |                              <A HREF="DEC.htm">DEC</A> general register                           |
 176 4|---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 177  |   eAX   |   eCX   |   eDX   |   eBX   |   eSP   |   eBP   |  eSI   |  eDI   |   eAX   |   eCX   |   eDX   |   eBX   |   eSP   |   eBP   |   eSI  |  eDI   |
 178  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 179  |                               <A HREF="PUSH.htm">PUSH</A> general register                         |                          <A HREF="POP.htm">POP</A> into general register                          |
 180 5|---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 181  |   eAX   |   eCX   |   eDX   |   eBX   |   eSP   |   eBP   |  eSI   |  eDI   |   eAX   |   eCX   |   eDX   |   eBX   |   eSP   |   eBP   |  eSI   |  eDI   |
 182  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 183  |         |         |  <A HREF="BOUND.htm">BOUND</A>  |  <A HREF="ARPL.htm">ARPL</A>   |   SEG   |   SEG   | Operand| Address|  <A HREF="PUSH.htm">PUSH</A>   |  <A HREF="IMUL.htm">IMUL</A>   |  <A HREF="PUSH.htm">PUSH</A>   |  <A HREF="IMUL.htm">IMUL</A>   |  <A HREF="INS.htm">INSB</A>   | <A HREF="INS.htm">INSW/D</A>  | <A HREF="OUTS.htm">OUTSB</A>  |<A HREF="OUTS.htm">OUTSW/D</A> |
 184 6|  <A HREF="PUSHA.htm">PUSHA</A>  |  <A HREF="POPA.htm">POPA</A>   |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 185  |         |         |  Gv,Ma  |  Ew,Rw  |   =FS   |   =GS   |  Size  |  Size  |   Ib    | GvEvIv  |   Ib    | GvEvIv  |  Yb,DX  |  Yb,DX  | Dx,Xb  | DX,Xv  |
 186  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 187  |                    Short displacement jump of condition (Jb)                |                   Short-displacement jump on condition(Jb)                  |
 188 7|---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 189  |   <A HREF="Jcc.htm">JO</A>    |   <A HREF="Jcc.htm">JNO</A>   |   <A HREF="Jcc.htm">JB</A>    |   <A HREF="Jcc.htm">JNB</A>   |   <A HREF="Jcc.htm">JZ</A>    |  <A HREF="Jcc.htm">JNZ</A>    |   <A HREF="Jcc.htm">JBE</A>  |  <A HREF="Jcc.htm">JNBE</A>  |   <A HREF="Jcc.htm">JS</A>    |   <A HREF="Jcc.htm">JNS</A>   |   <A HREF="Jcc.htm">JP</A>    |   <A HREF="Jcc.htm">JNP</A>   |   <A HREF="Jcc.htm">JL</A>    |  <A HREF="Jcc.htm">JNL</A>    |  <A HREF="Jcc.htm">JLE</A>   |  <A HREF="Jcc.htm">JNLE</A>  |
 190  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 191  |  Immediate Grpl   |         |  Grpl   |       <A HREF="TEST.htm">TEST</A>        |      <A HREF="XCHG.htm">XCHG</A>       |                 <A HREF="MOV.htm">MOV</A>                   |   <A HREF="MOV.htm">MOV</A>   |   <A HREF="LEA.htm">LEA</A>   |  <A HREF="MOV.htm">MOV</A>   |  <A HREF="POP.htm">POP</A>   |
 192 8|---------+---------+         |         +---------+---------+--------+--------+---------+---------+---------+---------+         |         |        |        |
 193  |  Eb,Ib  |  Ev,Iv  |         |  Ev,Iv  |  Eb,Gb  |  Ev,Gv  |  Eb,Gb |  Ev,Gv |  Eb,Gb  |  Ev,Gv  |  Gb,Eb  |  Gv,Ev  |  Ew,Sw  |  Gv,M   |  Sw,Ew |   Ev   |
 194  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 195  |         |              <A HREF="XCHG.htm">XCHG</A> word or double-word register with eAX           |         |         |  <A HREF="CALL.htm">CALL</A>   |         |  <A HREF="PUSHF.htm">PUSHF</A>  |  <A HREF="POPF.htm">POPF</A>   |        |        |
 196 9|   <A HREF="NOP.htm">NOP</A>   +---------+---------+---------+---------+---------+--------+--------+   <A HREF="CBW.htm">CBW</A>   |   <A HREF="CWD.htm">CWD</A>   |         |  <A HREF="WAIT.htm">WAIT</A>   |         |         |  <A HREF="SAHF">SAHF</A>  |  <A HREF="LAHF.htm">LAHF</A>  |
 197  |         |   eCX   |   eDX   |   eBX   |   eSP   |   eBP   |  eSI   |  eDI   |         |         |   Ap    |         |   Fv    |   Fv    |        |        |
 198  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 199  |                  <A HREF="MOV.htm">MOV</A>                  |  <A HREF="MOVS.htm">MOVSB</A>  | <A HREF="MOVS.htm">MOVSW/D</A> | <A HREF="CMPS.htm">CMPSB</A>  |<A HREF="CMPS.htm">CMPSW/D</A> |       <A HREF="TEST.htm">TEST</A>        |  <A HREF="STOS.htm">STOSB</A>  | <A HREF="STOS.htm">STOSW/D</A> |  <A HREF="LODS.htm">LODSB</A>  | <A HREF="LODS.htm">LODSW/D</A> | <A HREF="SCAS.htm">SCASB</A>  |<A HREF="SCAS.htm">SCASW/D</A> |
 200 A|---------+---------+---------+---------+         |         |        |        +---------+---------+         |         |         |         |        |        |
 201  |  AL,Ob  |  eAX,Ov |  Ob,AL  |  Ov,eAX |  Xb,Yb  |  Xv,Yv  |  Xb,Yb |  Xv,Yv |  AL,Ib  | eAX,Iv  |  Yb,AL  |  Yv,eAX |  AL,Xb  | eAX,Xv  |  AL,Xb |eAX,Xv  |
 202  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 203  |                       <A HREF="MOV.htm">MOV</A> immediate byte into byte register                 |        <A HREF="MOV.htm">MOV</A> immediate word or double into word or double register            |
 204 B|---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 205  |    AL   |   CL    |   DL    |   BL    |   AH    |   CH    |   DH   |   BH   |   eAX   |   eCX   |   eDX   |   eBX   |   eSP   |   eBP   |   eSI  |  eDI   |
 206  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 207  |    Shift Grp2     |      <A HREF="RET.htm">RET</A> near     |   <A HREF="LGS.htm">LES</A>   |   <A HREF="LGS.htm">LDS</A>   |       <A HREF="MOV.htm">MOV</A>       |  <A HREF="ENTER.htm">ENTER</A>  |         |      <A HREF="RET.htm">RET</A> far      |  <A HREF="INT.htm">INT</A>    |  <A HREF="INT.htm">INT</A>    |        |        |
 208 C|---------+---------+---------+---------+         |         +--------+--------+         |  <A HREF="LEAVE.htm">LEAVE</A>  +---------+---------+         |         |  <A HREF="INT.htm">INTO</A>  |  <A HREF="IRET.htm">IRET</A>  |
 209  |  Eb,Ib  |  Ev,Iv  |    Iw   |         |  Gv,Mp  |  Gv,Mp  |  Eb,Ib |  Ev,Iv |  Iw,Ib  |         |   Iw    |         |   3     |  Ib     |        |        |
 210  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 211  |               Shift Grp2              |         |         |        |        |                                                                             |
 212 D|---------+---------+---------+---------+   <A HREF="AAM.htm">AAM</A>   |   <A HREF="AAD.htm">AAD</A>   |        |  <A HREF="XLAT.htm">XLAT</A>  |                  ESC(Escape to coprocessor instruction set)                 |
 213  |   Eb,1  |  Ev,1   |  Eb,CL  |  Ev,CL  |         |         |        |        |                                                                             |
 214  +---------+---------+---------+---------+---------+---------+--------+--------+---------+-----------------------------+-------------------+-----------------+
 215  | <A HREF="LOOP.htm">LOOPNE</A>  |  <A HREF="LOOP.htm">LOOPE</A>  |   <A HREF="LOOP.htm">LOOP</A>  |  <A HREF="Jcc.htm">JCXZ</A>   |        <A HREF="IN.htm">IN</A>         |       <A HREF="OUT.htm">OUT</A>       |   <A HREF="CALL.htm">CALL</A>  |             <A HREF="Jcc.htm">JNP</A>             |        <A HREF="IN.htm">IN</A>         |       <A HREF="OUT.htm">OUT</A>       |
 216 E|         |         |         |         +---------+---------+--------+--------+         +---------+---------+---------+---------+---------+--------+--------+
 217  |   Jb    |   Jb    |    Jb   |   Jb    |  AL,Ib  | eAX,Ib  |  Ib,AL | Ib,eAX |    Av   |   Jv    |   Ap    |   Jb    |  AL,DX  | eAX,DX  | DX,AL  | DX,eAX |
 218  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 219  |         |         |         |   <A HREF="REP.htm">REP</A>   |         |         |     Unary Grp3  |         |         |         |         |         |         |<A HREF="INC.htm">INC</A>/<A HREF="DEC.htm">DEC</A> |Indirct |
 220 F|  <A HREF="LOCK.htm">LOCK</A>   |         |  <A HREF="REP.htm">REPNE</A>  |         |   <A HREF="HLT.htm">HLT</A>   |   <A HREF="CMC.htm">CMC</A>   +--------+--------+   <A HREF="CLC.htm">CLC</A>   |   <A HREF="STC.htm">STC</A>   |   <A HREF="CLI.htm">CLI</A>   |   <A HREF="STI.htm">STI</A>   |   <A HREF="CLD.htm">CLD</A>   |   <A HREF="STD.htm">STD</A>   |        |        |
 221  |         |         |         |  <A HREF="REP.htm">REPE</A>   |         |         |   Eb   |   Ev   |         |         |         |         |         |         |  Grp4  |  Grp5  |
 222  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 223 </PRE>
 224
 225 <H3>Two-Byte Opcode Map (first byte is 0FH)</H3>
 226
 227 <PRE>
 228       0         1         2         3         4         5         6        7        8         9         A         B         C         D         E        F
 229  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 230  |         |         |   <A HREF="LAR.htm">LAR</A>   |   <A HREF="LSL.htm">LSL</A>   |         |         |        |        |         |         |         |         |         |         |        |        |
 231 0|  Grp6   |  Grp7   |         |         |         |         |  <A HREF="CLTS.htm">CLTS</A>  |        |         |         |         |         |         |         |        |        |
 232  |         |         |  Gw,Ew  |  Gv,Ew  |         |         |        |        |         |         |         |         |         |         |        |        |
 233  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 234  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 235 1|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 236  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 237  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 238  |   <A HREF="MOVRS.htm">MOV</A>   |   <A HREF="MOVRS.htm">MOV</A>   |   <A HREF="MOVRS.htm">MOV</A>   |   <A HREF="MOVRS.htm">MOV</A>   |   <A HREF="MOVRS.htm">MOV</A>   |         |   <A HREF="MOVRS.htm">MOV</A>  |        |         |         |         |         |         |         |        |        |
 239 2|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 240  |  Cd,Rd  |  Dd,Rd  |  Rd,Cd  |  Rd,Dd  |  Td,Rd  |         |  Rd,Td |        |         |         |         |         |         |         |        |        |
 241  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 242  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 243 3|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 244  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 245  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 246  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 247 4|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 248  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 249  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 250  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 251 5|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 252  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 253  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 254  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 255 6|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 256  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 257  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 258  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 259 7|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 260  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 261  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 262  |                      Long-displacement jump on condition (Jv)               |                 Long-displacement jump on condition (Jv)                    |
 263 8|---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 264  |   <A HREF="Jcc.htm">JO</A>    |   <A HREF="Jcc.htm">JNO</A>   |   <A HREF="Jcc.htm">JB</A>    |   <A HREF="Jcc.htm">JNB</A>   |   <A HREF="Jcc.htm">JZ</A>    |   <A HREF="Jcc.htm">JNZ</A>   |   <A HREF="Jcc.htm">JBE</A>  |  <A HREF="Jcc.htm">JNBE</A>  |   <A HREF="Jcc.htm">JS</A>    |   <A HREF="Jcc.htm">JNS</A>   |   <A HREF="Jcc.htm">JP</A>    |   <A HREF="Jcc.htm">JNP</A>   |   <A HREF="Jcc.htm">JL</A>    |   <A HREF="Jcc.htm">JNL</A>   |   <A HREF="Jcc.htm">JLE</A>  |  <A HREF="Jcc.htm">JNLE</A>  |
 265  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 266  |                              Byte Set on condition (Eb)                     |         |         |         |         |         |         |        |        |
 267 9|---------+---------+---------+---------+---------+---------+--------+--------+  <A HREF="SETcc.htm">SETS</A>   |  <A HREF="SETcc.htm">SETNS</A>  |  <A HREF="SETcc.htm">SETP</A>   |  <A HREF="SETcc.htm">SETNP</A>  |  <A HREF="SETcc.htm">SETL</A>   |  <A HREF="SETcc.htm">SETNL</A>  |  <A HREF="SETcc.htm">SETLE</A> | <A HREF="SETcc.htm">SETNLE</A> |
 268  |  <A HREF="SETcc.htm">SETO</A>   |  <A HREF="SETcc.htm">SETNO</A>  |  <A HREF="SETcc.htm">SETB</A>   |  <A HREF="SETcc.htm">SETNB</A>  |  <A HREF="SETcc.htm">SETZ</A>   |  <A HREF="SETcc.htm">SETNZ</A>  |  <A HREF="SETcc.htm">SETBE</A> | <A HREF="SETcc.htm">SETNBE</A> |         |         |         |         |         |         |        |        |
 269  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 270  |  <A HREF="PUSH.htm">PUSH</A>   |   <A HREF="POP.htm">POP</A>   |         |   <A HREF="BT.htm">BT</A>    |  <A HREF="SAL.htm">SHLD</A>   |  <A HREF="SAL.htm">SHLD</A>   |        |        |  <A HREF="PUSH.htm">PUSH</A>   |   <A HREF="POP.htm">POP</A>   |         |   <A HREF="BTS.htm">BTS</A>   |  <A HREF="SAL.htm">SHRD</A>   |  <A HREF="SAL.htm">SHRD</A>   |        |  <A HREF="IMUL.htm">IMUL</A>  |
 271 A|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 272  |   FS    |   FS    |         |  Ev,Gv  | EvGvIb  | EvGvCL  |        |        |   GS    |   GS    |         |  Ev,Gv  | EvGvIb  | EvGvCL  |        | Gv,Ev  |
 273  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 274  |         |         |   <A HREF="LGS.htm">LSS</A>   |   <A HREF="BTR.htm">BTR</A>   |   <A HREF="LGS.htm">LFS</A>   |   <A HREF="LGS.htm">LGS</A>   |      <A HREF="MOVZX.htm">MOVZX</A>      |         |         |  Grp-8  |   <A HREF="BTC.htm">BTC</A>   |   <A HREF="BSF.htm">BSF</A>   |   <A HREF="BSR.htm">BSR</A>   |      <A HREF="MOVSX.htm">MOVSX</A>      |
 275 B|         |         |         |         |         |         +--------+--------+         |         |         |         |         |         +-----------------+
 276  |         |         |   Mp    |  Ev,Gv  |   Mp    |   Mp    | Gv,Eb  | Gv,Ew  |         |         |  Ev,Ib  |  Ev,Gv  |  Gv,Ev  |  Gv,Ev  |  Gv,Eb   Gv,Ew  |
 277  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 278  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 279 C|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 280  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 281  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 282  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 283 D|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 284  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 285  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 286  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 287 E|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 288  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 289  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 290  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 291 F|         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 292  |         |         |         |         |         |         |        |        |         |         |         |         |         |         |        |        |
 293  +---------+---------+---------+---------+---------+---------+--------+--------+---------+---------+---------+---------+---------+---------+--------+--------+
 294 </PRE>
 295
 296 <H3>Opcodes determined by bits 5,4,3 of modR/M byte</H3>
 297
 298 <PRE>
 299      G                       +-------+-------+-------+
 300      r                       |  mod  |  nnn  |  R/M  |
 301      o                       +-------+-------+-------+
 302      u
 303      p   000     001     010     011     100     101     110     111
 304       +-------+-------+-------+-------+-------+-------+-------+-------+
 305      1|  <A HREF="ADD.htm">ADD</A>  |  <A HREF="OR.htm">OR</A>   |  <A HREF="ADC.htm">ADC</A>  |  <A HREF="SBB.htm">SBB</A>  |  <A HREF="AND.htm">AND</A>  |  <A HREF="SUB.htm">SUB</A>  |  <A HREF="XOR.htm">XOR</A>  |  <A HREF="CMP.htm">CMP</A>  |
 306       |       |       |       |       |       |       |       |       |
 307       +-------+-------+-------+-------+-------+-------+-------+-------+
 308      2|  <A HREF="RCL.htm">ROL</A>  |  <A HREF="RCL.htm">ROR</A>  |  <A HREF="RCL.htm">RCL</A>  |  <A HREF="RCL.htm">RCR</A>  |  <A HREF="SAL.htm">SHL</A>  |  <A HREF="SAL.htm">SHR</A>  |       |  <A HREF="SAL.htm">SAR</A>  |
 309       |       |       |       |       |       |       |       |       |
 310       +-------+-------+-------+-------+-------+-------+-------+-------+
 311      3| <A HREF="TEST.htm">TEST</A>  |       |  <A HREF="NOT.htm">NOT</A>  |  <A HREF="NEG.htm">NEG</A>  |  <A HREF="MUL.htm">MUL</A>  | <A HREF="IMUL.htm">IMUL</A>  |  <A HREF="DIV.htm">DIV</A>  | <A HREF="IDIV.htm">IDIV</A>  |
 312       | Ib/Iv |       |       |       |AL/eAX |AL/eAX |AL/eAX |AL/eAX |
 313       +-------+-------+-------+-------+-------+-------+-------+-------+
 314      4|  INC  |  <A HREF="DEC.htm">DEC</A>  |       |       |       |       |       |       |
 315       |  Eb   |  Eb   |       |       |       |       |       |       |
 316       +-------+-------+-------+-------+-------+-------+-------+-------+
 317      5|  <A HREF="INC.htm">INC</A>  |  <A HREF="DEC.htm">DEC</A>  | <A HREF="CALL.htm">CALL</A>  | <A HREF="CALL.htm">CALL</A>  |  <A HREF="JMP.htm">JMP</A>  |  <A HREF="JMP.htm">JMP</A>  | <A HREF="PUSH.htm">PUSH</A>  |       |
 318       |  Ev   |  Ev   |  Ev   |  eP   |  Ev   |  Ep   |  Ev   |       |
 319       +-------+-------+-------+-------+-------+-------+-------+-------+
 320 </PRE>
 321
 322 <H3>Opcodes determined by bits 5,4,3 of modR/M byte</H3>
 323
 324 <PRE>
 325      G                       +-------+-------+-------+
 326      r                       |  mod  |  nnn  |  R/M  |
 327      o                       +-------+-------+-------+
 328      u
 329      p   000     001     010     011     100     101     110     111
 330       +-------+-------+-------+-------+-------+-------+-------+-------+
 331      6| <A HREF="SLDT.htm">SLDT</A>  |  <A HREF="STR.htm">STR</A>  | <A HREF="LLDT.htm">LLDT</A>  |  <A HREF="LTR.htm">LTR</A>  | <A HREF="VERR.htm">VERR</A>  | <A HREF="VERR.htm">VERW</A>  |       |       |
 332       |  Ew   |  Ew   |  Ew   |  Ew   |  Ew   |  Ew   |       |       |
 333       +-------+-------+-------+-------+-------+-------+-------+-------+
 334      7| <A HREF="SGDT.htm">SGDT</A>  | <A HREF="SGDT.htm">SIDT</A>  | <A HREF="LGDT.htm">LGDT</A>  | <A HREF="LGDT.htm">LIDT</A>  | <A HREF="SMSW.htm">SMSW</A>  |       | <A HREF="LMSW.htm">LMSW</A>  |       |
 335       |  Ms   |  Ms   |  Ms   |   Ms  |  Ew   |       |  Ew   |       |
 336       +-------+-------+-------+-------+-------+-------+-------+-------+
 337      8|       |       |       |       |  <A HREF="BT.htm">BT</A>   |  <A HREF="BTS.htm">BTS</A>  |  <A HREF="BTR.htm">BTR</A>  |  <A HREF="BTC.htm">BTC</A>  |
 338       |       |       |       |       |       |       |       |       |
 339       +-------+-------+-------+-------+-------+-------+-------+-------+
 340 </PRE>
 341 <P>
 342 <HR>
 343 <P>
 344 <B>up:</B> <A HREF="app.htm">
 345 Appendices</A><BR>
 346 <B>next:</B>
 347 <A HREF="appb.htm">Appendix B -- Complete Flag Cross-Reference</A><BR>
 348 </BODY>