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| = Constants = | | = 特殊方法 = |
| Push constants into the operand stack.
| | == xxx == |
| | <syntaxhighlight lang="java"> |
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| ; iconst_<i>: Push the int constant <i> (-1, 0, 1, 2, 3, 4 or 5) onto the operand stack.
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| ; bipush: Push byte. iconst_<i> is equivalent to bipush <i>
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| ; lconst_<l>: Push long.
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| ; fconst_<f>: Push float.
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| ; dconst_<d>: Push double.
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| ; sipush: Push short
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| ; ldc: Push from constant pool(int, float, or string reference, etc.)
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| ; ldc: Push from constant pool(long, double, etc)
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|
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| <syntaxhighlight lang="lisp">
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| 00 (0x00) nop
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| 01 (0x01) aconst_null
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| 02 (0x02) iconst_m1
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| 03 (0x03) iconst_0
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| 04 (0x04) iconst_1
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| 05 (0x05) iconst_2
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| 06 (0x06) iconst_3
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| 07 (0x07) iconst_4
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| 08 (0x08) iconst_5
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| 09 (0x09) lconst_0
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| 10 (0x0a) lconst_1
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| 11 (0x0b) fconst_0
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| 12 (0x0c) fconst_1
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| 13 (0x0d) fconst_2
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| 14 (0x0e) dconst_0
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| 15 (0x0f) dconst_1
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| 16 (0x10) bipush (byte)
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| 17 (0x11) sipush (byte1 byte2)
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| 18 (0x12) ldc (index)
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| 19 (0x13) ldc_w (indexbyte1 indexbyte2)
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| 20 (0x14) ldc2_w (indexbyte1 indexbyte2)
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| </syntaxhighlight>
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|
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| = Loads =
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| Load value from local variable to operand stack.
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|
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| ; iload_<i>: Load int
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| ; lload_<i>: Load long
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| ; fload_<i>: Load float
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| ; dload_<i>: Load double
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| ; aload_<i>: Load reference
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| ; iaload: Load int from array. ..., arrayref, index → both array ref and index are popped from operand stack
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| ; laload: Load long from array
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| ; faload: Load float from array
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| ; daload: Load double from array
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| ; aaload: Load reference from array
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| ; baload: Load byte from array
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| ; caload: Load char from array
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| ; saload: Load short from array
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| <syntaxhighlight lang="lisp">
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| 21 (0x15) iload (index)
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| 22 (0x16) lload (index)
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| 23 (0x17) fload (index)
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| 24 (0x18) dload (index)
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| 25 (0x19) aload (index)
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| 26 (0x1a) iload_0
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| 27 (0x1b) iload_1
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| 28 (0x1c) iload_2
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| 29 (0x1d) iload_3
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| 30 (0x1e) lload_0
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| 31 (0x1f) lload_1
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| 32 (0x20) lload_2
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| 33 (0x21) lload_3
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| 34 (0x22) fload_0
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| 35 (0x23) fload_1
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| 36 (0x24) fload_2
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| 37 (0x25) fload_3
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| 38 (0x26) dload_0
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| 39 (0x27) dload_1
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| 40 (0x28) dload_2
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| 41 (0x29) dload_3
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| 42 (0x2a) aload_0
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| 43 (0x2b) aload_1
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| 44 (0x2c) aload_2
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| 45 (0x2d) aload_3
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| 46 (0x2e) iaload
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| 47 (0x2f) laload
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| 48 (0x30) faload
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| 49 (0x31) daload
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| 50 (0x32) aaload
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| 51 (0x33) baload
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| 52 (0x34) caload
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| 53 (0x35) saload
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| </syntaxhighlight>
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|
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| = Stores =
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| Store value into local variable.
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|
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| ; istore: Store the value from the top of the operand stack(must be int) into local variable
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| ; iastore: Store into int array. ..., arrayref, index, value → values are popped from operand stack
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|
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| <syntaxhighlight lang="lisp">
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| 54 (0x36) istore (index)
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| 55 (0x37) lstore (index)
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| 56 (0x38) fstore (index)
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| 57 (0x39) dstore (index)
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| 58 (0x3a) astore (index)
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| 59 (0x3b) istore_0
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| 60 (0x3c) istore_1
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| 61 (0x3d) istore_2
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| 62 (0x3e) istore_3
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| 63 (0x3f) lstore_0
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| 64 (0x40) lstore_1
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| 65 (0x41) lstore_2
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| 66 (0x42) lstore_3
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| 67 (0x43) fstore_0
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| 68 (0x44) fstore_1
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| 69 (0x45) fstore_2
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| 70 (0x46) fstore_3
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| 71 (0x47) dstore_0
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| 72 (0x48) dstore_1
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| 73 (0x49) dstore_2
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| 74 (0x4a) dstore_3
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| 75 (0x4b) astore_0
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| 76 (0x4c) astore_1
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| 77 (0x4d) astore_2
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| 78 (0x4e) astore_3
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| 79 (0x4f) iastore
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| 80 (0x50) lastore
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| 81 (0x51) fastore
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| 82 (0x52) dastore
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| 83 (0x53) aastore
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| 84 (0x54) bastore
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| 85 (0x55) castore
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| 86 (0x56) sastore
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| </syntaxhighlight>
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|
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| = Stack =
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| ; pop: Pop from the operand stack
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| ; pop2: Pop the top one or two operand stack values
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| ; dup: Duplicate the top value on the operand stack and push the duplicated value onto the operand stack.
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| ; dup2: Duplicate the top one or two operand stack values
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| ; swap: Swap the top two operand stack values
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| <syntaxhighlight lang="lisp">
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| 87 (0x57) pop
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| 88 (0x58) pop2
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| 89 (0x59) dup
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| 90 (0x5a) dup_x1
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| 91 (0x5b) dup_x2
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| 92 (0x5c) dup2
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| 93 (0x5d) dup2_x1
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| 94 (0x5e) dup2_x2
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| 95 (0x5f) swap
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| </syntaxhighlight>
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|
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| = Math =
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| ; %add: Add two values, ..., value1, value2 → ..., result
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| ; %sub: Subtract
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| ; %mul: Multiply
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| ; %div: Divide
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| ; %rem: Remainder (取余）
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| ; %neg: Negate
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| ; %shl: Shift left
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| ; %shr: Arithmetic shift right
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| ; %ushr: Logical shift right
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| ; %and: and
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| ; %or: or
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| ; %xor: xor
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| ; %inc: Increment local variable by constant
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| <syntaxhighlight lang="lisp">
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| 96 (0x60) iadd
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| 97 (0x61) ladd
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| 98 (0x62) fadd
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| 99 (0x63) dadd
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| 100 (0x64) isub
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| 101 (0x65) lsub
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| 102 (0x66) fsub
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| 103 (0x67) dsub
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| 104 (0x68) imul
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| 105 (0x69) lmul
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| 106 (0x6a) fmul
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| 107 (0x6b) dmul
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| 108 (0x6c) idiv
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| 109 (0x6d) ldiv
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| 110 (0x6e) fdiv
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| 111 (0x6f) ddiv
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| 112 (0x70) irem
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| 113 (0x71) lrem
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| 114 (0x72) frem
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| 115 (0x73) drem
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| 116 (0x74) ineg
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| 117 (0x75) lneg
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| 118 (0x76) fneg
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| 119 (0x77) dneg
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| 120 (0x78) ishl
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| 121 (0x79) lshl
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| 122 (0x7a) ishr
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| 123 (0x7b) lshr
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| 124 (0x7c) iushr
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| 125 (0x7d) lushr
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| 126 (0x7e) iand
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| 127 (0x7f) land
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| 128 (0x80) ior
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| 129 (0x81) lor
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| 130 (0x82) ixor
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| 131 (0x83) lxor
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| 132 (0x84) iinc (index const)
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| </syntaxhighlight> | | </syntaxhighlight> |
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| = Conversions = | | <syntaxhighlight lang="java"> |
| Conversions between values. .., value → ..., result
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| <syntaxhighlight lang="lisp">
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| 133 (0x85) i2l
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| 134 (0x86) i2f
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| 135 (0x87) i2d
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| 136 (0x88) l2i
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| 137 (0x89) l2f
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| 138 (0x8a) l2d
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| 139 (0x8b) f2i
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| 140 (0x8c) f2l
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| 141 (0x8d) f2d
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| 142 (0x8e) d2i
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| 143 (0x8f) d2l
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| 144 (0x90) d2f
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| 145 (0x91) i2b
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| 146 (0x92) i2c
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| 147 (0x93) i2s
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| </syntaxhighlight> | | </syntaxhighlight> |
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| = Comparisons = | | == 默认构造函数 == |
| Compare values.
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| ; %cmp: If value1 is greater than value2, the int value 1 is pushed onto the operand stack. If value1 is equal to value2, the int value 0 is pushed onto the operand stack. If value1 is less than value2, the int value -1 is pushed onto the operand stack.
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| ; %cmplg: The fcmpg and fcmpl instructions differ only in their treatment of a comparison involving NaN.
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| ; if<cond>: Compared with the value popped from the operand stack and compared against zero. If success, the branch offset will be executed.
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| ; if_icmp<cond>: Compare values in stack ..., value1, value2 →
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| <syntaxhighlight lang="lisp"> | | <syntaxhighlight lang="lisp"> |
| 148 (0x94) lcmp
| | aload_0 |
| 149 (0x95) fcmpl
| | invokespecial #1 // Method java/lang/Object."<init>":()V |
| 150 (0x96) fcmpg
| | return |
| 151 (0x97) dcmpl
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| 152 (0x98) dcmpg
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| 153 (0x99) ifeq (branchbyte1, branchbyte2)
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| 154 (0x9a) ifne (branchbyte1, branchbyte2)
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| 155 (0x9b) iflt (branchbyte1, branchbyte2)
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| 156 (0x9c) ifge (branchbyte1, branchbyte2)
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| 157 (0x9d) ifgt (branchbyte1, branchbyte2)
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| 158 (0x9e) ifle (branchbyte1, branchbyte2)
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| 159 (0x9f) if_icmpeq (branchbyte1, branchbyte2)
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| 160 (0xa0) if_icmpne (branchbyte1, branchbyte2)
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| 161 (0xa1) if_icmplt (branchbyte1, branchbyte2)
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| 162 (0xa2) if_icmpge (branchbyte1, branchbyte2)
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| 163 (0xa3) if_icmpgt (branchbyte1, branchbyte2)
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| 164 (0xa4) if_icmple (branchbyte1, branchbyte2)
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| 165 (0xa5) if_acmpeq (branchbyte1, branchbyte2)
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| 166 (0xa6) if_acmpne (branchbyte1, branchbyte2)
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| </syntaxhighlight> | | </syntaxhighlight> |
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| = References =
| | <syntaxhighlight lang="java"> |
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| <syntaxhighlight lang="lisp"> | |
| 178 (0xb2) getstatic (indexbyte1 indexbyte2)
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| 179 (0xb3) putstatic (indexbyte1 indexbyte2)
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| 180 (0xb4) getfield (indexbyte1 indexbyte2)
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| 181 (0xb5) putfield (indexbyte1 indexbyte2)
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| 182 (0xb6) invokevirtual (indexbyte1 indexbyte2)
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| 183 (0xb7) invokespecial (indexbyte1 indexbyte2)
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| 184 (0xb8) invokestatic (indexbyte1 indexbyte2)
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| 185 (0xb9) invokeinterface (indexbyte1 indexbyte2 count 0)
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| 186 (0xba) invokedynamic (indexbyte1 indexbyte2 0 0)
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| 187 (0xbb) new (indexbyte1 indexbyte2)
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| 188 (0xbc) newarray (acode)
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| 189 (0xbd) anewarray (indexbyte1 indexbyte2)
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| 190 (0xbe) arraylength
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| 191 (0xbf) athrow
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| 192 (0xc0) checkcast (indexbyte1 indexbyte2)
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| 193 (0xc1) instanceof (indexbyte1 indexbyte2)
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| 194 (0xc2) monitorenter
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| 195 (0xc3) monitorexit
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| </syntaxhighlight>
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|
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| = Control =
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| <syntaxhighlight lang="lisp">
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| 167 (0xa7) goto (branchbyte1 branchbyte2)
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| 168 (0xa8) jsr (branchbyte1 branchbyte2)
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| 169 (0xa9) ret (index)
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| 170 (0xaa) tableswitch
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| 171 (0xab) lookupswitch
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| 172 (0xac) ireturn
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| 173 (0xad) lreturn
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| 174 (0xae) freturn
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| 175 (0xaf) dreturn
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| 176 (0xb0) areturn
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| 177 (0xb1) return
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| </syntaxhighlight> | | </syntaxhighlight> |
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| = Extended = | | = statements = |
| <syntaxhighlight lang="lisp"> | | == 创建对象== |
| 196 (0xc4) wide
| | <syntaxhighlight lang="java"> |
| 197 (0xc5) multianewarray
| | HelloWorld s = new HelloWorld(); |
| 198 (0xc6) ifnull
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| 199 (0xc7) ifnonnull
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| 200 (0xc8) goto_w
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| 201 (0xc9) jsr_w
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| </syntaxhighlight> | | </syntaxhighlight> |
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| = Reserved =
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| <syntaxhighlight lang="lisp"> | | <syntaxhighlight lang="lisp"> |
| 202 (0xca) breakpoint
| | new #5 // class HelloWorld |
| 254 (0xfe) impdep1
| | dup |
| 255 (0xff) impdep2
| | invokespecial #6 // Method "<init>":()V |
| </syntaxhighlight> | | </syntaxhighlight> |
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| * [https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-7.html|Chapter 7. Opcode Mnemonics by Opcode]
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| [[Category:JVM]] | | [[Category:JVM]] |
