Mnemonic | Opcode | Opcode (in binary) | Other bytes [count]: [operand labels] | Stack [before]→[after] | Description | |
aaload | 32 | 0011 0010 | arrayref, index → value | load onto the stack a reference from an array | 棧頂的數組下標(index)、數組引用(arrayref)出棧,並根據這兩個數值取出對應的引用型數組元素值(value)進棧。 | |
aastore | 53 | 0101 0011 | arrayref, index, value → | store into a reference in an array | 棧頂的引用型數值(value)、數組下標(index)、數組引用(arrayref)出棧,將數值存入對應的數組元素中。 | |
aconst_null | 1 | 0000 0001 | → null | 將null對象引用壓入棧 | ||
aload | 19 | 0001 1001 | 1: index | → objectref | 將位置爲#index的局部變量中引用類型數據壓棧 | |
aload_0 | 2a | 0010 1010 | → objectref | 將位置爲0的局部變量中引用類型數據壓棧 | ||
aload_1 | 2b | 0010 1011 | → objectref | 將位置爲1的局部變量中引用類型數據壓棧 | ||
aload_2 | 2c | 0010 1100 | → objectref | 將位置爲2的局部變量中引用類型數據壓棧 | ||
aload_3 | 2d | 0010 1101 | → objectref | 將位置爲3的局部變量中引用類型數據壓棧 | ||
anewarray | bd | 1011 1101 | 2: indexbyte1, indexbyte2 | count → arrayref | create a new array of references of length count and component type identified by the class reference index (indexbyte1 << 8 + indexbyte2) in the constant pool | 創建以棧頂值爲長度,常量池中索引(indexbyte1 << 8 + indexbyte2)對應標識爲組件類型的引用型數組,引用壓棧 |
areturn | b0 | 1011 0000 | objectref → [empty] | return a reference from a method | 從方法中返回一個對象的引用(彈出棧頂元素) 如果當前方法是synchronized方法,並且當前線程不是改方法的鎖的擁有者,會拋出 IllegalMonitorStateException。(未驗證) | |
arraylength | be | 1011 1110 | arrayref → length | get the length of an array | ||
astore | 3a | 0011 1010 | 1: index | objectref → | 彈出棧頂引用型元素存入位置爲#index的局部變量中 | |
astore_0 | 4b | 0100 1011 | objectref → | 彈出棧頂引用型元素存入位置爲0的局部變量中 | ||
astore_1 | 4c | 0100 1100 | objectref → | 彈出棧頂引用型元素存入位置爲1的局部變量中 | ||
astore_2 | 4d | 0100 1101 | objectref → | 彈出棧頂引用型元素存入位置爲2的局部變量中 | ||
astore_3 | 4e | 0100 1110 | objectref → | 彈出棧頂引用型元素存入位置爲3的局部變量中 | ||
athrow | bf | 1011 1111 | objectref → [empty], objectref | throws an error or exception (notice that the rest of the stack is cleared, leaving only a reference to the Throwable) | ||
baload | 33 | 0011 0011 | arrayref, index → value | load a byte or Boolean value from an array | ||
bastore | 54 | 0101 0100 | arrayref, index, value → | store a byte or Boolean value into an array | ||
bipush | 10 | 0001 0000 | 1: byte | → value | 將byte類型的數轉換爲int類型的數,然後壓入棧 | |
breakpoint | ca | 1100 1010 | reserved for breakpoints in Java debuggers; should not appear in any class file | |||
caload | 34 | 0011 0100 | arrayref, index → value | load a char from an array | ||
castore | 55 | 0101 0101 | arrayref, index, value → | store a char into an array | ||
checkcast | c0 | 1100 0000 | 2: indexbyte1, indexbyte2 | objectref → objectref | checks whether an objectref is of a certain type, the class reference of which is in the constant pool at index (indexbyte1 << 8 + indexbyte2) | |
d2f | 90 | 1001 0000 | value → result | convert a double to a float | ||
d2i | 8e | 1000 1110 | value → result | convert a double to an int | ||
d2l | 8f | 1000 1111 | value → result | convert a double to a long | ||
dadd | 63 | 0110 0011 | value1, value2 → result | add two doubles | ||
daload | 31 | 0011 0001 | arrayref, index → value | load a double from an array | ||
dastore | 52 | 0101 0010 | arrayref, index, value → | store a double into an array | 棧頂的double型數值(value)、數組下標(index)、數組引用(arrayref)出棧,將數值存入對應的數組元素中。 | |
dcmpg | 98 | 1001 1000 | value1, value2 → result | compare two doubles | ||
dcmpl | 97 | 1001 0111 | value1, value2 → result | compare two doubles | ||
dconst_0 | 0e | 0000 1110 | → 0.0 | push the constant 0.0 (a double) onto the stack | ||
dconst_1 | 0f | 0000 1111 | → 1.0 | push the constant 1.0 (a double) onto the stack | ||
ddiv | 6f | 0110 1111 | value1, value2 → result | divide two doubles | ||
dload | 18 | 0001 1000 | 1: index | → value | load a double value from a local variable #index | |
dload_0 | 26 | 0010 0110 | → value | load a double from local variable 0 | ||
dload_1 | 27 | 0010 0111 | → value | load a double from local variable 1 | ||
dload_2 | 28 | 0010 1000 | → value | load a double from local variable 2 | ||
dload_3 | 29 | 0010 1001 | → value | load a double from local variable 3 | ||
dmul | 6b | 0110 1011 | value1, value2 → result | multiply two doubles | ||
dneg | 77 | 0111 0111 | value → result | negate a double | ||
drem | 73 | 0111 0011 | value1, value2 → result | get the remainder from a division between two doubles | ||
dreturn | af | 1010 1111 | value → [empty] | return a double from a method | ||
dstore | 39 | 0011 1001 | 1: index | value → | store a double value into a local variable #index | 彈出棧頂double型數值存入第index個局部變量 |
dstore_0 | 47 | 0100 0111 | value → | store a double into local variable 0 | 彈出棧頂double型數值存入第1個局部變量 | |
dstore_1 | 48 | 0100 1000 | value → | store a double into local variable 1 | 彈出棧頂double型數值存入第2個局部變量 | |
dstore_2 | 49 | 0100 1001 | value → | store a double into local variable 2 | 彈出棧頂double型數值存入第3個局部變量 | |
dstore_3 | 4a | 0100 1010 | value → | store a double into local variable 3 | 彈出棧頂double型數值存入第4個局部變量 | |
dsub | 67 | 0110 0111 | value1, value2 → result | subtract a double from another | ||
dup | 59 | 0101 1001 | value → value, value | 複製棧頂部的值,隨後壓棧 | ||
dup_x1 | 5a | 0101 1010 | value2, value1 → value1, value2, value1 | insert a copy of the top value into the stack two values from the top. value1 and value2 must not be of the type double or long. | ||
dup_x2 | 5b | 0101 1011 | value3, value2, value1 → value1, value3, value2, value1 | insert a copy of the top value into the stack two (if value2 is double or long it takes up the entry of value3, too) or three values (if value2 is neither double nor long) from the top | ||
dup2 | 5c | 0101 1100 | {value2, value1} → {value2, value1}, {value2, value1} | duplicate top two stack words (two values, if value1 is not double nor long; a single value, if value1 is double or long) | ||
dup2_x1 | 5d | 0101 1101 | value3, {value2, value1} → {value2, value1}, value3, {value2, value1} | duplicate two words and insert beneath third word (see explanation above) | ||
dup2_x2 | 5e | 0101 1110 | {value4, value3}, {value2, value1} → {value2, value1}, {value4, value3}, {value2, value1} | duplicate two words and insert beneath fourth word | ||
f2d | 8d | 1000 1101 | value → result | convert a float to a double | ||
f2i | 8b | 1000 1011 | value → result | convert a float to an int | ||
f2l | 8c | 1000 1100 | value → result | convert a float to a long | ||
fadd | 62 | 0110 0010 | value1, value2 → result | 從棧頂彈出兩個float型元素然後做加法,把結果壓入棧 | ||
faload | 30 | 0011 0000 | arrayref, index → value | load a float from an array | ||
fastore | 51 | 0101 0001 | arrayref, index, value → | store a float in an array | 棧頂的float型數值(value)、數組下標(index)、數組引用(arrayref)出棧,將數值存入對應的數組元素中。 | |
fcmpg | 96 | 1001 0110 | value1, value2 → result | compare two floats | ||
fcmpl | 95 | 1001 0101 | value1, value2 → result | compare two floats | ||
fconst_0 | 0b | 0000 1011 | → 0.0f | float類型常量0.0f入棧 | ||
fconst_1 | 0c | 0000 1100 | → 1.0f | float類型常量1.0f入棧 | ||
fconst_2 | 0d | 0000 1101 | → 2.0f | float類型常量2.0f入棧 | ||
fdiv | 6e | 0110 1110 | value1, value2 → result | divide two floats | ||
fload | 17 | 0001 0111 | 1: index | → value | 從位置爲#index的局部變量中取出float類型的元素壓入棧 | |
fload_0 | 22 | 0010 0010 | → value | 從位置爲0的局部變量中取出float類型的元素壓入棧 | ||
fload_1 | 23 | 0010 0011 | → value | 從位置爲1的局部變量中取出float類型的元素壓入棧 | ||
fload_2 | 24 | 0010 0100 | → value | 從位置爲2的局部變量中取出float類型的元素壓入棧 | ||
fload_3 | 25 | 0010 0101 | → value | 從位置爲3的局部變量中取出float類型的元素壓入棧 | ||
fmul | 6a | 0110 1010 | value1, value2 → result | multiply two floats | ||
fneg | 76 | 0111 0110 | value → result | negate a float | ||
frem | 72 | 0111 0010 | value1, value2 → result | get the remainder from a division between two floats | ||
freturn | ae | 1010 1110 | value → [empty] | return a float | ||
fstore | 38 | 0011 1000 | 1: index | value → | 彈出棧頂float類型元素存入位置爲#index的局部變量中 | |
fstore_0 | 43 | 0100 0011 | value → | 彈出棧頂float類型元素存入位置爲0的局部變量中 | ||
fstore_1 | 44 | 0100 0100 | value → | 彈出棧頂float類型元素存入位置爲1的局部變量中 | ||
fstore_2 | 45 | 0100 0101 | value → | 彈出棧頂float類型元素存入位置爲2的局部變量中 | ||
fstore_3 | 46 | 0100 0110 | value → | 彈出棧頂float類型元素存入位置爲3的局部變量中 | ||
fsub | 66 | 0110 0110 | value1, value2 → result | subtract two floats | ||
getfield | b4 | 1011 0100 | 2: indexbyte1, indexbyte2 | objectref → value | get a field value of an object objectref, where the field is identified by field reference in the constant pool index (indexbyte1 << 8 + indexbyte2) | |
getstatic | b2 | 1011 0010 | 2: indexbyte1, indexbyte2 | → value | get a static field value of a class, where the field is identified by field reference in the constant pool index (indexbyte1 << 8 + indexbyte2) | 獲取類的靜態字段值,其中字段由常量池索引(indexbyte1 << 8 + indexbyte2)的字段引用標識,並將其值壓入棧頂 |
goto | a7 | 1010 0111 | 2: branchbyte1, branchbyte2 | [no change] | get a static field value of a class, where the field is identified by field reference in the constant pool index (indexbyte1 << 8 + indexbyte2) | 轉到branchoffset上的另一條指令(指令通過無符號字節branchbyte1 << 8 + branchbyte2尋址) |
goto_w | c8 | 1100 1000 | 4: branchbyte1, branchbyte2, branchbyte3, branchbyte4 | [no change] | goes to another instruction at branchoffset (signed int constructed from unsigned bytes branchbyte1 << 24 + branchbyte2 << 16 + branchbyte3 << 8 + branchbyte4) | |
i2b | 91 | 1001 0001 | value → result | convert an int into a byte | ||
i2c | 92 | 1001 0010 | value → result | convert an int into a character | ||
i2d | 87 | 1000 0111 | value → result | convert an int into a double | ||
i2f | 86 | 1000 0110 | value → result | convert an int into a float | ||
i2l | 85 | 1000 0101 | value → result | convert an int into a long | ||
i2s | 93 | 1001 0011 | value → result | convert an int into a short | ||
iadd | 60 | 0110 0000 | value1, value2 → result | 從棧頂彈出兩個元素然後做加法,把結果壓入棧 | ||
iaload | 2e | 0010 1110 | arrayref, index → value | load an int from an array | 棧頂的數組下標(index)、數組引用(arrayref)出棧,並根據這兩個數值取出對應的int型數組元素值(value)進棧。 | |
iand | 7e | 0111 1110 | value1, value2 → result | perform a bitwise AND on two integers | ||
iastore | 4f | 0100 1111 | arrayref, index, value → | store an int into an array | 棧頂的int型數值(value)、數組下標(index)、數組引用(arrayref)出棧,將數值存入對應的數組元素中。 | |
iconst_m1 | 2 | 0000 0010 | → -1 | load the int value −1 onto the stack | ||
iconst_0 | 3 | 0000 0011 | → 0 | 將int值0壓棧 | ||
iconst_1 | 4 | 0000 0100 | → 1 | 將int值1壓棧 | ||
iconst_2 | 5 | 0000 0101 | → 2 | 將int值2壓棧 | ||
iconst_3 | 6 | 0000 0110 | → 3 | 將int值3壓棧 | ||
iconst_4 | 7 | 0000 0111 | → 4 | 將int值4壓棧 | ||
iconst_5 | 8 | 0000 1000 | → 5 | 將int值5壓棧 | ||
idiv | 6c | 0110 1100 | value1, value2 → result | divide two integers | ||
if_acmpeq | a5 | 1010 0101 | 2: branchbyte1, branchbyte2 | value1, value2 → | if references are equal, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
if_acmpne | a6 | 1010 0110 | 2: branchbyte1, branchbyte2 | value1, value2 → | if references are not equal, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | 如果棧頂兩個引用不相等,則跳轉到branchoffset上的指令(位置branchbyte1 << 8 + branchbyte2) |
if_icmpeq | 9f | 1001 1111 | 2: branchbyte1, branchbyte2 | value1, value2 → | if ints are equal, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
if_icmpge | a2 | 1010 0010 | 2: branchbyte1, branchbyte2 | value1, value2 → | if value1 is greater than or equal to value2, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | 比較棧頂兩int(value1,value2棧頂元素)型數值大小,當value1 >= value2,則跳轉到branchoffset處的指令(由無符號字節branchbyte1 << 8 + branchbyte2構造) |
if_icmpgt | a3 | 1010 0011 | 2: branchbyte1, branchbyte2 | value1, value2 → | if value1 is greater than value2, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
if_icmple | a4 | 1010 0100 | 2: branchbyte1, branchbyte2 | value1, value2 → | if value1 is less than or equal to value2, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | 比較棧頂兩int(value1,value2棧頂元素)型數值大小,當value1 <= value2,則跳轉到branchoffset處的指令(由無符號字節branchbyte1 << 8 + branchbyte2構造) |
if_icmplt | a1 | 1010 0001 | 2: branchbyte1, branchbyte2 | value1, value2 → | if value1 is less than value2, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
if_icmpne | a0 | 1010 0000 | 2: branchbyte1, branchbyte2 | value1, value2 → | if ints are not equal, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
ifeq | 99 | 1001 1001 | 2: branchbyte1, branchbyte2 | value → | if value is 0, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | 當棧頂int型數值等於0時跳轉 |
ifge | 9c | 1001 1100 | 2: branchbyte1, branchbyte2 | value → | if value is greater than or equal to 0, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
ifgt | 9d | 1001 1101 | 2: branchbyte1, branchbyte2 | value → | if value is greater than 0, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
ifle | 9e | 1001 1110 | 2: branchbyte1, branchbyte2 | value → | if value is less than or equal to 0, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
iflt | 9b | 1001 1011 | 2: branchbyte1, branchbyte2 | value → | if value is less than 0, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
ifne | 9a | 1001 1010 | 2: branchbyte1, branchbyte2 | value → | if value is not 0, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
ifnonnull | c7 | 1100 0111 | 2: branchbyte1, branchbyte2 | value → | if value is not null, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
ifnull | c6 | 1100 0110 | 2: branchbyte1, branchbyte2 | value → | if value is null, branch to instruction at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) | |
iinc | 84 | 1000 0100 | 2: index, const | [No change] | increment local variable #index by signed byte const | 局部變量#index增加指定的值 |
iload | 15 | 0001 0101 | 1: index | → value | 從位置爲#index的局部變量中取出元素int類型的值壓入棧 | |
iload_0 | 1a | 0001 1010 | → value | 從位置爲0的局部變量中取出元素int類型的值壓入棧 | ||
iload_1 | 1b | 0001 1011 | → value | 從位置爲1的局部變量中取出元素int類型的值壓入棧 | ||
iload_2 | 1c | 0001 1100 | → value | 從位置爲2的局部變量中取出元素int類型的值壓入棧 | ||
iload_3 | 1d | 0001 1101 | → value | 從位置爲3的局部變量中取出元素int類型的值壓入棧 | ||
impdep1 | fe | 1111 1110 | reserved for implementation-dependent operations within debuggers; should not appear in any class file | |||
impdep2 | ff | 1111 1111 | reserved for implementation-dependent operations within debuggers; should not appear in any class file | |||
imul | 68 | 0110 1000 | value1, value2 → result | multiply two integers | ||
ineg | 74 | 0111 0100 | value → result | negate int | ||
instanceof | c1 | 1100 0001 | 2: indexbyte1, indexbyte2 | objectref → result | determines if an object objectref is of a given type, identified by class reference index in constant pool (indexbyte1 << 8 + indexbyte2) | |
invokedynamic | ba | 1011 1010 | 4: indexbyte1, indexbyte2, 0, 0 | [arg1, [arg2 ...]] → result | invokes a dynamic method and puts the result on the stack (might be void); the method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2) | |
invokeinterface | b9 | 1011 1001 | 4: indexbyte1, indexbyte2, count, 0 | objectref, [arg1, arg2, ...] → result | invokes an interface method on object objectref and puts the result on the stack (might be void); the interface method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2) | 調用對象objectref的接口方法並將結果放入堆棧(可能爲void); 接口方法由常量池中的方法引用索引標識(indexbyte1 << 8 + indexbyte2) |
invokespecial | b7 | 1011 0111 | 2: indexbyte1, indexbyte2 | objectref, [arg1, arg2, ...] → result | invoke instance method on object objectref and puts the result on the stack (might be void); the method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2) | |
invokestatic | b8 | 1011 1000 | 2: indexbyte1, indexbyte2 | [arg1, arg2, ...] → result | invoke a static method and puts the result on the stack (might be void); the method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2) | 調用一個靜態方法並把結果放到堆棧上(可能是void); 該方法由常量池中的方法引用索引標識(indexbyte1 << 8 + indexbyte2) |
invokevirtual | b6 | 1011 0110 | 2: indexbyte1, indexbyte2 | objectref, [arg1, arg2, ...] → result | invoke virtual method on object objectref and puts the result on the stack (might be void); the method is identified by method reference index in constant pool (indexbyte1 << 8 + indexbyte2) | |
ior | 80 | 1000 0000 | value1, value2 → result | bitwise int OR | ||
irem | 70 | 0111 0000 | value1, value2 → result | logical int remainder | ||
ireturn | ac | 1010 1100 | value → [empty] | 返回棧頂的int值 | ||
ishl | 78 | 0111 1000 | value1, value2 → result | int shift left | ||
ishr | 7a | 0111 1010 | value1, value2 → result | int arithmetic shift right | ||
istore | 36 | 0011 0110 | 1: index | value → | 彈出棧頂int元素存入位置爲#index的局部變量中 | |
istore_0 | 3b | 0011 1011 | value → | 彈出棧頂int元素存入位置0的局部變量中 | ||
istore_1 | 3c | 0011 1100 | value → | 彈出棧頂int元素存入位置1的局部變量中 | ||
istore_2 | 3d | 0011 1101 | value → | 彈出棧頂int元素存入位置2的局部變量中 | ||
istore_3 | 3e | 0011 1110 | value → | 彈出棧頂int元素存入位置3的局部變量中 | ||
isub | 64 | 0110 0100 | value1, value2 → result | int subtract | ||
iushr | 7c | 0111 1100 | value1, value2 → result | int logical shift right | ||
ixor | 82 | 1000 0010 | value1, value2 → result | int xor | ||
jsr | a8 | 1010 1000 | 2: branchbyte1, branchbyte2 | → address | jump to subroutine at branchoffset (signed short constructed from unsigned bytes branchbyte1 << 8 + branchbyte2) and place the return address on the stack | |
jsr_w | c9 | 1100 1001 | 4: branchbyte1, branchbyte2, branchbyte3, branchbyte4 | → address | jump to subroutine at branchoffset (signed int constructed from unsigned bytes branchbyte1 << 24 + branchbyte2 << 16 + branchbyte3 << 8 + branchbyte4) and place the return address on the stack | |
l2d | 8a | 1000 1010 | value → result | convert a long to a double | ||
l2f | 89 | 1000 1001 | value → result | convert a long to a float | ||
l2i | 88 | 1000 1000 | value → result | convert a long to a int | ||
ladd | 61 | 0110 0001 | value1, value2 → result | add two longs | ||
laload | 2f | 0010 1111 | arrayref, index → value | load a long from an array | ||
land | 7f | 0111 1111 | value1, value2 → result | bitwise AND of two longs | ||
lastore | 50 | 0101 0000 | arrayref, index, value → | store a long to an array | 棧頂的long型數值(value)、數組下標(index)、數組引用(arrayref)出棧,將數值存入對應的數組元素中。 | |
lcmp | 94 | 1001 0100 | value1, value2 → result | push 0 if the two longs are the same, 1 if value1 is greater than value2, -1 otherwise | ||
lconst_0 | 9 | 0000 1001 | → 0L | long類型常量0L入棧 | ||
lconst_1 | 0a | 0000 1010 | → 1L | long類型常量1L入棧 | ||
ldc | 12 | 0001 0010 | 1: index(無符號8位數indexbyte) | → value | push a constant #index from a constant pool (String, int, float, Class, java.lang.invoke.MethodType, or java.lang.invoke.MethodHandle) onto the stack | 從由index指向的常量池入口中取出值(可能是String int float等),然後將其壓入棧 |
ldc_w | 13 | 0001 0011 | 2: indexbyte1, indexbyte2(無符號16位數indexshort,wide index is constructed as indexbyte1 << 8 + indexbyte2) | → value | push a constant #index from a constant pool (String, int, float, Class, java.lang.invoke.MethodType, or java.lang.invoke.MethodHandle) onto the stack (wide index is constructed as indexbyte1 << 8 + indexbyte2) | 從由indexbyte1 << 8 + indexbyte2指向的常量池入口中取值,然後將其壓入棧 |
ldc2_w | 14 | 0001 0100 | 2: indexbyte1, indexbyte2 | → value | push a constant #index from a constant pool (double or long) onto the stack (wide index is constructed as indexbyte1 << 8 + indexbyte2) | 將indexbyte1 << 8 + indexbyte2指向的常量取出(8個字節),然後將其壓入棧 |
ldiv | 6d | 0110 1101 | value1, value2 → result | divide two longs | ||
lload | 16 | 0001 0110 | 1: index | → value | 從位置爲#index和#index+1的局部變量中取出long類型元素壓入棧 | |
lload_0 | 1e | 0001 1110 | → value | 從位置爲0,1的局部變量中取出long類型元素壓入棧 | ||
lload_1 | 1f | 0001 1111 | → value | 從位置爲1,2的局部變量中取出long類型元素壓入棧 | ||
lload_2 | 20 | 0010 0000 | → value | 從位置爲2,3的局部變量中取出long類型元素壓入棧 | ||
lload_3 | 21 | 0010 0001 | → value | 從位置爲3,4的局部變量中取出long類型元素壓入棧 | ||
lmul | 69 | 0110 1001 | value1, value2 → result | multiply two longs | ||
lneg | 75 | 0111 0101 | value → result | negate a long | ||
lookupswitch | ab | 1010 1011 | 8+: <0–3 bytes padding>, defaultbyte1, defaultbyte2, defaultbyte3, defaultbyte4, npairs1, npairs2, npairs3, npairs4, match-offset pairs... | key → | a target address is looked up from a table using a key and execution continues from the instruction at that address | |
lor | 81 | 1000 0001 | value1, value2 → result | bitwise OR of two longs | ||
lrem | 71 | 0111 0001 | value1, value2 → result | remainder of division of two longs | ||
lreturn | ad | 1010 1101 | value → [empty] | return a long value | ||
lshl | 79 | 0111 1001 | value1, value2 → result | bitwise shift left of a long value1 by int value2 positions | ||
lshr | 7b | 0111 1011 | value1, value2 → result | bitwise shift right of a long value1 by int value2 positions | ||
lstore | 37 | 0011 0111 | 1: index | value → | store a long value in a local variable #index | 彈出棧頂long型元素存入位置爲#index的局部變量中(但是每個Solt4個字節,所以這個會跨兩個變量,其他的指令類似佔據#index和#index+1號變量) |
lstore_0 | 3f | 0011 1111 | value → | 彈出棧頂long型元素存入位置爲0,1的局部變量表中 | ||
lstore_1 | 40 | 0100 0000 | value → | 彈出棧頂long型元素存入位置爲1,2的局部變量表中 | ||
lstore_2 | 41 | 0100 0001 | value → | 彈出棧頂long型元素存入位置爲2,3的局部變量表中 | ||
lstore_3 | 42 | 0100 0010 | value → | 彈出棧頂long型元素存入位置爲3,4的局部變量表中 | ||
lsub | 65 | 0110 0101 | value1, value2 → result | subtract two longs | ||
lushr | 7d | 0111 1101 | value1, value2 → result | bitwise shift right of a long value1 by int value2 positions, unsigned | ||
lxor | 83 | 1000 0011 | value1, value2 → result | bitwise XOR of two longs | ||
monitorenter | c2 | 1100 0010 | objectref → | enter monitor for object ("grab the lock" – start of synchronized() section) | ||
monitorexit | c3 | 1100 0011 | objectref → | exit monitor for object ("release the lock" – end of synchronized() section) | ||
multianewarray | c5 | 1100 0101 | 3: indexbyte1, indexbyte2, dimensions | count1, [count2,...] → arrayref | create a new array of dimensions dimensions of type identified by class reference in constant pool index (indexbyte1 << 8 + indexbyte2); the sizes of each dimension is identified by count1, [count2, etc.] | |
new | bb | 1011 1011 | 2: indexbyte1, indexbyte2 | → objectref | create new object of type identified by class reference in constant pool index (indexbyte1 << 8 + indexbyte2) | 創建索引號爲(indexbyte1 << 8 + indexbyte2)類引用標識的對象,並將引用壓棧 |
newarray | bc | 1011 1100 | 1: atype | count → arrayref | create new array with count elements of primitive type identified by atype | |
nop | 0 | 0000 0000 | [No change] | perform no operation | ||
pop | 57 | 0101 0111 | value → | discard the top value on the stack | ||
pop2 | 58 | 0101 1000 | {value2, value1} → | discard the top two values on the stack (or one value, if it is a double or long) | ||
putfield | b5 | 1011 0101 | 2: indexbyte1, indexbyte2 | objectref, value → | set field to value in an object objectref, where the field is identified by a field reference index in constant pool (indexbyte1 << 8 + indexbyte2) | |
putstatic | b3 | 1011 0011 | 2: indexbyte1, indexbyte2 | value → | set static field to value in a class, where the field is identified by a field reference index in constant pool (indexbyte1 << 8 + indexbyte2) | 設置類中值靜態字段,字段由常量池中的字段引用索引(indexbyte1 << 8 + indexbyte2)標識 |
ret | a9 | 1010 1001 | 1: index | [No change] | continue execution from address taken from a local variable #index (the asymmetry with jsr is intentional) | |
return | b1 | 1011 0001 | → [empty] | return void from method | 當前方法返回void | |
saload | 35 | 0011 0101 | arrayref, index → value | load short from array | ||
sastore | 56 | 0101 0110 | arrayref, index, value → | store short to array | ||
sipush | 11 | 0001 0001 | 2: byte1, byte2 | → value | 將一個短整型值作爲整數值壓棧 | |
swap | 5f | 0101 1111 | value2, value1 → value1, value2 | swaps two top words on the stack (note that value1 and value2 must not be double or long) | ||
tableswitch | aa | 1010 1010 | 16+: [0–3 bytes padding], defaultbyte1, defaultbyte2, defaultbyte3, defaultbyte4, lowbyte1, lowbyte2, lowbyte3, lowbyte4, highbyte1, highbyte2, highbyte3, highbyte4, jump offsets... | index → | continue execution from an address in the table at offset index | |
wide | c4 | 1100 0100 | 3/5: opcode, indexbyte1, indexbyte2 | [same as for corresponding instructions] | execute opcode, where opcode is either iload, fload, aload, lload, dload, istore, fstore, astore, lstore, dstore, or ret, but assume the index is 16 bit; or execute iinc, where the index is 16 bits and the constant to increment by is a signed 16 bit short | |
or | ||||||
(no name) | cb-fd | these values are currently unassigned for opcodes and are reserved for future use | ||||
Java字節碼指令列表
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