2DABAN AUTOMATION

Discussions compilation of the purpose of general register 1, EAX and AX: accumulator, all the I / O instructions to use it to send information to external device 2, EBX, and BX: in calculating the storage unit is often used as a base address register address 3 ECX and CX: save the count value 4, EDX and DX: four words or word operation done, you can put EDX (DX) and EAX (AX) stored together a four-character or word length of data in a certain These I / O operation, DX can put I / O port address 5, ESP and SP: Stack stack pointer. 6, EBP and BP: base address register 7, . by deepfuture replies (0) WIN32 compilation of assembly language in the resolution sizeofwin32 win32 compilation of sizeof is different from other languages, sizeof, this is the real sizeof to bytes. Facie case szhello db 'hello, world!', 0mov eax, sizeof szhelloeax =? Answer is eax = 13 because hello, world! Is 13 bytes, and then account for a 0, it is a prefix meaning 13 of the variable naming style b bytew wor . by deepfuture replies (0) virtual machine with about (a): the interpreter, tree times . (Disclaimer: If you need to reprint please me; paper, please do not direct link images Of: RednaxelaFX -> rednaxelafx.javaeye.com) Before that receive a PM: Reference Hello, very presumptuous Send PM to you, I am now looking at JS engine, will find that you have on the js engine blog is very understanding, I would like to ask your parser stack-based parser based on what register the same, javascriptcore


is based on the register, V8 is based on the stack . by RednaxelaFX replies (43) conclusions, given the arguments (a) Related links: Conclusions, given the argument (b) rainbow686 students at the forum made such a quote, java than. net (C #) slow so how? , Led the discussion. Replies conclusions but did not throw in the lack of any argument. A lot of myth is in this a pass to ten, hundred, according to the conclusions, whether produced; this phenomenon is good to avoid. rainbow686 students a set of comparison tests carried out to produce a set of operating results, and draw a "really is. net (3.5) is more efficient than java (5.0) much higher" conclusion . by RednaxelaFX replies (1) basic types by value Taobao set the C ( ) day after tomorrow to arrive. Down from the Internet C Primer e-book look. Look for the feeling of C first. Look at the basic types by value: Wrote three methods. Decompile look. void fun1 (int a) {a; } void fun2 (int
First, the data transfer instructions and registers them in memory, registers, and transfer data between input and output ports. 1. General data transfer instruction MOV word or byte transfer. MOVSX first sign extension, re-transmission. MOVZX first zero-extended, re-transmission. PUSH to put words in the stack. POP the word pop up the stack. PUSHA the AX, CX, DX, BX, SP, BP, SI, DI and then onto the stack. POPA the DI, SI, BP, SP, BX, DX, CX, AX followed by the pop-up stack. PUSHAD the EAX, ECX, EDX, EBX, ESP, EBP, ESI , EDI order of the stack. POPAD to EDI, ESI, EBP, ESP, EBX, EDX, ECX, EAX and then the pop-up stack. BSWAP exchange 32-bit register in the order of bytes XCHG exchange words or bytes. (at least one operation number of registers, segment registers are not as operands) CMPXCHG compare and exchange operation number. (the second operand must be the accumulator AL / AX / EAX) XADD first exchange and then accumulate. (results in the first operand in) XLAT byte look-up table conversion. BX points to a starting point for a table of 256 bytes, AL for the table index values (0-255, that is 0-FFH); return to the results of AL as a look-up table. (BX AL-OP2) JA / JNBE not less than or equal to when the transfer .JAE / JNB greater than or equal to the transfer of .JB / JNAE less than the transfer .JBE / JNA less than or equal to the transfer. more four, the test results of an unsigned integer (symbol C and Z) .JG / JNLE than transfer .JGE / JNL greater than or equal to the transfer of .JL / JNGE less than the transfer .JLE / JNG less than or equal to the transfer. more than four test results signed integer (symbol S, O and Z) .JE / JZ equal to the transfer .JNE / JNZ when the transfer is not equal. JC transfer when a carry. JNC when no carry transfer. JNO when the transfer does not overflow. JNP / JPO parity is odd transfer. JNS sign bit is "0" when the transfer. JO overflow transfer .JP / JPE parity is even, the transfer. JS sign bit is "1" when the transfer . loop control instruction (short transfer) LOOP CX is not zero, loop .LOOPE / LOOPZ CX is not zero and the flag Z = 1 when the loop .LOOPNE / LOOPNZ CX is not zero and the flag Z = 0 when the loop. JCXZ CX zero transfer. JECXZ ECX is zero transfer . interrupt instruction overflow interrupt INT INTO IRET instruction interrupt interrupt return HLT processor, the processor control instructions to suspend, until interrupt or reset signal before continuing. WAIT TEST is high when the chip lead when the CPU entered wait state. ESC switch to the external processor. LOCK blocking bus. NOP op. STC Set carry flag. CLC clear carry flag. CMC carry flag negated. STD Set direction flag. CLD clear direction flag. STI Set Interrupt enable bit. CLI clear interrupt enable bit. VI DW directive definition of the word (2 bytes). PROC definition process. ENDP end of the process. SEGMENT definitions section. ASSUME establishment of segment register addressing. ENDS segment end. END end of the process. VII , processor control instructions: flag processing instruction CLC (carry bit 0 command) CMC (carry bit negate instruction) STC (carry bit to 1 instruction) CLD (direction flag is set a command) STD (direction flag a directive) CLI ( Interrupt flag set to 0, instruction) STI (set interrupt flag 1 instruction) NOP (no operation) HLT (shutdown) WAIT (Wait) ESC (escape) LOCK (block) entries Atlas Atlas more