Inc word ptr的寻址方式
Web1 依据位移进行转移的call指令. call标号 (将当前IP压栈后,转到标号处执行指令) CPU执行此种格式的call指令时,进行如下的操作:. 1) (sp) = (sp) - 2. ( (ss)* 16 + (sp)) = (IP) 2) (IP) = (IP) + 16位位移. 16位位移 = 标号处的地址 - call指令后的第一个字节的地址; 16位位移的范围 … WebJan 29, 2010 · INC WORD PTR [BX]的操作数寻址方式是基址寻址,基址寄存器BX所指定的操作数类型不确定,而指令要求必须是明确的。. 此处“WORD”表示操作数类型是一个字(双字节)。. x86 CPU 可以执行 16 位数的指令,也可以执行 8 位数的指令。. 在指令中,你如果不说 …
Inc word ptr的寻址方式
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WebMar 15, 2024 · dword ptr [eax] - points to memory, which address is eax, so this statement copies 32 bit value from memory to eax. About the why this would happen, it depends on the context. For example, this could be used to load the value of [eax] on the stack, to use it as an argument for a function call. WebOct 24, 2010 · inc word ptr ds:[0] add word ptr [bx],2. 下面的指令中,用 byte ptr 指明了指令访问的内存单元是一个字单元: mov byte ptr ds:[0],1. inc byte ptr [bx] inc byte ptr ds:[0] …
http://yimitumi.com/2024/03/30/%E5%8D%81%E4%B9%9D-word-ptr-%E5%92%8C-byte-ptr-%E6%B1%87%E7%BC%96%E7%AC%94%E8%AE%B0/ WebAug 5, 2024 · 常用汇编指令 word ptr 与 byte ptr word ptr指明了指令访问的内存单元是一个字单元。 byte ptr指明了指令访问的内存单元是一个字节单元。 dword ptr指令访问的内 …
WebFind changesets by keywords (author, files, the commit message), revision number or hash, or revset expression. WebJan 4, 2024 · 指令格式、对操作数的要求、对标志位的影响与ADD指令完全一样. 指令的操作:OPRD1+OPRD2+CF——>OPRD1. ADC指令多用于多字节数相加,使用前要先将CF清零. 3.INC指令. 格式:INC OPRD (OPRD不能是段寄存器,不能是立即数). 操作: OPRD+1——>OPRD. INC指令的执行不影响CF ...
Web展开全部. BYTE PTR和WORD PTR分别意思如下所示. BYTE PTR 表示 [DI]处一个字节,指明了指令访问的内存单元是一个字节单元,也就是8位,也就是最大的数为 0FFH,化成10进制数为256。. 指令访问的是内存,是因为加方括号的都是存储器寻址,方括号里的DI是变址寄 …
Web// We assume that a smart pointer (Ptr) to a relevant network device // is in hand; here, it is the net0 pointer. // 1. Pointer-based access // // One way to change the value is to access … the tulpa effectWeb例10:jmp bx jmp word ptr [bx]+1234h 这种寻址方式是在寄存器或存储器中找到要转移到的地址,而地址是16bit的,因而寄存器必须为16bit,如:bx,我们用word ptr来指定存储器单元也是16bit的。注意:它是间接的给出,只能使用类似于数据操作数中的除立即寻址以外的6 … sewing room ironing stationWebJun 7, 2010 · The dword ptr part is called a size directive. This page explains them, but it wasn't possible to direct-link to the correct section. Basically, it means "the size of the target operand is 32 bits", so this will bitwise-AND the 32-bit value at the address computed by taking the contents of the ebp register and subtracting four with 0. The "d ... sewing room ideas on a budgetWebJan 29, 2010 · inc word ptr[bx]的操作数寻址方式是基址寻址,基址寄存器bx所指定的操作数类型不确定,而指令要求必须是明确的。 此处“WORD”表示操作数类型是一个字(双字 … sewing room layout 10x12WebStudy with Quizlet and memorize flashcards containing terms like 21. The following statement will assemble without errors: mov WORD PTR [eax], 1234h, 22. The following instruction will produce FFFFFFFCh in EAX: movsx eax,-4, 23. The SAHF instruction copies the Sign, Overflow, and Carry flags to the AL register. and more. sewing room ideas youtubeWebApr 8, 2024 · Then add word ptr [freq_array + eax * 2], 1. In 32-bit code you can take advantage of its more powerful addressing modes (compared to 16-bit). Also note that your code would be unsafe if freq_array spans a 64k boundary; add si, ax could wrap without doing carry-out into the high bits of ESI. – Peter Cordes. sewing room ideas photosWebOct 24, 2010 · inc word ptr ds:[0] add word ptr [bx],2. 下面的指令中,用 byte ptr 指明了指令访问的内存单元是一个字单元: mov byte ptr ds:[0],1. inc byte ptr [bx] inc byte ptr ds:[0] … the tulpehocken house