代码如下: 1assumecs:code,ds:data2data segment3strdb80dup(?)4data ends56code segment7start:8movax, data9movds, ax10movsi,01112s1:13movah,114int21h15mov[si], al16cmpal,'#'17jenext18incsi19jmps120next:21movcx, si22movsi,023s2:movah,224movdl, [si]25int21h26incsi27loop s22829mo...
This chapter focuses on the assembly language. A microprocessor can only act upon instructions that are specified in its instruction set. The instruction set consists of a series of hexadecimal codes, or opcodes, which are recognizable to the instruction decoder within the central processing unit (...
We introduce simple arithmetic instructions and show how these operations are written in assembly language. We then define the RISC-V instruction operands: registers, memory, and constants. This chapter assumes that you already have some familiarity with a high-level programming language such as C,...
Good computer application ability, to master computer theories,assembly language, C language. 良好的计算机应用能力, 掌握微机原理, 汇编语言, C语言等. 期刊摘选 We would all be programming inassembly languageor even machine language. 我们就要用汇编语言,甚至要用机器语言去编写程序. ...
Assembly language is as close to writing machine code as you can get without writing in pure hexadecimal. Since it is such a low-level language, it’s not practical in all cases, but should definitely be considered when you’re looking to maximize performance. With Assembly Language Succinctly...
:"=a" (out_var1),"=b" (out_var2),"=c" (out_var3) :"a" (op) ); 可见,我们可以为每个output operand指定其约束。 4)input operands 该字段为可选项,用以指明输入操作数,其典型格式为: : "constraints" (in_var) 其中,constraints可以是gcc支持的各种约束方式,in_var通常为C语言提供的输入变量...
OK, let's say we want to create a program that does something-or-other; perhaps it's a game of Breakout. We could create this program in assembly language or C. In the past, expert programmers would say that they knew lots of cunning tricks, so they could create smaller, faster progr...
All of the code in the previous section was written in assembly language. Sometimes it makes sense to improve the performance of a C function using bits of assembly language rather than a wholesale replacement of a C function with an assembly function. This section examines how to do exactly ...
This application note describes how to inline PTX assembly language statements into CUDA code. 1.1. Assembler (ASM) Statements Assembler statements, asm(), provide a way to insert arbitrary PTX code into your CUDA program. A simple example is: asm("membar.gl;"); This inserts a PTX ...
This book describes the assembler that runs on the SPARC architecture and translates source files that are in assembly language format into object files in linking format. The text in this book is current to Solaris 7 software.