Pseudo instruction in arm assembly

Pseudo instruction ：

  There are four main types of pseudo instructions ： Symbols define pseudo instructions , Data definition directives , Assembly control pseudo instructions , Other commonly used pseudo instructions

     

Symbols define pseudo instructions ：

Used to define global variables ：GBLA、GBLL、GBLS

Used to define local variables ：LCLA、LCLL、LCLS

Used to assign values to variables ：SETA、SETL、SETS

Bit general register list defines the name of RLIST

GBLA： Used to define a global numeric variable , And initialize it to 0

GBLL： Logical variables used to define the global , And initialize it to false

GBLS： A string variable used to define the global , And initialize it to null .

LCLA： Used to define a global numeric variable , And initialize it to 0

LCLL： Logical variables used to define the global , And initialize it to false

LCLS： A string variable used to define the global , And initialize it to null .

SETA： Used to assign a value to a numeric variable

SETL： Used to assign a value to a logical variable

SETS： Used to assign values to string variables .

Data definition directives ：

DCB: Used to allocate a contiguous byte storage unit and initialize it with the specified data

DCW(DCWU): It is used to allocate a continuous half byte storage unit and initialize it with the specified data .

DCD(DCDU): Used to allocate a contiguous byte storage unit and initialize it with the specified data .

DCFD(DCFDU): Used to allocate a contiguous byte storage unit for double precision floating-point numbers and initialize with the specified data .

DCFS(DCFSU): Used to allocate a contiguous byte storage unit for a single precision floating-point number and initialize it with the specified data .

DCQ(DCQU): Used to allocate a piece to 8 A contiguous byte storage unit in bytes and initialized with specified data .

SPACE： Used to allocate a contiguous piece of storage

MAP The first address of the memory table used to define a structure

FIFLD： The memory table data field used to define a structure

Assembly control pseudo instructions ：

IF,ELSE,ENDIF

WHILE,WEND

MACRO,MEND

NEXIT

Other commonly used pseudo instructions ：

AREA： Used to define a code segment or data field .

ROUT： Used to define the scope of a local variable .

EQU： For constants in programs , Labels, etc. define an equivalent character name similar to define

ARM Common instruction set shorthand