汇编语言伪指令 “ if ” 和 “ .if ” 有什么区别

Syntax: .IF condition
ifstatements
[.ELSEIF] condition
elseifstatements
.
.
.
[.ELSE]
elsestatements
.ENDIF

For "condition" see Comparison run-time operators

Description:

Used for clear coding of common control-flow blocks. Generates
comparison and conditional jump instructions so that if

<condition> is true, the processor executes the instructions
following .IF until the next .ELSEIF, .ELSE, or .ENDIF. .IF
statements can be nested.

The .ELSEIF statement is used to create a code block that is
executed if the preceding .IF and .ELSEIF conditions are false,
and the current .ELSEIF condition is true. There can be several
.ELSEIF blocks within a .IF block. The .ELSEIF statement performs
the same function as a .IF inside a .ELSE but does not create

another nesting level of .IFs.

.ELSE specifies