在x86汇编的AT& T语法中,圆括号中的逗号是什么意思?
问题描述:
(寄存器1,寄存器2、4)
在AT& T汇编中是什么意思?
What does (register1, register2, 4)
mean in AT&T assembly?
例如:
cmp %eax, (%esi, %ebx, 4)
答
完整的AT& T基本/索引寄存器语法为:
The complete AT&T base/index register syntax is:
offset(base, index, multiplier)
您的偏移量
字段为 0
,因此您只有(基数,索引,乘数)
部分。在您的情况下,您正在将 eax
寄存器的内容与位于 esi +(ebx * 4)的32位值进行比较。 code>。
Your offset
field is 0
, so you just have the (base, index, multiplier)
part. In your case, you're comparing the contents of the eax
register to the 32-bit value located at esi + (ebx * 4)
.
在您可能更熟悉的Intel语法中,它的写法是:
In the Intel syntax you might be more familiar with, this would be written as:
cmp [ebx*4 + esi], eax