asm 错误消息:`(%rax,%edx,4)' 不是有效的基/索引表达式 [英] asm error message: `(%rax,%edx,4)' is not a valid base/index expression

问题描述

:96: 错误:`(%rax,%edx,4)' 不是有效的基/索引表达式

:96: Error: `(%rax,%edx,4)' is not a valid base/index expression

line97:错误:`-4(%rax,%edx,4)' 不是有效的基/索引表达式

line97: Error: `-4(%rax,%edx,4)' is not a valid base/index expression

line101:错误:`(%rax,%edx,4)' 不是有效的基/索引表达式

line101: Error: `(%rax,%edx,4)' is not a valid base/index expression

line102:错误:`-4(%rax,%edx,4)' 不是有效的基/索引表达式

line102: Error: `-4(%rax,%edx,4)' is not a valid base/index expression

我收到这些错误消息，但不知道如何解决.

I get these error messages and am not sure how to fix it.

这是我的代码:

__asm__ (

           "loop:       
	"
           "movl        $1,%3
	"
           "movl        $0, %6
"

           "start:        
	"

           "movl        (%1,%3,4),%4
	"       
           "movl        -4(%1, %3, 4), %5
	"

           "cmpl        %4, %5
	"           
           "jle         next
	"

           "xchgl        %4, %5
	"               
           "movl        %4, (%1, %3, 4)
	"        
           "movl        %5, -4(%1, %3, 4)
	"        
           "movl        $1, %6
	"

           "next:       
	"
           "incl        %3  
	"        

           "cmpl        %3, %2
	"
           "jge        start
	"        

           "cmpl        $0, %6
	"
           "je        end
	"

           "jmp        loop
	"        
           "end:        
	"

请帮助解释如何修复这些错误消息.我正在尝试在 ASM 中进行冒泡排序.

Some help explaining how to fix these error message, please. I am trying to make a bubble sort in ASM.

推荐答案

您没有说明您的目标处理器是什么，但它似乎是 x64.在 x64 上， (%rax, %edx, 4) 不是合法的组合.有关有效寻址模式的列表，请参阅处理器手册.我的猜测是你的意思是 (%rax, %rdx, 4).

You didn't say what processor you are targeting, but it appears to be x64. On x64, (%rax, %edx, 4) is not a legal combination. Consult the processor manual for a list of valid addressing modes. My guess is that you meant (%rax, %rdx, 4).

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