inline asm with sse problem

[wojtekb82_23 <wojtekb82_23@xxxxx>]

Hi,

I have the code [appendix 1] that I compile using [appendix 2] on system [appendix 3].

I get a Segmentation fault at line:
0x080487ca <main+138>: movups (%esi),%xmm0
0x080487cd <main+141>: addps  (%ebx),%xmm0 <- THIS ONE
0x080487d0 <main+144>: movups %xmm0,(%ebx) 

What am I doing wrong?

Thanks in advance for any replies.

Kind regards,
WB.

BTW: if I compile the code with -O0 i get strange results in the generated executable:
0x08048896 <main+288>: mov    0xffffffe8(%ebp),%eax
0x08048899 <main+291>: movups (%eax),%xmm0
0x0804889c <main+294>: addps  (%eax),%xmm0
0x0804889f <main+297>: movups %xmm0,(%eax)
0x080488a2 <main+300>: mov    %eax,0xffffffe4(%ebp)

291 and 294 is (%eax) ???


-----------------------------------------------------------------
Appendix [1] :

#include <iostream>

using namespace std;

int main() {
	float* dst = new float[4];
	float* src = new float[4];
	
	for(int i = 0; i<4; i++)
	{
		dst[i] = 0;
		src[i] = 1;
	}
	
	cout << dst[0] << " " << dst[1] << " " << dst[2] << " " << dst[3] << endl;
	 
	asm ("movups 0(%[src]), %%xmm0\n\t"
		 "addps  0(%[dst]), %%xmm0\n\t"
	     "movups %%xmm0, 0(%[dst])\n\t"
	     : [dst] "=r" (dst)
	     : [src] "r" (src)
	     : "xmm0");


    	cout << dst[0] << " " << dst[1] << " " << dst[2] << " " << dst[3] << endl;
    
	return 0;
}

-----------------------------------------------------------------
Appendix [2] :

Building file: ../src/main.cpp
Invoking: GCC C++ Compiler
g++ -O3 -msse -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"src/main.d" -MT"src/main.d" -o"src/main.o" "../src/main.cpp"
Finished building: ../src/main.cpp
 
Building target: testy
Invoking: GCC C++ Linker
g++  -o"testy"  ./src/main.o   
Finished building target: testy

-----------------------------------------------------------------
Appendix [3] :

wojtek@zbUbuntu:~/workspace/testy/Debug$ uname -a
Linux zbUbuntu 2.6.20-16-generic #2 SMP Fri Feb 1 02:59:08 UTC 2008 i686 GNU/Linux
wojtek@zbUbuntu:~/workspace/testy/Debug$ gcc --version
gcc (GCC) 4.1.2 (Ubuntu 4.1.2-0ubuntu4)