I had downloaded and compiled successfully  blackfin-toolchain-06r2-5.src.tar.gz on  Debian system.
but, when I use asm ( ) inline assemblely in C code file. there is a problem.

When I compile my .c file which including asm(); inline assembley without -O2 optimization option. The gcc report that:
main.c: In function `main':
main.c:15: error: invalid `asm': invalid expression as operand
main.c:15: error: invalid `asm': invalid expression as operand
main.c:15: error: invalid `asm': invalid expression as operand
main.c:15: error: invalid `asm': invalid expression as operand
main.c:15: error: invalid `asm': invalid expression as operand
main.c:15: error: invalid `asm': invalid expression as operand
main.c:15: error: invalid `asm': invalid expression as operand

but when with no -O2, everything is ok.

the .c file is just a test code to convert ycbcr to rgb. I attach it here:
/*----------------------main.c--------------------------*/
#include <stdio.h>

int main(int argc, char * argv[]){

        unsigned int y,u,v;
        unsigned int yy, uv;
        unsigned char rgb[3];
        unsigned int  param[3]={0x00800080,0x3395628f, 0x5b642c08};

        y=97; u=90; v=195;
        uv=(v<<16)|u;
        yy=(y<<16)|y;

        asm volatile (
        "R3=[%2++]; "
        "%0=%0-|-R3; "
        "R0=%0+|+%1 ||R3=[%2++];"
        "R1.H=R3.H*%0.H, R1.L=R3.L*%0.L;"
        "R0=R0+|+R1 || R3=[%2];"
        "R4=R0>>16;"
        "R2.H=R3.H*%0.H,R2.L=R3.L*%0.L ||b[%3++]=R0;"
        "%1.L=%1.L-R2.L(s)||b[%3++]=R0;"

        "%1.L=%1.L-R2.H(s)||b[%3--]=R4;"
        "b[%3]=%1;"
        :                                       // out put
        :"d"(uv),"d"(yy),"p"(param),"p"(rgb)    // input
        :"R0","R1","R2","R3","R4","A0","A1"
        );

        return 0;
}

/*----------------end of source code-----------------------*/

is it a bug of blackfin' gcc?