Quick C struct question

[dishawbr]

typedef struct RRR

{

signal3 opcode:3;

signal3 rega:3;

signal3 regb:3;

signal2 zeros:2;

signal2 mores:2;

signal3 regc:3;

}RRR;



typedef struct RRI

{

signal3 opcode:3;

signal3 rega:3;

signal3 regb:3;

signal7 immediate:7;

}RRI;



typedef struct RI

{

signal3 opcode:3;

signal3 rega:3;

signal3 immediate:3;

signal7 immediate2:7;

}RI;



union all

{

struct RRR;

struct RRI;

struct RI;

signal16 IR;

};





union all var_name;

var_name.IR = IR;



then later

control(var_name.RRR.opcode);



it tells me that there is no member RRR in the union.. what am I doing wrong?

 

[alisajid]

Shouldn't it be:

union all

{

struct RRR foo;

struct RRI bar;

struct RI foobar;

signal16 IR;

};


then:

union all var_name;
function_call(var_name.foo.opcode );

 

[dishawbr]

thanks.. I will try that