performing 1s and 2s complement,only first row is being done 2s complement,where i am wrong please tel

A=["48","03","0C","F6","00","F5","40","02","04","02","94","F4","D0","F5","2C","03","50","01","38","F4","24","F7","14","04","80","00","F4","F3","5C","F8","C4","04","28","FF","84","F3","08","F9","6C","04","EC","FD","CC","F2","2C","FA","E4","04","44","FC","C4","F2","1C","FC","6C","05","E4","FB","08","F3","40","FD","60","05","5C","FA","20","F3","70","FE","C8","04","A4","F8","04","F3","1C","FF","F0","03","84","F7","D4","F3","84","00","DC","03","2C","F7","00","F5","18","02","24","03","BC","F5","88","F5","08","03","78","02","20","F5","40","F6","34","03","D0","00","08","F4","5C","F7","0C","04","DC","FF","98","F3","7C","F8","C8","04","F8","FE","48","F3","F0","F9","34","05","70","FD","C8","F2","40","FB","40","05","24","FC","C0","F2","DC","FB","F4","04","18","FB","E4","F2","70","FD","D4","04","A8","F9","54","F3","F4","FE","FC","04","68","F8","50","F3","0C","00","34","04","50","F7","80","F3","BC","00","54","03","00","F6","8C","F4","48","02","60","03","CC","F5","A0","F5","14","03","D8","01","44","F4","28","F7","D0","03","70","00","44","F4","E0","F7","70","04","D4","FF","6C","F3","A8","F8","E8","04","9C","FE","3C","F3","38","FA","2C","05","FC","FC","EC","F2","38","FB","0C","05","20","FC","C4","F2","80","FC","24","05","40","FA","BC","F2","14","FE","1C","05","38","F9","10","F3"];

B=A';
C = reshape(A,2,[])';
D=join(C);   
E=regexprep(D,'[^\w'']','');  %remove spaces
F=hex2dec(E);   %hex2dec
G=dec2bin(F);

c=not(G-'0');   % one's complement
d=1;

c1=double(c);
c2=dec2hex(c1');
c3=reshape(c2,16,[])';
c4=string(c3);
d=1;
c5_vec=zeros(i,k);
for i=1:512
for k=16:-1:1
  r=d & c(i,k);
  c5(i,k)=xor(d,c(i,k));
  c5_vec=c5;
  d=r;
end
end

Here c5 is expected to save 2s complement of all the elements,but only first row is being 2s complemented.

Answer 1

[ag]

Hi Akshay,

The issue that you are facing is because the carry value "d" is not being reset after the completion of each row's calculation.

The below code snippet demonstrates the modification that should resolve the issue:

for i=1:512
    d = 1; % resetting carry value for each row
    for k=16:-1:1
      r=d & c(i,k);
      c5(i,k)=xor(d,c(i,k));
      c5_vec=c5;
      d=r;
    end
end

Hope this helps!