mirror of
https://github.com/libquantum/libquantum.git
synced 2025-10-03 08:42:01 +00:00
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
#include "defs.h"
|
|
#include "matrix.h"
|
|
#include "gates.h"
|
|
#include "oaddn.h"
|
|
#include "classic.h"
|
|
|
|
void emul(int a, int L, int width, quantum_reg *reg){
|
|
|
|
int i;
|
|
for(i=width-1;i>=0;i--) if ((a>>i) & 1) {
|
|
quantum_toffoli(2*width+2,L,width+i,reg);
|
|
}
|
|
}
|
|
|
|
void muln(int N, int a, int ctl, int width, quantum_reg *reg){//ctl tells, which bit is the external enable bit
|
|
int i;
|
|
int L = 2*width+1;
|
|
|
|
quantum_toffoli(ctl,2*width+2,L,reg);
|
|
|
|
emul(a%N, L, width, reg);
|
|
|
|
quantum_toffoli(ctl,2*width+2,L,reg);
|
|
|
|
for(i=1;i<width;i++){
|
|
quantum_toffoli(ctl,2*width+2+i,L,reg);
|
|
add_mod_n(N,((1<<i)*a)%N,width,reg);
|
|
quantum_toffoli(ctl,2*width+2+i,L,reg);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
void muln_inv(int N, int a, int ctl, int width, quantum_reg *reg){//ctl tells, which bit is the external enable bit
|
|
int i;
|
|
int L = 2*width+1;
|
|
|
|
a=quantum_inverse_mod(N,a);
|
|
|
|
for(i=width-1;i>0;i--){
|
|
quantum_toffoli(ctl,2*width+2+i,L,reg);
|
|
add_mod_n(N,N-((1<<i)*a)%N,width,reg);
|
|
quantum_toffoli(ctl,2*width+2+i,L,reg);
|
|
}
|
|
|
|
quantum_toffoli(ctl,2*width+2,L,reg);
|
|
emul(a%N, L, width, reg);
|
|
quantum_toffoli(ctl,2*width+2,L,reg);
|
|
}
|
|
|
|
|
|
void mul_mod_n(int N, int a, int ctl, int width, quantum_reg *reg)
|
|
{
|
|
muln(N,a,ctl,width,reg);
|
|
|
|
quantum_swaptheleads_omuln_controlled(ctl, width, reg);
|
|
|
|
muln_inv(N,a,ctl,width,reg);
|
|
|
|
}
|