1use core::{
  2    AutomorphismKey, AutomorphismKeyExec, GLWECiphertext, GLWESecret, GLWESecretExec, GLWESwitchingKey, GLWESwitchingKeyExec,
  3    Infos,
  4};
  5use std::{hint::black_box, time::Duration};
  6
  7use backend::{
  8    hal::{
  9        api::{ModuleNew, ScratchOwnedAlloc, ScratchOwnedBorrow},
 10        layouts::{Module, ScratchOwned},
 11    },
 12    implementation::cpu_spqlios::FFT64,
 13};
 14use criterion::{BenchmarkId, Criterion, criterion_group, criterion_main};
 15use sampling::source::Source;
 16
 17fn bench_keyswitch_glwe_fft64(c: &mut Criterion) {
 18    let mut group = c.benchmark_group("keyswitch_glwe_fft64");
 19
 20    struct Params {
 21        log_n: usize,
 22        basek: usize,
 23        k_ct_in: usize,
 24        k_ct_out: usize,
 25        k_ksk: usize,
 26        digits: usize,
 27        rank_in: usize,
 28        rank_out: usize,
 29    }
 30
 31    fn runner(p: Params) -> impl FnMut() {
 32        let module: Module<FFT64> = Module::<FFT64>::new(1 << p.log_n);
 33
 34        let n = module.n();
 35        let basek: usize = p.basek;
 36        let k_rlwe_in: usize = p.k_ct_in;
 37        let k_rlwe_out: usize = p.k_ct_out;
 38        let k_grlwe: usize = p.k_ksk;
 39        let rank_in: usize = p.rank_in;
 40        let rank_out: usize = p.rank_out;
 41        let digits: usize = p.digits;
 42
 43        let rows: usize = p.k_ct_in.div_ceil(p.basek * digits);
 44        let sigma: f64 = 3.2;
 45
 46        let mut ksk: AutomorphismKey<Vec<u8>> = AutomorphismKey::alloc(n, basek, k_grlwe, rows, digits, rank_out);
 47        let mut ct_in: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_rlwe_in, rank_in);
 48        let mut ct_out: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_rlwe_out, rank_out);
 49
 50        let mut scratch: ScratchOwned<FFT64> = ScratchOwned::alloc(
 51            GLWESwitchingKey::encrypt_sk_scratch_space(&module, n, basek, ksk.k(), rank_in, rank_out)
 52                | GLWECiphertext::encrypt_sk_scratch_space(&module, n, basek, ct_in.k())
 53                | GLWECiphertext::keyswitch_scratch_space(
 54                    &module,
 55                    n,
 56                    basek,
 57                    ct_out.k(),
 58                    ct_in.k(),
 59                    ksk.k(),
 60                    digits,
 61                    rank_in,
 62                    rank_out,
 63                ),
 64        );
 65
 66        let mut source_xs = Source::new([0u8; 32]);
 67        let mut source_xe = Source::new([0u8; 32]);
 68        let mut source_xa = Source::new([0u8; 32]);
 69
 70        let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_in);
 71        sk_in.fill_ternary_prob(0.5, &mut source_xs);
 72        let sk_in_dft: GLWESecretExec<Vec<u8>, FFT64> = GLWESecretExec::from(&module, &sk_in);
 73
 74        let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank_out);
 75        sk_out.fill_ternary_prob(0.5, &mut source_xs);
 76
 77        ksk.encrypt_sk(
 78            &module,
 79            -1,
 80            &sk_in,
 81            &mut source_xa,
 82            &mut source_xe,
 83            sigma,
 84            scratch.borrow(),
 85        );
 86
 87        ct_in.encrypt_zero_sk(
 88            &module,
 89            &sk_in_dft,
 90            &mut source_xa,
 91            &mut source_xe,
 92            sigma,
 93            scratch.borrow(),
 94        );
 95
 96        let ksk_exec: AutomorphismKeyExec<Vec<u8>, _> = AutomorphismKeyExec::from(&module, &ksk, scratch.borrow());
 97
 98        move || {
 99            black_box(ct_out.automorphism(&module, &ct_in, &ksk_exec, scratch.borrow()));
100        }
101    }
102
103    let digits: usize = 1;
104    let basek: usize = 19;
105
106    let params_set: Vec<Params> = vec![Params {
107        log_n: 15,
108        basek: basek,
109        k_ct_in: 874 - digits * basek,
110        k_ct_out: 874 - digits * basek,
111        k_ksk: 874,
112        digits: digits,
113        rank_in: 1,
114        rank_out: 1,
115    }];
116
117    for params in params_set {
118        let id = BenchmarkId::new("KEYSWITCH_GLWE_FFT64", "");
119        let mut runner = runner(params);
120        group.sample_size(500);
121        group.measurement_time(Duration::from_secs(40));
122        group.bench_with_input(id, &(), |b, _| b.iter(&mut runner));
123    }
124
125    group.finish();
126}
127
128fn bench_keyswitch_glwe_inplace_fft64(c: &mut Criterion) {
129    let mut group = c.benchmark_group("keyswitch_glwe_inplace_fft64");
130
131    struct Params {
132        log_n: usize,
133        basek: usize,
134        k_ct: usize,
135        k_ksk: usize,
136        rank: usize,
137    }
138
139    fn runner(p: Params) -> impl FnMut() {
140        let module: Module<FFT64> = Module::<FFT64>::new(1 << p.log_n);
141
142        let n = module.n();
143        let basek: usize = p.basek;
144        let k_ct: usize = p.k_ct;
145        let k_ksk: usize = p.k_ksk;
146        let rank: usize = p.rank;
147        let digits: usize = 1;
148
149        let rows: usize = p.k_ct.div_ceil(p.basek);
150        let sigma: f64 = 3.2;
151
152        let mut ksk: GLWESwitchingKey<Vec<u8>> = GLWESwitchingKey::alloc(n, basek, k_ksk, rows, digits, rank, rank);
153        let mut ct: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(n, basek, k_ct, rank);
154
155        let mut scratch: ScratchOwned<FFT64> = ScratchOwned::alloc(
156            GLWESwitchingKey::encrypt_sk_scratch_space(&module, n, basek, ksk.k(), rank, rank)
157                | GLWECiphertext::encrypt_sk_scratch_space(&module, n, basek, ct.k())
158                | GLWECiphertext::keyswitch_inplace_scratch_space(&module, n, basek, ct.k(), ksk.k(), digits, rank),
159        );
160
161        let mut source_xs: Source = Source::new([0u8; 32]);
162        let mut source_xe: Source = Source::new([0u8; 32]);
163        let mut source_xa: Source = Source::new([0u8; 32]);
164
165        let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
166        sk_in.fill_ternary_prob(0.5, &mut source_xs);
167        let sk_in_dft: GLWESecretExec<Vec<u8>, FFT64> = GLWESecretExec::from(&module, &sk_in);
168
169        let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(n, rank);
170        sk_out.fill_ternary_prob(0.5, &mut source_xs);
171
172        ksk.encrypt_sk(
173            &module,
174            &sk_in,
175            &sk_out,
176            &mut source_xa,
177            &mut source_xe,
178            sigma,
179            scratch.borrow(),
180        );
181
182        ct.encrypt_zero_sk(
183            &module,
184            &sk_in_dft,
185            &mut source_xa,
186            &mut source_xe,
187            sigma,
188            scratch.borrow(),
189        );
190
191        let ksk_exec: GLWESwitchingKeyExec<Vec<u8>, FFT64> = GLWESwitchingKeyExec::from(&module, &ksk, scratch.borrow());
192
193        move || {
194            black_box(ct.keyswitch_inplace(&module, &ksk_exec, scratch.borrow()));
195        }
196    }
197
198    let params_set: Vec<Params> = vec![Params {
199        log_n: 9,
200        basek: 18,
201        k_ct: 27,
202        k_ksk: 27,
203        rank: 1,
204    }];
205
206    for params in params_set {
207        let id = BenchmarkId::new("KEYSWITCH_GLWE_INPLACE_FFT64", "");
208        let mut runner = runner(params);
209        group.bench_with_input(id, &(), |b, _| b.iter(&mut runner));
210    }
211
212    group.finish();
213}
214
215criterion_group!(
216    benches,
217    bench_keyswitch_glwe_fft64,
218    bench_keyswitch_glwe_inplace_fft64
219);
220criterion_main!(benches);