use crate::core_crypto::gpu::CudaStreams;
use crate::core_crypto::prelude::LweBskGroupingFactor;
use crate::integer::gpu::ciphertext::boolean_value::CudaBooleanBlock;
use crate::integer::gpu::ciphertext::CudaIntegerRadixCiphertext;
use crate::integer::gpu::server_key::{CudaBootstrappingKey, CudaDynamicKeyswitchingKey};
use crate::integer::gpu::{
cuda_backend_get_cmux_size_on_gpu, cuda_backend_get_full_propagate_assign_size_on_gpu,
cuda_backend_unchecked_cmux, CudaServerKey, PBSType,
};
impl CudaServerKey {
pub fn unchecked_if_then_else<T: CudaIntegerRadixCiphertext>(
&self,
condition: &CudaBooleanBlock,
true_ct: &T,
false_ct: &T,
stream: &CudaStreams,
) -> T {
let lwe_ciphertext_count = true_ct.as_ref().d_blocks.lwe_ciphertext_count();
let mut result: T = self
.create_trivial_zero_radix(true_ct.as_ref().d_blocks.lwe_ciphertext_count().0, stream);
let CudaDynamicKeyswitchingKey::Standard(computing_ks_key) = &self.key_switching_key else {
panic!("Only the standard atomic pattern is supported on GPU")
};
unsafe {
match &self.bootstrapping_key {
CudaBootstrappingKey::Classic(d_bsk) => {
cuda_backend_unchecked_cmux(
stream,
result.as_mut(),
condition,
true_ct.as_ref(),
false_ct.as_ref(),
&d_bsk.d_vec,
&computing_ks_key.d_vec,
self.message_modulus,
self.carry_modulus,
d_bsk.glwe_dimension,
d_bsk.polynomial_size,
computing_ks_key.input_key_lwe_size().to_lwe_dimension(),
computing_ks_key.output_key_lwe_size().to_lwe_dimension(),
computing_ks_key.decomposition_level_count(),
computing_ks_key.decomposition_base_log(),
d_bsk.decomp_level_count,
d_bsk.decomp_base_log,
lwe_ciphertext_count.0 as u32,
PBSType::Classical,
LweBskGroupingFactor(0),
d_bsk.ms_noise_reduction_configuration.as_ref(),
);
}
CudaBootstrappingKey::MultiBit(d_multibit_bsk) => {
cuda_backend_unchecked_cmux(
stream,
result.as_mut(),
condition,
true_ct.as_ref(),
false_ct.as_ref(),
&d_multibit_bsk.d_vec,
&computing_ks_key.d_vec,
self.message_modulus,
self.carry_modulus,
d_multibit_bsk.glwe_dimension,
d_multibit_bsk.polynomial_size,
computing_ks_key.input_key_lwe_size().to_lwe_dimension(),
computing_ks_key.output_key_lwe_size().to_lwe_dimension(),
computing_ks_key.decomposition_level_count(),
computing_ks_key.decomposition_base_log(),
d_multibit_bsk.decomp_level_count,
d_multibit_bsk.decomp_base_log,
lwe_ciphertext_count.0 as u32,
PBSType::MultiBit,
d_multibit_bsk.grouping_factor,
None,
);
}
}
}
result
}
pub fn if_then_else<T: CudaIntegerRadixCiphertext>(
&self,
condition: &CudaBooleanBlock,
true_ct: &T,
false_ct: &T,
stream: &CudaStreams,
) -> T {
let mut tmp_true_ct;
let mut tmp_false_ct;
let true_ct = if true_ct.block_carries_are_empty() {
true_ct
} else {
tmp_true_ct = true_ct.duplicate(stream);
self.full_propagate_assign(&mut tmp_true_ct, stream);
&tmp_true_ct
};
let false_ct = if false_ct.block_carries_are_empty() {
false_ct
} else {
tmp_false_ct = false_ct.duplicate(stream);
self.full_propagate_assign(&mut tmp_false_ct, stream);
&tmp_false_ct
};
self.unchecked_if_then_else(condition, true_ct, false_ct, stream)
}
pub fn get_if_then_else_size_on_gpu<T: CudaIntegerRadixCiphertext>(
&self,
_condition: &CudaBooleanBlock,
true_ct: &T,
false_ct: &T,
streams: &CudaStreams,
) -> u64 {
assert_eq!(
true_ct.as_ref().d_blocks.lwe_dimension(),
false_ct.as_ref().d_blocks.lwe_dimension()
);
assert_eq!(
true_ct.as_ref().d_blocks.lwe_ciphertext_count(),
false_ct.as_ref().d_blocks.lwe_ciphertext_count()
);
let CudaDynamicKeyswitchingKey::Standard(computing_ks_key) = &self.key_switching_key else {
panic!("Only the standard atomic pattern is supported on GPU")
};
let full_prop_mem = match &self.bootstrapping_key {
CudaBootstrappingKey::Classic(d_bsk) => {
cuda_backend_get_full_propagate_assign_size_on_gpu(
streams,
d_bsk.input_lwe_dimension(),
d_bsk.glwe_dimension(),
d_bsk.polynomial_size(),
computing_ks_key.decomposition_level_count(),
computing_ks_key.decomposition_base_log(),
d_bsk.decomp_level_count(),
d_bsk.decomp_base_log(),
self.message_modulus,
self.carry_modulus,
PBSType::Classical,
LweBskGroupingFactor(0),
d_bsk.ms_noise_reduction_configuration.as_ref(),
)
}
CudaBootstrappingKey::MultiBit(d_multibit_bsk) => {
cuda_backend_get_full_propagate_assign_size_on_gpu(
streams,
d_multibit_bsk.input_lwe_dimension(),
d_multibit_bsk.glwe_dimension(),
d_multibit_bsk.polynomial_size(),
computing_ks_key.decomposition_level_count(),
computing_ks_key.decomposition_base_log(),
d_multibit_bsk.decomp_level_count(),
d_multibit_bsk.decomp_base_log(),
self.message_modulus,
self.carry_modulus,
PBSType::MultiBit,
d_multibit_bsk.grouping_factor,
None,
)
}
};
let actual_full_prop_mem = match (
true_ct.block_carries_are_empty(),
false_ct.block_carries_are_empty(),
) {
(true, true) => 0,
(true, false) => self.get_ciphertext_size_on_gpu(true_ct) + full_prop_mem,
(false, true) => full_prop_mem,
(false, false) => self.get_ciphertext_size_on_gpu(false_ct) + full_prop_mem,
};
let lwe_ciphertext_count = true_ct.as_ref().d_blocks.lwe_ciphertext_count();
let cmux_mem = match &self.bootstrapping_key {
CudaBootstrappingKey::Classic(d_bsk) => cuda_backend_get_cmux_size_on_gpu(
streams,
self.message_modulus,
self.carry_modulus,
d_bsk.glwe_dimension,
d_bsk.polynomial_size,
computing_ks_key.input_key_lwe_size().to_lwe_dimension(),
computing_ks_key.output_key_lwe_size().to_lwe_dimension(),
computing_ks_key.decomposition_level_count(),
computing_ks_key.decomposition_base_log(),
d_bsk.decomp_level_count,
d_bsk.decomp_base_log,
lwe_ciphertext_count.0 as u32,
PBSType::Classical,
LweBskGroupingFactor(0),
d_bsk.ms_noise_reduction_configuration.as_ref(),
),
CudaBootstrappingKey::MultiBit(d_multibit_bsk) => cuda_backend_get_cmux_size_on_gpu(
streams,
self.message_modulus,
self.carry_modulus,
d_multibit_bsk.glwe_dimension,
d_multibit_bsk.polynomial_size,
computing_ks_key.input_key_lwe_size().to_lwe_dimension(),
computing_ks_key.output_key_lwe_size().to_lwe_dimension(),
computing_ks_key.decomposition_level_count(),
computing_ks_key.decomposition_base_log(),
d_multibit_bsk.decomp_level_count,
d_multibit_bsk.decomp_base_log,
lwe_ciphertext_count.0 as u32,
PBSType::MultiBit,
d_multibit_bsk.grouping_factor,
None,
),
};
actual_full_prop_mem.max(cmux_mem)
}
}