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Fix toml for icicle tag, rustfmt
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@bigsky77
bigsky77 committed Dec 14, 2023
1 parent 39e7935 commit eadf5e3
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Showing 10 changed files with 195 additions and 108 deletions.
2 changes: 1 addition & 1 deletion halo2_proofs/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -63,7 +63,7 @@ lazy_static = { version = "1", optional = true }
env_logger = "0.10.0"

# GPU Icicle integration
icicle = { git = "https://github.com/ingonyama-zk/icicle.git", optional = true }
icicle = { git = "https://github.com/ingonyama-zk/icicle.git", tag = "v0.1.0", optional = true }
rustacuda = { version = "0.1", optional = true }

# Developer tooling dependencies
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21 changes: 16 additions & 5 deletions halo2_proofs/src/arithmetic.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -146,18 +146,29 @@ pub fn small_multiexp<C: CurveAffine>(coeffs: &[C::Scalar], bases: &[C]) -> C::C
#[cfg(feature = "icicle_gpu")]
/// Performs a multi-exponentiation operation on GPU using Icicle library
pub fn best_multiexp_gpu<C: CurveAffine>(coeffs: &[C::Scalar], is_lagrange: bool) -> C::Curve {
let scalars_ptr: DeviceBuffer<::icicle::curves::bn254::ScalarField_BN254> = icicle::copy_scalars_to_device::<C>(coeffs);
let scalars_ptr: DeviceBuffer<::icicle::curves::bn254::ScalarField_BN254> =
icicle::copy_scalars_to_device::<C>(coeffs);

icicle::multiexp_on_device::<C>(scalars_ptr, is_lagrange)
}

#[cfg(feature = "icicle_gpu")]
/// Performs a batch multi-exponentiation operation on GPU using Icicle library
pub fn best_batch_multiexp_gpu<C: CurveAffine>(coeffs: &[C::Scalar], bases: &[C], batch_size: usize) -> Vec<C::Curve> {
let scalars_ptr: DeviceBuffer<::icicle::curves::bn254::ScalarField_BN254> = icicle::copy_scalars_to_device::<C>(coeffs);
let all_bases = vec![bases; batch_size].iter().flat_map(|bases| bases.iter()).copied().collect::<Vec<_>>();
pub fn best_batch_multiexp_gpu<C: CurveAffine>(
coeffs: &[C::Scalar],
bases: &[C],
batch_size: usize,
) -> Vec<C::Curve> {
let scalars_ptr: DeviceBuffer<::icicle::curves::bn254::ScalarField_BN254> =
icicle::copy_scalars_to_device::<C>(coeffs);
let all_bases = vec![bases; batch_size]
.iter()
.flat_map(|bases| bases.iter())
.copied()
.collect::<Vec<_>>();
assert!(scalars_ptr.len() == all_bases.len());
let bases_ptr: DeviceBuffer<::icicle::curves::bn254::PointAffineNoInfinity_BN254> = icicle::copy_points_to_device::<C>(all_bases.as_slice());
let bases_ptr: DeviceBuffer<::icicle::curves::bn254::PointAffineNoInfinity_BN254> =
icicle::copy_points_to_device::<C>(all_bases.as_slice());

icicle::batch_multiexp_on_device::<C>(scalars_ptr, bases_ptr, batch_size)
}
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132 changes: 84 additions & 48 deletions halo2_proofs/src/icicle.rs
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Original file line number Diff line number Diff line change
@@ -1,22 +1,30 @@
use group::ff::PrimeField;
use icicle::{curves::bn254::{Point_BN254, ScalarField_BN254}, test_bn254::{commit_bn254, commit_batch_bn254}};
use icicle::{
curves::bn254::{Point_BN254, ScalarField_BN254},
test_bn254::{commit_batch_bn254, commit_bn254},
};
use std::sync::{Arc, Once};

pub use icicle::curves::bn254::PointAffineNoInfinity_BN254;
use rustacuda::memory::CopyDestination;
use rustacuda::prelude::*;

pub use halo2curves::CurveAffine;
use std::{mem, env};
use log::info;
use std::{env, mem};

static mut GPU_CONTEXT: Option<Context> = None;
static mut GPU_G: Option<DeviceBuffer<PointAffineNoInfinity_BN254>> = None;
static mut GPU_G_LAGRANGE: Option<DeviceBuffer<PointAffineNoInfinity_BN254>> = None;
static GPU_INIT: Once = Once::new();

pub fn is_small_circuit(size: usize) -> bool {
size <= (1 << u8::from_str_radix(&env::var("ICICLE_SMALL_CIRCUIT").unwrap_or("8".to_string()), 10).unwrap())
size <= (1
<< u8::from_str_radix(
&env::var("ICICLE_SMALL_CIRCUIT").unwrap_or("8".to_string()),
10,
)
.unwrap())
}

pub fn init_gpu<C: CurveAffine>(g: &[C], g_lagrange: &[C]) {
Expand All @@ -30,16 +38,22 @@ pub fn init_gpu<C: CurveAffine>(g: &[C], g_lagrange: &[C]) {
}
}

fn u32_from_u8(u8_arr: &[u8;32]) -> [u32;8]{
let mut t = [0u32;8];
for i in 0..8{
t[i] = u32::from_le_bytes([u8_arr[4*i],u8_arr[4*i+1],u8_arr[4*i+2],u8_arr[4*i+3]]);
fn u32_from_u8(u8_arr: &[u8; 32]) -> [u32; 8] {
let mut t = [0u32; 8];
for i in 0..8 {
t[i] = u32::from_le_bytes([
u8_arr[4 * i],
u8_arr[4 * i + 1],
u8_arr[4 * i + 2],
u8_arr[4 * i + 3],
]);
}
return t;
return t;
}

fn repr_from_u32<C: CurveAffine>(u32_arr: &[u32;8]) -> <C as CurveAffine>::Base {
let t : &[<<C as CurveAffine>::Base as PrimeField>::Repr] = unsafe { mem::transmute(&u32_arr[..]) };
fn repr_from_u32<C: CurveAffine>(u32_arr: &[u32; 8]) -> <C as CurveAffine>::Base {
let t: &[<<C as CurveAffine>::Base as PrimeField>::Repr] =
unsafe { mem::transmute(&u32_arr[..]) };
return PrimeField::from_repr(t[0]).unwrap();
}

Expand All @@ -52,54 +66,74 @@ fn icicle_scalars_from_c<C: CurveAffine>(coeffs: &[C::Scalar]) -> Vec<ScalarFiel
let _coeffs = [Arc::new(
coeffs.iter().map(|x| x.to_repr()).collect::<Vec<_>>(),
)];

let _coeffs: &Arc<Vec<[u32;8]>> = unsafe { mem::transmute(&_coeffs) };
_coeffs.iter().map(|x| {
ScalarField_BN254::from_limbs(x)
}).collect::<Vec<_>>()

let _coeffs: &Arc<Vec<[u32; 8]>> = unsafe { mem::transmute(&_coeffs) };
_coeffs
.iter()
.map(|x| ScalarField_BN254::from_limbs(x))
.collect::<Vec<_>>()
}

pub fn copy_scalars_to_device<C: CurveAffine>(coeffs: &[C::Scalar]) -> DeviceBuffer<ScalarField_BN254> {
pub fn copy_scalars_to_device<C: CurveAffine>(
coeffs: &[C::Scalar],
) -> DeviceBuffer<ScalarField_BN254> {
let scalars = icicle_scalars_from_c::<C>(coeffs);

DeviceBuffer::from_slice(scalars.as_slice()).unwrap()
}

fn icicle_points_from_c<C: CurveAffine>(bases: &[C]) -> Vec<PointAffineNoInfinity_BN254> {
let _bases = [Arc::new(
bases.iter().map(|p| {
let coordinates = p.coordinates().unwrap();
[coordinates.x().to_repr(),coordinates.y().to_repr()]
}).collect::<Vec<_>>(),
bases
.iter()
.map(|p| {
let coordinates = p.coordinates().unwrap();
[coordinates.x().to_repr(), coordinates.y().to_repr()]
})
.collect::<Vec<_>>(),
)];

let _bases: &Arc<Vec<[[u8;32];2]>> = unsafe { mem::transmute(&_bases) };
_bases.iter().map(|x| {
let tx = u32_from_u8(&x[0]);
let ty = u32_from_u8(&x[1]);
PointAffineNoInfinity_BN254::from_limbs(&tx,&ty)
}).collect::<Vec<_>>()

let _bases: &Arc<Vec<[[u8; 32]; 2]>> = unsafe { mem::transmute(&_bases) };
_bases
.iter()
.map(|x| {
let tx = u32_from_u8(&x[0]);
let ty = u32_from_u8(&x[1]);
PointAffineNoInfinity_BN254::from_limbs(&tx, &ty)
})
.collect::<Vec<_>>()
}

pub fn copy_points_to_device<C: CurveAffine>(bases: &[C]) -> DeviceBuffer<PointAffineNoInfinity_BN254> {
pub fn copy_points_to_device<C: CurveAffine>(
bases: &[C],
) -> DeviceBuffer<PointAffineNoInfinity_BN254> {
let points = icicle_points_from_c(bases);

DeviceBuffer::from_slice(points.as_slice()).unwrap()
}

fn c_from_icicle_point<C: CurveAffine>(commit_res: Point_BN254) -> C::Curve {
let (x , y) = if is_infinity_point(commit_res){
(repr_from_u32::<C>(&[0u32;8]), repr_from_u32::<C>(&[0u32;8]))
} else{
fn c_from_icicle_point<C: CurveAffine>(commit_res: Point_BN254) -> C::Curve {
let (x, y) = if is_infinity_point(commit_res) {
(
repr_from_u32::<C>(&[0u32; 8]),
repr_from_u32::<C>(&[0u32; 8]),
)
} else {
let affine_res_from_cuda = commit_res.to_affine();
(repr_from_u32::<C>(&affine_res_from_cuda.x.s), repr_from_u32::<C>(&affine_res_from_cuda.y.s))
(
repr_from_u32::<C>(&affine_res_from_cuda.x.s),
repr_from_u32::<C>(&affine_res_from_cuda.y.s),
)
};

let affine = C::from_xy(x,y).unwrap();
let affine = C::from_xy(x, y).unwrap();
return affine.to_curve();
}

pub fn multiexp_on_device<C: CurveAffine>(mut coeffs: DeviceBuffer<ScalarField_BN254>, is_lagrange: bool) -> C::Curve {
pub fn multiexp_on_device<C: CurveAffine>(
mut coeffs: DeviceBuffer<ScalarField_BN254>,
is_lagrange: bool,
) -> C::Curve {
let base_ptr: &mut DeviceBuffer<PointAffineNoInfinity_BN254>;
unsafe {
if is_lagrange {
Expand All @@ -112,21 +146,23 @@ pub fn multiexp_on_device<C: CurveAffine>(mut coeffs: DeviceBuffer<ScalarField_B
let d_commit_result = commit_bn254(base_ptr, &mut coeffs, 10);

let mut h_commit_result = Point_BN254::zero();
d_commit_result
.copy_to(&mut h_commit_result)
.unwrap();
d_commit_result.copy_to(&mut h_commit_result).unwrap();

c_from_icicle_point::<C>(h_commit_result)
}

pub fn batch_multiexp_on_device<C: CurveAffine>(mut coeffs: DeviceBuffer<ScalarField_BN254>, mut bases: DeviceBuffer<PointAffineNoInfinity_BN254>, batch_size: usize) -> Vec<C::Curve> {
pub fn batch_multiexp_on_device<C: CurveAffine>(
mut coeffs: DeviceBuffer<ScalarField_BN254>,
mut bases: DeviceBuffer<PointAffineNoInfinity_BN254>,
batch_size: usize,
) -> Vec<C::Curve> {
let d_commit_result = commit_batch_bn254(&mut bases, &mut coeffs, batch_size);
let mut h_commit_result: Vec<Point_BN254> = (0..batch_size)
.map(|_| Point_BN254::zero())
.collect();
d_commit_result
.copy_to(&mut h_commit_result[..])
.unwrap();

h_commit_result.iter().map(|commit_result| c_from_icicle_point::<C>(*commit_result)).collect()
let mut h_commit_result: Vec<Point_BN254> =
(0..batch_size).map(|_| Point_BN254::zero()).collect();
d_commit_result.copy_to(&mut h_commit_result[..]).unwrap();

h_commit_result
.iter()
.map(|commit_result| c_from_icicle_point::<C>(*commit_result))
.collect()
}
38 changes: 21 additions & 17 deletions halo2_proofs/src/plonk/permutation/prover.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -177,7 +177,7 @@ impl Argument {
let permutation_product_poly = z.clone();
let permutation_product_coset = domain.coeff_to_extended(z.clone());
let permutation_product_blind = blind;

sets.push(CommittedSet {
permutation_product_poly,
permutation_product_coset,
Expand All @@ -187,30 +187,34 @@ impl Argument {

#[cfg(feature = "icicle_gpu")]
if std::env::var("ENABLE_ICICLE_GPU").is_ok() && icicle::is_small_circuit(z_set[0].len()) {
let permutation_product_commitment_projectives = params.commit_lagrange_batch(&z_set, &blind_set);
permutation_product_commitment_projectives.iter().for_each(|commitment_projective| {
let permutation_product_commitment = commitment_projective.to_affine();
let permutation_product_commitment_projectives =
params.commit_lagrange_batch(&z_set, &blind_set);
permutation_product_commitment_projectives
.iter()
.for_each(|commitment_projective| {
let permutation_product_commitment = commitment_projective.to_affine();

// Hash the permutation product commitment
transcript.write_point(permutation_product_commitment).unwrap();
});
transcript
.write_point(permutation_product_commitment)
.unwrap();
});

return Ok(Committed { sets });
}

//NOTE: Since commit_lagrange checks for icicle_gpu feature internally, we can delegate the decision to fall back
// to CPU to it instead of duplicating code here for when icicle_gpu is not enabled
z_set
.iter()
.zip(blind_set.iter())
.for_each(|(z, blind)| {
let permutation_product_commitment_projective = params.commit_lagrange(&z, *blind);
let permutation_product_commitment =
permutation_product_commitment_projective.to_affine();

// Hash the permutation product commitment
transcript.write_point(permutation_product_commitment).unwrap();
});
z_set.iter().zip(blind_set.iter()).for_each(|(z, blind)| {
let permutation_product_commitment_projective = params.commit_lagrange(&z, *blind);
let permutation_product_commitment =
permutation_product_commitment_projective.to_affine();

// Hash the permutation product commitment
transcript
.write_point(permutation_product_commitment)
.unwrap();
});

Ok(Committed { sets })
}
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