wip: start moving starky to no-std

Signed-off-by: Brandon H. Gomes <bhgomes@pm.me>

ecdsa/Cargo.toml

@@ -3,6 +3,9 @@ name = "plonky2_ecdsa"
 version = "0.1.0"
 edition = "2021"
 
+[features]
+parallel = ["maybe_rayon/parallel", "plonky2/parallel"]
+
 [dependencies]
 anyhow = { version = "1.0.40", default-features = false }
 itertools = { version = "0.10.0", default-features = false }

ecdsa/src/curve/curve_msm.rs

@@ -1,7 +1,7 @@
 use alloc::vec::Vec;
 
 use itertools::Itertools;
-use maybe_rayon::{MaybeIntoParIter, MaybeParChunks};
+use maybe_rayon::*;
 use plonky2::field::types::{Field, PrimeField};
 
 use crate::curve::curve_summation::affine_multisummation_best;

field/src/lib.rs

@@ -7,7 +7,6 @@
 #![allow(clippy::return_self_not_must_use)]
 #![feature(generic_const_exprs)]
 #![feature(specialization)]
-#![feature(stdsimd)]
 #![cfg_attr(not(test), no_std)]
 
 extern crate alloc;

insertion/src/insertion_gate.rs

@@ -1,5 +1,5 @@
-use std::marker::PhantomData;
-use std::ops::Range;
+use core::marker::PhantomData;
+use core::ops::Range;
 
 use plonky2::field::extension::{Extendable, FieldExtension};
 use plonky2::field::types::Field;

maybe_rayon/Cargo.toml

@@ -3,7 +3,6 @@ name = "maybe_rayon"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [features]
 parallel = ["rayon"]
 

maybe_rayon/src/lib.rs

@@ -1,13 +1,16 @@
 #[cfg(not(feature = "parallel"))]
-use std::{
+use core::{
     iter::{FlatMap, IntoIterator, Iterator},
     slice::{Chunks, ChunksExact, ChunksExactMut, ChunksMut},
 };
 
 #[cfg(feature = "parallel")]
-pub use rayon::prelude::{
-    IndexedParallelIterator, ParallelDrainFull, ParallelDrainRange, ParallelExtend,
-    ParallelIterator,
+pub use rayon::{
+    self,
+    prelude::{
+        IndexedParallelIterator, ParallelDrainFull, ParallelDrainRange, ParallelExtend,
+        ParallelIterator,
+    },
 };
 #[cfg(feature = "parallel")]
 use rayon::{

plonky2/Cargo.toml

@@ -41,7 +41,6 @@ num_cpus = { version = "1.14.0", default-features = false }
 plonky2 = { path = "." }
 rand = { version = "0.8.4", default-features = false, features = ["getrandom"] }
 rand_chacha = { version = "0.3.1", default-features = false }
-rayon = { version = "1.5.1", default-features = false }
 serde_cbor = { version = "0.11.2" }
 structopt = { version = "0.3.26", default-features = false }
 tynm = { version = "0.1.6", default-features = false }

plonky2/benches/hashing.rs

@@ -1,6 +1,3 @@
-#![allow(incomplete_features)]
-#![feature(generic_const_exprs)]
-
 mod allocator;
 
 use criterion::{criterion_group, criterion_main, BatchSize, Criterion};

plonky2/benches/merkle.rs

@@ -1,6 +1,3 @@
-#![allow(incomplete_features)]
-#![feature(generic_const_exprs)]
-
 mod allocator;
 
 use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion};
@@ -14,10 +11,7 @@ use tynm::type_name;
 
 const ELEMS_PER_LEAF: usize = 135;
 
-pub(crate) fn bench_merkle_tree<F: RichField, H: Hasher<F>>(c: &mut Criterion)
-where
-    [(); H::HASH_SIZE]:,
-{
+pub(crate) fn bench_merkle_tree<F: RichField, H: Hasher<F>>(c: &mut Criterion) {
     let mut group = c.benchmark_group(&format!(
         "merkle-tree<{}, {}>",
         type_name::<F>(),

plonky2/examples/bench_recursion.rs

@@ -2,8 +2,6 @@
 // custom CLI argument parsing (even with harness disabled). We could also have
 // put it in `src/bin/`, but then we wouldn't have access to
 // `[dev-dependencies]`.
-#![allow(incomplete_features)]
-#![feature(generic_const_exprs)]
 
 use core::num::ParseIntError;
 use core::ops::RangeInclusive;
@@ -11,6 +9,7 @@ use core::str::FromStr;
 
 use anyhow::{anyhow, Context as _, Result};
 use log::{info, Level, LevelFilter};
+use maybe_rayon::rayon;
 use plonky2::gates::noop::NoopGate;
 use plonky2::hash::hash_types::RichField;
 use plonky2::iop::witness::{PartialWitness, Witness};
@@ -18,7 +17,7 @@ use plonky2::plonk::circuit_builder::CircuitBuilder;
 use plonky2::plonk::circuit_data::{
     CircuitConfig, CommonCircuitData, VerifierCircuitTarget, VerifierOnlyCircuitData,
 };
-use plonky2::plonk::config::{AlgebraicHasher, GenericConfig, Hasher, PoseidonGoldilocksConfig};
+use plonky2::plonk::config::{AlgebraicHasher, GenericConfig, PoseidonGoldilocksConfig};
 use plonky2::plonk::proof::{CompressedProofWithPublicInputs, ProofWithPublicInputs};
 use plonky2::plonk::prover::prove;
 use plonky2::util::timing::TimingTree;
@@ -65,10 +64,7 @@ struct Options {
 fn dummy_proof<F: RichField + Extendable<D>, C: GenericConfig<D, F = F>, const D: usize>(
     config: &CircuitConfig,
     log2_size: usize,
-) -> Result<ProofTuple<F, C, D>>
-where
-    [(); C::Hasher::HASH_SIZE]:,
-{
+) -> Result<ProofTuple<F, C, D>> {
     // 'size' is in degree, but we want number of noop gates. A non-zero amount of padding will be added and size will be rounded to the next power of two. To hit our target size, we go just under the previous power of two and hope padding is less than half the proof.
     let num_dummy_gates = match log2_size {
         0 => return Err(anyhow!("size must be at least 1")),
@@ -106,7 +102,6 @@ fn recursive_proof<
 ) -> Result<ProofTuple<F, C, D>>
 where
     InnerC::Hasher: AlgebraicHasher<F>,
-    [(); C::Hasher::HASH_SIZE]:,
 {
     let (inner_proof, inner_vd, inner_cd) = inner;
     let mut builder = CircuitBuilder::<F, D>::new(config.clone());
@@ -150,10 +145,7 @@ fn test_serialization<F: RichField + Extendable<D>, C: GenericConfig<D, F = F>,
     proof: &ProofWithPublicInputs<F, C, D>,
     vd: &VerifierOnlyCircuitData<C, D>,
     cd: &CommonCircuitData<F, D>,
-) -> Result<()>
-where
-    [(); C::Hasher::HASH_SIZE]:,
-{
+) -> Result<()> {
     let proof_bytes = proof.to_bytes();
     info!("Proof length: {} bytes", proof_bytes.len());
     let proof_from_bytes = ProofWithPublicInputs::from_bytes(proof_bytes, cd)?;

starky/src/constraint_consumer.rs

@@ -1,4 +1,4 @@
-use std::marker::PhantomData;
+use core::marker::PhantomData;
 
 use plonky2::field::extension::Extendable;
 use plonky2::field::packed::PackedField;

starky/src/fibonacci_stark.rs

@@ -1,4 +1,4 @@
-use std::marker::PhantomData;
+use core::marker::PhantomData;
 
 use plonky2::field::extension::{Extendable, FieldExtension};
 use plonky2::field::packed::PackedField;

starky/src/prover.rs

@@ -1,4 +1,4 @@
-use std::iter::once;
+use core::iter::once;
 
 use anyhow::{ensure, Result};
 use itertools::Itertools;

starky/src/recursive_verifier.rs

@@ -1,4 +1,4 @@
-use std::iter::once;
+use core::iter::once;
 
 use anyhow::{ensure, Result};
 use itertools::Itertools;

starky/src/verifier.rs

@@ -1,4 +1,4 @@
-use std::iter::once;
+use core::iter::once;
 
 use anyhow::{anyhow, ensure, Result};
 use itertools::Itertools;