openvm_rv32im_circuit/auipc/
cuda.rs

1use std::{mem::size_of, sync::Arc};
2
3use derive_new::new;
4use openvm_circuit::{arch::DenseRecordArena, utils::next_power_of_two_or_zero};
5use openvm_circuit_primitives::{
6    bitwise_op_lookup::BitwiseOperationLookupChipGPU, var_range::VariableRangeCheckerChipGPU,
7};
8use openvm_cuda_backend::{
9    base::DeviceMatrix, chip::get_empty_air_proving_ctx, prover_backend::GpuBackend, types::F,
10};
11use openvm_cuda_common::copy::MemCopyH2D;
12use openvm_stark_backend::{prover::types::AirProvingContext, Chip};
13
14use crate::{
15    adapters::{Rv32RdWriteAdapterCols, Rv32RdWriteAdapterRecord, RV32_CELL_BITS},
16    cuda_abi::auipc_cuda::tracegen,
17    Rv32AuipcCoreCols, Rv32AuipcCoreRecord,
18};
19
20#[derive(new)]
21pub struct Rv32AuipcChipGpu {
22    pub range_checker: Arc<VariableRangeCheckerChipGPU>,
23    pub bitwise_lookup: Arc<BitwiseOperationLookupChipGPU<RV32_CELL_BITS>>,
24    pub timestamp_max_bits: usize,
25}
26
27impl Chip<DenseRecordArena, GpuBackend> for Rv32AuipcChipGpu {
28    fn generate_proving_ctx(&self, arena: DenseRecordArena) -> AirProvingContext<GpuBackend> {
29        const RECORD_SIZE: usize = size_of::<(Rv32RdWriteAdapterRecord, Rv32AuipcCoreRecord)>();
30        let records = arena.allocated();
31        if records.is_empty() {
32            return get_empty_air_proving_ctx::<GpuBackend>();
33        }
34        debug_assert_eq!(records.len() % RECORD_SIZE, 0);
35
36        let trace_width = Rv32AuipcCoreCols::<F>::width() + Rv32RdWriteAdapterCols::<F>::width();
37        let trace_height = next_power_of_two_or_zero(records.len() / RECORD_SIZE);
38
39        let d_records = records.to_device().unwrap();
40        let d_trace = DeviceMatrix::<F>::with_capacity(trace_height, trace_width);
41
42        unsafe {
43            tracegen(
44                d_trace.buffer(),
45                trace_height,
46                &d_records,
47                &self.range_checker.count,
48                &self.bitwise_lookup.count,
49                RV32_CELL_BITS,
50                self.timestamp_max_bits as u32,
51            )
52            .unwrap();
53        }
54        AirProvingContext::simple_no_pis(d_trace)
55    }
56}
openvm_rv32im_circuit/auipc/cuda.rs

openvm_rv32im_circuit/auipc/
cuda.rs
