openvm_rv32im_circuit/jalr/
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, Chip,
7};
8use openvm_cuda_backend::{base::DeviceMatrix, prelude::F, GpuBackend};
9use openvm_cuda_common::copy::MemCopyH2D;
10use openvm_stark_backend::prover::AirProvingContext;
11
12use crate::{
13    adapters::{Rv32JalrAdapterCols, Rv32JalrAdapterRecord, RV32_CELL_BITS},
14    cuda_abi::jalr_cuda::tracegen,
15    Rv32JalrCoreCols, Rv32JalrCoreRecord,
16};
17#[derive(new)]
18pub struct Rv32JalrChipGpu {
19    pub range_checker: Arc<VariableRangeCheckerChipGPU>,
20    pub bitwise_lookup: Arc<BitwiseOperationLookupChipGPU<RV32_CELL_BITS>>,
21    pub timestamp_max_bits: usize,
22}
23
24impl Chip<DenseRecordArena, GpuBackend> for Rv32JalrChipGpu {
25    fn generate_proving_ctx(&self, arena: DenseRecordArena) -> AirProvingContext<GpuBackend> {
26        const RECORD_SIZE: usize = size_of::<(Rv32JalrAdapterRecord, Rv32JalrCoreRecord)>();
27        let records = arena.allocated();
28        if records.is_empty() {
29            return AirProvingContext::simple_no_pis(DeviceMatrix::dummy());
30        }
31        debug_assert_eq!(records.len() % RECORD_SIZE, 0);
32
33        let trace_width = Rv32JalrCoreCols::<F>::width() + Rv32JalrAdapterCols::<F>::width();
34        let trace_height = next_power_of_two_or_zero(records.len() / RECORD_SIZE);
35        let device_ctx = &self.range_checker.device_ctx;
36
37        let d_records = tracing::info_span!("trace_gen.h2d_records")
38            .in_scope(|| records.to_device_on(device_ctx))
39            .unwrap();
40        let d_trace = DeviceMatrix::<F>::with_capacity_on(trace_height, trace_width, device_ctx);
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                device_ctx.stream.as_raw(),
52            )
53            .unwrap();
54        }
55        AirProvingContext::simple_no_pis(d_trace)
56    }
57}
openvm_rv32im_circuit/jalr/cuda.rs

openvm_rv32im_circuit/jalr/
cuda.rs
