zk_evm 0.153.12

ZKsync out-of-circuit EraEVM implementation
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63

use super::*;
use crate::zkevm_opcode_defs::{BinopOpcode, Opcode};

impl<const N: usize, E: VmEncodingMode<N>> DecodedOpcode<N, E> {
    pub fn binop_opcode_apply<
        S: zk_evm_abstractions::vm::Storage,
        M: zk_evm_abstractions::vm::Memory,
        EV: zk_evm_abstractions::vm::EventSink,
        PP: zk_evm_abstractions::vm::PrecompilesProcessor,
        DP: zk_evm_abstractions::vm::DecommittmentProcessor,
        WT: crate::witness_trace::VmWitnessTracer<N, E>,
    >(
        &self,
        vm_state: &mut VmState<S, M, EV, PP, DP, WT, N, E>,
        prestate: PreState<N, E>,
    ) {
        let PreState {
            src0,
            src1,
            dst0_mem_location,
            new_pc,
            ..
        } = prestate;
        let PrimitiveValue {
            value: src0,
            is_pointer: _,
        } = src0;
        let PrimitiveValue {
            value: src1,
            is_pointer: _,
        } = src1;

        let inner_variant = match self.variant.opcode {
            Opcode::Binop(inner) => inner,
            _ => unreachable!(),
        };

        use crate::zkevm_opcode_defs::SET_FLAGS_FLAG_IDX;
        let set_flags = self.variant.flags[SET_FLAGS_FLAG_IDX];
        vm_state.local_state.callstack.get_current_stack_mut().pc = new_pc;
        // it is always XOR unless flags are set
        let result = match inner_variant {
            BinopOpcode::Xor => src0 ^ src1,
            BinopOpcode::And => src0 & src1,
            BinopOpcode::Or => src0 | src1,
        };
        if set_flags {
            let eq = result.is_zero();
            vm_state.reset_flags();
            vm_state.local_state.flags.equality_flag = eq;
        }
        let result = PrimitiveValue {
            value: result,
            is_pointer: false,
        };
        vm_state.perform_dst0_update(
            vm_state.local_state.monotonic_cycle_counter,
            result,
            dst0_mem_location,
            self,
        );
    }
}