Type Definition o1vm::interpreters::mips::column::MIPSWitness

pub type MIPSWitness<T> = Witness<N_MIPS_COLS, T>;

Expand description

Represents one line of the execution trace of the virtual machine It contain

SCRATCH_SIZE columns
1 column to keep track of the instruction index
1 column for the system error code
N_MIPS_SEL_COLS columns for the instruction selectors. The columns are, in order,

the 32 general purpose registers
the low and hi registers used by some arithmetic instructions
the current instruction pointer
the next instruction pointer
the heap pointer
the preimage key, splitted in 8 consecutive columns representing 4 bytes of the 32 bytes long preimage key
the preimage offset, i.e. the number of bytes that have been read for the currently processing preimage
[SCRATCH_SIZE] - 46 intermediate columns that can be used by the instruction set
the hash counter
the flag to indicate if the current instruction is a preimage syscall
the flag to indicate if the current instruction is reading a preimage
the number of bytes read so far for the current preimage
how many bytes are left to be read for the current preimage
the (at most) 4 bytes of the preimage key that are currently being processed
4 helpers to check if at least n bytes were read in the current row