Struct LoadStoreInstruction

pub struct LoadStoreInstruction<T> {
    pub is_valid: T,
    pub opcode: T,
    pub is_load: T,
    pub load_shift_amount: T,
    pub store_shift_amount: T,
}

LoadStore Adapter handles all memory and register operations, so it must be aware of the instruction type, specifically whether it is a load or store LoadStore Adapter handles 4 byte aligned lw, sw instructions, 2 byte aligned lh, lhu, sh instructions and 1 byte aligned lb, lbu, sb instructions This adapter always batch reads/writes 4 bytes, thus it needs to shift left the memory pointer by some amount in case of not 4 byte aligned intermediate pointers

Fields

is_valid: T

is_valid is constrained to be bool

opcode: T

Absolute opcode number

is_load: T

is_load is constrained to be bool, and can only be 1 if is_valid is 1

load_shift_amount: T

Keeping two separate shift amounts is needed for getting the read_ptr/write_ptr with degree 2 load_shift_amount will be the shift amount if load and 0 if store

store_shift_amount: T

store_shift_amount will be 0 if load and the shift amount if store