At first glance, the AddressSpaceType looks very similar to the ArrayType, because they use identical syntax in CoreDSL. But they have a few key differences.
ArrayType
AddressSpaceType
Represents the concatenation of N elements of the underlying element type.
Represents some form of addressable memory. For example a register file, ROM or RAM.
Declaration in local scope: T array[N];
Declaration on ISA level: register T space[N];
Size: N * bitsizeof(T)
Size: 1 * bitsizeof(T)
Total combined size must not exceed Integer.MAX_VALUE bits.
May have arbitrarily many elements (BigInteger).
Can be copied and passed to functions.
Can not be copied or passed to functions.
toString: T[N] or T[?]
toString: T[address space N] or T[address space ?]
At first glance, the
AddressSpaceTypelooks very similar to theArrayType, because they use identical syntax in CoreDSL. But they have a few key differences.ArrayTypeAddressSpaceTypeT array[N];register T space[N];N * bitsizeof(T)1 * bitsizeof(T)Integer.MAX_VALUEbits.BigInteger).T[N]orT[?]T[address space N]orT[address space ?]