Both the Vector/SIMD Multimedia Extension and SPU instruction sets have extensions that support C-language intrinsics. Intrinsics are C-language commands, in the form of function calls, that are convenient substitutes for one or more inline assembly-language instructions.
In a specific instruction set, most intrinsic names use a standard prefix in their mnemonic, and some intrinsic names incorporate the mnemonic of an associated assembly-language instruction. For example, the Vector/SIMD Multimedia Extension intrinsic that implements the add Vector/SIMD Multimedia Extension assembly-language instruction is named vec_add, and the SPU intrinsic that implements the stop SPU assembly-language instruction is named spu_stop.
|Types of Intrinsic||Definition||PPE||SPE|
|Specific||One-to-one mapping to a single assembly-language instruction.||X||X|
|Generic||Map to one or more assembly-language instructions, depending on types of input parameters.||X||X|
|Composite||Constructed from a sequence of Specific or Generic intrinsics.||X|
|Predicates||Evaluate SIMD conditionals.||X|
For more information about the PPE intrinsics, see C/C++ language extensions (intrinsics).
For more information about the SPE intrinsics, see SPU C/C++ language extensions (intrinsics).