iWMMX / iWMMXt - Intel XScale SIMD instructions

췟 -_-
우연히 MPlayer 컴파일 하다가 발견했는데
집에 굴러 다니는 녀석은 PXA255.. -_-
해당사항이 없네? ㅠㅠ

Intel's and Marvell's XScale microprocessor core starting with PXA270 include an SIMD instruction set extension to the ARM core called iwMMXt whose functions are similar to those of the IA-32 MMX extension. iwMMXt stands for "Intel Wireless MMX Technology". It provides arithmetic and logic operations on 64-bit integer numbers (the software may choose to instead perform two 32-bit, four 16-bit or eight 8-bit operations in a single instruction). The extension contains 16 data registers of 64-bits and eight control registers of 32-bits. All registers are accessed through standardARM architecture coprocessor mapping mechanism. iwMMXt occupies coprocessors 0 and 1 space, and some of itsopcodes clash with the opcodes of the earlier floating-point extension, FPA. Later versions of Marvell's ARM processors supports both WMMX (Wireless MMX) and WMMX2 (Wireless MMX2) support. [링크 : http://en.wikipedia.org/wiki/MMX_(instruction_set)#MMX_in_embedded_applications]

[링크 : https://gcc.gnu.org/onlinedocs/gcc-4.3.4/gcc/ARM-iWMMXt-Built_002din-Functions.html]