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1. The future trends on hardware/software codesigns
2. The most profitable and promising system that adapts HW/SW codesign concept.
3. A project proposal for your successful venture business on the application system you have chosen in 2)
4. Âü°í¹®Çå
Suppose that you are going to start a new venture business in the field of hardware/software codesign to develop a system of high performance or low power.
1) What is the future trends on hardware/software codesigns?
ÃÖ±ÙÀÇ °í¼º´É ¸¶ÀÌÅ©·ÎÇÁ·Î¼¼¼(microprocessor)µéÀº ILP(Instruction Level Parallelism) Çâ»óÀ» À§ÇÏ¿© ÄÄÆÄÀÏ·¯¿¡ ÀÇÇØ Á¦¾îµÉ ¼ö ÀÖ´Â ±¸Á¶¸¦ Áö¿øÇÏ°í ÀÖ´Ù. µû¶ó¼, ¸¶ÀÌÅ©·Î ÇÁ·Î¼¼¼µéÀº ´Ü¼øÇÑ Ä¨ Á¦ÀÛ ±â¼úÀÌ ¾Æ´Ï¶ó Çϵå¿þ¾î¿Í ¼ÒÇÁÆ®¿þ¾î°¡ °áÇÕµÈ º¹ÇÕ ±â¼úÀÇ ÇüŸ¦ ÃëÇÏ°í ÀÖ´Ù. ÀÌ·¯ÇÑ ¸¶ÀÌÅ©·ÎÇÁ·Î¼¼¼µéÀ» ILP ÇÁ·Î¼¼¼¶ó°í Çϴµ¥ À̵éÀÌ Ã¤ÅÃÇÏ°í ÀÖ´Â ´ëÇ¥ÀûÀÎ ±â¼ú·Î´Â ½´ÆÛ½ºÄ®¶ó(su¡¦(»ý·«)
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ÃÖ±Ù À̸¦ º¸¿ÏÇÒ ¼ö ÀÖ´Â ¹æ¹ýÀ¸·Î ÄÄÆÄÀÏ·¯ÀÇ ¿ªÇÒÀ» Áõ´ë½ÃÅ°°í ÀÖ´Ù. ƯÈ÷ VLIWÀÇ ¾ÆÅ°ÅØÃÄ-HP(Hewlett-Packard)¿Í IntelÀÇ Â÷¼¼´ë ÇÁ·Î¼¼¼ÀÎ ¸Ó½Ãµå(merced) ¾ÆÅ°ÅØÃÄÀÇ IA-64 ¸í·É¾î ¼¼Æ®(instruction set) ¹ßÇ¥½Ã¿¡ óÀ½ »ç¿ëµÈ ¿ë¾î´Â ÄÄÆÄÀÏ·¯°¡ Á¶°Ç ºÐ±â(conditional branch) ¸í·ÉÀ» ÁÙÀÓÀ¸·Î½á ÄÚµå ½ºÄÉÁì(code schedule)ÀÇ °¡´É¼ºÀ» Áõ°¡½ÃÅ°´Â Á¶°Ç½ÇÇà(branch prediction)À» ÅëÇÏ¿© Àû±ØÀûÀ¸·Î ¸í·ÉµéÀ» À̵¿½ÃÅ°´Â Åõ±âÀû ½ÇÇà(speculative execution)À» ÅëÇÕÇÏ¿© ¼º´ÉÀ» ±Ø´ëÈÇÏ°íÀÚ ÇÏ´Â »õ·Î¿î ¹æ¹ýÀ» ½ÃµµÇÏ°í ÀÖ´Ù.
ÄÄÆÄÀÏ·¯ÀÇ ¿ªÇÒÀ» Áõ´ë½ÃÅ°´Â ¹æ¹ý Áß Çϵå¿þ¾î ÀÚ¿ø(resource)ÀÎ ·¹Áö½ºÅ͸¦ ÀûÀýÈ÷ ÀÌ¿ëÇϵµ·Ï ÇÏ´Â °ÍÀÌ ÃÖÀûÈ ÄÄÆÄÀÏ·¯(optimizing compiler)°¡ ÇؾßÇÒ ÇʼöÀûÀÎ ¿ä¼Ò ÁßÀÇ ÇϳªÀÌ´Ù. ÀÌ·¯ÇÑ ·¹Áö½ºÅÍ ÇÒ´ç(register allocation) ±â¹ýÀº ¸Þ¸ð¸® ÂüÁ¶(memory reference)°¡ ·Îµå(load), ½ºÅä¾î(store)¿¡¼¸¸ ¹ß»ýÇÏ´Â RISC(Reduced Instruction Set Computer)Çü ÇÁ·Î¼¼¼µé¿¡¼´Â ÇʼöÀûÀε¥ ¸Þ¸ð¸® ·Îµå, ½ºÅä¾î ´ë½Å¿¡ °¡´ÉÇÑ ºü¸¥ ÀúÀåÀåÄ¡ÀÎ ·¹Áö½ºÅ͸¦ ÀÌ¿ëÇÏ°í ¸Þ¸ð¸® ÂüÁ¶´Â ±Ø¼ÒÈÇÒ ¼ö ÀÖµµ·Ï ·¹Áö½ºÅÍ¿¡ º¯¼öµéÀ» ÀûÀýÈ÷ ÇÒ´çÇØ ÁÖ¾î¾ß ÇÑ´Ù.
ÃÖ±Ù RISC ÇÁ·Î¼¼¼µéÀÇ ¹ßÀüÀ¸·Î ·¹Áö½ºÅÍÀÇ ¿ä±¸°¡ °è¼Ó Áõ°¡ÇÏ´Â Ãß¼¼¿¡ Àֱ⠶§¹®¿¡ À̸¦ È¿°úÀûÀ¸·Î ÀÌ¿ëÇÏ´Â °ÍÀº ´õ¿í Áß¿äÇØÁö°í ÀÖ´Ù. ±×¸®°í ´õ¿í ¸¹Àº ¸í·É¾î ¼öÁØ¿¡¼ÀÇ º´·Ä¼ºÀ» ÃßÃâÇϱâ À§Çؼ´Â ¿ø½ÃÇÁ·Î±×·¥(original program)ÀÇ Àǹ̸¦ À¯ÁöÇÏ¸é¼ ¸í·É¾îµéÀ» ÀçÁ¤·Ä(reordering)Çϱâ À§ÇÑ ÄÚµå ½ºÄÉÁ층(code scheduling) ±â¹ýµµ ¼º´É Çâ»óÀ» À§ÇÑ Áß¿äÇÑ ÃÖÀûÈ ±â¹ýÀÌ´Ù. ÄÚµå ½ºÄÉÁ층À» È¿°úÀûÀ¸·Î ¼öÇàÇÏ°Ô µÇ¸é º´·Ä ¼öÇàÇÒ ¼ö ÀÖ´Â ¸í·É¾îÀÇ ¼ö°¡ ¸¹¾ÆÁ® ¼º´ÉÀ» Å©°Ô °³¼±ÇÒ ¼ö ÀÖ´Ù.
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