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Architecture de base d'un processeur embarqué - Moodle

Architecture de base d'un processeur embarqué - Moodle

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Technique d’optimisation pour le point flottant (suite)Déroulage <strong>de</strong> la boucle pour 4 itérationsB: LD F0, 0(R1)ADDD F4, F0, F2SD 0(R1), F4LD F6, -8(R1) ; retrait <strong>de</strong>s SUBI etADDD F8, F6, F2 ; BNEZ à chaqueSD -8(R1), F8 ; itérationLDADDDSDLDADDDSDF10, -16(R1)F12, F10, F2-16(R1), F12F14, -24(R1)F16, F14, F2-24(R1), F16SUBI R1, R1, #32BNEZ R1, B1 itération = 27 cycles250 itérations = 6750 cyclesA = 9000/6750 = 1.33Réf.: Computer <strong>Architecture</strong>, A Quantitative Approach, H&P, 1996. p228-251INF3610 Systèmes embarqués21

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