بررسی تأثیر ریزدانگی در طراحی واحدهای قابل بازپیکربندی حساب دهدهی
الموضوعات :
سمانه امامی
1
(دانشگاه صنعتی امیرکبیر)
مهدي صدیقی
2
(دانشگاه صنعتي اميركبير)
الکلمات المفتاحية: حساب کامپیوتری سخت‌افزارهای دهدهی واحدهای قابل بازپیکربندی ریزدانگی,
ملخص المقالة :
امروزه استفاده از حساب دهدهی در بسیاری از کاربردها نظیر برنامه‌های مالی مورد توجه قرار گرفته است. شاید بتوان مهم‌ترین عامل تأثیرگذار در این زمینه را نیاز به دقت بیشتر در نمایش اعداد در این کاربردها دانست. در دهه‌های اخیر، مطالعات گسترده‌ای در زمینه طراحی سخت‌افزارهای حسابی دهدهی انجام گرفته که اغلب آنها طراحی‌های خاص‌منظوره و برخی نیز با در نظر گرفتن قابلیت بازپیکربندی بوده‌اند. اما تاکنون تحقیقی بر روی پارامترهای تأثیرگذار در طراحی سخت‌افزارهای قابل بازپیکربندی دهدهی از جمله سطح ریزدانگی و انعطاف‌پذیری آنها انجام نشده است. بررسی‌های ما نشان می‌دهد برای جمع‌کننده‌های دهدهی قابل بازپیکربندی، ریزدانگی سطح بیت مناسب نبوده و بهتر است برای این واحدها، ریزدانگی را در سطح یک یا حتی چند رقم دهدهی افزایش داد. این افزایش سطح ریزدانگی، منجر به حدود 12% بهبود در مساحت و 4/13% بهبود در توان مصرفی شده است. اما بر خلاف جمع‌کننده‌ها با افزایش ریزدانگی در واحدهای مورد نیاز ضرب‌کننده‌های دهدهی، مساحت و توان مصرفی حدود 75% افزایش می‌یابد.
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