Lecture 5 Fixed Point vs Floating Point

• mémoire
• cours magistral
• mémoire - matière potentielle : p

Lecture 5 - Fixed point vs Floating point 5 - 1 Lecture 5 Fixed Point vs Floating Point Objectives: Understand fixed point representations Understand scaling, overflow and rounding in fixed point Understand Q-format Understand TMS320C67xx floating point representations Understand relationship between the two in C6x architecture Reference: What Every Computer Scientist Should Know About Floating-Point Arithmetic by David GoldbergACM Computing Surveys 23, 5 (March 1991). Lecture 5 - Fixed point vs Floating point 5 - 2 Q-Format number representation N-bit fixed point, 2's complement number is given by: Difficult to work with due to possible overflow & scaling problems Often normalise

• norm addsp adddp subsp subdp intsp intdp spint dpint sprtunc dptrunc dpsp
• ffff
• fractional representation