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OP7100 Memory, I/O Map, and Interrupt Vectors s 99
Table C-1. CM7000 Execution Times for Dynamic C
Operation
Execution Time
(µs)
DMA copy (per byte) 0.73
Integer assignment (
i=j;
) 3.4
Integer add (
j+k
;) 4.4
Integer multiply ( j*k; ) 18
Integer divide (
j/k;
) 90
Floating add (
p+q;
) (typical) 85
Floating multiply (
p*q;
) 113
Floating divide (
p/q;
) 320
Long add (
l+m;
) 28
Long multiply (
l*m;
) 97
Long divide (
l/m;
) 415
Floating square root (
sqrt(q);
) 849
Floating exponent (
exp(q
)
;
) 2503
Floating cosine (
cos(q);
) 3049
Execution Timing
The times reported in Table C-1 were measured using Dynamic C and they
reflect the use of Dynamic C libraries. The time required to fetch the
arguments from memory, but not to store the result, is included in the
timings. The times are for a 9.216 MHz clock with 0 wait states.
The execution times can be adjusted proportionally for clock speeds other
than 9.216 MHz. Operations involving one wait state will slow the
execution speed about 25%.