Cray CRAY-1 - Page 6

I
FUNCTIONAL UNITS . . . . . . . .
· . 3-10
Address functional units
Address add unit
Address multiply unit·
Scalar functional units
Scalar add unit
Scalar shift unit
Scalar logical unit
Population/leading zero count unit
Vector functional units ....... .
· . 3-11
· . 3-11
3-11
3-12
· . 3-12
· 3-12
· . 3-13
· . . 3-13
· 3-13
Vector functional unit reservation .. ·3-13
Recursive
characteristic of vector functional units 3-14
Vector
add unit . . . . . . . . . . . . . . 3-17
Vector shift unit
Vector logical unit
Vector population count unit.
Floating point functional units.
Floating point add unit
Floating point multiply unit.
Reciprocal approximation unit
· .. 3-17
· 3-17
· 3-18
· . 3-18
· . 3-18
· . 3-19
ARITHMETIC OPERATIONS
· . 3-19
· 3-20
.. 3-20
Integer arithmetic
Floating point arithmetic.
Normalized floating point
Floating point range errors .....
Floating point add unit
Floating point multiply unit.
· 3-21
· 3-22
3-22
.
...... 3-23
.. 3-23
Floating
point reciprocal approximation unit.
3-23
Double precision numbers.
Addition algorithm
Multiplication algorithm
Division algorithm
LOGICAL OPERATIONS
2240004
iv
· 3-24
3-24
· 3-25
· .. 3-30
·
3-31
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