Cray CRAY-1 - 046 Ijk Logical Difference of (Sj) and (Sk) to si; 047 I J K Logical Equivalence of (Sk) and Co~Plement of (Sk) to si; 050 I J K Scalar Merge

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044i j k
Logical
product of
(Sj) and (Sk) to Si
045i jk
Logical
product of
(Sj) and complement of
(Sk)
to Si
046ijk
Logical
difference of
(Sj) and (Sk) to Si
047i j k
Logical
equivalence of
(Sk) and (Sj)
to Si
050i j k
Scalar merge
051 i j k
Loqical
sum of (Sj) and (Sk) to Si
These instructions are executed in the scalar logical unit.
The 044 instruction forms the logical product (AND) of (Sj) and (Sk)
and enters the result into Si. Bits of Si are set to one when the
corresponding
bits of (Sj) and (Sk) are one as in the following example:
(Sj) = 1 1 0 0
(Sk) = 1 0 1 0
(Si) = 1 0 0 0
(Sj) is transmitted to Si if the j and k designators have the same non-
zero value. Si is cleared if the j designator is zero. The sign bit
of (Sj) is extracted into Si if the j designator is nonzero and the k
designator is zero.
The 045 instruction forms the logical product (AND) of (Sj) and the
complement of (Sk) and enters the result into Si. Bits of Si are set
to one when the corresponding bits of (Sj) and the complement of (Sk)
are one as in the following example:
(Sj) = 1 1 0 0
(Sk) = 1 0 1 0
(Si) = 0 1 0 0
Si is cleared if the j and k designators have the same value or if the
j designator is zero. (Sj) with the sign bit cleared is transmitted
to
Si if the j designator is non-zero and the k designator is zero.
2240004
4-35
E