vec_extracth
Purpose
Extracts an element from a pair of vectors using an index in reverse natural order.
Note: This built-in function
is valid only when the -mcpu option is set to target Power10 processors.
Syntax
d=vec_extracth(a,b,c)Result and argument types
The following table describes the types of the returned value and the function arguments.
| d | a | b | c |
|---|---|---|---|
| vector unsigned long long | vector unsigned char | vector unsigned char | unsigned int |
| vector unsigned long long | vector unsigned short | vector unsigned short | unsigned int |
| vector unsigned long long | vector unsigned int | vector unsigned int | unsigned int |
| vector unsigned long long | vector unsigned long long | vector unsigned long long | unsigned int |
Result value
Let v be a wide vector that consists of a concatenated with b. Let e be the element of
v starting at byte position c in the reverse natural byte order. Then doubleword element 1 of
d is set to
e, and doubleword element 0 of d is set to zero.
Note: The byte index
c must be
in the range 0 to 31, inclusive. The result is undefined if the byte index does not address an
element boundary.