ISHFT (The GNU Fortran Compiler) (original) (raw)
8.159 ISHFT — Shift bits ¶
Synopsis:
RESULT = ISHFT(I, SHIFT)
Description:
ISHFT returns a value corresponding to I with all of the bits shifted SHIFT places. A value of SHIFT greater than zero corresponds to a left shift, a value of zero corresponds to no shift, and a value less than zero corresponds to a right shift. If the absolute value of SHIFT is greater than BIT_SIZE(I), the value is undefined. Bits shifted out from the left end or right end are lost; zeros are shifted in from the opposite end.
Class:
Elemental function
Arguments:
| I | The type shall be INTEGER or UNSIGNED. |
|---|---|
| SHIFT | The type shall be INTEGER. |
Return value:
The return value is of type of I.
Specific names:
| Name | Argument | Return type | Standard |
|---|---|---|---|
| ISHFT(A) | INTEGER A | INTEGER | Fortran 90 and later |
| BSHFT(A) | INTEGER(1) A | INTEGER(1) | GNU extension |
| IISHFT(A) | INTEGER(2) A | INTEGER(2) | GNU extension |
| JISHFT(A) | INTEGER(4) A | INTEGER(4) | GNU extension |
| KISHFT(A) | INTEGER(8) A | INTEGER(8) | GNU extension |
Standard:
Fortran 90 and later, has overloads that are GNU extensions. Extension forUNSIGNED (see Unsigned integers)
See also: