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/GNU Fortran 7

9.140 IBITS — Bit extraction

Description:

IBITS extracts a field of length LEN from I, starting from bit position POS and extending left for LEN bits. The result is right-justified and the remaining bits are zeroed. The value of POS+LEN must be less than or equal to the value BIT_SIZE(I).

Standard:

Fortran 95 and later, has overloads that are GNU extensions

Class:

Elemental function

Syntax:

RESULT = IBITS(I, POS, LEN)

Arguments:
I The type shall be INTEGER.
POS The type shall be INTEGER.
LEN The type shall be INTEGER.
Return value:

The return value is of type INTEGER and of the same kind as I.

Specific names:
Name Argument Return type Standard
IBITS(A) INTEGER A INTEGER Fortran 95 and later
BBITS(A) INTEGER(1) A INTEGER(1) GNU extension
IIBITS(A) INTEGER(2) A INTEGER(2) GNU extension
JIBITS(A) INTEGER(4) A INTEGER(4) GNU extension
KIBITS(A) INTEGER(8) A INTEGER(8) GNU extension
See also:

BIT_SIZE, IBCLR, IBSET, IAND, IOR, IEOR

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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gfortran/IBITS.html