shiftl(x, shift): Shift Left¶

Logical shift left function.

Declaration¶

Syntax¶

retval = shiftl(int(number), 31);
integer(int32) function shiftli32(i, shift)

Arguments¶

x is an integer input value.

shift an unsigned integer value less than or equal to the bit size of x. The possible values are 7, 31, and 63.

Return values¶

The return value is of type integer and of the same kind as x.

Description¶

shiftl(x, shift) logically left shifts x by shift number of bits. shiftl shifts from LSB(Least Significant Bit) to MSB(Most Significant Bit). Bits shifted from the left end i.e., MSB bits are lost. Zeroes are appended to the opposite right end.

Types¶

Supported types in unsigned integer value x and unsigned integer value shift from (7, 31, 63) less than or equal to bit size of x.

interface shiftl
    module procedure shiftli8, shiftli32, shiftli64
end interface

contains

interface
    integer(int8) function shiftli8(i, shift) result(r)
	integer(int8), intent(in) :: i
	integer :: shift
	end function

	integer(int32) function shiftli32(i, shift) result(r)
	integer(int32) :: i
	integer :: shift
	end function

	integer(int64) function shiftli64(i, shift) result(r)
	integer(int64) :: i
	integer :: shift
	end function
end interface

Examples¶

program intrinsics_shiftl
    implicit none
    integer, parameter :: x = kind(2)
    integer :: retval
    retval = shiftl(int(x), 7)
    print *, retval
end program

Result: