インテル® Fortran コンパイラー 19.0 デベロッパー・ガイドおよびリファレンス
Portability Subroutines: Perform a bit-level set and clear for integers.
USE IFPORT
CALL BIC (bitnum, target)
CALL BIS (bitnum, target)
bitnum |
(Input) INTEGER(4). Bit number to set. Must be in the range 0 (least significant bit) to 31 (most significant bit) if target is INTEGER(4). If target is INTEGER(8), bitnum must be in range 0 to 63. |
target |
(Input) INTEGER(4) or INTEGER(8). Variable whose bit is to be set. |
BIC sets bit bitnum of target to 0; BIS sets bit bitnum to 1.
Consider the following:
USE IFPORT
integer(4) bitnum, target_i4
integer(8) target_i8
target_i4 = Z'AAAA'
bitnum = 1
call BIC(bitnum, target_i4)
target_i8 = Z'FFFFFFFF00000000'
bitnum = 40
call BIC(bitnum, target_i8)
bitnum = 0
call BIS(bitnum, target_i4)
bitnum = 1
call BIS(bitnum, target_i8)
print '(" integer*4 result ",Z)', target_i4
print '(" integer*8 result ",Z)', target_i8
end