How to resolve the algorithm Bitwise operations step by step in the PureBasic programming language

Published on 12 May 2024 09:40 PM
#Purebasic

How to resolve the algorithm Bitwise operations step by step in the PureBasic programming language

Table of Contents

Problem Statement

Write a routine to perform a bitwise AND, OR, and XOR on two integers, a bitwise NOT on the first integer, a left shift, right shift, right arithmetic shift, left rotate, and right rotate. All shifts and rotates should be done on the first integer with a shift/rotate amount of the second integer. If any operation is not available in your language, note it.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Bitwise operations step by step in the PureBasic programming language

Source code in the purebasic programming language

Procedure Bitwise(a, b)
  Debug  a & b      ; And
  Debug a | b       ;Or
  Debug a ! b       ; XOr
  Debug ~a          ;Not
  Debug a << b      ; shift left
  Debug a >> b      ; arithmetic shift right
  ; Logical shift right and rotates are not available
  ; You can of use inline ASM to achieve this:
  Define Temp
  ; logical shift right
  !mov edx, dword [p.v_a]
  !mov ecx, dword [p.v_b]
  !shr edx, cl
  !mov dword [p.v_Temp], edx
  Debug Temp
  ; rotate left
  !mov edx, dword [p.v_a]
  !mov ecx, dword [p.v_b]
  !rol edx, cl
  !mov dword [p.v_Temp], edx
  Debug Temp
  ; rotate right
  !mov edx, dword [p.v_a]
  !mov ecx, dword [p.v_b]
  !ror edx, cl
  !mov dword [p.v_Temp], edx
  Debug Temp
EndProcedure

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