Greetings to all !
I'm just wondering about something really confusing me so much !
once I'm writing in the compiler for instance visual stodio like this +2 or any immediate number (-5 , +6, etc) (( meaning with immediate number which they are not containers for saving data )), How pc is operating with them?! does the pc save them in register? if so, then they have an address which I can get them back ... but thats wrong and I don't know why, any help please?!
Literal's like that are stored in the machine language representation of the program itself. So, in a sense they do have an "address", but it's not one you generally have access to.
It's interesting that you used the proper technical term to describe them in assembly language: immediate.
Code:#include <stdio.h> int main() { int a = 24; a += 18; printf("%d\n", a); return 0; }Code:.file "immediate.c" .section .rodata .LC0: .string "%d\n" .text .globl main .type main, @function main: .LFB0: .cfi_startproc pushq %rbp .cfi_def_cfa_offset 16 .cfi_offset 6, -16 movq %rsp, %rbp .cfi_def_cfa_register 6 subq $16, %rsp movl $24, -4(%rbp) # there's the immediate 24 addl $18, -4(%rbp) # there's the immediate 18 movl -4(%rbp), %eax movl %eax, %esi movl $.LC0, %edi movl $0, %eax call printf movl $0, %eax leave .cfi_def_cfa 7, 8 ret .cfi_endproc
A little inaccuracy saves tons of explanation. - H.H. Munro
but why CPY is just understanding assembly language?! is it designed built in by this language?!Originally Posted by john.c
What's CPY?
Look up a C++ Reference and learn How To Ask Questions The Smart Way
I also don't understand what you are saying.
Perhaps you are unaware that all languages ultimately must become assembly language (actually machine language) before they can run on the computer. That's what the compiler or interpreter do, translate the higher-level language to something that the computer actually understands, its machine language.
BTW, quoting my post in toto (or at all) adds nothing to your question.
A little inaccuracy saves tons of explanation. - H.H. Munro
Sorry I'm meaning CPU
Please proofread your posts in the future so you don't waste people's time.Sorry I'm meaning CPU
A little inaccuracy saves tons of explanation. - H.H. Munro
