Why is my assembler subroutine for Shellsort not sorting the array when integrated with a C program
In a group work where we are trying to integrate an assembler subroutine for sorting numbers
We are passing the pointer to the array through the
We are using this function signature in the
We read the input from a file into the array:
We call the sorting routine like this:
So after running the program using
I expected the assembler routine to modify the array in place and return the sorted numbers.
The program runs without any errors, but the output file contains the same numbers in their original order, so the sorting routine didn’t work as expected.
Could someone help identify what’s wrong with the assembler code, especially how we’re passing the array and length through registers
ShellsortCCWe are passing the pointer to the array through the
RCXIntel 64CWe are using this function signature in the
CWe read the input from a file into the array:
We call the sorting routine like this:
So after running the program using
NASM 2.15GCC 11.2.0x86-6422.04I expected the assembler routine to modify the array in place and return the sorted numbers.
The program runs without any errors, but the output file contains the same numbers in their original order, so the sorting routine didn’t work as expected.
Could someone help identify what’s wrong with the assembler code, especially how we’re passing the array and length through registers
using RCX and RDX
