Advertisements In my source code I saw a weird behavior of arm compiler where it did redundant iteration over a string, which unnecessary. I display here a minimal example that shows that,and ask my question below that #include <string.h> #define MIN(x, y) (((x) < (y)) ? (x) : (y)) int MAX_FILE_NAME = 2500; int F(char… Read More unoptimized behaviour of arm compiler
Advertisements I have a AES variable that would like to force-load it to specific address in the bootloader application (Cortex-M7 based app). ARM GCC 10.3.1 compiler. it will be used in the later stage, by the main app. It is considered UNUSED in the bootloader app. Linker script memory definition /* Specify the memory areas… Read More ARM GCC force variable to be loaded in flash even if unused
Advertisements Does scalar mean an instruction works directly with floating points? I get that if you use vectors you use two or more objects but what about scalar? A lot of the instructions say scalar and they describe the inputs and outputs as floating point values. Like this one: FADD (scalar) This instruction adds the… Read More What does scalar mean in an ARM instruction?
Advertisements Being a newbie in Assembly language I managed to tripped up over this hello-world-like program: .global _start _start: ldr R0, =val mov R7, #1 svc 0 .data val: .word 0xffffffff My intent is just to load the val word into R0, so its value would be used as the program’s exit status (its the… Read More Can't load a word into register
Advertisements estoy tratando de descifrar como armar esta base datos, tengo la siguiente informació pero tengo dudas de donde colocar las claves foraneas ya que el esquema no está tan claro, agradeceria si me pudiesen dar una mano. Sobre todo en la relacion "one or many to one or many" con pregunta y etiqueta, un… Read More Duda base de datos MySql
Advertisements If I have a CPU/system with the following characteristics… 16 bit architecture (16 bit registers and bus) 8 total registers A set of 64 assembly instructions And assuming my assembly instructions follow the format… OPCode (6 bits) + Register (3 bits) + Register (3 bits) + Unused (4 bits) ** Example Instructions (below) **… Read More Understanding address assignment to registers via assembly instructions
Advertisements Hope someone can help explain why I keep getting the following error in Python. Python version: Python 3.10.4 OS: Windows 11 in a vm Steps to reproduce the error in REPL or JuyterLab. def minmax(items): return min(items), max(items) lst = [98, 34, 78, 1, 0, -10, -19, -1] (min, max) = minmax(lst) # **no… Read More Why do I keep getting the error "File "TypeError: 'int' object is not callable"?
Advertisements ARM website contains an explanation of a feature called "HUM" (hit-under-missing). It seems that "under" can be interpreted as "after" or "follow", meaning that the previous access is a miss, and the subsequence access is a hit. Is this understanding correct? And if, I am wondering is there special context for using the word… Read More What's the meaning of "under" in phrase "hit-under-miss"?
Advertisements I have a class that starts as follows: from collections import namedtuple class Parser: Rule = namedtuple(‘Rule’, [‘lhs’, ‘rhs’, ‘dot_pos’, ‘start_pos’, ‘end_pos’]) # __init__ … Since PyCharm detected all my tuple element namings correctly by giving me proper suggestions, I assumed I did it the right way so far, creating a little Rule class… Read More Python namedtuple: AttributeError: 'tuple' object has no attribute 'end_pos'
Advertisements I am taking an introductory course in Python and am currently discovering how to handle files using Python. I have a CSV file with a few student names, their majors and GPAs I am trying to handle the file on python to calculate and print the average of the GPAs This is a snippet… Read More CSV File Handling in Python and calculating values