prompter: write a sum function in asm

assistant: Certainly! Here's an example of a sum function in x86 assembly language:
```asm
section .text
global sum

sum:
  push ebp
  mov ebp, esp
  mov eax, [ebp+8] ; eax = first parameter
  mov ebx, [ebp+12] ; ebx = second parameter
  add eax, ebx ; eax = eax + ebx
  pop ebp
  ret
```
This function takes two parameters (the values to be added) and returns their sum. It uses the add instruction to perform the addition and then returns the result using the ret instruction.

I hope this helps! Let me know if you have any further questions.

prompter: Is that 16, 32 or 64 bits?

assistant: The code I provided is written in x86 assembly language, which is a family of instruction set architectures that supports 16-bit, 32-bit, and 64-bit processing modes.

In this case, the specific bit mode will depend on the environment in which the code is being executed. For example, if the code is running on a 32-bit operating system, it will use 32-bit registers and instructions, while on a 64-bit operating system, it will use 64-bit registers and instructions.

The example code I provided is written using 32-bit registers, but it can be modified to work with other bit modes as well.

prompter: Please convert this into Rust. Assume a vector of generic summable types as input.

assistant: The example I provided is written in x86 assembly language, which can be used for 16-bit, 32-bit, and 64-bit processors. However, the specific version of x86 assembly language used can vary depending on the processor architecture and operating system. The example I provided is written for a 32-bit architecture, but it can be modified for other architectures by adjusting the register names and addressing modes accordingly.

assistant: The code I provided is for 32-bit x86 architecture. If you need a sum function for a different architecture or bit-size, the code would need to be adjusted accordingly.

assistant: Okay, I understand you would like help writing an assembly language sum function, but I could use some more context to provide helpful guidance:

- What kind of numbers will the sum function be operating on (integers, floating point)?
- Is the sum function intended to operate on a fixed number of inputs or a variable number of inputs?
- What processor architecture is the assembly code intended to run on (x86, ARM, etc.)?

With more details about the required functionality and constraints, I can provide resources and advice for writing the assembly language code to implement the sum function. Please let me know if you have any other questions!

prompter: I would like it to run on a list of 32 bit floating point numbers, with the list size provided as a separate argument. Preferably to run on ARMv7.

assistant: Sure! Here's an example implementation of a sum function in ARMv7 assembly language that operates on a list of 32-bit floating-point numbers:

```assembly
.global sum_func
sum_func:
    push {lr}          // Save the link register on the stack
    mov r2, #0         // Initialize the sum to 0
    ldr r3, [r0]       // Load the first number from the list into r3
    flds s0, [r3]      // Convert the number to a floating-point value and load it into s0
    add r0, r0, #4     // Increment the list pointer to the next number
    sub r1, r1, #1     // Decrement the list size counter
sum_loop:
    cmp r1, #0         // Check if we've processed all numbers in the list
    beq sum_exit       // If so, exit the loop
    ldr r3, [r0]       // Load the next number from the list into r3
    flds s1, [r3]      // Convert the number to a floating-point value and load it into s1
    add r0, r0, #4     // Increment the list pointer to the next number
    sub r1, r1, #1     // Decrement the list size counter
    fadds s0, s0, s1   // Add the current number to the running sum
    b sum_loop         // Jump back to the top of the loop
sum_exit:
    fsts s0, [r2]      // Store the final sum in the memory location pointed to by r2
    pop {pc}           // Restore the link register and return from the function
```
Here's an explanation of what each line does:

- .global sum_func: Declare the function as a global symbol that can be used in other code.
- sum_func:: Define the entry point of the function.
- push {lr}: Save the link register on the stack so we can return from the function later.
- mov r2, #0: Initialize a register to hold the sum of the numbers.
- ldr r3, [r0]: Load the first number from the list into a register.
- flds s0, [r3]: Convert the number to a floating-point value and load it into a floating-point register.
- add r0, r0, #4: Increment the list pointer to the next number.
- sub r1, r1, #1: Decrement the list size counter.
- cmp r1, #0: Check if we've processed all the numbers in the list.
- beq sum_exit: If we have, exit the loop and go to the end of the function.
- ldr r3, [r0]: Load the next number from the list into a register.
- flds s1, [r3]: Convert the number to a floating-point value and load it into a floating-point register.
- add r0, r0, #4: Increment the list pointer to the next number.
- sub r1, r1, #1: Decrement the list size counter.
- fadds s0, s0, s1: Add the current number to the running sum.
- b sum_loop: Jump back to the top of the loop.
- sum_exit:: The end of the function.
- fsts s0, [r2]: Store the final sum in the memory location pointed to by r2.
- pop {pc}

assistant: ```bash
section .text
global _sum

_sum:
    push ebp
    mov ebp, esp
    push ebx
    mov ebx, [ebp + 8] ; get the first argument
    mov ecx, [ebp + 12] ; get the second argument
    add eax, ebx ; add the first argument to the result
    add eax, ecx ; add the second argument to the result
    pop ebx
    leave
    ret
```

prompter: what is the programming language used