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Asked: Jan 18,2021 In: Assembly

Set on Less Than Immediate Unsigned: Range of representable integers - MIPS

I am currently writing a seminar paper about machine-language and MIPS and when studying the Set on Less Than Immediate Unsigned Instruction I found something weird I don't understand. The MIPS v5 ...

assembly mips twos-complement immediate-operand

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Asked: Jan 18,2021 In: Assembly

TAS instruction 68000

To handle concurrency in an M680000 assembly program, I need to understand how the TAS instruction works. I don't really care about the theoretical description that I can see from the manual (e.g. ...

assembly 68000 test-and-set

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1 Answer

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Asked: Jan 18,2021 In: Assembly

x86 SIMD instructions 16 byte alignment in assembly (Without C intrinsics)

Let's say that I have an array of 8 byte elements of unknown length from memory passed to my assembly function. I want to do some 128 bit SIMD operations (up to SSE4) on it. It is better that the ...

assembly x86-64 sse simd memory-alignment

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1 Answer

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Asked: Jan 18,2021 In: Assembly

reference variables without constraint inline assembly

I want to use inline-assembly in a C program, without using constraints, since I don't want to have to explain that in my complex enough school paper. I'm attempting to xor some characters with a key. ...

c assembly gcc compiler-errors inline-assembly

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Asked: Jan 18,2021 In: Assembly

How to read this line with three(?) operands? [closed]

I'm trying to understand the basics but so far I can only see examples with two operands: ADD <target> <source> means, the values in the <> brackets are summed and stored in < ...

assembly

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15 Views

Asked: Jan 18,2021 In: Assembly

Difference between lod and sto [closed]

What is the difference between these code lines: LOD R4 R5 STO R4 R5 ? So far I know the following: LOD R4 R5 => R4 = Memory[R5] STO R4 R5 => Memory[R4] = R5 But I don't get the difference. ...

assembly

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1 Answer

10 Views

Asked: Jan 18,2021 In: Assembly

building kernel creates a file with very big size [duplicate]

I am writing a very simple kernel for my simple os here is the code: void start() { char* video_memory = (char*)0xb8000; *video_memory = 'x'; } I use this command to compile: gcc -m32 -fno-...

gcc assembly x86 nasm ld

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Asked: Jan 18,2021 In: Assembly

Assembler tasm display ax register [duplicate]

I have the result in register ax in hexadecimal (e.g 0046 and must be showed 70 in decimal). How do I display it? .model small .stack .data mesaj1 db 13,10,'a= $' mesaj2 db 13,19, 'b= $' mesaj_final ...

assembly dos x86-16 integer-division signed-integer

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13 Views

Asked: Jan 18,2021 In: Assembly

Assembly code within C (ARMv8 architecture)

i am working on a Cortex-A72 (Armv8) and i need to implement this pseudocode: put addr1 into X9 put addr2 into X10 for i := 0 to N − 1 do STR X0, [X9] STR X0, [X10] DC CVAC, X9 DC CVAC, X10 Following ...

c assembly inline-assembly armv8

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Asked: Jan 18,2021 In: Assembly

How can I fix the length of a string in printf when called from RISC-V assembly?

I want to get some output on a RISC-V program (assembly) running on top of pk on Spike using newlib. I can call printf with null terminated strings eg (snippet) la a0 msg_ jal printf .data msg_ ....

assembly c-strings libc calling-convention riscv

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Asked: Jan 18,2021 In: Assembly

How to fix exec format error on 64-bit Linux?

I am learning x86_64 assembly. But I have run into the following problem: I am assembling a program with gcc -g -c exercise1.s -o exercise1.o and linking it with ld -g -o exercise1 exercise1.o -m ...

linux assembly x86-64

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Asked: Jan 18,2021 In: Assembly

x86 XMM register bit relocation [duplicate]

The following should be done in x86 assembly (up to SSE4) language. Lets say I have a 128 bit XMM register: xmm0: [d, c, b, a] And I want another register which look like this: xmm1: [-,-, c, d] For ...

assembly x86 sse

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Asked: Jan 18,2021 In: Assembly

Some arm assembly questions I couldn't solve [closed]

1 - When it comes to the control that will occur in the ARM single loop bus, the command given below. 2 - A new ARM Assembly command is being generated. This command STRI Rd, Ra, index in the form. ...

assembly arm cpu-architecture

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Asked: Jan 18,2021 In: Assembly

How can I find the prototypes for the following functions and Structure

-- NTDLL.DLL -- Functions: NtPssCaptureVaSpaceBulk, NtAllocateUserPhysicalPagesEx, NtAcquireCrossVmMutant, NtCreateCrossVmMutant, NtDirectGraphicsCall, NtWriteErrorLogEntry, NtCreateWinStation, ...

windows assembly struct system-calls function-prototypes

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Asked: Jan 18,2021 In: Assembly

Printing the product in assembly

I have to print the product of a mull %ebx, I don't know how to print the product because it is in EDX:EAX and I suppose it isn't the same to print a string which is saved in only one register.

assembly x86 att

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