y86 | Yet another Y86 implementation

by hczhcz C Version: Current License: No License

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kandi X-RAY | y86 Summary

y86 is a C library. y86 has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Yet another Y86 implementation ===. Y86 is a simplified x86-like instruction set. For more details: Chapter 4 of [CSAPP] This is a 'lab' (homework) in SE101/ICS (Introduction to Computer Systems). The original version is a 'pure' simulator, but I made a JIT compiler. cc -m32 -o y86sim y86sim.c (tested under Clang 3.2+). Y86 Simulator (the 'max' version) ---. The 'max' version looks like the normal one, but there is no step counting and non-static error detecting in it. It could execute most cases correctly and run (almost) as fast as native x86. But, it could not pass the ICS lab tests. This is also a 'lab' in SE101/ICS. The implementation is based on the original framework in the course. cc -m32 -o y86asm y86asm.c (tested under Clang 3.2+). -v print the readable output to screen. The simulator is released under WTFPL. Keep calm and have fun with it :) Feel free to send issues and PR to me. The assembler and the lab tests are not released under any license, so they can be used in education purpose only. To SE101 students: DO NOT CHEAT! The code is stored in the anti-cheating code base. You know.

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y86 has a low active ecosystem.

It has 61 star(s) with 13 fork(s). There are 3 watchers for this library.

It had no major release in the last 6 months.

There are 0 open issues and 1 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of y86 is current.

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y86 has 0 bugs and 0 code smells.

Security

y86 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

y86 code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

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y86 releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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y86 Examples and Code Snippets

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Community Discussions

Trending Discussions on y86

Why does this approach to drawing a line in an SVG element in react not work?

Drop All Rows After SECOND Occurrence of Column Value

tk.h looks for tcl.h in /usr/include but tcl.h is in /usr/include/tcl. I don't have write tk.h privilege to fix code

Why is writing considered an input operation and reading considered an output operation?

QUESTION

Why does this approach to drawing a line in an SVG element in react not work?

Asked 2022-Jan-05 at 16:08

I have created the following code with the intent of drawing a line between hundred points:

...

ANSWER

Answered 2022-Jan-05 at 13:38

The line element has four co-ordinate attributes — x1, x2, y1 and y2 — representing the start and end points of the line for the two axis.

All the other x* and y* attributes you provide are ignored.

You seem to be trying to use it to draw a polygon.

Source https://stackoverflow.com/questions/70593655

QUESTION

Drop All Rows After SECOND Occurrence of Column Value

Asked 2021-Sep-24 at 19:23

I'd like to drop all data in a .txt file that I've converted to a data frame after the second instance of a column value. In this case a delimiter "---".

Dataframe is constructed as follows:

...

ANSWER

Answered 2021-Sep-24 at 19:23

Find rows start with '---' and apply a cumulative sum then get the index of the first row equals to 2 and slice your dataframe to this index.

Source https://stackoverflow.com/questions/69319944

QUESTION

tk.h looks for tcl.h in /usr/include but tcl.h is in /usr/include/tcl. I don't have write tk.h privilege to fix code

Asked 2021-Feb-22 at 13:26

I am using Ubuntu 20.04.2 LTS via VMWare on macOS BigSur. I have the latest versions of tcl, tcl-dev, tk and tk-dev installed - version 8.6. I want to compile the source code for the Architecture lab project. The source code is from 2016 and located in the self-study handout. Compilation fails [with error messages detailed below], possibly due to the source code relying of tcl8.5 instead of the latest version. Would installing versions 8.5 of these packages solve the problem?

To make the GUIs work, in the project Makefile I need to assign one variable [which I have done] and update two more so that gcc can find the relevant libraries [libtcl.so and libtk.so] and header files [tcl.h and tk.h].

...

ANSWER

Answered 2021-Feb-22 at 13:26

Direct access to the Tcl_Interp struct has for long been deprecated. Given that this is a single source file (psim.c), you might want to patch it to properly use:

Tcl_SetResult(), for example: Change interp->result = "No arguments allowed"; to Tcl_SetResult(interp, "No arguments allowed", TCL_STATIC);
Tcl_GetStringResult(), for example: Change fprintf(stderr, "Error Message was '%s'\n", sim_interp->result); to fprintf(stderr, "Error Message was '%s'\n", Tcl_GetStringResult(sim_interp));

This is backwards compatible.

Not recommended, but doable: Set the macro

Source https://stackoverflow.com/questions/66291922

QUESTION

Why is writing considered an input operation and reading considered an output operation?

Asked 2020-Jul-01 at 21:39

I'm currently working my way through Computer Systems: A Programmer's Perspective 3, and in chapter 4 they consistently refer to read operations in the Y86 processor as being output from various CPU components and I don't understand why. Surely we would want to input data from memory into hardware component?

Here's a quote from the text alongside an accompanying diagram:

The Register file has four ports. It supports up to two simultaneous reads (on ports A and B) and two simultaneous writes (on ports E and M). Each port has both an address connection and a data connection, where the address connection is a register ID, and the data connection is a set of 64 wires serving as either an output word (for a read port) or an input word (for a write port) of the register file.

This correspondence has been consistent through the text

...

ANSWER

Answered 2020-Jul-01 at 21:39

It's just a matter of perspective:

A read port: a port from which you can read: i.e. data will flow from the register file to the reading entity, thus from the perspective of the register file implementation the data connection is an output wire.

Source https://stackoverflow.com/questions/62685557

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