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ESP toolchain binutils port

License: GNU General Public License v2.0

Makefile 18.24% M4 0.59% C 51.50% Objective-C 0.10% DIGITAL Command Language 0.03% Shell 0.57% Perl 0.11% C++ 6.16% Lex 0.22% Yacc 0.41% Groff 0.57% Emacs Lisp 0.02% Assembly 15.38% Rust 0.01% D 2.88% Mathematica 0.01% R 0.23% Scheme 1.10% Batchfile 0.01% DTrace 1.91%

esp-binutils-gdb's Introduction

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.

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esp-binutils-gdb's Issues

Misleading usage of `vf` instruction

The ISA spec leads one to believe that the vf instruction can be used by simply writing something like

vf csaxpy_worker_thread

but in reality just doing that makes the assembler complain about an illegal operand because there is no register included in the instruction.

Is it possible to have the assembler pick 'an unused general purpose register' in order to make vf generate something like the following

li t1, 0
auipc t1, 0
vf csaxpy_worker_thread(t1)

instead of having to write:

li t1, 0
vf csaxpy_worker_thread, t1

`vlsegxd` instruction is unimplemented.

`vsetcfg` lacks 4 operand variant.

According to the ISA spec:
'vsetcfg #v64, #pred, #v32, #v16...will also generate a sequence of instructions to build the corresponding 64 bit configuration object'

but at the moment, only the 2 operand version works, and the assembler throws:
'Error: Illegal operands vsetcfg #,#,#,#' where # is a number.

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