H.J. Lu 3ae729d5a4 x86: Rewrite NOP generation for fill and alignment
Rewrite NOP generation for fill and code alignment by:

1. Add a 11-byte NOP with another 0x66 prefix.
2. Remove the multi-byte NOP entries which consist of 2 instructions.
3. Select proper NOPs based on ISA and processor tuning.
4. Generate multiple NOPs with the longer NOPs first followed by the
shorter NOP.
5. Use jump for larger NOP padding:
   a. > 8 bytes (2 NOPs) in 16-bit mode.
   b. > 14 bytes (2 NOPs) for older processors.
   c. > 77 bytes (7 NOPs) for newer processors.
6. Update MAX_MEM_FOR_RS_ALIGN_CODE to 4095.

	PR gas/22874
	* config/tc-i386.c (f32_5): Removed.
	(f32_8): Likewise.
	(f32_9): Likewise.
	(f32_10): Likewise.
	(f32_11): Likewise.
	(f32_12): Likewise.
	(f32_13): Likewise.
	(f32_14): Likewise.
	(f16_5): Likewise.
	(f16_6): Likewise.
	(f16_7): Likewise.
	(f16_8): Likewise.
	(jump_31): Likewise.
	(alt64_11): Likewise.
	(alt64_patt): Likewise.
	(jump_disp8): New.
	(jump32_disp32): Likewise.
	(jump16_disp32): Likewise.
	(alt_11): Likewise.
	(f32_patt): Updated.
	(f16_patt): Likewise.
	(alt_patt): Add alt_11.
	(i386_align_code): Merged with ...
	(i386_generate_nops): This.  Rewritten.
	(fits_in_imm7): Moved before i386_generate_nops.
	(fits_in_imm31): Likewise.
	* config/tc-i386.h (MAX_MEM_FOR_RS_ALIGN_CODE): Updated to
	4095.
	(i386_align_code): Removed.
	(HANDLE_ALIGN): Rewritten with i386_generate_nops.
	* doc/as.texinfo: Update limits of control byte for x86 .nops
	directive.
	* testsuite/gas/i386/i386.exp: Run nops-7 and x86-64-nops-7.
	* gas/testsuite/gas/i386/noavx-3.l: Updated.
	* gas/testsuite/gas/i386/nop-1.d: Likewise.
	* gas/testsuite/gas/i386/nop-1.s: Likewise.
	* gas/testsuite/gas/i386/nop-2.d: Likewise.
	* gas/testsuite/gas/i386/nop-2.s: Likewise.
	* gas/testsuite/gas/i386/nop-3.d: Likewise.
	* gas/testsuite/gas/i386/nop-4.d: Likewise.
	* gas/testsuite/gas/i386/nop-5.d: Likewise.
	* gas/testsuite/gas/i386/nop-5.s: Likewise.
	* gas/testsuite/gas/i386/nop-6.d: Likewise.
	* gas/testsuite/gas/i386/nop-bad-1.l: Likewise.
	* gas/testsuite/gas/i386/nops-1-core2.d: Likewise.
	* gas/testsuite/gas/i386/nops-1-i386-i686.d: Likewise.
	* gas/testsuite/gas/i386/nops-1-i386.d: Likewise.
	* gas/testsuite/gas/i386/nops-1-i686.d: Likewise.
	* gas/testsuite/gas/i386/nops-1-k8.d: Likewise.
	* gas/testsuite/gas/i386/nops-1.d: Likewise.
	* gas/testsuite/gas/i386/nops-2-core2.d: Likewise.
	* gas/testsuite/gas/i386/nops-2-i386.d: Likewise.
	* gas/testsuite/gas/i386/nops-2.d: Likewise.
	* gas/testsuite/gas/i386/nops-3-i386.d: Likewise.
	* gas/testsuite/gas/i386/nops-3-i686.d: Likewise.
	* gas/testsuite/gas/i386/nops-3.d: Likewise.
	* gas/testsuite/gas/i386/nops-4-i386.d: Likewise.
	* gas/testsuite/gas/i386/nops-4-i686.d: Likewise.
	* gas/testsuite/gas/i386/nops-4.d: Likewise.
	* gas/testsuite/gas/i386/nops-4a-i686.d: Likewise.
	* gas/testsuite/gas/i386/nops-5-i686.d: Likewise.
	* gas/testsuite/gas/i386/nops-5.d: Likewise.
	* gas/testsuite/gas/i386/nops-6.d: Likewise.
	* gas/testsuite/gas/i386/nops16-1.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nop-1.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nop-2.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nop-5.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-1-core2.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-1-g64.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-1-k8.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-1-pentium.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-1.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-2.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-3.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-4-core2.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-4-k8.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-4.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-5-k8.d: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-5.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-1-core2.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-1-k8.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-1-pentium.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-1.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-2.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-3.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-4-core2.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-4-k8.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-4.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-5-k8.d: Likewise.
	* gas/testsuite/gas/i386/ilp32/x86-64-nops-5.d: Likewise.
	* gas/testsuite/gas/i386/nops-7.d: New file.
	* gas/testsuite/gas/i386/nops-7.s: Likewise.
	* gas/testsuite/gas/i386/x86-64-nops-7.d: Likewise.
2018-03-07 04:18:56 -08:00
2018-03-07 16:56:31 +10:30
2018-03-07 16:56:39 +10:30
2018-02-06 18:17:39 +01:00
2018-03-03 11:34:26 +10:30
2018-03-06 13:27:12 -07:00
2018-03-07 16:56:39 +10:30
2014-11-16 13:43:48 +01:00
2014-11-16 13:43:48 +01:00
2014-11-16 13:43:48 +01:00
2016-01-12 08:44:52 -08:00
2014-11-16 13:43:48 +01:00
2014-11-16 13:43:48 +01:00
2014-11-16 13:43:48 +01:00

		   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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