preprocessor/6339: Problem with assembling the LDMXCSR instruction

[fmfkrauss at mindspring dot com]

>Number:         6339
>Category:       preprocessor
>Synopsis:       Problem with assembling the LDMXCSR instruction
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Wed Apr 17 10:46:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Frank Krauss
>Release:        gcc version egcs-2.91.66 19990314 (egcs-1.1.2 release)
>Organization:
>Environment:
Hardware
   Pentium-4 P.C.
   Chipset - Intel 850
   Ram     - 256 Mb.
Software
   Distribution     - Caldera 2.3
   Kernel           - 2.4.18
   Processor family - Pentium-4
   Binutils         - 2.11.2
   GCC              - egcs-2.91.66
   AS               - GNU assembler 2.11.2	  
>Description:
Output of executing the following command:-
gcc ldmxcsr.s
    ldmxcsr.s: Assembler messages:
    ldmxcsr.s:1: Error: no such 386 instruction: 'ldmxcsr'
>How-To-Repeat:
Data is a one line file called <anything.s> with the
      following line in it:-
   ldmxcsr -4(%ebp)
>Fix:
If you pass the same one line file through the AS program
directly, it assembles fine.
I had to assemble the program that used this instruction
with the -S option to stop after the Assembler creation
step.
Then I had to pass the output throught the AS Assembler to
create the output module.
I then had to <kluge> the Makefile to bypass assembling this
program.
>Release-Note:
>Audit-Trail:
>Unformatted: