jdp@uunet.uu.net (John Polstra) (01/27/90)
Can anybody tell me how to turn off Sun's peephole optimizer "c2" for just
a portion of a program? From using strings(1), I have reason to believe
that it can be done using a directive something like this:
|#OPTIM# something
in the assembly language source. But I cannot guess the details and I
cannot find any documentation.
Here is my specific problem (SunOS 4.0.1 on a 3/180): I want to use
inline(1) to replace calls to a function by some assembly code for the
FPA. The assembly code that I want to use contains this instruction:
fpdot3d fpa0,fpa3,fpa0
The instruction uses six FPA registers, fpa0 thru fpa5. But "c2"
apparently thinks that the instruction uses only fpa0 and fpa3. As a
result, it is incorrectly rearranging some instructions and introducing a
bug. I want to be able to tell "c2" not to mess with a certain portion of
the code, so that I can work around this problem.
Thanks in advance . . .
John Polstra jdp@polstra.UUCP
Polstra & Co., Inc. ...{uunet,sun}!practic!polstra!jdp
Seattle, WA (206) 932-6482csmoko@relay.nswc.navy.mil (Chuck Smoko - E41) (01/28/90)
Has anyone been able copy SUNOS 1/4" distribution tapes using the public
domain copytape program? The SUNOS tcopy(1) does not lend itself to my
situation because I have only one drive per machine. When I compile and
run copytape using SUNOS 4, it does not go past the first file on the
tape. Using SUNOS 3.5, I run copytape regularly on all 1/2" tapes and on
SUNOS 3.5 1/4" distribution tapes. I guess SUNOS 4 1/4" tapes have a
strange blocking factor that may be greater than 126. My question is:
Does anyone have a copytape that has been modified to run under SUNOS 4?
I got the one that I am using a while ago on simtel20. Pointers on how to
copy the SUNOS 4 1/4" tapes using a 3.5 system are also welcome. If I get
enough responses, I will summarize.
Chuck Smoko
csmoko@relay.nswc.navy.mil
Naval Surface Warfare Ctr.
ps: I have read the sun-spots archives on copying SUNOS tapes. I,
however, did not notice any articles that discuss a particular
method in detail.