#3414 format bugs on P4's and AMD64's

[Brian]

Trying to do some basic calculations with expr and
format is barfing on the first run and working on
subsequent on a P4:
tcl>set prefix 0x03000000
tcl>set mask 0xff000000
tcl>set j [expr $prefix | ~$mask+1]
tcl>set last [format 0x%08x $j]
Error:
tcl>set last [format 0x%08x $j]
tcl>set last [format 0x%08x $j]
tcl>set last [format 0x%08x $j]

This is on an AMD64:
tcl>set prefix 0x03000000
tcl>set mask 0xff000000
tcl>set j [expr $prefix | ~$mask+1]
tcl>set last [format 0x%08x $j]
tcl>puts $last
0xffffffff03000000

This is on a P3
tcl>set prefix 0x03000000
tcl>set mask 0xff000000
tcl>set j [expr $prefix | ~$mask+1]
tcl>set last [format 0x%08x $j]
Error:
tcl>set last [format 0x%08x $j]
tcl>puts $last
0x03000000

This is with default redhat packages.

[Jeffrey Hobbs]

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What version of Tcl was this with? I cannot repro the
problem on AMD64 and P4 using SuSE 9.2 on both, either in
8.4 or 8.5.

[Brian]

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This is on FC3 with tcl-8.4.7-2

[Jeffrey Hobbs]

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Please retest with the head (8.4.13) or you can grab
ActiveTcl 8.4.12 at http://www.activestate.com/ for a quick
test.

[Don Porter]

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It's a bit difficult to
follow the original report
(some pasting errors?), but it
looks like the issue is whether

0x03000000

or

0xffffffff03000000

is the correct result of

[format 0x%08x -4244635648]

?

The answer is that the correct
result is platform-dependent
and varies depending on the value
of ::tcl_platform(wordSize), I think.

Which result do you want your script
to produce portably?

[SourceForge Robot]

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