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[Bug gas/336] gas cannot assemble pdtlb,l instruction
From: |
nickc at redhat dot com |
Subject: |
[Bug gas/336] gas cannot assemble pdtlb,l instruction |
Date: |
27 Aug 2004 16:24:14 -0000 |
------- Additional Comments From nickc at redhat dot com 2004-08-27 16:24
-------
Subject: Re: gas cannot assemble pdtlb,l instruction
Hi Randolph,
> foo:
> pdtlb,l 0(%r28)
I do not believe that this instruction is valid. The "x" field of the
instruction needs to be a register name.
According to the "PA-RISC 2.0 Architecture" document, chapter 7, page
7-106 the format for the instruction is:
PDTLB,scope,cmplt x(s,b)
And the operation is defined as:
if (priv != 0)
privileged_operation_trap;
else {
space space_select(s,GR[b],INDEXED);
switch (cmplt) {
case M: offset GR[b];
GR[b] GR[b] + GR[x];
break;
default: offset GR[b] + GR[x];
break;
}
page_size 4096 << (2 * GR[b]{60..63});
for (i 0; i < page_size/4096; i++) {
if (entry DTLB_search(space, offset + i*4096))
DTLB_purge_local(entry);
}
if (scope != L)
DTLB_purge_broadcast(space,offset,page_size);
}
Note how GR[x] is used regardless of the value of "cmplt".
The tests in the GAS testsuite also make this clear. The following
instructions are all valid:
pdtlb %r4(%sr0,%r5)
pdtlb,m %r4(%sr0,%r5)
pdtlb,l %r4(%sr0,%r5)
pdtlb,l,m %r4(%sr0,%r5)
pitlb,l %r4(%sr4,%r5)
pitlb,l,m %r4(%sr4,%r5)
Cheers
Nick
--
http://sources.redhat.com/bugzilla/show_bug.cgi?id=336
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- [Bug gas/336] New: gas cannot assemble pdtlb,l instruction, tausq at debian dot org, 2004/08/17
- [Bug gas/336] gas cannot assemble pdtlb,l instruction, nickc at redhat dot com, 2004/08/27
- [Bug gas/336] gas cannot assemble pdtlb,l instruction, randolph at tausq dot org, 2004/08/27
- [Bug gas/336] gas cannot assemble pdtlb,l instruction,
nickc at redhat dot com <=
- [Bug gas/336] gas cannot assemble pdtlb,l instruction, randolph at tausq dot org, 2004/08/27
- [Bug gas/336] gas cannot assemble pdtlb,l instruction, randolph at tausq dot org, 2004/08/27
- [Bug gas/336] gas cannot assemble pdtlb,l instruction, nickc at redhat dot com, 2004/08/31