Date: Mon, 22 Oct 2001 16:36:12 -0700 From: Peter Wemm <peter@wemm.org> To: Doug Rabson <dfr@nlsystems.com> Cc: Marcel Moolenaar <marcel@xcllnt.net>, ia64@FreeBSD.ORG Subject: Re: Hazards [was: Re: cvs commit: src/sys/ia64/ia64 sal.c] Message-ID: <20011022233613.038A93808@overcee.netplex.com.au> In-Reply-To: <Pine.BSF.4.33.0110221400310.76250-100000@herring.nlsystems.com>
index | next in thread | previous in thread | raw e-mail
as (2.9 and 2.11.2) report:
pmap.s:1230: Warning: Use of 'ld8' violates RAW dependency 'DTC' (data)
pmap.s:1230: Warning: Only the first path encountering the conflict is reported
pmap.s:1213: Warning: This is the location of the conflicting usage
pmap.s:3463: Warning: Use of 'ld8' violates RAW dependency 'DTC' (data)
pmap.s:3463: Warning: Only the first path encountering the conflict is reported
pmap.s:3457: Warning: This is the location of the conflicting usage
pmap.s:3467: Warning: Use of 'st8' violates RAW dependency 'DTC' (data)
pmap.s:3467: Warning: Only the first path encountering the conflict is reported
pmap.s:3457: Warning: This is the location of the conflicting usage
.LBB17:
.loc 0 208 0
#APP
ptc.e r16;; // 1213
#NO_APP
;;
.loc 0 209 0
.LBE17:
.file 0 "../../../ia64/ia64/pmap.c"
.loc 0 508 0
add r16 = r16, r18
.loc 0 506 0
adds r14 = 1, r15
;;
sxt4 r15 = r14
;;
cmp.gtu p6, p7 = r17, r15
(p6) br.cond.dptk .L635
.L641:
.loc 0 510 0
ld8 r14 = [r23] // 1230
;;
....
.LBB93:
.loc 0 235 0
#APP
ptc.l r35,r14;; // 3457
#NO_APP
.loc 0 236 0
.LBE93:
.file 0 "../../../ia64/ia64/pmap.c"
.loc 0 1192 0
ld8 r14 = [r34] // 3463
;;
and r14 = -2, r14
;;
st8 [r34] = r14 // 3467
.loc 0 1193 0
.L847:
;;
This corresponds to the code:
for (j = 0; j < pmap_ptc_e_count2; j++) {
ia64_ptc_e(addr);
addr += pmap_ptc_e_stride2; // 1230
^^^^^^
}
addr += pmap_ptc_e_stride1;
and:
static void
pmap_clear_pte(struct ia64_lpte *pte, vm_offset_t va)
{
if (pte->pte_p) {
pmap_remove_vhpt(va);
ia64_ptc_l(va, PAGE_SHIFT << 2);
pte->pte_p = 0; // 3463/3467
^^^^^^^^^^^^^^^
}
}
I haven't finished looking for the info about this.. Is this real?
It seems that gas is complaining about an instruction that it thinks
should be there but is missing.
Cheers,
-Peter
--
Peter Wemm - peter@FreeBSD.org; peter@yahoo-inc.com; peter@netplex.com.au
"All of this is for nothing if we don't go to the stars" - JMS/B5
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-ia64" in the body of the message
help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20011022233613.038A93808>