This is the mail archive of the
binutils@sourceware.cygnus.com
mailing list for the binutils project.
** potential patch for 2.10 ** DEC Alpha bug related to AT register
- To: GNU Binutils mailing list <binutils at sourceware dot cygnus dot com>
- Subject: ** potential patch for 2.10 ** DEC Alpha bug related to AT register
- From: "David O'Brien" <obrien at NUXI dot com>
- Date: Tue, 6 Jun 2000 09:27:06 -0700
- Organization: The NUXI BSD group
- Reply-To: obrien at NUXI dot com
The FreeBSD kernel has found a bug in 2.10 CVS from 20000512. This is
not fixed in 2.10 RC 2. The bug is a very annoying and misleading
warning that the use of floating point register 28 needs ".set noat" set.
Note that $r28 is $at, not $f28. The misleading warning may cause
programmers to wrap access to $f28 when they shouldn't.
May I check the following patch into both the 2.10 branch and HEAD?
Index: contrib/binutils/gas/config/tc-alpha.c
===================================================================
RCS file: /home/ncvs/src/contrib/binutils/gas/config/tc-alpha.c,v
retrieving revision 1.1.1.3
diff -u -r1.1.1.3 tc-alpha.c
--- contrib/binutils/gas/config/tc-alpha.c 2000/05/12 23:14:56 1.1.1.3
+++ contrib/binutils/gas/config/tc-alpha.c 2000/06/06 15:54:49
@@ -1372,7 +1372,7 @@
else
break;
- if (!alpha_noat_on && num == AXP_REG_AT)
+ if (!alpha_noat_on && (num + is_float) == AXP_REG_AT)
as_warn(_("Used $at without \".set noat\""));
return alpha_register_table[num + is_float];
Alternate fix is "if (!alpha_noat_on && num == AXP_REG_AT && !is_float)".