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A patch to use fclass for ia64.
- To: ia64-tools at napali dot hpl dot hp dot com
- Subject: A patch to use fclass for ia64.
- From: "H . J . Lu" <hjl at valinux dot com>
- Date: Fri, 8 Dec 2000 16:51:34 -0800
- Cc: GNU C Library <libc-alpha at sourceware dot cygnus dot com>
On Fri, Dec 08, 2000 at 04:05:43PM -0800, Richard Henderson wrote:
> On Fri, Dec 08, 2000 at 02:53:11PM -0800, H . J . Lu wrote:
> > Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127'
> > impliedf), specific resource number is 8
> [...]
> > (p7) fclass.m p7, p8 = farg0, @inf|@neg
> > (p6) br.ret.sptk.many rp
> > ;;
> > (p7) mov ret0 = -1
> > (p8) mov ret0 = 0
>
> The assembler isn't good enough to see that control only flows
> to the last two instructions when p7 is true, and thus p7/p8
> are mutex.
>
> I'd suggest just adding a .pred.rel.mutex note after the
> conditional return.
>
Thanks. It does the trick.
I am enclosing a patch to use the ia64 fclass intruction.
H.J.
----
2000-12-08 H.J. Lu <hjl@gnu.org>
* sysdeps/ia64/fpu/s_isinfl.S: Renamed to ...
* sysdeps/ia64/fpu/s_isinf.S: This.
Add a .pred.rel.mutex note to avoid false report.
* sysdeps/ia64/fpu/s_isnanl.S: Renamed to ...
* sysdeps/ia64/fpu/s_isnan.S: This.
* sysdeps/ia64/fpu/s_fpclassify.S: New.
* sysdeps/ia64/fpu/s_fpclassifyf.S: Likewise.
* sysdeps/ia64/fpu/s_fpclassifyl.S: Likewise.
* sysdeps/ia64/fpu/s_isinff.S: Likewise.
* sysdeps/ia64/fpu/s_isinfl.S: Likewise.
* sysdeps/ia64/fpu/s_isnanf.S: Likewise.
* sysdeps/ia64/fpu/s_isnanl.S: Likewise.
Index: sysdeps/ia64/fpu/s_isinfl.S
===================================================================
RCS file: /work/cvs/gnu/glibc/sysdeps/ia64/fpu/s_isinfl.S,v
retrieving revision 1.1.1.1
diff -u -p -r1.1.1.1 s_isinfl.S
--- sysdeps/ia64/fpu/s_isinfl.S 2000/11/07 01:29:42 1.1.1.1
+++ sysdeps/ia64/fpu/s_isinfl.S 2000/12/09 00:33:34
@@ -1,47 +1 @@
-/* Test for inf/-inf
- Copyright (C) 2000 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Jes Sorensen <jes@linuxcare.com>, October 2000.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-/*
- * isinfl(x) returns 1 if x is inf, -1 for x == -inf, else 0;
- */
-
-#include <sysdep.h>
-#undef ret
-
-ENTRY (__isinfl)
-{
-.mfi
- fclass.m p6, p7 = farg0, @inf|@pos
- ;;
-}
-{
-.mfb
-(p6) mov ret0 = 1
-(p7) fclass.m p7, p8 = farg0, @inf|@neg
-(p6) br.ret.sptk.many rp
- ;;
-}
-(p7) mov ret0 = -1
-(p8) mov ret0 = 0
- br.ret.sptk.many rp
-}
-END (__isinfl)
-
-weak_alias (__isinfl, isinfl)
+/* __isinfl is in s_isinf.S. */
Index: sysdeps/ia64/fpu/s_isnanl.S
===================================================================
RCS file: /work/cvs/gnu/glibc/sysdeps/ia64/fpu/s_isnanl.S,v
retrieving revision 1.1.1.1
diff -u -p -r1.1.1.1 s_isnanl.S
--- sysdeps/ia64/fpu/s_isnanl.S 2000/11/07 01:29:42 1.1.1.1
+++ sysdeps/ia64/fpu/s_isnanl.S 2000/12/09 00:34:20
@@ -1,42 +1 @@
-/* Test for NaN
- Copyright (C) 2000 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Jes Sorensen <jes@linuxcare.com>, October 2000.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-/*
- * isnanl(x) returns 1 is x is nan, else 0;
- */
-
-#include <sysdep.h>
-#undef ret
-
-ENTRY (__isnanl)
-{
-.mfi
- fclass.m p6, p7 = farg0, @nat | @qnan | @snan
- ;;
-}
-{
-.mib
-(p6) mov ret0 = 1
-(p7) mov ret0 = 0
- br.ret.sptk.many rp
-}
-END (__isnanl)
-
-weak_alias (__isnanl, isnanl)
+/* __isnanl is in s_isnan.S. */
--- /dev/null Thu Aug 24 02:00:32 2000
+++ sysdeps/ia64/fpu/s_isinf.S Fri Dec 8 16:46:30 2000
@@ -0,0 +1,54 @@
+/* Test for inf/-inf
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Jes Sorensen <jes@linuxcare.com>, October 2000.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/*
+ * isinf(x) returns 1 if x is inf, -1 for x == -inf, else 0;
+ */
+
+#include <sysdep.h>
+#undef ret
+
+ENTRY (__isinf)
+{
+.mfi
+ fclass.m p6, p7 = farg0, @inf|@pos
+ ;;
+}
+{
+.mfb
+(p6) mov ret0 = 1
+(p7) fclass.m p7, p8 = farg0, @inf|@neg
+(p6) br.ret.sptk.many rp
+ ;;
+}
+{
+ .pred.rel.mutex p7,p8
+(p7) mov ret0 = -1
+(p8) mov ret0 = 0
+ br.ret.sptk.many rp
+}
+END (__isinf)
+
+strong_alias (__isinf, __isinff)
+strong_alias (__isinf, __isinfl)
+
+weak_alias (__isinf, isinf)
+weak_alias (__isinff, isinff)
+weak_alias (__isinfl, isinfl)
--- /dev/null Thu Aug 24 02:00:32 2000
+++ sysdeps/ia64/fpu/s_isnan.S Fri Dec 8 16:33:02 2000
@@ -0,0 +1,47 @@
+/* Test for NaN
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Jes Sorensen <jes@linuxcare.com>, October 2000.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/*
+ * isnan(x) returns 1 is x is nan, else 0;
+ */
+
+#include <sysdep.h>
+#undef ret
+
+ENTRY (__isnan)
+{
+.mfi
+ fclass.m p6, p7 = farg0, @nat | @qnan | @snan
+ ;;
+}
+{
+.mib
+(p6) mov ret0 = 1
+(p7) mov ret0 = 0
+ br.ret.sptk.many rp
+}
+END (__isnan)
+
+strong_alias (__isnan, __isnanf)
+strong_alias (__isnan, __isnanl)
+
+weak_alias (__isnan, isnan)
+weak_alias (__isnanf, isnanf)
+weak_alias (__isnanl, isnanl)
--- /dev/null Thu Aug 24 02:00:32 2000
+++ sysdeps/ia64/fpu/s_fpclassify.S Fri Dec 8 16:36:45 2000
@@ -0,0 +1,59 @@
+/* Return classification value corresponding to argument.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <sysdep.h>
+#undef ret
+
+ENTRY (__fpclassify)
+{
+.mfi
+ fclass.m p6, p7 = farg0, @nat | @qnan | @snan
+ ;;
+}
+{
+.mfb
+(p6) mov ret0 = 0
+(p7) fclass.m p7, p8 = farg0, @inf
+(p6) br.ret.sptk.many rp
+ ;;
+}
+{
+.mfb
+(p7) mov ret0 = 1
+(p8) fclass.m p8, p6 = farg0, @zero
+(p7) br.ret.sptk.many rp
+ ;;
+}
+{
+.mfb
+(p8) mov ret0 = 2
+(p6) fclass.m p6, p7 = farg0, @unorm
+(p8) br.ret.sptk.many rp
+ ;;
+}
+{
+ .pred.rel.mutex p6, p7
+(p6) mov ret0 = 3
+(p7) mov ret0 = 4
+ br.ret.sptk.many rp
+}
+END (__fpclassify)
+
+strong_alias (__fpclassify, __fpclassifyf)
+strong_alias (__fpclassify, __fpclassifyl)
--- /dev/null Thu Aug 24 02:00:32 2000
+++ sysdeps/ia64/fpu/s_fpclassifyf.S Fri Dec 8 15:00:22 2000
@@ -0,0 +1 @@
+/* __fpclassifyf is in s_fpclassify.S. */
--- /dev/null Thu Aug 24 02:00:32 2000
+++ sysdeps/ia64/fpu/s_fpclassifyl.S Fri Dec 8 15:00:11 2000
@@ -0,0 +1 @@
+/* __fpclassifyl is in s_fpclassify.S. */
--- /dev/null Thu Aug 24 02:00:32 2000
+++ sysdeps/ia64/fpu/s_isinff.S Fri Dec 8 16:33:58 2000
@@ -0,0 +1 @@
+/* __isinff is in s_isinf.S. */
--- /dev/null Thu Aug 24 02:00:32 2000
+++ sysdeps/ia64/fpu/s_isnanf.S Fri Dec 8 16:34:30 2000
@@ -0,0 +1 @@
+/* __isnanf is in s_isnan.S. */