Hello!
Similar to x86, this patch puts soft-FP exception handler out-of-line.
The patch also cleans asm constraints a bit (introduces "+"), but has
no other functional changes.
2012-06-12 Uros Bizjak <ubiz...@gmail.com>
* config/ia64/sfp-machine.h (__sfp_handle_exceptions): New
function declaration.
(FP_EX_MASK): New.
(FP_HANDLE_EXCEPTIONS): Use __sfp_handle_exceptions.
* config/ia64/sfp-exceptions.c: New.
* config/ia64/t-softfp (LIB2ADD): Add sfp-exceptions.c.
The patch is only compile tested, needs someone to regression test it ...
Uros.
Index: config/ia64/sfp-exceptions.c
===================================================================
--- config/ia64/sfp-exceptions.c (revision 0)
+++ config/ia64/sfp-exceptions.c (revision 0)
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2012 Free Software Foundation, Inc.
+ *
+ * This file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 3, or (at your option) any
+ * later version.
+ *
+ * This file 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
+ * General Public License for more details.
+ *
+ * Under Section 7 of GPL version 3, you are granted additional
+ * permissions described in the GCC Runtime Library Exception, version
+ * 3.1, as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License and
+ * a copy of the GCC Runtime Library Exception along with this program;
+ * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include "sfp-machine.h"
+
+void
+__sfp_handle_exceptions (int _fex)
+{
+ double d;
+
+ if (_fex & FP_EX_INVALID)
+ {
+ asm volatile ("frcpa.s0 %0,p1=f0,f0" : "=f" (d) : : "p1");
+ }
+ if (_fex & FP_EX_DIVZERO)
+ {
+ asm volatile ("frcpa.s0 %0,p1=f1,f0" : "=f" (d) : : "p1");
+ }
+ if (_fex & FP_EX_OVERFLOW)
+ {
+ d = __DBL_MAX__;
+ asm volatile ("fadd.d.s0 %0=%0,%0" : "+f" (d));
+ }
+ if (_fex & FP_EX_UNDERFLOW)
+ {
+ d = __DBL_MIN__;
+ asm volatile ("fnma.d.s0 %0=%0,%0,f0" : "+f" (d));
+ }
+ if (_fex & FP_EX_INEXACT)
+ {
+ d = __DBL_MAX__;
+ asm volatile ("fsub.d.s0 %0=%0,f1" : "+f" (d));
+ }
+}
Index: config/ia64/t-softfp
===================================================================
--- config/ia64/t-softfp (revision 188431)
+++ config/ia64/t-softfp (working copy)
@@ -1,2 +1,4 @@
# Provide fallbacks for __builtin_copysignq and __builtin_fabsq.
LIB2ADD += $(srcdir)/config/ia64/tf-signs.c
+
+LIB2ADD += $(srcdir)/config/ia64/sfp-exceptions.c
Index: config/ia64/sfp-machine.h
===================================================================
--- config/ia64/sfp-machine.h (revision 188431)
+++ config/ia64/sfp-machine.h (working copy)
@@ -55,40 +55,16 @@
#define FP_EX_UNDERFLOW 0x10
#define FP_EX_INEXACT 0x20
-#define FP_HANDLE_EXCEPTIONS \
- do { \
- double tmp, dummy; \
- if (_fex & FP_EX_INVALID) \
- {
\
- tmp = 0.0; \
- __asm__ __volatile__ ("frcpa.s0 %0,p1=f0,f0" \
- : "=f" (tmp) : : "p1" ); \
- }
\
- if (_fex & FP_EX_DIVZERO) \
- {
\
- __asm__ __volatile__ ("frcpa.s0 %0,p1=f1,f0" \
- : "=f" (tmp) : : "p1" ); \
- }
\
- if (_fex & FP_EX_OVERFLOW) \
- {
\
- dummy = __DBL_MAX__; \
- __asm__ __volatile__ ("fadd.d.s0 %0=%1,%1" \
- : "=f" (dummy) : "0" (dummy)); \
- }
\
- if (_fex & FP_EX_UNDERFLOW)
\
- {
\
- dummy = __DBL_MIN__; \
- __asm__ __volatile__ ("fnma.d.s0 %0=%1,%1,f0" \
- : "=f" (tmp) : "f" (dummy)); \
- }
\
- if (_fex & FP_EX_INEXACT) \
- {
\
- dummy = __DBL_MAX__; \
- __asm__ __volatile__ ("fsub.d.s0 %0=%1,f1" \
- : "=f" (dummy) : "0" (dummy)); \
- }
\
- } while (0)
+#define FP_EX_MASK 0x3f
+void __sfp_handle_exceptions (int);
+
+#define FP_HANDLE_EXCEPTIONS \
+ do { \
+ if (_fex & FP_EX_MASK) \
+ __sfp_handle_exceptions (_fex); \
+ } while (0);
+
#define FP_RND_NEAREST 0
#define FP_RND_ZERO 0xc00L
#define FP_RND_PINF 0x800L
