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authorGeoff Keating <geoffk@cygnus.com>2000-03-04 03:36:14 +0000
committerGeoff Keating <geoffk@cygnus.com>2000-03-04 03:36:14 +0000
commit8ed1e7d5894000c155acbd06ffd2ba07ea9f718b (patch)
treeb9555e693953f12cd6a0a4f533922db17513d8b0 /soft-fp/sysdeps/powerpc/q_util.c
parent706546ff10e0979cf49d002c03334810663b655f (diff)
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In libc/:
* configure.in: Compute sizeof-long-double. * configure: Regenerated. * config.make.in: Make sizeof-long-double available to sub-makes. In libc/soft-fp/: * soft-fp.h (_FP_ROUND_ZERO): Cast 0 to void before using it as a statement. * sysdeps/powerpc/Makefile (routines): New file. * sysdeps/powerpc/q_*: New files. 2000-03-03 Geoff Keating <geoffk@cygnus.com> * configure.in: Compute sizeof-long-double. * configure: Regenerated. * config.make.in: Make sizeof-long-double available to sub-makes.
Diffstat (limited to 'soft-fp/sysdeps/powerpc/q_util.c')
-rw-r--r--soft-fp/sysdeps/powerpc/q_util.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/soft-fp/sysdeps/powerpc/q_util.c b/soft-fp/sysdeps/powerpc/q_util.c
new file mode 100644
index 0000000000..d46cbd826a
--- /dev/null
+++ b/soft-fp/sysdeps/powerpc/q_util.c
@@ -0,0 +1,57 @@
+/* Software floating-point emulation.
+ Helper routine for _q_* routines.
+ Simulate exceptions using double arithmetics.
+ Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Jakub Jelinek (jj@ultra.linux.cz).
+
+ 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 "soft-fp.h"
+
+unsigned long long ___q_numbers [] = {
+0x0000000000000000ULL, /* Zero */
+0x0010100000000000ULL, /* Very tiny number */
+0x0010000000000000ULL, /* Minimum normalized number */
+0x7fef000000000000ULL, /* A huge double number */
+};
+
+double ___q_simulate_exceptions(int exceptions)
+{
+ double d, *p = (double *)___q_numbers;
+ if (exceptions & FP_EX_INVALID)
+ d = p[0]/p[0];
+ if (exceptions & FP_EX_OVERFLOW)
+ {
+ d = p[3] + p[3];
+ exceptions &= ~FP_EX_INEXACT;
+ }
+ if (exceptions & FP_EX_UNDERFLOW)
+ {
+ if (exceptions & FP_EX_INEXACT)
+ {
+ d = p[2] * p[2];
+ exceptions &= ~FP_EX_INEXACT;
+ }
+ else
+ d = p[1] - p[2];
+ }
+ if (exceptions & FP_EX_DIVZERO)
+ d = 1.0/p[0];
+ if (exceptions & FP_EX_INEXACT)
+ d = p[3] - p[2];
+ return d;
+}