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authorUlrich Drepper <drepper@redhat.com>1999-12-29 18:11:48 +0000
committerUlrich Drepper <drepper@redhat.com>1999-12-29 18:11:48 +0000
commitd876f5327985eac3bf3109e9429febc8a8954ff5 (patch)
tree2ab0233054876a59507ff2ef9652ef81b1317991 /soft-fp/subdf3.c
parentdbbbaf53352501384c57512e2251c9d7169388af (diff)
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Update.
1999-12-29 Ulrich Drepper <drepper@cygnus.com> * soft-fp/*: Tons of new files to implement floating-point arithmetic in software. Contributed by Richard Henderson, Jakub Jelinek and others.
Diffstat (limited to 'soft-fp/subdf3.c')
-rw-r--r--soft-fp/subdf3.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/soft-fp/subdf3.c b/soft-fp/subdf3.c
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+/* Software floating-point emulation.
+ Return a - b
+ Copyright (C) 1997,1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Richard Henderson (rth@cygnus.com) and
+ 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"
+#include "double.h"
+
+double __subdf3(double a, double b)
+{
+ FP_DECL_EX;
+ FP_DECL_D(A); FP_DECL_D(B); FP_DECL_D(R);
+ double r;
+
+ FP_INIT_ROUNDMODE;
+ FP_UNPACK_D(A, a);
+ FP_UNPACK_D(B, b);
+ FP_SUB_D(R, A, B);
+ FP_PACK_D(r, R);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}