about summary refs log tree commit diff
path: root/sysdeps/s390
diff options
context:
space:
mode:
authorJakub Jelinek <jakub@redhat.com>2010-10-13 22:27:03 -0400
committerUlrich Drepper <drepper@gmail.com>2010-10-13 22:27:03 -0400
commit5e908464b9603e9cd95047d2edd00de5f78fedaf (patch)
tree1f526248f31bee031ce4c92d9b1b2e857d6b671b /sysdeps/s390
parentf90681487d90a6eea8f1c60021bc8dd83313c59b (diff)
downloadglibc-5e908464b9603e9cd95047d2edd00de5f78fedaf.tar.gz
glibc-5e908464b9603e9cd95047d2edd00de5f78fedaf.tar.xz
glibc-5e908464b9603e9cd95047d2edd00de5f78fedaf.zip
Implement accurate fma.
Diffstat (limited to 'sysdeps/s390')
-rw-r--r--sysdeps/s390/fpu/s_fma.c37
-rw-r--r--sysdeps/s390/fpu/s_fmaf.c32
2 files changed, 69 insertions, 0 deletions
diff --git a/sysdeps/s390/fpu/s_fma.c b/sysdeps/s390/fpu/s_fma.c
new file mode 100644
index 0000000000..f682362313
--- /dev/null
+++ b/sysdeps/s390/fpu/s_fma.c
@@ -0,0 +1,37 @@
+/* Compute x * y + z as ternary operation.  S/390 version.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2010.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <math.h>
+
+double
+__fma (double x, double y, double z)
+{
+  double r;
+  asm ("madbr %0,%1,%2" : "=f" (r) : "%f" (x), "fR" (y), "0" (z));
+  return r;
+}
+#ifndef __fma
+weak_alias (__fma, fma)
+#endif
+
+#ifdef NO_LONG_DOUBLE
+strong_alias (__fma, __fmal)
+weak_alias (__fmal, fmal)
+#endif
diff --git a/sysdeps/s390/fpu/s_fmaf.c b/sysdeps/s390/fpu/s_fmaf.c
new file mode 100644
index 0000000000..030d7b229b
--- /dev/null
+++ b/sysdeps/s390/fpu/s_fmaf.c
@@ -0,0 +1,32 @@
+/* Compute x * y + z as ternary operation.  S/390 version.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2010.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <math.h>
+
+float
+__fmaf (float x, float y, float z)
+{
+  float r;
+  asm ("maebr %0,%1,%2" : "=f" (r) : "%f" (x), "fR" (y), "0" (z));
+  return r;
+}
+#ifndef __fmaf
+weak_alias (__fmaf, fmaf)
+#endif