[PATCH 8/N v2] [x86_64] Vectorized math functions

[Andrew Senkevich <andrew dot n dot senkevich at gmail dot com>]

This patch adds libmvec.so build and ABI check on x86_64 by default,
exclude from build
with --disable-mathvec configure option.

2014-12-02  Andrew Senkevich  <andrew.n.senkevich@gmail.com>

        * math/bits/mathcalls.h: Added cos declaration with __MATHCALL_VEC.
        * sysdeps/x86/fpu/bits/math-vector.h: Added SIMD declaration for cos.
        * sysdeps/x86_64/configure: Regenerated.
        * sysdeps/x86_64/configure.ac: Options for libmvec build.
        * sysdeps/unix/sysv/linux/x86_64/libmvec.abilist: New file.
        * sysdeps/x86_64/fpu/Makefile: New file.

diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h
index 8a94a7e..82928a1 100644
--- a/math/bits/mathcalls.h
+++ b/math/bits/mathcalls.h
@@ -60,7 +60,7 @@ __MATHCALL (atan,, (_Mdouble_ __x));
 __MATHCALL (atan2,, (_Mdouble_ __y, _Mdouble_ __x));

 /* Cosine of X.  */
-__MATHCALL (cos,, (_Mdouble_ __x));
+__MATHCALL_VEC (cos,, (_Mdouble_ __x));
 /* Sine of X.  */
 __MATHCALL (sin,, (_Mdouble_ __x));
 /* Tangent of X.  */
diff --git a/sysdeps/unix/sysv/linux/x86_64/libmvec.abilist
b/sysdeps/unix/sysv/linux/x86_64/libmvec.abilist
new file mode 100644
index 0000000..b984207
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/libmvec.abilist
@@ -0,0 +1,5 @@
+GLIBC_2.21
+ GLIBC_2.21 A
+ _ZGVbN2v_cos F
+ _ZGVcN4v_cos F
+ _ZGVdN4v_cos F
diff --git a/sysdeps/x86/fpu/bits/math-vector.h
b/sysdeps/x86/fpu/bits/math-vector.h
new file mode 100644
index 0000000..98f414d
--- /dev/null
+++ b/sysdeps/x86/fpu/bits/math-vector.h
@@ -0,0 +1,37 @@
+/* Platform-specific SIMD declarations of math functions.
+   Copyright (C) 2014 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 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _MATH_H
+# error "Never include <bits/math-vector.h> directly; \
+ include <math.h> instead."
+#endif
+
+/* Get default empty definitions for simd declarations. */
+#include <bits/libm-simd-decl-stubs.h>
+
+#if defined __x86_64__ && defined __FAST_MATH__
+# if defined _OPENMP && _OPENMP >= 201307
+/* OpenMP case. */
+/* TODO Put here link to document about pragma meaning. */
+#  define __DECL_SIMD_VLEN2_SSE4 _Pragma ("omp declare simd
notinbranch simdlen(2)")
+#  define __DECL_SIMD_VLEN4_AVX _Pragma ("omp declare simd
notinbranch simdlen(4)")
+#  define __DECL_SIMD_VLEN4_AVX2 _Pragma ("omp declare simd
notinbranch simdlen(4)")
+#  undef __DECL_SIMD_cos
+#  define __DECL_SIMD_cos __DECL_SIMD_VLEN2_SSE4 __DECL_SIMD_VLEN4_AVX2
+# endif
+#endif
diff --git a/sysdeps/x86_64/configure b/sysdeps/x86_64/configure
index 7d4dadd..1493523 100644
--- a/sysdeps/x86_64/configure
+++ b/sysdeps/x86_64/configure
@@ -275,6 +275,10 @@ fi
 config_vars="$config_vars
 config-cflags-avx2 = $libc_cv_cc_avx2"

+if test x"$build_mathvec" = xnotset; then
+  build_mathvec=yes
+fi
+
 $as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h

 # work around problem with autoconf and empty lines at the end of files
diff --git a/sysdeps/x86_64/configure.ac b/sysdeps/x86_64/configure.ac
index c9f9a51..1c2b35f 100644
--- a/sysdeps/x86_64/configure.ac
+++ b/sysdeps/x86_64/configure.ac
@@ -99,6 +99,10 @@ if test $libc_cv_cc_avx2 = yes; then
 fi
 LIBC_CONFIG_VAR([config-cflags-avx2], [$libc_cv_cc_avx2])

+if test x"$build_mathvec" = xnotset; then
+  build_mathvec=yes
+fi
+
 dnl It is always possible to access static and hidden symbols in an
 dnl position independent way.
 AC_DEFINE(PI_STATIC_AND_HIDDEN)
diff --git a/sysdeps/x86_64/fpu/Makefile b/sysdeps/x86_64/fpu/Makefile
new file mode 100644
index 0000000..25fe0d4
--- /dev/null
+++ b/sysdeps/x86_64/fpu/Makefile
@@ -0,0 +1,4 @@
+ifeq ($(subdir),mathvec)
+libmvec-support += svml_d_cos2_core svml_d_cos4_core_avx \
+   svml_d_cos4_core_avx2 svml_d_cos_data
+endif



--
WBR,
Andrew

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