Vector logf for x86_64 and tests.

Here is implementation of vectorized logf containing SSE, AVX,
AVX2 and AVX512 versions according to Vector ABI
<https://groups.google.com/forum/#!topic/x86-64-abi/LmppCfN1rZ4>.

    * sysdeps/unix/sysv/linux/x86_64/libmvec.abilist: New symbols added.
    * sysdeps/x86/fpu/bits/math-vector.h: Added SIMD declaration and asm
    redirections for logf.
    * sysdeps/x86_64/fpu/Makefile (libmvec-support): Added new files.
    * sysdeps/x86_64/fpu/Versions: New versions added.
    * sysdeps/x86_64/fpu/libm-test-ulps: Regenerated.
    * sysdeps/x86_64/fpu/multiarch/Makefile (libmvec-sysdep_routines): Added
    build of SSE, AVX2 and AVX512 IFUNC versions.
    * sysdeps/x86_64/fpu/multiarch/svml_s_logf16_core.S: New file.
    * sysdeps/x86_64/fpu/multiarch/svml_s_logf16_core_avx512.S: New file.
    * sysdeps/x86_64/fpu/multiarch/svml_s_logf4_core.S: New file.
    * sysdeps/x86_64/fpu/multiarch/svml_s_logf4_core_sse4.S: New file.
    * sysdeps/x86_64/fpu/multiarch/svml_s_logf8_core.S: New file.
    * sysdeps/x86_64/fpu/multiarch/svml_s_logf8_core_avx2.S: New file.
    * sysdeps/x86_64/fpu/svml_s_logf16_core.S: New file.
    * sysdeps/x86_64/fpu/svml_s_logf4_core.S: New file.
    * sysdeps/x86_64/fpu/svml_s_logf8_core.S: New file.
    * sysdeps/x86_64/fpu/svml_s_logf8_core_avx.S: New file.
    * sysdeps/x86_64/fpu/svml_s_logf_data.S: New file.
    * sysdeps/x86_64/fpu/svml_s_logf_data.h: New file.
    * sysdeps/x86_64/fpu/test-float-vlen16-wrappers.c: Vector logf tests.
    * sysdeps/x86_64/fpu/test-float-vlen16.c: Likewise.
    * sysdeps/x86_64/fpu/test-float-vlen4-wrappers.c: Likewise.
    * sysdeps/x86_64/fpu/test-float-vlen4.c: Likewise.
    * sysdeps/x86_64/fpu/test-float-vlen8-avx2-wrappers.c: Likewise.
    * sysdeps/x86_64/fpu/test-float-vlen8-avx2.c: Likewise.
    * sysdeps/x86_64/fpu/test-float-vlen8-wrappers.c: Likewise.
    * sysdeps/x86_64/fpu/test-float-vlen8.c: Likewise.
    * NEWS: Mention addition of x86_64 vector logf.

1 files changed, 102 insertions, 0 deletions

diff --git a/sysdeps/x86_64/fpu/svml_s_logf_data.S b/sysdeps/x86_64/fpu/svml_s_logf_data.S
new file mode 100644
index 0000000000..1e7f7015d3
--- /dev/null
+++ b/sysdeps/x86_64/fpu/svml_s_logf_data.S
@@ -0,0 +1,102 @@
+/* Data for vector function logf.
+   Copyright (C) 2014-2015 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/>.  */
+
+#include "svml_s_logf_data.h"
+
+	.section .rodata, "a"
+	.align 64
+
+/* Data table for vector implementations of function logf.
+   The table may contain polynomial, reduction, lookup coefficients and
+   other coefficients obtained through different methods of research and
+   experimental work.  */
+
+	.globl __svml_slog_data
+__svml_slog_data:
+
+/* Polynomial sPoly[] coefficients:
+ * -5.0000000000000000000000000e-01 */
+float_vector _sPoly_1 0xbf000000
+
+/* 3.3336564898490905761718750e-01 */
+float_vector _sPoly_2 0x3eaaaee7
+
+/* -2.5004664063453674316406250e-01 */
+float_vector _sPoly_3 0xbe80061d
+
+/* 1.9822503626346588134765625e-01 */
+float_vector _sPoly_4 0x3e4afb81
+
+/* -1.6462457180023193359375000e-01 */
+float_vector _sPoly_5 0xbe289358
+
+/* 1.6964881122112274169921875e-01 */
+float_vector _sPoly_6 0x3e2db86b
+
+/* -1.5177205204963684082031250e-01 */
+float_vector _sPoly_7 0xbe1b6a22
+
+/* Constant for work range check: Delta 80000000-7f800000 */
+float_vector _iHiDelta 0x00800000
+
+/* Constant for work range check: 00800000 + Delta */
+float_vector _iLoRange 0x01000000
+
+/* Mantissa break point  SP 2/3 */
+float_vector _iBrkValue 0x3f2aaaab
+
+/* SP significand mask */
+float_vector _iOffExpoMask 0x007fffff
+
+/* 1.0f */
+float_vector _sOne 0x3f800000
+
+/* SP log(2) */
+float_vector _sLn2 0x3f317218
+
+/* SP infinity, +/- */
+.if .-__svml_slog_data != _sInfs
+.err
+.endif
+	.long	0x7f800000
+	.long	0xff800000
+	.rept	56
+	.byte	0
+	.endr
+
+/* SP one, +/- */
+.if .-__svml_slog_data != _sOnes
+.err
+.endif
+	.long	0x3f800000
+	.long	0xbf800000
+	.rept	56
+	.byte	0
+	.endr
+
+/* SP zero +/- */
+.if .-__svml_slog_data != _sZeros
+.err
+.endif
+	.long	0x00000000
+	.long	0x80000000
+	.rept	56
+	.byte	0
+	.endr
+	.type	__svml_slog_data,@object
+	.size __svml_slog_data,.-__svml_slog_data