1 files changed, 136 insertions, 0 deletions
diff --git a/sysdeps/ieee754/dbl-64/math_config.h b/sysdeps/ieee754/dbl-64/math_config.h
new file mode 100644
index 0000000000..02d94fed3e
--- /dev/null
+++ b/sysdeps/ieee754/dbl-64/math_config.h
@@ -0,0 +1,136 @@
+/* Configuration for double precision math routines.
+   Copyright (C) 2018 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_CONFIG_H
+#define _MATH_CONFIG_H
+
+#include <math.h>
+#include <math_private.h>
+#include <stdint.h>
+
+#ifndef WANT_ROUNDING
+/* Correct special case results in non-nearest rounding modes.  */
+# define WANT_ROUNDING 1
+#endif
+#ifndef WANT_ERRNO
+/* Set errno according to ISO C with (math_errhandling & MATH_ERRNO) != 0.  */
+# define WANT_ERRNO 1
+#endif
+#ifndef WANT_ERRNO_UFLOW
+/* Set errno to ERANGE if result underflows to 0 (in all rounding modes).  */
+# define WANT_ERRNO_UFLOW (WANT_ROUNDING && WANT_ERRNO)
+#endif
+
+#ifndef TOINT_INTRINSICS
+/* When set, the roundtoint and converttoint functions are provided with
+   the semantics documented below.  */
+# define TOINT_INTRINSICS 0
+#endif
+
+#if TOINT_INTRINSICS
+/* Round x to nearest int in all rounding modes, ties have to be rounded
+   consistently with converttoint so the results match.  If the result
+   would be outside of [-2^31, 2^31-1] then the semantics is unspecified.  */
+static inline double_t
+roundtoint (double_t x);
+
+/* Convert x to nearest int in all rounding modes, ties have to be rounded
+   consistently with roundtoint.  If the result is not representible in an
+   int32_t then the semantics is unspecified.  */
+static inline int32_t
+converttoint (double_t x);
+#endif
+
+static inline uint64_t
+asuint64 (double f)
+{
+  union
+  {
+    double f;
+    uint64_t i;
+  } u = {f};
+  return u.i;
+}
+
+static inline double
+asdouble (uint64_t i)
+{
+  union
+  {
+    uint64_t i;
+    double f;
+  } u = {i};
+  return u.f;
+}
+
+#define NOINLINE __attribute__ ((noinline))
+
+/* Error handling tail calls for special cases, with a sign argument.
+   The sign of the return value is set if the argument is non-zero.  */
+
+/* The result overflows.  */
+attribute_hidden double __math_oflow (uint32_t);
+/* The result underflows to 0 in nearest rounding mode.  */
+attribute_hidden double __math_uflow (uint32_t);
+/* The result underflows to 0 in some directed rounding mode only.  */
+attribute_hidden double __math_may_uflow (uint32_t);
+/* Division by zero.  */
+attribute_hidden double __math_divzero (uint32_t);
+
+/* Error handling using input checking.  */
+
+/* Invalid input unless it is a quiet NaN.  */
+attribute_hidden double __math_invalid (double);
+
+/* Error handling using output checking, only for errno setting.  */
+
+/* Check if the result overflowed to infinity.  */
+attribute_hidden double __math_check_oflow (double);
+/* Check if the result underflowed to 0.  */
+attribute_hidden double __math_check_uflow (double);
+
+/* Check if the result overflowed to infinity.  */
+static inline double
+check_oflow (double x)
+{
+  return WANT_ERRNO ? __math_check_oflow (x) : x;
+}
+
+/* Check if the result underflowed to 0.  */
+static inline double
+check_uflow (double x)
+{
+  return WANT_ERRNO ? __math_check_uflow (x) : x;
+}
+
+#define EXP_TABLE_BITS 7
+#define EXP_POLY_ORDER 5
+#define EXP2_POLY_ORDER 5
+extern const struct exp_data
+{
+  double invln2N;
+  double shift;
+  double negln2hiN;
+  double negln2loN;
+  double poly[4]; /* Last four coefficients.  */
+  double exp2_shift;
+  double exp2_poly[EXP2_POLY_ORDER];
+  uint64_t tab[2*(1 << EXP_TABLE_BITS)];
+} __exp_data attribute_hidden;
+
+#endif