[PATCH v2 08/15] RISC-V: RV32D, RV64F, and RV64D Support

[Palmer Dabbelt <palmer at dabbelt dot com>]

This patch adds support for the various other hardware floating point
configurations that RISC-V supports.  This is split from the RV32F patch
to avoid mailing list size restrictions.
---
 sysdeps/riscv/rv32/rvd/s_lrint.c     | 30 ++++++++++++++++++++
 sysdeps/riscv/rv32/rvd/s_lround.c    | 30 ++++++++++++++++++++
 sysdeps/riscv/rv32/rvf/s_llrintf.c   | 30 ++++++++++++++++++++
 sysdeps/riscv/rv32/rvf/s_lrintf.c    | 30 ++++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_ceil.c      | 51 ++++++++++++++++++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_floor.c     | 51 ++++++++++++++++++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_llrint.c    | 29 +++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_llround.c   | 29 +++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_lrint.c     | 29 +++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_lround.c    | 29 +++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_nearbyint.c | 51 ++++++++++++++++++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_rint.c      | 51 ++++++++++++++++++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_round.c     | 51 ++++++++++++++++++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_roundeven.c | 54 ++++++++++++++++++++++++++++++++++++
 sysdeps/riscv/rv64/rvd/s_trunc.c     | 51 ++++++++++++++++++++++++++++++++++
 sysdeps/riscv/rv64/rvf/s_llrintf.c   | 30 ++++++++++++++++++++
 sysdeps/riscv/rv64/rvf/s_llroundf.c  | 30 ++++++++++++++++++++
 sysdeps/riscv/rv64/rvf/s_lrintf.c    | 30 ++++++++++++++++++++
 sysdeps/riscv/rvd/e_sqrt.c           | 27 ++++++++++++++++++
 sysdeps/riscv/rvd/s_copysign.c       | 28 +++++++++++++++++++
 sysdeps/riscv/rvd/s_finite.c         | 28 +++++++++++++++++++
 sysdeps/riscv/rvd/s_fma.c            | 30 ++++++++++++++++++++
 sysdeps/riscv/rvd/s_fmax.c           | 28 +++++++++++++++++++
 sysdeps/riscv/rvd/s_fmin.c           | 28 +++++++++++++++++++
 sysdeps/riscv/rvd/s_fpclassify.c     | 36 ++++++++++++++++++++++++
 sysdeps/riscv/rvd/s_isinf.c          | 29 +++++++++++++++++++
 sysdeps/riscv/rvd/s_isnan.c          | 28 +++++++++++++++++++
 sysdeps/riscv/rvd/s_issignaling.c    | 27 ++++++++++++++++++
 28 files changed, 975 insertions(+)
 create mode 100644 sysdeps/riscv/rv32/rvd/s_lrint.c
 create mode 100644 sysdeps/riscv/rv32/rvd/s_lround.c
 create mode 100644 sysdeps/riscv/rv32/rvf/s_llrintf.c
 create mode 100644 sysdeps/riscv/rv32/rvf/s_lrintf.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_ceil.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_floor.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_llrint.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_llround.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_lrint.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_lround.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_nearbyint.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_rint.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_round.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_roundeven.c
 create mode 100644 sysdeps/riscv/rv64/rvd/s_trunc.c
 create mode 100644 sysdeps/riscv/rv64/rvf/s_llrintf.c
 create mode 100644 sysdeps/riscv/rv64/rvf/s_llroundf.c
 create mode 100644 sysdeps/riscv/rv64/rvf/s_lrintf.c
 create mode 100644 sysdeps/riscv/rvd/e_sqrt.c
 create mode 100644 sysdeps/riscv/rvd/s_copysign.c
 create mode 100644 sysdeps/riscv/rvd/s_finite.c
 create mode 100644 sysdeps/riscv/rvd/s_fma.c
 create mode 100644 sysdeps/riscv/rvd/s_fmax.c
 create mode 100644 sysdeps/riscv/rvd/s_fmin.c
 create mode 100644 sysdeps/riscv/rvd/s_fpclassify.c
 create mode 100644 sysdeps/riscv/rvd/s_isinf.c
 create mode 100644 sysdeps/riscv/rvd/s_isnan.c
 create mode 100644 sysdeps/riscv/rvd/s_issignaling.c

diff --git a/sysdeps/riscv/rv32/rvd/s_lrint.c b/sysdeps/riscv/rv32/rvd/s_lrint.c
new file mode 100644
index 000000000000..7a1fff6ffd27
--- /dev/null
+++ b/sysdeps/riscv/rv32/rvd/s_lrint.c
@@ -0,0 +1,30 @@
+/* lrint().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <libm-alias-double.h>
+
+long
+__lrint (double x)
+{
+  long res;
+  asm ("fcvt.w.d %0, %1" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_double (__lrint, lrint)
diff --git a/sysdeps/riscv/rv32/rvd/s_lround.c b/sysdeps/riscv/rv32/rvd/s_lround.c
new file mode 100644
index 000000000000..7c2e0b81fbe0
--- /dev/null
+++ b/sysdeps/riscv/rv32/rvd/s_lround.c
@@ -0,0 +1,30 @@
+/* lround().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <libm-alias-double.h>
+
+long
+__lround (double x)
+{
+  long res;
+  asm ("fcvt.w.d %0, %1, rmm" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_double (__lround, lround)
diff --git a/sysdeps/riscv/rv32/rvf/s_llrintf.c b/sysdeps/riscv/rv32/rvf/s_llrintf.c
new file mode 100644
index 000000000000..3de8aa99a7f3
--- /dev/null
+++ b/sysdeps/riscv/rv32/rvf/s_llrintf.c
@@ -0,0 +1,30 @@
+/* lrintf().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <libm-alias-float.h>
+
+long long
+__llrintf (float x)
+{
+  long res;
+  asm ("fcvt.w.s %0, %1" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_float (__llrint, llrint)
diff --git a/sysdeps/riscv/rv32/rvf/s_lrintf.c b/sysdeps/riscv/rv32/rvf/s_lrintf.c
new file mode 100644
index 000000000000..806a160ce0d7
--- /dev/null
+++ b/sysdeps/riscv/rv32/rvf/s_lrintf.c
@@ -0,0 +1,30 @@
+/* lrintf().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <libm-alias-float.h>
+
+long
+__lrintf (float x)
+{
+  long res;
+  asm ("fcvt.w.s %0, %1" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_float (__lrint, lrint)
diff --git a/sysdeps/riscv/rv64/rvd/s_ceil.c b/sysdeps/riscv/rv64/rvd/s_ceil.c
new file mode 100644
index 000000000000..7968148b75a9
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_ceil.c
@@ -0,0 +1,51 @@
+/* ceil().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+#include <libm-alias-double.h>
+
+double
+__ceil (double x)
+{
+  int flags = riscv_getflags ();
+  int nan = isnan (x);
+  double mag = fabs (x);
+
+  if (nan)
+    return x + x;
+
+  if (mag < (1ULL << __DBL_MANT_DIG__))
+    {
+      long i;
+      double new_x;
+
+      asm volatile ("fcvt.l.d %0, %1, rup" : "=r" (i) : "f" (x));
+      asm volatile ("fcvt.d.l %0, %1, rup" : "=f" (new_x) : "r" (i));
+
+      /* ceil(-0) == -0, and in general we'll always have the same
+	 sign as our input.  */
+      x = copysign (new_x, x);
+
+      riscv_setflags (flags);
+    }
+
+  return x;
+}
+
+libm_alias_double (__ceil, ceil)
diff --git a/sysdeps/riscv/rv64/rvd/s_floor.c b/sysdeps/riscv/rv64/rvd/s_floor.c
new file mode 100644
index 000000000000..01ec0e06e4ce
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_floor.c
@@ -0,0 +1,51 @@
+/* floor().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+#include <libm-alias-double.h>
+
+double
+__floor (double x)
+{
+  int flags = riscv_getflags ();
+  int nan = isnan (x);
+  double mag = fabs (x);
+
+  if (nan)
+    return x + x;
+
+  if (mag < (1ULL << __DBL_MANT_DIG__))
+    {
+      long i;
+      double new_x;
+
+      asm volatile ("fcvt.l.d %0, %1, rdn" : "=r" (i) : "f" (x));
+      asm volatile ("fcvt.d.l %0, %1, rdn" : "=f" (new_x) : "r" (i));
+
+      /* floor(-0) == -0, and in general we'll always have the same
+	 sign as our input.  */
+      x = copysign (new_x, x);
+
+      riscv_setflags (flags);
+    }
+
+  return x;
+}
+
+libm_alias_double (__floor, floor)
diff --git a/sysdeps/riscv/rv64/rvd/s_llrint.c b/sysdeps/riscv/rv64/rvd/s_llrint.c
new file mode 100644
index 000000000000..77a7b0712f9c
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_llrint.c
@@ -0,0 +1,29 @@
+/* llrint().  RISC-V version.
+   Copyright (C) 2017 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 <libm-alias-double.h>
+
+long long
+__llrint (double x)
+{
+  long long res;
+  asm ("fcvt.l.d %0, %1" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_double(__llrint, llrint)
diff --git a/sysdeps/riscv/rv64/rvd/s_llround.c b/sysdeps/riscv/rv64/rvd/s_llround.c
new file mode 100644
index 000000000000..5df866de7245
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_llround.c
@@ -0,0 +1,29 @@
+/* llround().  RISC-V version.
+   Copyright (C) 2017 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 <libm-alias-double.h>
+
+long long
+__llround (double x)
+{
+  long long res;
+  asm ("fcvt.l.d %0, %1, rmm" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_double (__llround, llround)
diff --git a/sysdeps/riscv/rv64/rvd/s_lrint.c b/sysdeps/riscv/rv64/rvd/s_lrint.c
new file mode 100644
index 000000000000..2d11cc3cd16d
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_lrint.c
@@ -0,0 +1,29 @@
+/* lrint().  RISC-V version.
+   Copyright (C) 2017 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 <libm-alias-double.h>
+
+long
+__lrint (double x)
+{
+  long res;
+  asm ("fcvt.l.d %0, %1" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_double (__lrint, lrint)
diff --git a/sysdeps/riscv/rv64/rvd/s_lround.c b/sysdeps/riscv/rv64/rvd/s_lround.c
new file mode 100644
index 000000000000..b4f37e15bd2e
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_lround.c
@@ -0,0 +1,29 @@
+/* llround().  RISC-V version.
+   Copyright (C) 2017 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 <libm-alias-double.h>
+
+long
+__lround (double x)
+{
+  long res;
+  asm ("fcvt.l.d %0, %1, rmm" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_double (__lround, lround)
diff --git a/sysdeps/riscv/rv64/rvd/s_nearbyint.c b/sysdeps/riscv/rv64/rvd/s_nearbyint.c
new file mode 100644
index 000000000000..aa4399f9c7f3
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_nearbyint.c
@@ -0,0 +1,51 @@
+/* nearbyint().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+#include <libm-alias-double.h>
+
+double
+__nearbyint (double x)
+{
+  int flags = riscv_getflags ();
+  int nan = isnan (x);
+  double mag = fabs (x);
+
+  if (nan)
+    return x + x;
+
+  if (mag < (1ULL << __DBL_MANT_DIG__))
+    {
+      long i;
+      double new_x;
+
+      asm volatile ("fcvt.l.d %0, %1" : "=r" (i) : "f" (x));
+      asm volatile ("fcvt.d.l %0, %1" : "=f" (new_x) : "r" (i));
+
+      /* nearbyint(-0) == -0, and in general we'll always have the same
+	 sign as our input.  */
+      x = copysign (new_x, x);
+
+      riscv_setflags (flags);
+    }
+
+  return x;
+}
+
+libm_alias_double (__nearbyint, nearbyint)
diff --git a/sysdeps/riscv/rv64/rvd/s_rint.c b/sysdeps/riscv/rv64/rvd/s_rint.c
new file mode 100644
index 000000000000..a44d43373dc6
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_rint.c
@@ -0,0 +1,51 @@
+/* rint().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+#include <libm-alias-double.h>
+
+double
+__rint (double x)
+{
+  int nan;
+  double mag;
+
+  nan = isnan (x);
+  mag = fabs (x);
+
+  if (nan)
+    return x + x;
+
+  if (mag < (1ULL << __DBL_MANT_DIG__))
+    {
+      long i;
+      double new_x;
+
+      asm ("fcvt.l.d %0, %1" : "=r" (i) : "f" (x));
+      asm ("fcvt.d.l %0, %1" : "=f" (new_x) : "r" (i));
+
+      /* rint(-0) == -0, and in general we'll always have the same
+	 sign as our input.  */
+      x = copysign (new_x, x);
+    }
+
+  return x;
+}
+
+libm_alias_double (__rint, rint)
diff --git a/sysdeps/riscv/rv64/rvd/s_round.c b/sysdeps/riscv/rv64/rvd/s_round.c
new file mode 100644
index 000000000000..84e4fbfa7997
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_round.c
@@ -0,0 +1,51 @@
+/* round().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+#include <libm-alias-double.h>
+
+double
+__round (double x)
+{
+  int flags = riscv_getflags ();
+  int nan = isnan (x);
+  double mag = fabs (x);
+
+  if (nan)
+    return x + x;
+
+  if (mag < (1ULL << __DBL_MANT_DIG__))
+    {
+      long i;
+      double new_x;
+
+      asm volatile ("fcvt.l.d %0, %1, rmm" : "=r" (i) : "f" (x));
+      asm volatile ("fcvt.d.l %0, %1, rmm" : "=f" (new_x) : "r" (i));
+
+      /* round(-0) == -0, and in general we'll always have the same
+	 sign as our input.  */
+      x = copysign (new_x, x);
+
+      riscv_setflags (flags);
+    }
+
+  return x;
+}
+
+libm_alias_double (__round, round)
diff --git a/sysdeps/riscv/rv64/rvd/s_roundeven.c b/sysdeps/riscv/rv64/rvd/s_roundeven.c
new file mode 100644
index 000000000000..145955c3d6fc
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_roundeven.c
@@ -0,0 +1,54 @@
+/* Round to nearest integer value, rounding halfway cases to even.
+   RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+#include <libm-alias-double.h>
+
+double
+__roundeven (double x)
+{
+  int flags = riscv_getflags ();
+  int nan = isnan (x);
+  double mag = fabs (x);
+
+  if (nan)
+    return x + x;
+
+  if (mag < (1ULL << __DBL_MANT_DIG__))
+    {
+      long i;
+      double new_x;
+
+      asm volatile ("fcvt.l.d %0, %1, rne" : "=r" (i) : "f" (x));
+      asm volatile ("fcvt.d.l %0, %1, rne" : "=f" (new_x) : "r" (i));
+
+      /* roundeven(-0) == -0, and in general we'll always have the same
+	 sign as our input.  */
+      x = copysign (new_x, x);
+
+      riscv_setflags (flags);
+    }
+
+  return x;
+}
+
+hidden_def (__roundeven)
+libm_alias_double (__roundeven, roundeven)
diff --git a/sysdeps/riscv/rv64/rvd/s_trunc.c b/sysdeps/riscv/rv64/rvd/s_trunc.c
new file mode 100644
index 000000000000..577e9da50554
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvd/s_trunc.c
@@ -0,0 +1,51 @@
+/* trunc().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+#include <libm-alias-double.h>
+
+double
+__trunc (double x)
+{
+  int flags = riscv_getflags ();
+  int nan = isnan (x);
+  double mag = fabs (x);
+
+  if (nan)
+    return x + x;
+
+  if (mag < (1ULL << __DBL_MANT_DIG__))
+    {
+      long i;
+      double new_x;
+
+      asm volatile ("fcvt.l.d %0, %1, rtz" : "=r" (i) : "f" (x));
+      asm volatile ("fcvt.d.l %0, %1, rtz" : "=f" (new_x) : "r" (i));
+
+      /* trunc(-0) == -0, and in general we'll always have the same
+	 sign as our input.  */
+      x = copysign (new_x, x);
+
+      riscv_setflags (flags);
+    }
+
+  return x;
+}
+
+libm_alias_double (__trunc, trunc)
diff --git a/sysdeps/riscv/rv64/rvf/s_llrintf.c b/sysdeps/riscv/rv64/rvf/s_llrintf.c
new file mode 100644
index 000000000000..69f4e8ea9b56
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvf/s_llrintf.c
@@ -0,0 +1,30 @@
+/* Round argument to nearest integral value according to current rounding
+   direction.  RISC-V version.
+   Copyright (C) 2017 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 <libm-alias-float.h>
+
+long long
+__llrintf (float x)
+{
+  long long res;
+  asm ("fcvt.l.s %0, %1" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_float(__llrint, llrint)
diff --git a/sysdeps/riscv/rv64/rvf/s_llroundf.c b/sysdeps/riscv/rv64/rvf/s_llroundf.c
new file mode 100644
index 000000000000..5b69c01648ec
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvf/s_llroundf.c
@@ -0,0 +1,30 @@
+/* Round float value to long long int.  RISC-V version.
+   Copyright (C) 2017 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 <libm-alias-float.h>
+#include <libm-alias-float.h>
+
+long long
+__llroundf (float x)
+{
+  long long res;
+  asm ("fcvt.l.s %0, %1, rmm" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_float (__llround, llround)
diff --git a/sysdeps/riscv/rv64/rvf/s_lrintf.c b/sysdeps/riscv/rv64/rvf/s_lrintf.c
new file mode 100644
index 000000000000..cb28ffe1b536
--- /dev/null
+++ b/sysdeps/riscv/rv64/rvf/s_lrintf.c
@@ -0,0 +1,30 @@
+/* lrintf().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <libm-alias-float.h>
+
+long
+__lrintf (float x)
+{
+  long res;
+  asm ("fcvt.l.s %0, %1" : "=r" (res) : "f" (x));
+  return res;
+}
+
+libm_alias_float (__lrint, lrint)
diff --git a/sysdeps/riscv/rvd/e_sqrt.c b/sysdeps/riscv/rvd/e_sqrt.c
new file mode 100644
index 000000000000..ceac9f4c34a4
--- /dev/null
+++ b/sysdeps/riscv/rvd/e_sqrt.c
@@ -0,0 +1,27 @@
+/* Double precision floating point square root.  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+
+double
+__ieee754_sqrt (double x)
+{
+  asm ("fsqrt.d %0, %1" : "=f" (x) : "f" (x));
+  return x;
+}
+strong_alias (__ieee754_sqrt, __sqrt_finite)
diff --git a/sysdeps/riscv/rvd/s_copysign.c b/sysdeps/riscv/rvd/s_copysign.c
new file mode 100644
index 000000000000..d3a5000a6e7b
--- /dev/null
+++ b/sysdeps/riscv/rvd/s_copysign.c
@@ -0,0 +1,28 @@
+/* Copy sign bit between floating-point values.  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <libm-alias-double.h>
+
+double
+__copysign (double x, double y)
+{
+  asm ("fsgnj.d %0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
+  return x;
+}
+libm_alias_double (__copysign, copysign)
diff --git a/sysdeps/riscv/rvd/s_finite.c b/sysdeps/riscv/rvd/s_finite.c
new file mode 100644
index 000000000000..06914e1c1e71
--- /dev/null
+++ b/sysdeps/riscv/rvd/s_finite.c
@@ -0,0 +1,28 @@
+/* finite().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+
+int
+__finite (double x)
+{
+  return _FCLASS (x) & ~(_FCLASS_INF | _FCLASS_NAN);
+}
+hidden_def (__finite)
+weak_alias (__finite, finite)
diff --git a/sysdeps/riscv/rvd/s_fma.c b/sysdeps/riscv/rvd/s_fma.c
new file mode 100644
index 000000000000..ff74857cf578
--- /dev/null
+++ b/sysdeps/riscv/rvd/s_fma.c
@@ -0,0 +1,30 @@
+/* Double precision floating point fused multiply-add.  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <fenv.h>
+#include <ieee754.h>
+#include <libm-alias-double.h>
+
+double
+__fma (double x, double y, double z)
+{
+  asm ("fmadd.d %0, %1, %2, %3" : "=f" (x) : "f" (x), "f" (y), "f" (z));
+  return x;
+}
+libm_alias_double (__fma, fma)
diff --git a/sysdeps/riscv/rvd/s_fmax.c b/sysdeps/riscv/rvd/s_fmax.c
new file mode 100644
index 000000000000..b108434cd64b
--- /dev/null
+++ b/sysdeps/riscv/rvd/s_fmax.c
@@ -0,0 +1,28 @@
+/* fmax().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <libm-alias-double.h>
+
+double
+__fmax (double x, double y)
+{
+  asm ("fmax.d %0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
+  return x;
+}
+libm_alias_double (__fmax, fmax)
diff --git a/sysdeps/riscv/rvd/s_fmin.c b/sysdeps/riscv/rvd/s_fmin.c
new file mode 100644
index 000000000000..4894377602c3
--- /dev/null
+++ b/sysdeps/riscv/rvd/s_fmin.c
@@ -0,0 +1,28 @@
+/* fmin().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <libm-alias-double.h>
+
+double
+__fmin (double x, double y)
+{
+  asm ("fmin.d %0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
+  return x;
+}
+libm_alias_double (__fmin, fmin)
diff --git a/sysdeps/riscv/rvd/s_fpclassify.c b/sysdeps/riscv/rvd/s_fpclassify.c
new file mode 100644
index 000000000000..cdfdbdfbc1e2
--- /dev/null
+++ b/sysdeps/riscv/rvd/s_fpclassify.c
@@ -0,0 +1,36 @@
+/* fpclassify().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+
+int
+__fpclassify (double x)
+{
+  int cls = _FCLASS (x);
+  if (__builtin_expect (cls & _FCLASS_NORM, _FCLASS_NORM))
+    return FP_NORMAL;
+  if (__builtin_expect (cls & _FCLASS_ZERO, _FCLASS_ZERO))
+    return FP_ZERO;
+  if (__builtin_expect (cls & _FCLASS_SUBNORM, _FCLASS_SUBNORM))
+    return FP_SUBNORMAL;
+  if (__builtin_expect (cls & _FCLASS_INF, _FCLASS_INF))
+    return FP_INFINITE;
+  return FP_NAN;
+}
+libm_hidden_def (__fpclassify)
diff --git a/sysdeps/riscv/rvd/s_isinf.c b/sysdeps/riscv/rvd/s_isinf.c
new file mode 100644
index 000000000000..92d2f2c261bc
--- /dev/null
+++ b/sysdeps/riscv/rvd/s_isinf.c
@@ -0,0 +1,29 @@
+/* isinf().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+
+int
+__isinf (double x)
+{
+  int cls = _FCLASS (x);
+  return -((cls & _FCLASS_MINF) ? 1 : 0) | ((cls & _FCLASS_PINF) ? 1 : 0);
+}
+hidden_def (__isinf)
+weak_alias (__isinf, isinf)
diff --git a/sysdeps/riscv/rvd/s_isnan.c b/sysdeps/riscv/rvd/s_isnan.c
new file mode 100644
index 000000000000..e88b47287952
--- /dev/null
+++ b/sysdeps/riscv/rvd/s_isnan.c
@@ -0,0 +1,28 @@
+/* isnan().  RISC_V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+
+int
+__isnan (double x)
+{
+  return _FCLASS (x) & _FCLASS_NAN;
+}
+hidden_def (__isnan)
+weak_alias (__isnan, isnan)
diff --git a/sysdeps/riscv/rvd/s_issignaling.c b/sysdeps/riscv/rvd/s_issignaling.c
new file mode 100644
index 000000000000..6136d7e7f33f
--- /dev/null
+++ b/sysdeps/riscv/rvd/s_issignaling.c
@@ -0,0 +1,27 @@
+/* issignaling().  RISC-V version.
+   Copyright (C) 2017 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 <math.h>
+#include <math_private.h>
+
+int
+__issignaling (double x)
+{
+  return _FCLASS (x) & _FCLASS_SNAN;
+}
+libm_hidden_def (__issignaling)
-- 
2.13.6