17 files changed, 722 insertions, 0 deletions
diff --git a/libm/or1k/Makefile.arch b/libm/or1k/Makefile.arch
new file mode 100644
index 000000000..bd38690be
--- /dev/null
+++ b/libm/or1k/Makefile.arch
@@ -0,0 +1,16 @@
+# Makefile for uClibc-ng
+# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+ifeq ($(UCLIBC_HAS_FENV),y)
+libm_ARCH_SRC:=$(wildcard $(libm_ARCH_DIR)/*.c)
+libm_ARCH_OBJ:=$(patsubst $(libm_ARCH_DIR)/%.c,$(libm_ARCH_OUT)/%.o,$(libm_ARCH_SRC))
+endif
+
+libm_ARCH_OBJS:=$(libm_ARCH_OBJ)
+
+ifeq ($(DOPIC),y)
+libm-a-y+=$(libm_ARCH_OBJS:.o=.os)
+else
+libm-a-y+=$(libm_ARCH_OBJS)
+endif
+libm-so-y+=$(libm_ARCH_OBJS:.o=.os)
diff --git a/libm/or1k/fclrexcpt.c b/libm/or1k/fclrexcpt.c
new file mode 100644
index 000000000..ecb327d72
--- /dev/null
+++ b/libm/or1k/fclrexcpt.c
@@ -0,0 +1,42 @@
+/* Clear given exceptions in current floating-point environment.
+   OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+feclearexcept (int excepts)
+{
+  fpu_control_t cw;
+  fpu_control_t cw_new;
+
+  /* Mask out unsupported bits/exceptions.  */
+  excepts &= FE_ALL_EXCEPT;
+
+  /* Read the complete control word.  */
+  _FPU_GETCW (cw);
+
+  cw_new = cw & ~excepts;
+
+  /* Put the new data in effect.  */
+  if (cw != cw_new)
+    _FPU_SETCW (cw_new);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/fegetenv.c b/libm/or1k/fegetenv.c
new file mode 100644
index 000000000..7769d456f
--- /dev/null
+++ b/libm/or1k/fegetenv.c
@@ -0,0 +1,28 @@
+/* Store current floating-point environment.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetenv (fenv_t *envp)
+{
+  _FPU_GETCW (*envp);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/fegetmode.c b/libm/or1k/fegetmode.c
new file mode 100644
index 000000000..40a789329
--- /dev/null
+++ b/libm/or1k/fegetmode.c
@@ -0,0 +1,28 @@
+/* Store current floating-point control modes.  OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetmode (femode_t *modep)
+{
+  _FPU_GETCW (*modep);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/fegetround.c b/libm/or1k/fegetround.c
new file mode 100644
index 000000000..0965de2f9
--- /dev/null
+++ b/libm/or1k/fegetround.c
@@ -0,0 +1,25 @@
+/* Return current rounding direction.  OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include "get-rounding-mode.h"
+
+int
+fegetround (void)
+{
+  return get_rounding_mode ();
+}
diff --git a/libm/or1k/feholdexcpt.c b/libm/or1k/feholdexcpt.c
new file mode 100644
index 000000000..cff06f3d0
--- /dev/null
+++ b/libm/or1k/feholdexcpt.c
@@ -0,0 +1,29 @@
+/* Store current floating-point environment and clear exceptions.
+   OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include "fenv_private.h"
+
+int
+feholdexcept (fenv_t *envp)
+{
+  libc_feholdexcept_or1k (envp);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/fenv_private.h b/libm/or1k/fenv_private.h
new file mode 100644
index 000000000..ede7d243a
--- /dev/null
+++ b/libm/or1k/fenv_private.h
@@ -0,0 +1,196 @@
+/* Private floating point rounding and exceptions handling.  OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef OR1K_FENV_PRIVATE_H
+#define OR1K_FENV_PRIVATE_H 1
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+static __always_inline void
+libc_feholdexcept_or1k (fenv_t *envp)
+{
+  fpu_control_t cw;
+  fpu_control_t cw_new;
+
+  /* Get and store the environment.  */
+  _FPU_GETCW (cw);
+  *envp = cw;
+
+  /* Clear the exception status flags.  */
+  cw_new = cw & ~FE_ALL_EXCEPT;
+
+  if (cw != cw_new)
+    _FPU_SETCW (cw_new);
+}
+
+#define libc_feholdexcept  libc_feholdexcept_or1k
+#define libc_feholdexceptf libc_feholdexcept_or1k
+#define libc_feholdexceptl libc_feholdexcept_or1k
+
+static __always_inline void
+libc_fesetround_or1k (int round)
+{
+  fpu_control_t cw;
+  fpu_control_t cw_new;
+
+  _FPU_GETCW (cw);
+  cw_new = cw & ~_FPU_FPCSR_RM_MASK;
+  cw_new |= round;
+  if (cw != cw_new)
+    _FPU_SETCW (cw_new);
+}
+
+#define libc_fesetround  libc_fesetround_or1k
+#define libc_fesetroundf libc_fesetround_or1k
+#define libc_fesetroundl libc_fesetround_or1k
+
+static __always_inline void
+libc_feholdexcept_setround_or1k (fenv_t *envp, int round)
+{
+  fpu_control_t cw;
+  fpu_control_t cw_new;
+
+  /* Get and store the environment.  */
+  _FPU_GETCW (cw);
+  *envp = cw;
+
+  /* Clear the status flags and rounding mode.  */
+  cw_new = cw & ~(FE_ALL_EXCEPT | _FPU_FPCSR_RM_MASK);
+
+  /* Set rounding mode.  */
+  cw_new |= round;
+
+  if (cw != cw_new)
+    _FPU_SETCW (cw_new);
+}
+
+#define libc_feholdexcept_setround  libc_feholdexcept_setround_or1k
+#define libc_feholdexcept_setroundf libc_feholdexcept_setround_or1k
+#define libc_feholdexcept_setroundl libc_feholdexcept_setround_or1k
+
+static __always_inline int
+libc_fetestexcept_or1k (int ex)
+{
+  fpu_control_t cw;
+
+  /* Get current control word.  */
+  _FPU_GETCW (cw);
+
+  /* Check if any of the queried exception flags are set.  */
+  return cw & ex & FE_ALL_EXCEPT;
+}
+
+#define libc_fetestexcept  libc_fetestexcept_or1k
+#define libc_fetestexceptf libc_fetestexcept_or1k
+#define libc_fetestexceptl libc_fetestexcept_or1k
+
+static __always_inline void
+libc_fesetenv_or1k (const fenv_t *envp)
+{
+  if (envp == FE_DFL_ENV)
+    _FPU_SETCW (_FPU_DEFAULT);
+  else
+    _FPU_SETCW (*envp);
+}
+
+#define libc_fesetenv  libc_fesetenv_or1k
+#define libc_fesetenvf libc_fesetenv_or1k
+#define libc_fesetenvl libc_fesetenv_or1k
+#define libc_feresetround_noex  libc_fesetenv_or1k
+#define libc_feresetround_noexf libc_fesetenv_or1k
+#define libc_feresetround_noexl libc_fesetenv_or1k
+
+static __always_inline int
+libc_feupdateenv_test_or1k (const fenv_t *envp, int ex)
+{
+  fpu_control_t cw;
+  fpu_control_t cw_new;
+  int excepts;
+
+  /* Get current control word.  */
+  _FPU_GETCW (cw);
+
+  /* Merge current exception flags with the passed fenv.  */
+  excepts = cw & FE_ALL_EXCEPT;
+  cw_new = (envp == FE_DFL_ENV ? _FPU_DEFAULT : *envp) | excepts;
+
+  if (unlikely (cw != cw_new))
+    _FPU_SETCW (cw_new);
+
+  /* Raise the exceptions if enabled in the new FP state.  */
+  if (unlikely (excepts))
+    feraiseexcept (excepts);
+
+  return excepts & ex;
+}
+
+#define libc_feupdateenv_test  libc_feupdateenv_test_or1k
+#define libc_feupdateenv_testf libc_feupdateenv_test_or1k
+#define libc_feupdateenv_testl libc_feupdateenv_test_or1k
+
+static __always_inline void
+libc_feupdateenv_or1k (const fenv_t *envp)
+{
+  libc_feupdateenv_test_or1k (envp, 0);
+}
+
+#define libc_feupdateenv  libc_feupdateenv_or1k
+#define libc_feupdateenvf libc_feupdateenv_or1k
+#define libc_feupdateenvl libc_feupdateenv_or1k
+
+static __always_inline void
+libc_feholdsetround_or1k (fenv_t *envp, int round)
+{
+  fpu_control_t cw;
+
+  _FPU_GETCW (cw);
+  *envp = cw;
+
+  /* Check whether rounding modes are different.  */
+  round = (cw ^ round) & _FPU_FPCSR_RM_MASK;
+
+  /* Set new rounding mode if different.  */
+  if (unlikely (round != 0))
+    _FPU_SETCW (cw ^ round);
+}
+
+#define libc_feholdsetround  libc_feholdsetround_or1k
+#define libc_feholdsetroundf libc_feholdsetround_or1k
+#define libc_feholdsetroundl libc_feholdsetround_or1k
+
+static __always_inline void
+libc_feresetround_or1k (fenv_t *envp)
+{
+  fpu_control_t cw;
+  int round;
+
+  _FPU_GETCW (cw);
+
+  /* Check whether rounding modes are different.  */
+  round = (*envp ^ cw) & _FPU_FPCSR_RM_MASK;
+
+  /* Restore the rounding mode if it was changed.  */
+  if (unlikely (round != 0))
+    _FPU_SETCW (cw ^ round);
+}
+
+#define libc_feresetround  libc_feresetround_or1k
+#define libc_feresetroundf libc_feresetround_or1k
+#define libc_feresetroundl libc_feresetround_or1k
+
+#endif
diff --git a/libm/or1k/fesetenv.c b/libm/or1k/fesetenv.c
new file mode 100644
index 000000000..a9c8448f4
--- /dev/null
+++ b/libm/or1k/fesetenv.c
@@ -0,0 +1,28 @@
+/* Install given floating-point environment.  OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include "fenv_private.h"
+
+int
+fesetenv (const fenv_t *envp)
+{
+  libc_fesetenv_or1k (envp);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/fesetexcept.c b/libm/or1k/fesetexcept.c
new file mode 100644
index 000000000..abc5624c3
--- /dev/null
+++ b/libm/or1k/fesetexcept.c
@@ -0,0 +1,34 @@
+/* Set given exception flags.  OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetexcept (int excepts)
+{
+  fpu_control_t cw;
+  fpu_control_t cw_new;
+
+  _FPU_GETCW (cw);
+  cw_new = cw | (excepts & FE_ALL_EXCEPT);
+  if (cw != cw_new)
+    _FPU_SETCW (cw_new);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/fesetmode.c b/libm/or1k/fesetmode.c
new file mode 100644
index 000000000..74490621b
--- /dev/null
+++ b/libm/or1k/fesetmode.c
@@ -0,0 +1,38 @@
+/* Install given floating-point control modes.  OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetmode (const femode_t *modep)
+{
+  fpu_control_t cw;
+  fpu_control_t cw_new;
+
+  _FPU_GETCW (cw);
+  cw_new = cw & ~_FPU_FPCSR_RM_MASK;
+  if (modep == FE_DFL_MODE)
+    cw_new |= (_FPU_DEFAULT & _FPU_FPCSR_RM_MASK);
+  else
+    cw_new |= (*modep & _FPU_FPCSR_RM_MASK);
+  if (cw != cw_new)
+    _FPU_SETCW (cw_new);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/fesetround.c b/libm/or1k/fesetround.c
new file mode 100644
index 000000000..37c2db4ab
--- /dev/null
+++ b/libm/or1k/fesetround.c
@@ -0,0 +1,35 @@
+/* Set current rounding direction.  OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include "fenv_private.h"
+
+int
+fesetround (int round)
+{
+  switch (round)
+    {
+    case FE_TONEAREST:
+    case FE_TOWARDZERO:
+    case FE_DOWNWARD:
+    case FE_UPWARD:
+      libc_fesetround_or1k (round);
+      return 0;
+    default:
+      return round; /* A nonzero value.  */
+    }
+}
diff --git a/libm/or1k/feupdateenv.c b/libm/or1k/feupdateenv.c
new file mode 100644
index 000000000..b0f42744f
--- /dev/null
+++ b/libm/or1k/feupdateenv.c
@@ -0,0 +1,29 @@
+/* Install given floating-point environment and raise exceptions.
+   OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include "fenv_private.h"
+
+int
+feupdateenv (const fenv_t *envp)
+{
+  libc_feupdateenv_or1k (envp);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/fgetexcptflg.c b/libm/or1k/fgetexcptflg.c
new file mode 100644
index 000000000..2a725a4c7
--- /dev/null
+++ b/libm/or1k/fgetexcptflg.c
@@ -0,0 +1,28 @@
+/* Store current state of exceptions.  OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include "fenv_private.h"
+
+int
+fegetexceptflag (fexcept_t *flagp, int excepts)
+{
+  *flagp = libc_fetestexcept_or1k (excepts);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/fraiseexcpt.c b/libm/or1k/fraiseexcpt.c
new file mode 100644
index 000000000..31ceb830d
--- /dev/null
+++ b/libm/or1k/fraiseexcpt.c
@@ -0,0 +1,63 @@
+/* Raise given exceptions.  OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+#include <float.h>
+#include <math.h>
+
+int
+feraiseexcept (int excepts)
+{
+  if (excepts == 0)
+    return 0;
+
+  /* Raise exceptions represented by EXPECTS.  */
+
+  if (excepts & FE_INEXACT)
+  {
+    float d = 1.0, x = 3.0;
+    __asm__ volatile ("lf.div.s %0, %0, %1" : "+r" (d) : "r" (x));
+  }
+
+  if (excepts & FE_UNDERFLOW)
+  {
+    float d = FLT_MIN;
+    __asm__ volatile ("lf.mul.s %0, %0, %0" : "+r" (d));
+  }
+
+  if (excepts & FE_OVERFLOW)
+  {
+    float d = FLT_MAX;
+    __asm__ volatile ("lf.mul.s %0, %0, %0" : "+r" (d) : "r" (d));
+  }
+
+  if (excepts & FE_DIVBYZERO)
+  {
+    float d = 1.0, x = 0.0;
+    __asm__ volatile ("lf.div.s %0, %0, %1" : "+r" (d) : "r" (x));
+  }
+
+  if (excepts & FE_INVALID)
+  {
+    float d = HUGE_VAL, x = 0.0;
+    __asm__ volatile ("lf.mul.s %0, %1, %0" : "+r" (d) : "r" (x));
+  }
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/fsetexcptflg.c b/libm/or1k/fsetexcptflg.c
new file mode 100644
index 000000000..01c6e8635
--- /dev/null
+++ b/libm/or1k/fsetexcptflg.c
@@ -0,0 +1,42 @@
+/* Set floating-point environment exception handling.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetexceptflag (const fexcept_t *flagp, int excepts)
+{
+  fpu_control_t cw;
+  fpu_control_t cw_new;
+
+  /* Get the current exceptions.  */
+  _FPU_GETCW (cw);
+
+  /* Make sure the flags we want restored are legal.  */
+  excepts &= FE_ALL_EXCEPT;
+
+  /* Now set selected bits from flagp. Note that we ignore all non-flag
+     bits from *flagp, so they don't matter.  */
+  cw_new = (cw & ~excepts) | (*flagp & excepts);
+
+  if (cw != cw_new)
+    _FPU_SETCW (cw_new);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/libm/or1k/ftestexcept.c b/libm/or1k/ftestexcept.c
new file mode 100644
index 000000000..02ddf12c8
--- /dev/null
+++ b/libm/or1k/ftestexcept.c
@@ -0,0 +1,25 @@
+/* Test exception in current environment.  OpenRISC version.
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include "fenv_private.h"
+
+int
+fetestexcept (int excepts)
+{
+  return libc_fetestexcept_or1k (excepts);
+}
diff --git a/libm/or1k/get-rounding-mode.h b/libm/or1k/get-rounding-mode.h
new file mode 100644
index 000000000..f65c4ecc0
--- /dev/null
+++ b/libm/or1k/get-rounding-mode.h
@@ -0,0 +1,36 @@
+/* Determine floating-point rounding mode within libc.  OpenRISC version.
+
+   Copyright (C) 2024-2025 Free Software Foundation, Inc.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _OR1K_GET_ROUNDING_MODE_H
+#define _OR1K_GET_ROUNDING_MODE_H	1
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+/* Return the floating-point rounding mode.  */
+
+static inline int
+get_rounding_mode (void)
+{
+  fpu_control_t cw;
+
+  _FPU_GETCW (cw);
+  return cw & _FPU_FPCSR_RM_MASK;
+}
+
+#endif /* get-rounding-mode.h */