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-rw-r--r--libm/arc/Makefile.arch16
-rw-r--r--libm/arc/fclrexcpt.c34
-rw-r--r--libm/arc/fegetenv.c33
-rw-r--r--libm/arc/fegetmode.c30
-rw-r--r--libm/arc/fegetround.c28
-rw-r--r--libm/arc/feholdexcpt.c39
-rw-r--r--libm/arc/fenv_private.h326
-rw-r--r--libm/arc/fesetenv.c44
-rw-r--r--libm/arc/fesetexcept.c31
-rw-r--r--libm/arc/fesetmode.c39
-rw-r--r--libm/arc/fesetround.c36
-rw-r--r--libm/arc/feupdateenv.c47
-rw-r--r--libm/arc/fgetexcptflg.c30
-rw-r--r--libm/arc/fraiseexcpt.c35
-rw-r--r--libm/arc/fsetexcptflg.c37
-rw-r--r--libm/arc/ftestexcept.c31
-rw-r--r--libm/arc/get-rounding-mode.h37
17 files changed, 873 insertions, 0 deletions
diff --git a/libm/arc/Makefile.arch b/libm/arc/Makefile.arch
new file mode 100644
index 000000000..bd38690be
--- /dev/null
+++ b/libm/arc/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/arc/fclrexcpt.c b/libm/arc/fclrexcpt.c
new file mode 100644
index 000000000..76631657d
--- /dev/null
+++ b/libm/arc/fclrexcpt.c
@@ -0,0 +1,34 @@
+/* Clear given exceptions in current floating-point environment.
+ Copyright (C) 2020-2025 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)
+{
+ unsigned int fpsr;
+
+ _FPU_GETS (fpsr);
+
+ /* Clear the relevant bits, FWE is preserved. */
+ fpsr &= ~excepts;
+
+ _FPU_SETS (fpsr);
+
+ return 0;
+}
diff --git a/libm/arc/fegetenv.c b/libm/arc/fegetenv.c
new file mode 100644
index 000000000..ad332c3e5
--- /dev/null
+++ b/libm/arc/fegetenv.c
@@ -0,0 +1,33 @@
+/* Store current floating-point environment.
+ Copyright (C) 2020-2025 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)
+{
+ unsigned int fpcr;
+ unsigned int fpsr;
+
+ _FPU_GETCW (fpcr);
+ _FPU_GETS (fpsr);
+ envp->__fpcr = fpcr;
+ envp->__fpsr = fpsr;
+
+ return 0;
+}
diff --git a/libm/arc/fegetmode.c b/libm/arc/fegetmode.c
new file mode 100644
index 000000000..e6aebbc87
--- /dev/null
+++ b/libm/arc/fegetmode.c
@@ -0,0 +1,30 @@
+/* Store current floating-point control modes.
+ Copyright (C) 2020-2025 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)
+{
+ unsigned int fpcr;
+
+ _FPU_GETCW (fpcr);
+ *modep = fpcr;
+
+ return 0;
+}
diff --git a/libm/arc/fegetround.c b/libm/arc/fegetround.c
new file mode 100644
index 000000000..4dc476a7c
--- /dev/null
+++ b/libm/arc/fegetround.c
@@ -0,0 +1,28 @@
+/* Return current rounding direction.
+ Copyright (C) 2020-2025 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
+fegetround (void)
+{
+ unsigned int fpcr;
+ _FPU_GETCW (fpcr);
+
+ return (fpcr >> __FPU_RND_SHIFT) & __FPU_RND_MASK;
+}
diff --git a/libm/arc/feholdexcpt.c b/libm/arc/feholdexcpt.c
new file mode 100644
index 000000000..8febc7508
--- /dev/null
+++ b/libm/arc/feholdexcpt.c
@@ -0,0 +1,39 @@
+/* Store current floating-point environment and clear exceptions.
+ Copyright (C) 2020-2025 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)
+{
+ unsigned int fpcr;
+ unsigned int fpsr;
+
+ _FPU_GETCW (fpcr);
+ _FPU_GETS (fpsr);
+
+ envp->__fpcr = fpcr;
+ envp->__fpsr = fpsr;
+
+ fpsr &= ~FE_ALL_EXCEPT;
+
+ _FPU_SETCW (fpcr);
+ _FPU_SETS (fpsr);
+
+ return 0;
+}
diff --git a/libm/arc/fenv_private.h b/libm/arc/fenv_private.h
new file mode 100644
index 000000000..5f74c5e13
--- /dev/null
+++ b/libm/arc/fenv_private.h
@@ -0,0 +1,326 @@
+/* Optimized inline fenv.h functions for libm. Generic version.
+ Copyright (C) 2011-2025 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 _FENV_PRIVATE_H
+#define _FENV_PRIVATE_H 1
+
+#include <fenv.h>
+#include "get-rounding-mode.h"
+
+/* The standards only specify one variant of the fenv.h interfaces.
+ But at least for some architectures we can be more efficient if we
+ know what operations are going to be performed. Therefore we
+ define additional interfaces. By default they refer to the normal
+ interfaces. */
+
+static __always_inline void
+default_libc_feholdexcept (fenv_t *e)
+{
+ (void) feholdexcept (e);
+}
+
+#ifndef libc_feholdexcept
+# define libc_feholdexcept default_libc_feholdexcept
+#endif
+#ifndef libc_feholdexceptf
+# define libc_feholdexceptf default_libc_feholdexcept
+#endif
+#ifndef libc_feholdexceptl
+# define libc_feholdexceptl default_libc_feholdexcept
+#endif
+
+static __always_inline void
+default_libc_fesetround (int r)
+{
+ (void) fesetround (r);
+}
+
+#ifndef libc_fesetround
+# define libc_fesetround default_libc_fesetround
+#endif
+#ifndef libc_fesetroundf
+# define libc_fesetroundf default_libc_fesetround
+#endif
+#ifndef libc_fesetroundl
+# define libc_fesetroundl default_libc_fesetround
+#endif
+
+static __always_inline void
+default_libc_feholdexcept_setround (fenv_t *e, int r)
+{
+ feholdexcept (e);
+ fesetround (r);
+}
+
+#ifndef libc_feholdexcept_setround
+# define libc_feholdexcept_setround default_libc_feholdexcept_setround
+#endif
+#ifndef libc_feholdexcept_setroundf
+# define libc_feholdexcept_setroundf default_libc_feholdexcept_setround
+#endif
+#ifndef libc_feholdexcept_setroundl
+# define libc_feholdexcept_setroundl default_libc_feholdexcept_setround
+#endif
+
+#ifndef libc_feholdsetround_53bit
+# define libc_feholdsetround_53bit libc_feholdsetround
+#endif
+
+#ifndef libc_fetestexcept
+# define libc_fetestexcept fetestexcept
+#endif
+#ifndef libc_fetestexceptf
+# define libc_fetestexceptf fetestexcept
+#endif
+#ifndef libc_fetestexceptl
+# define libc_fetestexceptl fetestexcept
+#endif
+
+static __always_inline void
+default_libc_fesetenv (fenv_t *e)
+{
+ (void) fesetenv (e);
+}
+
+#ifndef libc_fesetenv
+# define libc_fesetenv default_libc_fesetenv
+#endif
+#ifndef libc_fesetenvf
+# define libc_fesetenvf default_libc_fesetenv
+#endif
+#ifndef libc_fesetenvl
+# define libc_fesetenvl default_libc_fesetenv
+#endif
+
+static __always_inline void
+default_libc_feupdateenv (fenv_t *e)
+{
+ (void) feupdateenv (e);
+}
+
+#ifndef libc_feupdateenv
+# define libc_feupdateenv default_libc_feupdateenv
+#endif
+#ifndef libc_feupdateenvf
+# define libc_feupdateenvf default_libc_feupdateenv
+#endif
+#ifndef libc_feupdateenvl
+# define libc_feupdateenvl default_libc_feupdateenv
+#endif
+
+#ifndef libc_feresetround_53bit
+# define libc_feresetround_53bit libc_feresetround
+#endif
+
+static __always_inline int
+default_libc_feupdateenv_test (fenv_t *e, int ex)
+{
+ int ret = fetestexcept (ex);
+ feupdateenv (e);
+ return ret;
+}
+
+#ifndef libc_feupdateenv_test
+# define libc_feupdateenv_test default_libc_feupdateenv_test
+#endif
+#ifndef libc_feupdateenv_testf
+# define libc_feupdateenv_testf default_libc_feupdateenv_test
+#endif
+#ifndef libc_feupdateenv_testl
+# define libc_feupdateenv_testl default_libc_feupdateenv_test
+#endif
+
+/* Save and set the rounding mode. The use of fenv_t to store the old mode
+ allows a target-specific version of this function to avoid converting the
+ rounding mode from the fpu format. By default we have no choice but to
+ manipulate the entire env. */
+
+#ifndef libc_feholdsetround
+# define libc_feholdsetround libc_feholdexcept_setround
+#endif
+#ifndef libc_feholdsetroundf
+# define libc_feholdsetroundf libc_feholdexcept_setroundf
+#endif
+#ifndef libc_feholdsetroundl
+# define libc_feholdsetroundl libc_feholdexcept_setroundl
+#endif
+
+/* ... and the reverse. */
+
+#ifndef libc_feresetround
+# define libc_feresetround libc_feupdateenv
+#endif
+#ifndef libc_feresetroundf
+# define libc_feresetroundf libc_feupdateenvf
+#endif
+#ifndef libc_feresetroundl
+# define libc_feresetroundl libc_feupdateenvl
+#endif
+
+/* ... and a version that also discards exceptions. */
+
+#ifndef libc_feresetround_noex
+# define libc_feresetround_noex libc_fesetenv
+#endif
+#ifndef libc_feresetround_noexf
+# define libc_feresetround_noexf libc_fesetenvf
+#endif
+#ifndef libc_feresetround_noexl
+# define libc_feresetround_noexl libc_fesetenvl
+#endif
+
+#ifndef HAVE_RM_CTX
+# define HAVE_RM_CTX 0
+#endif
+
+
+/* Default implementation using standard fenv functions.
+ Avoid unnecessary rounding mode changes by first checking the
+ current rounding mode. Note the use of unlikely is
+ important for performance. */
+
+static __always_inline void
+default_libc_feholdsetround_ctx (struct rm_ctx *ctx, int round)
+{
+ ctx->updated_status = false;
+
+ /* Update rounding mode only if different. */
+ if (unlikely (round != get_rounding_mode ()))
+ {
+ ctx->updated_status = true;
+ fegetenv (&ctx->env);
+ fesetround (round);
+ }
+}
+
+static __always_inline void
+default_libc_feresetround_ctx (struct rm_ctx *ctx)
+{
+ /* Restore the rounding mode if updated. */
+ if (unlikely (ctx->updated_status))
+ feupdateenv (&ctx->env);
+}
+
+static __always_inline void
+default_libc_feholdsetround_noex_ctx (struct rm_ctx *ctx, int round)
+{
+ /* Save exception flags and rounding mode, and disable exception
+ traps. */
+ feholdexcept (&ctx->env);
+
+ /* Update rounding mode only if different. */
+ if (unlikely (round != get_rounding_mode ()))
+ fesetround (round);
+}
+
+static __always_inline void
+default_libc_feresetround_noex_ctx (struct rm_ctx *ctx)
+{
+ /* Restore exception flags and rounding mode. */
+ fesetenv (&ctx->env);
+}
+
+#if HAVE_RM_CTX
+/* Set/Restore Rounding Modes only when necessary. If defined, these functions
+ set/restore floating point state only if the state needed within the lexical
+ block is different from the current state. This saves a lot of time when
+ the floating point unit is much slower than the fixed point units. */
+
+# ifndef libc_feholdsetround_noex_ctx
+# define libc_feholdsetround_noex_ctx libc_feholdsetround_ctx
+# endif
+# ifndef libc_feholdsetround_noexf_ctx
+# define libc_feholdsetround_noexf_ctx libc_feholdsetroundf_ctx
+# endif
+# ifndef libc_feholdsetround_noexl_ctx
+# define libc_feholdsetround_noexl_ctx libc_feholdsetroundl_ctx
+# endif
+
+# ifndef libc_feresetround_noex_ctx
+# define libc_feresetround_noex_ctx libc_fesetenv_ctx
+# endif
+# ifndef libc_feresetround_noexf_ctx
+# define libc_feresetround_noexf_ctx libc_fesetenvf_ctx
+# endif
+# ifndef libc_feresetround_noexl_ctx
+# define libc_feresetround_noexl_ctx libc_fesetenvl_ctx
+# endif
+
+#else
+
+# define libc_feholdsetround_ctx default_libc_feholdsetround_ctx
+# define libc_feresetround_ctx default_libc_feresetround_ctx
+# define libc_feholdsetround_noex_ctx default_libc_feholdsetround_noex_ctx
+# define libc_feresetround_noex_ctx default_libc_feresetround_noex_ctx
+
+# define libc_feholdsetroundf_ctx libc_feholdsetround_ctx
+# define libc_feholdsetroundl_ctx libc_feholdsetround_ctx
+# define libc_feresetroundf_ctx libc_feresetround_ctx
+# define libc_feresetroundl_ctx libc_feresetround_ctx
+
+# define libc_feholdsetround_noexf_ctx libc_feholdsetround_noex_ctx
+# define libc_feholdsetround_noexl_ctx libc_feholdsetround_noex_ctx
+# define libc_feresetround_noexf_ctx libc_feresetround_noex_ctx
+# define libc_feresetround_noexl_ctx libc_feresetround_noex_ctx
+
+#endif
+
+#ifndef libc_feholdsetround_53bit_ctx
+# define libc_feholdsetround_53bit_ctx libc_feholdsetround_ctx
+#endif
+#ifndef libc_feresetround_53bit_ctx
+# define libc_feresetround_53bit_ctx libc_feresetround_ctx
+#endif
+
+#define SET_RESTORE_ROUND_GENERIC(RM,ROUNDFUNC,CLEANUPFUNC) \
+ struct rm_ctx ctx __attribute__((cleanup (CLEANUPFUNC ## _ctx))); \
+ ROUNDFUNC ## _ctx (&ctx, (RM))
+
+/* Set the rounding mode within a lexical block. Restore the rounding mode to
+ the value at the start of the block. The exception mode must be preserved.
+ Exceptions raised within the block must be set in the exception flags.
+ Non-stop mode may be enabled inside the block. */
+
+#define SET_RESTORE_ROUND(RM) \
+ SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround, libc_feresetround)
+#define SET_RESTORE_ROUNDF(RM) \
+ SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetroundf, libc_feresetroundf)
+#define SET_RESTORE_ROUNDL(RM) \
+ SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetroundl, libc_feresetroundl)
+
+/* Set the rounding mode within a lexical block. Restore the rounding mode to
+ the value at the start of the block. The exception mode must be preserved.
+ Exceptions raised within the block must be discarded, and exception flags
+ are restored to the value at the start of the block.
+ Non-stop mode must be enabled inside the block. */
+
+#define SET_RESTORE_ROUND_NOEX(RM) \
+ SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround_noex, \
+ libc_feresetround_noex)
+#define SET_RESTORE_ROUND_NOEXF(RM) \
+ SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround_noexf, \
+ libc_feresetround_noexf)
+#define SET_RESTORE_ROUND_NOEXL(RM) \
+ SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround_noexl, \
+ libc_feresetround_noexl)
+
+/* Like SET_RESTORE_ROUND, but also set rounding precision to 53 bits. */
+#define SET_RESTORE_ROUND_53BIT(RM) \
+ SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround_53bit, \
+ libc_feresetround_53bit)
+
+#endif /* fenv_private.h. */
diff --git a/libm/arc/fesetenv.c b/libm/arc/fesetenv.c
new file mode 100644
index 000000000..59ec3b722
--- /dev/null
+++ b/libm/arc/fesetenv.c
@@ -0,0 +1,44 @@
+/* Install given floating-point environment (does not raise exceptions).
+ Copyright (C) 2020-2025 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
+fesetenv (const fenv_t *envp)
+{
+ unsigned int fpcr;
+ unsigned int fpsr;
+
+ if (envp == FE_DFL_ENV)
+ {
+ fpcr = _FPU_DEFAULT;
+ fpsr = _FPU_FPSR_DEFAULT;
+ }
+ else
+ {
+ /* No need to mask out reserved bits as they are IoW. */
+ fpcr = envp->__fpcr;
+ fpsr = envp->__fpsr;
+ }
+
+ _FPU_SETCW (fpcr);
+ _FPU_SETS (fpsr);
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/arc/fesetexcept.c b/libm/arc/fesetexcept.c
new file mode 100644
index 000000000..3756a2e09
--- /dev/null
+++ b/libm/arc/fesetexcept.c
@@ -0,0 +1,31 @@
+/* Set given exception flags.
+ Copyright (C) 2020-2025 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)
+{
+ unsigned int fpsr;
+
+ _FPU_GETS (fpsr);
+ fpsr |= excepts;
+ _FPU_SETS (fpsr);
+
+ return 0;
+}
diff --git a/libm/arc/fesetmode.c b/libm/arc/fesetmode.c
new file mode 100644
index 000000000..1fc2bdf12
--- /dev/null
+++ b/libm/arc/fesetmode.c
@@ -0,0 +1,39 @@
+/* Install given floating-point control modes.
+ Copyright (C) 2020-2025 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)
+{
+ unsigned int fpcr;
+
+ if (modep == FE_DFL_MODE)
+ {
+ fpcr = _FPU_DEFAULT;
+ }
+ else
+ {
+ /* No need to mask out reserved bits as they are IoW. */
+ fpcr = *modep;
+ }
+
+ _FPU_SETCW (fpcr);
+
+ return 0;
+}
diff --git a/libm/arc/fesetround.c b/libm/arc/fesetround.c
new file mode 100644
index 000000000..e156e9cf5
--- /dev/null
+++ b/libm/arc/fesetround.c
@@ -0,0 +1,36 @@
+/* Set current rounding direction.
+ Copyright (C) 2020-2025 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)
+{
+ unsigned int fpcr;
+
+ _FPU_GETCW (fpcr);
+
+ if (((fpcr >> __FPU_RND_SHIFT) & __FPU_RND_MASK) != round)
+ {
+ fpcr &= ~(__FPU_RND_MASK << __FPU_RND_SHIFT);
+ fpcr |= (round & __FPU_RND_MASK) << __FPU_RND_SHIFT;
+ _FPU_SETCW (fpcr);
+ }
+
+ return 0;
+}
diff --git a/libm/arc/feupdateenv.c b/libm/arc/feupdateenv.c
new file mode 100644
index 000000000..6a59b2bfe
--- /dev/null
+++ b/libm/arc/feupdateenv.c
@@ -0,0 +1,47 @@
+/* Install given floating-point environment and raise exceptions,
+ without clearing currently raised exceptions.
+ Copyright (C) 2020-2025 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
+feupdateenv (const fenv_t *envp)
+{
+ unsigned int fpcr;
+ unsigned int fpsr;
+
+ _FPU_GETS (fpsr);
+
+ if (envp == FE_DFL_ENV)
+ {
+ fpcr = _FPU_DEFAULT;
+ }
+ else
+ {
+ fpcr = envp->__fpcr;
+
+ /* currently raised exceptions need to be preserved. */
+ fpsr |= envp->__fpsr;
+ }
+
+ _FPU_SETCW (fpcr);
+ _FPU_SETS (fpsr);
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/arc/fgetexcptflg.c b/libm/arc/fgetexcptflg.c
new file mode 100644
index 000000000..03f97f99f
--- /dev/null
+++ b/libm/arc/fgetexcptflg.c
@@ -0,0 +1,30 @@
+/* Store current representation for exceptions, ARC version.
+ Copyright (C) 2020-2025 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)
+{
+ unsigned int fpsr;
+
+ _FPU_GETS (fpsr);
+ *flagp = fpsr & excepts;
+
+ return 0;
+}
diff --git a/libm/arc/fraiseexcpt.c b/libm/arc/fraiseexcpt.c
new file mode 100644
index 000000000..2ff5e0269
--- /dev/null
+++ b/libm/arc/fraiseexcpt.c
@@ -0,0 +1,35 @@
+/* Raise given exceptions.
+ Copyright (C) 2020-2025 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)
+{
+ unsigned int fpsr;
+
+ /* currently raised exceptions are not cleared. */
+ _FPU_GETS (fpsr);
+ fpsr |= excepts;
+
+ _FPU_SETS (fpsr);
+
+ return 0;
+}
diff --git a/libm/arc/fsetexcptflg.c b/libm/arc/fsetexcptflg.c
new file mode 100644
index 000000000..97ff20fff
--- /dev/null
+++ b/libm/arc/fsetexcptflg.c
@@ -0,0 +1,37 @@
+/* Set floating-point environment exception handling, ARC version.
+ Copyright (C) 2020-2025 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)
+{
+ unsigned int fpsr;
+
+ _FPU_GETS (fpsr);
+
+ /* Clear the bits first. */
+ fpsr &= ~excepts;
+
+ /* Now set those bits, copying them over from @flagp. */
+ fpsr |= *flagp & excepts;
+
+ _FPU_SETS (fpsr);
+
+ return 0;
+}
diff --git a/libm/arc/ftestexcept.c b/libm/arc/ftestexcept.c
new file mode 100644
index 000000000..ccc557e5e
--- /dev/null
+++ b/libm/arc/ftestexcept.c
@@ -0,0 +1,31 @@
+/* Test exception in current environment.
+ Copyright (C) 2020-2025 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 "fenv_private.h"
+#include <stdio.h>
+
+int
+fetestexcept (int excepts)
+{
+ unsigned int fpsr;
+
+ _FPU_GETS (fpsr);
+
+ return fpsr & excepts;
+}
diff --git a/libm/arc/get-rounding-mode.h b/libm/arc/get-rounding-mode.h
new file mode 100644
index 000000000..d1bf3475d
--- /dev/null
+++ b/libm/arc/get-rounding-mode.h
@@ -0,0 +1,37 @@
+/* Determine floating-point rounding mode within libc. ARC version.
+ Copyright (C) 2020-2025 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 _ARC_GET_ROUNDING_MODE_H
+#define _ARC_GET_ROUNDING_MODE_H 1
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+static inline int
+get_rounding_mode (void)
+{
+#if defined(__ARC_FPU_SP__) || defined(__ARC_FPU_DP__)
+ unsigned int fpcr;
+ _FPU_GETCW (fpcr);
+
+ return (fpcr >> __FPU_RND_SHIFT) & __FPU_RND_MASK;
+#else
+ return FE_TONEAREST;
+#endif
+}
+
+#endif /* get-rounding-mode.h */
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-28 14:46:33 +0000