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authorVincent Ren-Wei Chen <vincentc@andestech.com>2017-01-17 06:31:24 (GMT)
committerWaldemar Brodkorb <wbx@openadk.org>2017-01-22 09:06:29 (GMT)
commit6af3332a4cbd1ffbc81f74759ef7c5e1a87d2e10 (patch)
tree4deae5f23fd1e2664f21c09dfb57fda799dffd10 /libm
parent82af21a60bc6e53dd92c1c140f20179d2ae4ad40 (diff)
nds32: add NPTL/TLS, *context function, libm changes and code cleanup
This commit includes following features. 1. Support NPTL/TLS 2. Add libm function which is used to handle FP rounding and excpetions (ex: fclrexcpt,fedisblxcpti,feenablxcpt... ) 3. Add *context function for operating user context (ex: setcontext,getcontext,makecontext... ) 4. Change the return flow from signal handler 5. Cleanup of old code The testsuite only has 2 errors, tst-cpuclock1 and tst-cputimer1, which are related to timing accuracy. (math and locale tests are disabled) Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com>
Diffstat (limited to 'libm')
-rw-r--r--libm/nds32/Makefile.arch16
-rw-r--r--libm/nds32/e_sqrt.c34
-rw-r--r--libm/nds32/fclrexcpt.c52
-rw-r--r--libm/nds32/fedisblxcpt.c49
-rw-r--r--libm/nds32/feenablxcpt.c50
-rw-r--r--libm/nds32/fegetenv.c40
-rw-r--r--libm/nds32/fegetexcept.c41
-rw-r--r--libm/nds32/fegetround.c40
-rw-r--r--libm/nds32/feholdexcpt.c51
-rw-r--r--libm/nds32/fenv_libc.h33
-rw-r--r--libm/nds32/fesetenv.c51
-rw-r--r--libm/nds32/fesetround.c42
-rw-r--r--libm/nds32/feupdateenv.c48
-rw-r--r--libm/nds32/fgetexcptflg.c44
-rw-r--r--libm/nds32/fraiseexcpt.c104
-rw-r--r--libm/nds32/fsetexcptflg.c48
-rw-r--r--libm/nds32/ftestexcept.c40
17 files changed, 783 insertions, 0 deletions
diff --git a/libm/nds32/Makefile.arch b/libm/nds32/Makefile.arch
new file mode 100644
index 0000000..bd38690
--- /dev/null
+++ b/libm/nds32/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/nds32/e_sqrt.c b/libm/nds32/e_sqrt.c
new file mode 100644
index 0000000..c737e10
--- /dev/null
+++ b/libm/nds32/e_sqrt.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 2002-2013 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
+ <http://www.gnu.org/licenses/>. */
+
+#if defined(__NDS32_ABI_2FP_PLUS__) && defined(__NDS32_EXT_FPU_DP__)
+
+double __ieee754_sqrt (double x)
+{
+ double z;
+ __asm__ ("fsqrtd %0,%1" : "=f" (z) : "f" (x));
+ return z;
+}
+strong_alias(__ieee754_sqrt, sqrt)
+libm_hidden_def(sqrt)
+#else
+#include <libm/e_sqrt.c>
+#endif
diff --git a/libm/nds32/fclrexcpt.c b/libm/nds32/fclrexcpt.c
new file mode 100644
index 0000000..938f15a
--- /dev/null
+++ b/libm/nds32/fclrexcpt.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Clear given exceptions in current floating-point environment.
+ Copyright (C) 1997-2013 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include "fenv_libc.h"
+#include <fpu_control.h>
+
+
+int
+feclearexcept (int excepts)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ unsigned long int temp;
+
+ /* Mask out unsupported bits/exceptions. */
+ excepts &= FE_ALL_EXCEPT;
+
+ /* Get the current floating point status. */
+ _FPU_GETCW (temp);
+
+ /* Clear the relevant bits. */
+ temp &= ~excepts;
+
+ /* Put the new data in effect. */
+ _FPU_SETCW (temp);
+
+ /* Success. */
+ return 0;
+#else
+ /* Unsupported, so fail unless nothing needs to be done. */
+ return (excepts != 0);
+#endif
+}
diff --git a/libm/nds32/fedisblxcpt.c b/libm/nds32/fedisblxcpt.c
new file mode 100644
index 0000000..bbb6d54
--- /dev/null
+++ b/libm/nds32/fedisblxcpt.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Disable floating-point exceptions.
+ Copyright (C) 2001-2013 Free Software Foundation, Inc.
+ Contributed by Philip Blundell <philb@gnu.org>, 2001.
+
+ 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 <fenv.h>
+#include "fenv_libc.h"
+#include <fpu_control.h>
+
+int
+fedisableexcept (int excepts)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ unsigned long int new_exc, old_exc;
+
+ _FPU_GETCW(new_exc);
+
+ old_exc = (new_exc & ENABLE_MASK) >> ENABLE_SHIFT;
+
+ excepts &= FE_ALL_EXCEPT;
+
+ new_exc &= ~(excepts << ENABLE_SHIFT);
+ new_exc &= ~_FPU_RESERVED;
+ _FPU_SETCW (new_exc);
+
+ return old_exc;
+#else
+ /* Unsupported, so return -1 for failure. */
+ return -1;
+#endif
+}
diff --git a/libm/nds32/feenablxcpt.c b/libm/nds32/feenablxcpt.c
new file mode 100644
index 0000000..14aef98
--- /dev/null
+++ b/libm/nds32/feenablxcpt.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Enable floating-point exceptions.
+ Copyright (C) 2001-2013 Free Software Foundation, Inc.
+ Contributed by Philip Blundell <philb@gnu.org>, 2001.
+
+ 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 <fenv.h>
+#include "fenv_libc.h"
+#include <fpu_control.h>
+
+int
+feenableexcept (int excepts)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ unsigned long int new_exc, old_exc;
+
+ _FPU_GETCW(new_exc);
+
+ old_exc = (new_exc & ENABLE_MASK) >> ENABLE_SHIFT;
+
+ excepts &= FE_ALL_EXCEPT;
+
+ new_exc |= (excepts << ENABLE_SHIFT);
+ new_exc &= ~_FPU_RESERVED;
+
+ _FPU_SETCW(new_exc);
+
+ return old_exc;
+#else
+ /* Unsupported, so return -1 for failure. */
+ return -1;
+#endif
+}
diff --git a/libm/nds32/fegetenv.c b/libm/nds32/fegetenv.c
new file mode 100644
index 0000000..782cf79
--- /dev/null
+++ b/libm/nds32/fegetenv.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Store current floating-point environment.
+ Copyright (C) 1997-2013 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetenv (fenv_t *envp)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ unsigned long int temp;
+ _FPU_GETCW (temp);
+ envp->__fpcsr = temp;
+
+ /* Success. */
+ return 0;
+#else
+ /* Unsupported, so fail. */
+ return 1;
+#endif
+}
diff --git a/libm/nds32/fegetexcept.c b/libm/nds32/fegetexcept.c
new file mode 100644
index 0000000..1ffe361
--- /dev/null
+++ b/libm/nds32/fegetexcept.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Get floating-point exceptions.
+ Copyright (C) 2001-2013 Free Software Foundation, Inc.
+ Contributed by Philip Blundell <philb@gnu.org>, 2001
+
+ 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 <fenv.h>
+#include "fenv_libc.h"
+#include <fpu_control.h>
+
+int
+fegetexcept (void)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ unsigned long temp;
+
+ _FPU_GETCW (temp);
+
+ return (temp & ENABLE_MASK) >> ENABLE_SHIFT;
+#else
+ /* Unsupported. Return all exceptions disabled. */
+ return 0;
+#endif
+}
diff --git a/libm/nds32/fegetround.c b/libm/nds32/fegetround.c
new file mode 100644
index 0000000..e4e70ea
--- /dev/null
+++ b/libm/nds32/fegetround.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Return current rounding direction.
+ Copyright (C) 2004-2013 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetround (void)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ unsigned int temp;
+
+ /* Get the current environment. */
+ _FPU_GETCW (temp);
+
+ return temp & 0x3;
+#else
+ /* The current soft-float implementation only handles TONEAREST. */
+ return FE_TONEAREST;
+#endif
+}
diff --git a/libm/nds32/feholdexcpt.c b/libm/nds32/feholdexcpt.c
new file mode 100644
index 0000000..4ea3679
--- /dev/null
+++ b/libm/nds32/feholdexcpt.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Store current floating-point environment and clear exceptions.
+ Copyright (C) 1997-2013 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include <fpu_control.h>
+#include "fenv_libc.h"
+
+int
+feholdexcept (fenv_t *envp)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ unsigned long int temp;
+
+ /* Store the environment. */
+ _FPU_GETCW(temp);
+ envp->__fpcsr = temp;
+
+ /* Now set all exceptions to non-stop. */
+ temp &= ~(FE_ALL_EXCEPT << ENABLE_SHIFT);
+
+ /* And clear all exception flags. */
+ temp &= ~FE_ALL_EXCEPT;
+
+ _FPU_SETCW(temp);
+
+ return 0;
+#else
+ /* Unsupported, so fail. */
+ return 1;
+#endif
+}
+
diff --git a/libm/nds32/fenv_libc.h b/libm/nds32/fenv_libc.h
new file mode 100644
index 0000000..a76f131
--- /dev/null
+++ b/libm/nds32/fenv_libc.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 2000-2013 Free Software Foundation, Inc.
+ Contributed by Alexandre Oliva <aoliva@redhat.com>
+ based on the corresponding file in the mips port.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _FENV_LIBC_H
+#define _FENV_LIBC_H
+
+/* Mask for enabling exceptions and for the CAUSE bits. */
+#define ENABLE_MASK 0x00F80U
+
+/* Shift for FE_* flags to get up to the ENABLE bits. */
+#define ENABLE_SHIFT 5
+
+#endif /* _FENV_LIBC_H */
diff --git a/libm/nds32/fesetenv.c b/libm/nds32/fesetenv.c
new file mode 100644
index 0000000..4682d3c
--- /dev/null
+++ b/libm/nds32/fesetenv.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Install given floating-point environment.
+ Copyright (C) 2004-2013 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetenv (const fenv_t *envp)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ unsigned int temp;
+
+ _FPU_GETCW (temp);
+ temp &= _FPU_RESERVED;
+
+ if (envp == FE_DFL_ENV)
+ temp |= _FPU_DEFAULT;
+ else if (envp == FE_NOMASK_ENV)
+ temp |= _FPU_IEEE;
+ else
+ temp |= envp->__fpcsr & ~_FPU_RESERVED;
+
+ _FPU_SETCW (temp);
+
+ /* Success. */
+ return 0;
+#else
+
+ /* Unsupported, so fail. */
+ return 1;
+#endif
+}
diff --git a/libm/nds32/fesetround.c b/libm/nds32/fesetround.c
new file mode 100644
index 0000000..012a5bf
--- /dev/null
+++ b/libm/nds32/fesetround.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Set current rounding direction.
+ Copyright (C) 2004-2013 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetround (int round)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ fpu_control_t temp;
+ if ((round & ~0x3) != 0)
+ /* ROUND is no valid rounding mode. */
+ return 1;
+
+ _FPU_GETCW (temp);
+ temp = (temp & ~0x3) | round;
+ _FPU_SETCW (temp);
+ return 0;
+#else
+ return (round != FE_TONEAREST);
+#endif
+}
diff --git a/libm/nds32/feupdateenv.c b/libm/nds32/feupdateenv.c
new file mode 100644
index 0000000..d58c900
--- /dev/null
+++ b/libm/nds32/feupdateenv.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Install given floating-point environment and raise exceptions.
+ Copyright (C) 1997-2013 Free Software Foundation, Inc.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+feupdateenv (const fenv_t *envp)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ unsigned int temp;
+
+ /* Get the current exception state. */
+ _FPU_GETCW (temp);
+
+ /* Install new environment. */
+ fesetenv (envp);
+
+ /* Raise the saved exceptions. */
+ feraiseexcept (temp & FE_ALL_EXCEPT);
+
+ /* Success. */
+ return 0;
+#else
+ /* Unsupported, so fail. */
+ return 1;
+#endif
+}
diff --git a/libm/nds32/fgetexcptflg.c b/libm/nds32/fgetexcptflg.c
new file mode 100644
index 0000000..e446c42
--- /dev/null
+++ b/libm/nds32/fgetexcptflg.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Store current representation for exceptions.
+ Copyright (C) 1997-2013 Free Software Foundation, Inc.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+ 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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetexceptflag (fexcept_t *flagp, int excepts)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ fpu_control_t temp;
+
+ /* Get the current exceptions. */
+ _FPU_GETCW (temp);
+
+ *flagp = temp & excepts & FE_ALL_EXCEPT;
+
+ /* Success. */
+ return 0;
+#else
+ /* Unsupported, so fail. */
+ return 1;
+#endif
+}
diff --git a/libm/nds32/fraiseexcpt.c b/libm/nds32/fraiseexcpt.c
new file mode 100644
index 0000000..d194211
--- /dev/null
+++ b/libm/nds32/fraiseexcpt.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Raise given exceptions.
+ Copyright (C) 2004-2013 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <fpu_control.h>
+#include <fenv.h>
+#include <float.h>
+#include "fenv_libc.h"
+
+int
+feraiseexcept (int excepts)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ float temp1 = 0.0, temp2 = 1.0;
+ if (FE_INVALID & excepts)
+ {
+ __asm__ volatile(
+ "fmtsr\t %0, $fs0\n\t"
+ "fdivs\t $fs0, $fs0, $fs0\n\t"
+ :
+ :"r"(temp1)
+ :"$fs0"
+ );
+ }
+ if (FE_DIVBYZERO & excepts)
+ {
+ __asm__ volatile(
+ "fmtsr\t %0, $fs0\n\t"
+ "fmtsr\t %1, $fs1\n\t"
+ "fdivs\t $fs0, $fs1, $fs0\n\t"
+ :
+ :"r"(temp1),"r"(temp2)
+ :"$fs0"
+ );
+ }
+ if (FE_OVERFLOW & excepts)
+ {
+ /* There's no way to raise overflow without also raising inexact.
+ */
+ unsigned int fpcsr;
+ temp1 = FLT_MAX;
+ __asm__ volatile(
+ "fmfcsr\t %0\n\t"
+ "fmtsr\t %1, $fs0\n\t"
+ "fadds\t $fs0, $fs0, $fs0\n\t"
+ "ori\t %0,%0,0x10\n\t"
+ "fmtcsr\t %0\n\t"
+ :"=&r"(fpcsr)
+ :"r"(temp1)
+ :"$fs0"
+ );
+ }
+ if (FE_UNDERFLOW & excepts)
+ {
+ /* There's no way to raise overflow without also raising inexact.
+ */
+ temp1 = FLT_MIN;
+ temp2 = 2.0;
+ __asm__ volatile(
+ "fmtsr\t %0, $fs0\n\t"
+ "fmtsr\t %1, $fs1\n\t"
+ "fdivs\t $fs1, $fs0, $fs1\n\t"
+ :
+ :"r"(temp1),"r"(temp2)
+ :"$fs0","$fs1"
+ );
+ }
+ if (FE_INEXACT & excepts)
+ {
+ temp1 = 3.0;
+ __asm__ volatile(
+ "fmtsr\t %0, $fs1\n\t"
+ "fmtsr\t %1, $fs0\n\t"
+ "fdivs\t $fs1, $fs0, $fs1\n\t"
+ :
+ :"r"(temp1),"r"(temp2)
+ :"$fs0","$fs1"
+ );
+ }
+
+ return 0;
+
+#endif
+ /* Unsupported, so fail unless nothing needs to be done. */
+ return (excepts != 0);
+}
diff --git a/libm/nds32/fsetexcptflg.c b/libm/nds32/fsetexcptflg.c
new file mode 100644
index 0000000..7da943b
--- /dev/null
+++ b/libm/nds32/fsetexcptflg.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Set floating-point environment exception handling.
+ Copyright (C) 1997-2013 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetexceptflag (const fexcept_t *flagp, int excepts)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ fexcept_t temp;
+
+ /* Get the current environment. */
+ _FPU_GETCW (temp);
+
+ /* Set the desired exception mask. */
+ temp &= ~(excepts & FE_ALL_EXCEPT);
+ temp |= (*flagp & excepts & FE_ALL_EXCEPT);
+
+ /* Save state back to the FPU. */
+ _FPU_SETCW (temp);
+
+ /* Success. */
+ return 0;
+#else
+ /* Unsupported, so fail unless nothing needs to be done. */
+ return (excepts != 0);
+#endif
+}
diff --git a/libm/nds32/ftestexcept.c b/libm/nds32/ftestexcept.c
new file mode 100644
index 0000000..8257b6f
--- /dev/null
+++ b/libm/nds32/ftestexcept.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Test exception in current environment.
+ Copyright (C) 1997-2013 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fetestexcept (int excepts)
+{
+#ifdef __NDS32_ABI_2FP_PLUS__
+ fexcept_t temp;
+
+ /* Get current exceptions. */
+ _FPU_GETCW(temp);
+
+ return temp & excepts & FE_ALL_EXCEPT;
+#else
+ /* Unsupported, return 0. */
+ return 0;
+#endif
+}