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authorVincent Ren-Wei Chen <vincentc@andestech.com>2017-01-17 07:31:24 +0100
committerWaldemar Brodkorb <wbx@openadk.org>2017-01-22 10:06:29 +0100
commit6af3332a4cbd1ffbc81f74759ef7c5e1a87d2e10 (patch)
tree4deae5f23fd1e2664f21c09dfb57fda799dffd10 /libm/nds32/feholdexcpt.c
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/nds32/feholdexcpt.c')
-rw-r--r--libm/nds32/feholdexcpt.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/libm/nds32/feholdexcpt.c b/libm/nds32/feholdexcpt.c
new file mode 100644
index 000000000..4ea3679f5
--- /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
+}
+