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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2017-12-03 20:12:34 (GMT)
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2017-12-03 20:12:34 (GMT)
commitedce88cfef2f2a62647c2ab9536ca29694fab292 (patch)
tree5cfc13c44a91bb8b983ee137de38e136289db81e /libm
parentc69db851309995c525b3993a10dc13dabdeb7b33 (diff)
x86_64: add fenv support from glibc
Diffstat (limited to 'libm')
-rw-r--r--libm/x86_64/Makefile.arch24
-rw-r--r--libm/x86_64/fclrexcpt.c50
-rw-r--r--libm/x86_64/fedisblxcpt.c45
-rw-r--r--libm/x86_64/feenablxcpt.c45
-rw-r--r--libm/x86_64/fegetenv.c31
-rw-r--r--libm/x86_64/fegetexcept.c30
-rw-r--r--libm/x86_64/fegetmode.c27
-rw-r--r--libm/x86_64/fegetround.c31
-rw-r--r--libm/x86_64/feholdexcpt.c37
-rw-r--r--libm/x86_64/fesetenv.c112
-rw-r--r--libm/x86_64/fesetexcept.c30
-rw-r--r--libm/x86_64/fesetmode.c49
-rw-r--r--libm/x86_64/fesetround.c44
-rw-r--r--libm/x86_64/feupdateenv.c41
-rw-r--r--libm/x86_64/fgetexcptflg.c34
-rw-r--r--libm/x86_64/fraiseexcpt.c117
-rw-r--r--libm/x86_64/fsetexcptflg.c52
-rw-r--r--libm/x86_64/ftestexcept.c31
18 files changed, 830 insertions, 0 deletions
diff --git a/libm/x86_64/Makefile.arch b/libm/x86_64/Makefile.arch
new file mode 100644
index 0000000..e1be961
--- /dev/null
+++ b/libm/x86_64/Makefile.arch
@@ -0,0 +1,24 @@
+# Makefile for uClibc
+#
+# Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org>
+#
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+#
+# The routines included in this math library are derived from
+# glibc's libm.
+#
+
+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/x86_64/fclrexcpt.c b/libm/x86_64/fclrexcpt.c
new file mode 100644
index 0000000..ddd4d73
--- /dev/null
+++ b/libm/x86_64/fclrexcpt.c
@@ -0,0 +1,50 @@
+/* Clear given exceptions in current floating-point environment.
+ Copyright (C) 2001-2017 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>
+
+int
+feclearexcept (int excepts)
+{
+ fenv_t temp;
+ unsigned int mxcsr;
+
+ /* Mask out unsupported bits/exceptions. */
+ excepts &= FE_ALL_EXCEPT;
+
+ /* Bah, we have to clear selected exceptions. Since there is no
+ `fldsw' instruction we have to do it the hard way. */
+ __asm__ ("fnstenv %0" : "=m" (*&temp));
+
+ /* Clear the relevant bits. */
+ temp.__status_word &= excepts ^ FE_ALL_EXCEPT;
+
+ /* Put the new data in effect. */
+ __asm__ ("fldenv %0" : : "m" (*&temp));
+
+ /* And the same procedure for SSE. */
+ __asm__ ("stmxcsr %0" : "=m" (*&mxcsr));
+
+ /* Clear the relevant bits. */
+ mxcsr &= ~excepts;
+
+ /* And put them into effect. */
+ __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr));
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/x86_64/fedisblxcpt.c b/libm/x86_64/fedisblxcpt.c
new file mode 100644
index 0000000..16dd196
--- /dev/null
+++ b/libm/x86_64/fedisblxcpt.c
@@ -0,0 +1,45 @@
+/* Disable floating-point exceptions.
+ Copyright (C) 2001-2017 Free Software Foundation, Inc.
+ Contributed by Andreas Jaeger <aj@suse.de>, 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>
+
+int
+fedisableexcept (int excepts)
+{
+ unsigned short int new_exc, old_exc;
+ unsigned int new;
+
+ excepts &= FE_ALL_EXCEPT;
+
+ /* Get the current control word of the x87 FPU. */
+ __asm__ ("fstcw %0" : "=m" (*&new_exc));
+
+ old_exc = (~new_exc) & FE_ALL_EXCEPT;
+
+ new_exc |= excepts;
+ __asm__ ("fldcw %0" : : "m" (*&new_exc));
+
+ /* And now the same for the SSE MXCSR register. */
+ __asm__ ("stmxcsr %0" : "=m" (*&new));
+
+ /* The SSE exception masks are shifted by 7 bits. */
+ new |= excepts << 7;
+ __asm__ ("ldmxcsr %0" : : "m" (*&new));
+
+ return old_exc;
+}
diff --git a/libm/x86_64/feenablxcpt.c b/libm/x86_64/feenablxcpt.c
new file mode 100644
index 0000000..8f5a3dd
--- /dev/null
+++ b/libm/x86_64/feenablxcpt.c
@@ -0,0 +1,45 @@
+/* Enable floating-point exceptions.
+ Copyright (C) 2001-2017 Free Software Foundation, Inc.
+ Contributed by Andreas Jaeger <aj@suse.de>, 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>
+
+int
+feenableexcept (int excepts)
+{
+ unsigned short int new_exc, old_exc;
+ unsigned int new;
+
+ excepts &= FE_ALL_EXCEPT;
+
+ /* Get the current control word of the x87 FPU. */
+ __asm__ ("fstcw %0" : "=m" (*&new_exc));
+
+ old_exc = (~new_exc) & FE_ALL_EXCEPT;
+
+ new_exc &= ~excepts;
+ __asm__ ("fldcw %0" : : "m" (*&new_exc));
+
+ /* And now the same for the SSE MXCSR register. */
+ __asm__ ("stmxcsr %0" : "=m" (*&new));
+
+ /* The SSE exception masks are shifted by 7 bits. */
+ new &= ~(excepts << 7);
+ __asm__ ("ldmxcsr %0" : : "m" (*&new));
+
+ return old_exc;
+}
diff --git a/libm/x86_64/fegetenv.c b/libm/x86_64/fegetenv.c
new file mode 100644
index 0000000..1e362cc
--- /dev/null
+++ b/libm/x86_64/fegetenv.c
@@ -0,0 +1,31 @@
+/* Store current floating-point environment.
+ Copyright (C) 2001-2017 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>
+
+int
+fegetenv (fenv_t *envp)
+{
+ __asm__ ("fnstenv %0\n"
+ /* fnstenv changes the exception mask, so load back the
+ stored environment. */
+ "fldenv %0\n"
+ "stmxcsr %1" : "=m" (*envp), "=m" (envp->__mxcsr));
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/x86_64/fegetexcept.c b/libm/x86_64/fegetexcept.c
new file mode 100644
index 0000000..6e73f00
--- /dev/null
+++ b/libm/x86_64/fegetexcept.c
@@ -0,0 +1,30 @@
+/* Get enabled floating-point exceptions.
+ Copyright (C) 2001-2017 Free Software Foundation, Inc.
+ Contributed by Andreas Jaeger <aj@suse.de>, 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>
+
+int
+fegetexcept (void)
+{
+ unsigned short int exc;
+
+ /* Get the current control word. */
+ __asm__ ("fstcw %0" : "=m" (*&exc));
+
+ return (~exc) & FE_ALL_EXCEPT;
+}
diff --git a/libm/x86_64/fegetmode.c b/libm/x86_64/fegetmode.c
new file mode 100644
index 0000000..050a536
--- /dev/null
+++ b/libm/x86_64/fegetmode.c
@@ -0,0 +1,27 @@
+/* Store current floating-point control modes. x86_64 version.
+ Copyright (C) 2016-2017 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
+fegetmode (femode_t *modep)
+{
+ _FPU_GETCW (modep->__control_word);
+ __asm__ ("stmxcsr %0" : "=m" (modep->__mxcsr));
+ return 0;
+}
diff --git a/libm/x86_64/fegetround.c b/libm/x86_64/fegetround.c
new file mode 100644
index 0000000..d0ca106
--- /dev/null
+++ b/libm/x86_64/fegetround.c
@@ -0,0 +1,31 @@
+/* Return current rounding direction.
+ Copyright (C) 1997-2017 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>
+
+int
+fegetround (void)
+{
+ int cw;
+ /* We only check the x87 FPU unit. The SSE unit should be the same
+ - and if it's not the same there's no way to signal it. */
+
+ __asm__ ("fnstcw %0" : "=m" (*&cw));
+
+ return cw & 0xc00;
+}
diff --git a/libm/x86_64/feholdexcpt.c b/libm/x86_64/feholdexcpt.c
new file mode 100644
index 0000000..917e5f8
--- /dev/null
+++ b/libm/x86_64/feholdexcpt.c
@@ -0,0 +1,37 @@
+/* Store current floating-point environment and clear exceptions.
+ Copyright (C) 2001-2017 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>
+
+int
+feholdexcept (fenv_t *envp)
+{
+ unsigned int mxcsr;
+
+ /* Store the environment. Recall that fnstenv has a side effect of
+ masking all exceptions. Then clear all exceptions. */
+ __asm__ ("fnstenv %0\n\t"
+ "stmxcsr %1\n\t"
+ "fnclex"
+ : "=m" (*envp), "=m" (envp->__mxcsr));
+
+ /* Set the SSE MXCSR register. */
+ mxcsr = (envp->__mxcsr | 0x1f80) & ~0x3f;
+ __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr));
+
+ return 0;
+}
diff --git a/libm/x86_64/fesetenv.c b/libm/x86_64/fesetenv.c
new file mode 100644
index 0000000..d194ee8
--- /dev/null
+++ b/libm/x86_64/fesetenv.c
@@ -0,0 +1,112 @@
+/* Install given floating-point environment.
+ Copyright (C) 2001-2017 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 <assert.h>
+
+libm_hidden_proto(fesetenv)
+
+/* All exceptions, including the x86-specific "denormal operand"
+ exception. */
+#define FE_ALL_EXCEPT_X86 (FE_ALL_EXCEPT | __FE_DENORM)
+
+
+int
+fesetenv (const fenv_t *envp)
+{
+ fenv_t temp;
+
+ /* Install the environment specified by ENVP. But there are a few
+ values which we do not want to come from the saved environment.
+ Therefore, we get the current environment and replace the values
+ we want to use from the environment specified by the parameter. */
+ __asm__ ("fnstenv %0\n"
+ "stmxcsr %1" : "=m" (*&temp), "=m" (*&temp.__mxcsr));
+
+ if (envp == FE_DFL_ENV)
+ {
+ temp.__control_word |= FE_ALL_EXCEPT_X86;
+ temp.__control_word &= ~FE_TOWARDZERO;
+ temp.__control_word |= _FPU_EXTENDED;
+ temp.__status_word &= ~FE_ALL_EXCEPT_X86;
+ temp.__eip = 0;
+ temp.__cs_selector = 0;
+ temp.__opcode = 0;
+ temp.__data_offset = 0;
+ temp.__data_selector = 0;
+ /* Clear SSE exceptions. */
+ temp.__mxcsr &= ~FE_ALL_EXCEPT_X86;
+ /* Set mask for SSE MXCSR. */
+ temp.__mxcsr |= (FE_ALL_EXCEPT_X86 << 7);
+ /* Set rounding to FE_TONEAREST. */
+ temp.__mxcsr &= ~ 0x6000;
+ temp.__mxcsr |= (FE_TONEAREST << 3);
+ /* Clear the FZ and DAZ bits. */
+ temp.__mxcsr &= ~0x8040;
+ }
+ else if (envp == FE_NOMASK_ENV)
+ {
+ temp.__control_word &= ~(FE_ALL_EXCEPT | FE_TOWARDZERO);
+ /* Keep the "denormal operand" exception masked. */
+ temp.__control_word |= __FE_DENORM;
+ temp.__control_word |= _FPU_EXTENDED;
+ temp.__status_word &= ~FE_ALL_EXCEPT_X86;
+ temp.__eip = 0;
+ temp.__cs_selector = 0;
+ temp.__opcode = 0;
+ temp.__data_offset = 0;
+ temp.__data_selector = 0;
+ /* Clear SSE exceptions. */
+ temp.__mxcsr &= ~FE_ALL_EXCEPT_X86;
+ /* Set mask for SSE MXCSR. */
+ /* Set rounding to FE_TONEAREST. */
+ temp.__mxcsr &= ~ 0x6000;
+ temp.__mxcsr |= (FE_TONEAREST << 3);
+ /* Do not mask exceptions. */
+ temp.__mxcsr &= ~(FE_ALL_EXCEPT << 7);
+ /* Keep the "denormal operand" exception masked. */
+ temp.__mxcsr |= (__FE_DENORM << 7);
+ /* Clear the FZ and DAZ bits. */
+ temp.__mxcsr &= ~0x8040;
+ }
+ else
+ {
+ temp.__control_word &= ~(FE_ALL_EXCEPT_X86
+ | FE_TOWARDZERO
+ | _FPU_EXTENDED);
+ temp.__control_word |= (envp->__control_word
+ & (FE_ALL_EXCEPT_X86
+ | FE_TOWARDZERO
+ | _FPU_EXTENDED));
+ temp.__status_word &= ~FE_ALL_EXCEPT_X86;
+ temp.__status_word |= envp->__status_word & FE_ALL_EXCEPT_X86;
+ temp.__eip = envp->__eip;
+ temp.__cs_selector = envp->__cs_selector;
+ temp.__opcode = envp->__opcode;
+ temp.__data_offset = envp->__data_offset;
+ temp.__data_selector = envp->__data_selector;
+ temp.__mxcsr = envp->__mxcsr;
+ }
+
+ __asm__ ("fldenv %0\n"
+ "ldmxcsr %1" : : "m" (temp), "m" (temp.__mxcsr));
+
+ /* Success. */
+ return 0;
+}
+libm_hidden_def(fesetenv)
diff --git a/libm/x86_64/fesetexcept.c b/libm/x86_64/fesetexcept.c
new file mode 100644
index 0000000..ee63c3f
--- /dev/null
+++ b/libm/x86_64/fesetexcept.c
@@ -0,0 +1,30 @@
+/* Set given exception flags. x86_64 version.
+ Copyright (C) 2016-2017 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>
+
+int
+fesetexcept (int excepts)
+{
+ unsigned int mxcsr;
+
+ __asm__ ("stmxcsr %0" : "=m" (*&mxcsr));
+ mxcsr |= excepts & FE_ALL_EXCEPT;
+ __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr));
+
+ return 0;
+}
diff --git a/libm/x86_64/fesetmode.c b/libm/x86_64/fesetmode.c
new file mode 100644
index 0000000..487be97
--- /dev/null
+++ b/libm/x86_64/fesetmode.c
@@ -0,0 +1,49 @@
+/* Install given floating-point control modes. x86_64 version.
+ Copyright (C) 2016-2017 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>
+
+/* All exceptions, including the x86-specific "denormal operand"
+ exception. */
+#define FE_ALL_EXCEPT_X86 (FE_ALL_EXCEPT | __FE_DENORM)
+
+int
+fesetmode (const femode_t *modep)
+{
+ fpu_control_t cw;
+ unsigned int mxcsr;
+ __asm__ ("stmxcsr %0" : "=m" (mxcsr));
+ /* Preserve SSE exception flags but restore other state in
+ MXCSR. */
+ mxcsr &= FE_ALL_EXCEPT_X86;
+ if (modep == FE_DFL_MODE)
+ {
+ cw = _FPU_DEFAULT;
+ /* Default MXCSR state has all bits zero except for those
+ masking exceptions. */
+ mxcsr |= FE_ALL_EXCEPT_X86 << 7;
+ }
+ else
+ {
+ cw = modep->__control_word;
+ mxcsr |= modep->__mxcsr & ~FE_ALL_EXCEPT_X86;
+ }
+ _FPU_SETCW (cw);
+ __asm__ ("ldmxcsr %0" : : "m" (mxcsr));
+ return 0;
+}
diff --git a/libm/x86_64/fesetround.c b/libm/x86_64/fesetround.c
new file mode 100644
index 0000000..312bddf
--- /dev/null
+++ b/libm/x86_64/fesetround.c
@@ -0,0 +1,44 @@
+/* Set current rounding direction.
+ Copyright (C) 2001-2017 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>
+
+int
+fesetround (int round)
+{
+ unsigned short int cw;
+ int mxcsr;
+
+ if ((round & ~0xc00) != 0)
+ /* ROUND is no valid rounding mode. */
+ return 1;
+
+ /* First set the x87 FPU. */
+ __asm__ ("fnstcw %0" : "=m" (*&cw));
+ cw &= ~0xc00;
+ cw |= round;
+ __asm__ ("fldcw %0" : : "m" (*&cw));
+
+ /* And now the MSCSR register for SSE, the precision is at different bit
+ positions in the different units, we need to shift it 3 bits. */
+ __asm__ ("stmxcsr %0" : "=m" (*&mxcsr));
+ mxcsr &= ~ 0x6000;
+ mxcsr |= round << 3;
+ __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr));
+
+ return 0;
+}
diff --git a/libm/x86_64/feupdateenv.c b/libm/x86_64/feupdateenv.c
new file mode 100644
index 0000000..83747ea
--- /dev/null
+++ b/libm/x86_64/feupdateenv.c
@@ -0,0 +1,41 @@
+/* Install given floating-point environment and raise exceptions.
+ Copyright (C) 1997-2017 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>
+
+int
+feupdateenv (const fenv_t *envp)
+{
+ fexcept_t temp;
+ unsigned int xtemp;
+
+ /* Save current exceptions. */
+ __asm__ ("fnstsw %0\n\tstmxcsr %1" : "=m" (*&temp), "=m" (xtemp));
+ temp = (temp | xtemp) & FE_ALL_EXCEPT;
+
+ /* Install new environment. */
+ fesetenv (envp);
+
+ /* Raise the saved exception. Incidently for us the implementation
+ defined format of the values in objects of type fexcept_t is the
+ same as the ones specified using the FE_* constants. */
+ feraiseexcept ((int) temp);
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/x86_64/fgetexcptflg.c b/libm/x86_64/fgetexcptflg.c
new file mode 100644
index 0000000..8732bbd
--- /dev/null
+++ b/libm/x86_64/fgetexcptflg.c
@@ -0,0 +1,34 @@
+/* Store current representation for exceptions.
+ Copyright (C) 2001-2017 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>
+
+int
+fegetexceptflag (fexcept_t *flagp, int excepts)
+{
+ fexcept_t temp;
+ unsigned int mxscr;
+
+ /* Get the current exceptions for the x87 FPU and SSE unit. */
+ __asm__ ("fnstsw %0\n"
+ "stmxcsr %1" : "=m" (*&temp), "=m" (*&mxscr));
+
+ *flagp = (temp | mxscr) & FE_ALL_EXCEPT & excepts;
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/x86_64/fraiseexcpt.c b/libm/x86_64/fraiseexcpt.c
new file mode 100644
index 0000000..524c02a
--- /dev/null
+++ b/libm/x86_64/fraiseexcpt.c
@@ -0,0 +1,117 @@
+/* Raise given exceptions.
+ Copyright (C) 2001-2017 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 <math.h>
+
+int
+feraiseexcept (int excepts)
+{
+ /* Raise exceptions represented by EXPECTS. But we must raise only
+ one signal at a time. It is important that if the overflow/underflow
+ exception and the inexact exception are given at the same time,
+ the overflow/underflow exception follows the inexact exception. */
+
+ /* First: invalid exception. */
+ if ((FE_INVALID & excepts) != 0)
+ {
+ /* One example of an invalid operation is 0.0 / 0.0. */
+ float f = 0.0;
+
+ __asm__ __volatile__ ("divss %0, %0 " : : "x" (f));
+ (void) &f;
+ }
+
+ /* Next: division by zero. */
+ if ((FE_DIVBYZERO & excepts) != 0)
+ {
+ float f = 1.0;
+ float g = 0.0;
+
+ __asm__ __volatile__ ("divss %1, %0" : : "x" (f), "x" (g));
+ (void) &f;
+ }
+
+ /* Next: overflow. */
+ if ((FE_OVERFLOW & excepts) != 0)
+ {
+ /* XXX: Is it ok to only set the x87 FPU? */
+ /* There is no way to raise only the overflow flag. Do it the
+ hard way. */
+ fenv_t temp;
+
+ /* Bah, we have to clear selected exceptions. Since there is no
+ `fldsw' instruction we have to do it the hard way. */
+ __asm__ __volatile__ ("fnstenv %0" : "=m" (*&temp));
+
+ /* Set the relevant bits. */
+ temp.__status_word |= FE_OVERFLOW;
+
+ /* Put the new data in effect. */
+ __asm__ __volatile__ ("fldenv %0" : : "m" (*&temp));
+
+ /* And raise the exception. */
+ __asm__ __volatile__ ("fwait");
+ }
+
+ /* Next: underflow. */
+ if ((FE_UNDERFLOW & excepts) != 0)
+ {
+ /* XXX: Is it ok to only set the x87 FPU? */
+ /* There is no way to raise only the underflow flag. Do it the
+ hard way. */
+ fenv_t temp;
+
+ /* Bah, we have to clear selected exceptions. Since there is no
+ `fldsw' instruction we have to do it the hard way. */
+ __asm__ __volatile__ ("fnstenv %0" : "=m" (*&temp));
+
+ /* Set the relevant bits. */
+ temp.__status_word |= FE_UNDERFLOW;
+
+ /* Put the new data in effect. */
+ __asm__ __volatile__ ("fldenv %0" : : "m" (*&temp));
+
+ /* And raise the exception. */
+ __asm__ __volatile__ ("fwait");
+ }
+
+ /* Last: inexact. */
+ if ((FE_INEXACT & excepts) != 0)
+ {
+ /* XXX: Is it ok to only set the x87 FPU? */
+ /* There is no way to raise only the inexact flag. Do it the
+ hard way. */
+ fenv_t temp;
+
+ /* Bah, we have to clear selected exceptions. Since there is no
+ `fldsw' instruction we have to do it the hard way. */
+ __asm__ __volatile__ ("fnstenv %0" : "=m" (*&temp));
+
+ /* Set the relevant bits. */
+ temp.__status_word |= FE_INEXACT;
+
+ /* Put the new data in effect. */
+ __asm__ __volatile__ ("fldenv %0" : : "m" (*&temp));
+
+ /* And raise the exception. */
+ __asm__ __volatile__ ("fwait");
+ }
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/x86_64/fsetexcptflg.c b/libm/x86_64/fsetexcptflg.c
new file mode 100644
index 0000000..b3f001b
--- /dev/null
+++ b/libm/x86_64/fsetexcptflg.c
@@ -0,0 +1,52 @@
+/* Set floating-point environment exception handling.
+ Copyright (C) 2001-2017 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 <math.h>
+
+int
+fesetexceptflag (const fexcept_t *flagp, int excepts)
+{
+ fenv_t temp;
+ unsigned int mxcsr;
+
+ /* XXX: Do we really need to set both the exception in both units?
+ Shouldn't it be enough to set only the SSE unit? */
+
+ /* Get the current x87 FPU environment. We have to do this since we
+ cannot separately set the status word. */
+ __asm__ ("fnstenv %0" : "=m" (*&temp));
+
+ temp.__status_word &= ~(excepts & FE_ALL_EXCEPT);
+ temp.__status_word |= *flagp & excepts & FE_ALL_EXCEPT;
+
+ /* Store the new status word (along with the rest of the environment.
+ Possibly new exceptions are set but they won't get executed unless
+ the next floating-point instruction. */
+ __asm__ ("fldenv %0" : : "m" (*&temp));
+
+ /* And now the same for SSE. */
+ __asm__ ("stmxcsr %0" : "=m" (*&mxcsr));
+
+ mxcsr &= ~(excepts & FE_ALL_EXCEPT);
+ mxcsr |= *flagp & excepts & FE_ALL_EXCEPT;
+
+ __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr));
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/x86_64/ftestexcept.c b/libm/x86_64/ftestexcept.c
new file mode 100644
index 0000000..a5a1080
--- /dev/null
+++ b/libm/x86_64/ftestexcept.c
@@ -0,0 +1,31 @@
+/* Test exception in current environment.
+ Copyright (C) 2001-2017 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>
+
+int
+fetestexcept (int excepts)
+{
+ int temp;
+ unsigned int mxscr;
+
+ /* Get current exceptions. */
+ __asm__ ("fnstsw %0\n"
+ "stmxcsr %1" : "=m" (*&temp), "=m" (*&mxscr));
+
+ return (temp | mxscr) & excepts & FE_ALL_EXCEPT;
+}