[git commit] libm: Add support for the Meta architecture
Bernhard Reutner-Fischer
rep.dot.nop at gmail.com
Thu Mar 14 21:47:04 UTC 2013
commit: http://git.uclibc.org/uClibc/commit/?id=cf349fcbb555b77f22d96fe3a7b25579337ab989
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/master
Signed-off-by: Markos Chandras <markos.chandras at imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop at gmail.com>
---
libc/sysdeps/linux/metag/bits/fenv.h | 77 ++++++++++++++++
libc/sysdeps/linux/metag/metag.c | 1 +
libm/metag/Makefile.arch | 23 +++++
libm/metag/fclrexcpt.c | 44 +++++++++
libm/metag/fedisblxcpt.c | 40 +++++++++
libm/metag/feenablxcpt.c | 40 +++++++++
libm/metag/fegetenv.c | 36 ++++++++
libm/metag/fegetexcept.c | 31 +++++++
libm/metag/fegetround.c | 30 +++++++
libm/metag/feholdexcpt.c | 41 +++++++++
libm/metag/fesetenv.c | 60 +++++++++++++
libm/metag/fesetround.c | 41 +++++++++
libm/metag/feupdateenv.c | 45 ++++++++++
libm/metag/fgetexcptflg.c | 34 +++++++
libm/metag/fraiseexcpt.c | 92 ++++++++++++++++++++
libm/metag/fsetexcptflg.c | 44 +++++++++
libm/metag/ftestexcept.c | 32 +++++++
.../linux/metag/metag.c => libm/metag/internal.h | 5 +-
18 files changed, 712 insertions(+), 4 deletions(-)
diff --git a/libc/sysdeps/linux/metag/bits/fenv.h b/libc/sysdeps/linux/metag/bits/fenv.h
new file mode 100644
index 0000000..2794405
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/fenv.h
@@ -0,0 +1,77 @@
+/* Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FENV_H
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+
+/* Define bits representing the exception. We use the bit positions
+ of the appropriate bits in TXDEFR. */
+enum
+ {
+ FE_INEXACT = 0x1,
+#define FE_INEXACT FE_INEXACT
+ FE_UNDERFLOW = 0x2,
+#define FE_UNDERFLOW FE_UNDERFLOW
+ FE_OVERFLOW = 0x4,
+#define FE_OVERFLOW FE_OVERFLOW
+ FE_DIVBYZERO = 0x8,
+#define FE_DIVBYZERO FE_DIVBYZERO
+ FE_INVALID = 0x10,
+#define FE_INVALID FE_INVALID
+ };
+
+#define FE_ALL_EXCEPT \
+ (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
+
+/* The Meta FPU supports all of the four defined rounding modes. We
+ use the values of the rounding mode bits in TXMODE as the values
+ for the appropriate macros. */
+enum
+ {
+ FE_TONEAREST = 0x0,
+#define FE_TONEAREST FE_TONEAREST
+ FE_TOWARDZERO = 0x1,
+#define FE_TOWARDZERO FE_TOWARDZERO
+ FE_UPWARD = 0x2,
+#define FE_UPWARD FE_UPWARD
+ FE_DOWNWARD = 0x3
+#define FE_DOWNWARD FE_DOWNWARD
+ };
+
+
+/* Type representing exception flags. */
+typedef unsigned int fexcept_t;
+
+
+/* Type representing floating-point environment. */
+typedef struct
+ {
+ unsigned int txdefr;
+ unsigned int txmode;
+ }
+fenv_t;
+
+/* If the default argument is used we use this value. */
+#define FE_DFL_ENV ((__const fenv_t *) -1)
+
+#ifdef __USE_GNU
+/* Floating-point environment where none of the exception is masked. */
+# define FE_NOMASK_ENV ((__const fenv_t *) -2)
+#endif
diff --git a/libc/sysdeps/linux/metag/metag.c b/libc/sysdeps/linux/metag/metag.c
index a92f214..bf2be68 100644
--- a/libc/sysdeps/linux/metag/metag.c
+++ b/libc/sysdeps/linux/metag/metag.c
@@ -8,3 +8,4 @@
#include <sys/syscall.h>
_syscall2(int,metag_setglobalbit,char *,addr,int,mask)
+_syscall1(void,metag_set_fpu_flags,unsigned int,flags)
diff --git a/libm/metag/Makefile.arch b/libm/metag/Makefile.arch
new file mode 100644
index 0000000..4cc5a6b
--- /dev/null
+++ b/libm/metag/Makefile.arch
@@ -0,0 +1,23 @@
+# Makefile for uClibc
+#
+# Copyright (c) 2013 Imagination Technologies Ltd.
+#
+# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+#
+
+ifeq ($(UCLIBC_HAS_FENV),y)
+ifeq ($(CONFIG_META_2_1),y)
+libm_ARCH_SRC:=$(wildcard $(libm_ARCH_DIR)/*.c)
+libm_ARCH_OBJ:=$(patsubst $(libm_ARCH_DIR)/%.c,$(libm_ARCH_OUT)/%.o,$(libm_ARCH_SRC))
+CFLAGS-libm += -Wa,-mfpu=metac21
+endif
+endif
+
+libm_ARCH_OBJS:=$(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/metag/fclrexcpt.c b/libm/metag/fclrexcpt.c
new file mode 100644
index 0000000..10bdc87
--- /dev/null
+++ b/libm/metag/fclrexcpt.c
@@ -0,0 +1,44 @@
+/* Clear given exceptions in current floating-point environment.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <unistd.h>
+
+#include "internal.h"
+
+int
+feclearexcept (int excepts)
+{
+ unsigned int temp;
+
+ /* Get the current exceptions. */
+ __asm__ ("MOV %0,TXDEFR" : "=r" (temp));
+
+ /* Mask out unsupported bits/exceptions. */
+ excepts &= FE_ALL_EXCEPT;
+
+ excepts <<= 16;
+
+ temp &= ~excepts;
+
+ metag_set_fpu_flags(temp);
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/metag/fedisblxcpt.c b/libm/metag/fedisblxcpt.c
new file mode 100644
index 0000000..07313fa
--- /dev/null
+++ b/libm/metag/fedisblxcpt.c
@@ -0,0 +1,40 @@
+/* Disable floating-point exceptions.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <unistd.h>
+
+#include "internal.h"
+
+int
+fedisableexcept (int excepts)
+{
+ unsigned int old_exc;
+
+ /* Get the current control word. */
+ __asm__ ("MOV %0,TXDEFR" : "=r" (old_exc));
+
+ old_exc &= FE_ALL_EXCEPT;
+
+ excepts = old_exc & ~excepts;
+
+ metag_set_fpu_flags(excepts);
+
+ return old_exc;
+}
diff --git a/libm/metag/feenablxcpt.c b/libm/metag/feenablxcpt.c
new file mode 100644
index 0000000..8feb964
--- /dev/null
+++ b/libm/metag/feenablxcpt.c
@@ -0,0 +1,40 @@
+/* Enable floating-point exceptions.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <unistd.h>
+
+#include "internal.h"
+
+int
+feenableexcept (int excepts)
+{
+ unsigned int old_exc;
+
+ /* Get the current control word. */
+ __asm__ ("MOV %0,TXDEFR" : "=r" (old_exc));
+
+ old_exc &= FE_ALL_EXCEPT;
+
+ excepts |= old_exc;
+
+ metag_set_fpu_flags(excepts);
+
+ return old_exc;
+}
diff --git a/libm/metag/fegetenv.c b/libm/metag/fegetenv.c
new file mode 100644
index 0000000..c932514
--- /dev/null
+++ b/libm/metag/fegetenv.c
@@ -0,0 +1,36 @@
+/* Store current floating-point environment.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+
+int
+fegetenv (fenv_t *envp)
+{
+ unsigned int txdefr;
+ unsigned int txmode;
+
+ __asm__ ("MOV %0,TXDEFR" : "=r" (txdefr));
+ __asm__ ("MOV %0,TXMODE" : "=r" (txmode));
+
+ envp->txdefr = txdefr;
+ envp->txmode = txmode;
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/metag/fegetexcept.c b/libm/metag/fegetexcept.c
new file mode 100644
index 0000000..8021f6c
--- /dev/null
+++ b/libm/metag/fegetexcept.c
@@ -0,0 +1,31 @@
+/* Get enabled floating-point exceptions.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+
+int
+fegetexcept (void)
+{
+ unsigned int exc;
+
+ /* Get the current control word. */
+ __asm__ ("MOV %0,TXDEFR" : "=r" (exc));
+
+ return exc & FE_ALL_EXCEPT;
+}
diff --git a/libm/metag/fegetround.c b/libm/metag/fegetround.c
new file mode 100644
index 0000000..1fb5ce2
--- /dev/null
+++ b/libm/metag/fegetround.c
@@ -0,0 +1,30 @@
+/* Return current rounding direction.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+
+int
+fegetround (void)
+{
+ unsigned int txmode;
+
+ __asm__ ("MOV %0,TXMODE" : "=r" (txmode));
+
+ return (txmode >> 16) & 0x3;
+}
diff --git a/libm/metag/feholdexcpt.c b/libm/metag/feholdexcpt.c
new file mode 100644
index 0000000..98ef4d0
--- /dev/null
+++ b/libm/metag/feholdexcpt.c
@@ -0,0 +1,41 @@
+/* Store current floating-point environment and clear exceptions.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <unistd.h>
+
+#include "internal.h"
+
+int
+feholdexcept (fenv_t *envp)
+{
+ unsigned int txdefr;
+ unsigned int txmode;
+
+ __asm__ ("MOV %0,TXDEFR" : "=r" (txdefr));
+ __asm__ ("MOV %0,TXMODE" : "=r" (txmode));
+
+ envp->txdefr = txdefr;
+ envp->txmode = txmode;
+
+ metag_set_fpu_flags(0);
+
+ return 0;
+}
diff --git a/libm/metag/fesetenv.c b/libm/metag/fesetenv.c
new file mode 100644
index 0000000..7295492
--- /dev/null
+++ b/libm/metag/fesetenv.c
@@ -0,0 +1,60 @@
+/* Install given floating-point environment.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <assert.h>
+
+#include "internal.h"
+
+libm_hidden_proto(fesetenv)
+
+int
+fesetenv (const fenv_t *envp)
+{
+ unsigned int exc;
+ unsigned int txmode;
+
+ __asm__ ("MOV %0,TXMODE" : "=r" (txmode));
+
+ /* Clear rounding mode bits (round to nearest). */
+ txmode &= ~(0x3 << 16);
+
+ if (envp == FE_DFL_ENV)
+ {
+ exc = 0;
+ }
+ else if (envp == FE_NOMASK_ENV)
+ {
+ exc = 0x1f;
+ }
+ else
+ {
+ exc = envp->txdefr & (FE_ALL_EXCEPT | (FE_ALL_EXCEPT << 16));
+ /* Write rounding mode and guard bit. */
+ txmode |= (0x1 << 18 ) | (envp->txmode & (0x3 << 16));
+ }
+
+ __asm__ ("MOV TXMODE,%0" : : "r" (txmode));
+
+ metag_set_fpu_flags(exc);
+
+ /* Success. */
+ return 0;
+}
+libm_hidden_def(fesetenv)
diff --git a/libm/metag/fesetround.c b/libm/metag/fesetround.c
new file mode 100644
index 0000000..2d5b252
--- /dev/null
+++ b/libm/metag/fesetround.c
@@ -0,0 +1,41 @@
+/* Set current rounding direction.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <unistd.h>
+
+int
+fesetround (int round)
+{
+ unsigned int txmode;
+
+ if ((round & ~0x3) != 0)
+ /* ROUND is no valid rounding mode. */
+ return 1;
+
+ __asm__ ("MOV %0,TXMODE" : "=r" (txmode));
+
+ txmode &= ~(0x3 << 16);
+ /* Write rounding mode and guard bit. */
+ txmode |= (0x1 << 18 ) | (round << 16);
+
+ __asm__ ("MOV TXMODE,%0" : : "r" (txmode));
+
+ return 0;
+}
diff --git a/libm/metag/feupdateenv.c b/libm/metag/feupdateenv.c
new file mode 100644
index 0000000..f2fc69f
--- /dev/null
+++ b/libm/metag/feupdateenv.c
@@ -0,0 +1,45 @@
+/* Install given floating-point environment and raise exceptions.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <unistd.h>
+
+libm_hidden_proto(fesetenv)
+libm_hidden_proto(feraiseexcept)
+
+int
+feupdateenv (const fenv_t *envp)
+{
+ unsigned int temp;
+
+ /* Save current exceptions. */
+ __asm__ ("MOV %0,TXDEFR" : "=r" (temp));
+
+ temp >>= 16;
+ temp &= FE_ALL_EXCEPT;
+
+ /* Install new environment. */
+ fesetenv (envp);
+
+ /* Raise the saved exception. */
+ feraiseexcept ((int) temp);
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/metag/fgetexcptflg.c b/libm/metag/fgetexcptflg.c
new file mode 100644
index 0000000..e1a4bdf
--- /dev/null
+++ b/libm/metag/fgetexcptflg.c
@@ -0,0 +1,34 @@
+/* Store current representation for exceptions.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+
+int
+fegetexceptflag (fexcept_t *flagp, int excepts)
+{
+ unsigned int temp;
+
+ /* Get the current exceptions. */
+ __asm__ ("MOV %0,TXDEFR" : "=r" (temp));
+
+ *flagp = temp & excepts & FE_ALL_EXCEPT;
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/metag/fraiseexcpt.c b/libm/metag/fraiseexcpt.c
new file mode 100644
index 0000000..9ab39bb
--- /dev/null
+++ b/libm/metag/fraiseexcpt.c
@@ -0,0 +1,92 @@
+/* Raise given exceptions.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <math.h>
+
+libm_hidden_proto(feraiseexcept)
+
+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)
+ {
+ /* Reciprocal square root of a negative number is invalid. */
+ __asm__ volatile(
+ "F MOV FX.0,#0xc000 ! -2\n"
+ "F RSQ FX.1,FX.0\n"
+ );
+ }
+
+ /* Next: division by zero. */
+ if ((FE_DIVBYZERO & excepts) != 0)
+ {
+ __asm__ volatile(
+ "F MOV FX.0,#0\n"
+ "F RCP FX.1,FX.0\n"
+ );
+ }
+
+ /* Next: overflow. */
+ if ((FE_OVERFLOW & excepts) != 0)
+ {
+ /* Adding a large number in single precision can cause overflow. */
+ __asm__ volatile(
+ " MOVT D0.0,#0x7f7f\n"
+ " ADD D0.0,D0.0,#0xffff\n"
+ "F MOV FX.0,D0.0\n"
+ "F ADD FX.1,FX.0,FX.0\n"
+ );
+ }
+
+ /* Next: underflow. */
+ if ((FE_UNDERFLOW & excepts) != 0)
+ {
+ /* Multiplying a small value by 0.5 will cause an underflow. */
+ __asm__ volatile(
+ " MOV D0.0,#1\n"
+ "F MOV FX.0,D0.0\n"
+ " MOVT D0.0,#0x3f00\n"
+ "F MOV FX.1,D0.0\n"
+ "F MUL FX.2,FX.1,FX.0\n"
+ );
+ }
+
+ /* Last: inexact. */
+ if ((FE_INEXACT & excepts) != 0)
+ {
+ /* Converting a small single precision value to half precision
+ can cause an inexact exception. */
+ __asm__ volatile(
+ " MOV D0.0,#0x0001\n"
+ "F MOV FX.0,D0.0\n"
+ "F FTOH FX.1,FX.0\n"
+ );
+ }
+
+ /* Success. */
+ return 0;
+}
+libm_hidden_def(feraiseexcept)
diff --git a/libm/metag/fsetexcptflg.c b/libm/metag/fsetexcptflg.c
new file mode 100644
index 0000000..11ae917
--- /dev/null
+++ b/libm/metag/fsetexcptflg.c
@@ -0,0 +1,44 @@
+/* Set floating-point environment exception handling.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <math.h>
+#include <unistd.h>
+
+#include "internal.h"
+
+int
+fesetexceptflag (const fexcept_t *flagp, int excepts)
+{
+ unsigned int temp;
+
+ /* Get the current exceptions. */
+ __asm__ ("MOV %0,TXDEFR" : "=r" (temp));
+
+ excepts &= FE_ALL_EXCEPT;
+ excepts <<= 16;
+
+ temp &= ~excepts;
+ temp |= *flagp & excepts;
+
+ metag_set_fpu_flags(temp);
+
+ /* Success. */
+ return 0;
+}
diff --git a/libm/metag/ftestexcept.c b/libm/metag/ftestexcept.c
new file mode 100644
index 0000000..898630d
--- /dev/null
+++ b/libm/metag/ftestexcept.c
@@ -0,0 +1,32 @@
+/* Test exception in current environment.
+ Copyright (C) 2013 Imagination Technologies Ltd.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv.h>
+#include <unistd.h>
+
+int
+fetestexcept (int excepts)
+{
+ unsigned int temp;
+
+ /* Get the current exceptions. */
+ __asm__ ("MOV %0,TXDEFR" : "=r" (temp));
+
+ return (temp >> 16) & excepts & FE_ALL_EXCEPT;
+}
diff --git a/libc/sysdeps/linux/metag/metag.c b/libm/metag/internal.h
similarity index 59%
copy from libc/sysdeps/linux/metag/metag.c
copy to libm/metag/internal.h
index a92f214..7729772 100644
--- a/libc/sysdeps/linux/metag/metag.c
+++ b/libm/metag/internal.h
@@ -4,7 +4,4 @@
* Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
*/
-#include <errno.h>
-#include <sys/syscall.h>
-
-_syscall2(int,metag_setglobalbit,char *,addr,int,mask)
+void metag_set_fpu_flags(unsigned int flags);
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