Add powerpc-nofpu/e500 support functions for atomic compound assignment and FLT_ROUNDS.

14 files changed, 371 insertions, 4 deletions

diff --git a/ChangeLog b/ChangeLog
index 3793b1e981..e25f5d0b19 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,30 @@
 2013-11-28  Joseph Myers  <joseph@codesourcery.com>
 
+	* sysdeps/powerpc/nofpu/atomic-feclearexcept.c: New file.
+	* sysdeps/powerpc/nofpu/atomic-feholdexcept.c: Likewise.
+	* sysdeps/powerpc/nofpu/atomic-feupdateenv.c: Likewise.
+	* sysdeps/powerpc/nofpu/flt-rounds.c: Likewise.
+	* sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feclearexcept.c:
+	Likewise.
+	* sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feholdexcept.c:
+	Likewise.
+	* sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feupdateenv.c:
+	Likewise.
+	* sysdeps/powerpc/powerpc32/e500/nofpu/flt-rounds.c: Likewise.
+	* sysdeps/powerpc/nofpu/Makefile [$(subdir) = soft-fp]
+	(sysdep_routines): Add atomic-feholdexcept, atomic-feclearexcept,
+	atomic-feupdateenv and flt-rounds.
+	* sysdeps/powerpc/nofpu/Versions (libc): Add
+	__atomic_feholdexcept, __atomic_feclearexcept,
+	__atomic_feupdateenv and __flt_rounds to GLIBC_2.19.
+	* sysdeps/powerpc/powerpc32/e500/nofpu/fenv_libc.h
+	(__feraiseexcept_soft): Declare and use libc_hidden_proto here.
+	* sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcept-soft.c
+	(__feraiseexcept_soft): Don't declare and use libc_hidden_proto
+	here.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libc.abilist:
+	Update.
+
 	* manual/arith.texi (FP Exceptions): Document that exceptions may
 	not be raised when matherr is used.
 	(Math Error Reporting): Document overflow in directed rounding
diff --git a/sysdeps/powerpc/nofpu/Makefile b/sysdeps/powerpc/nofpu/Makefile
index b9cbf80230..9de7c43747 100644
--- a/sysdeps/powerpc/nofpu/Makefile
+++ b/sysdeps/powerpc/nofpu/Makefile
@@ -2,7 +2,8 @@
 
 ifeq ($(subdir),soft-fp)
 sysdep_routines += $(gcc-single-routines) $(gcc-double-routines) \
-		   sim-full
+		   sim-full atomic-feholdexcept atomic-feclearexcept \
+		   atomic-feupdateenv flt-rounds
 endif
 
 ifeq ($(subdir),math)
diff --git a/sysdeps/powerpc/nofpu/Versions b/sysdeps/powerpc/nofpu/Versions
index 8ba6021e9e..571b1d2c96 100644
--- a/sysdeps/powerpc/nofpu/Versions
+++ b/sysdeps/powerpc/nofpu/Versions
@@ -17,6 +17,10 @@ libc {
     __gtdf2; __gtsf2;
     __ltdf2; __ltsf2;
   }
+  GLIBC_2.19 {
+    __atomic_feholdexcept; __atomic_feclearexcept; __atomic_feupdateenv;
+    __flt_rounds;
+  }
   GLIBC_PRIVATE {
     __sim_exceptions_thread;
     __sim_disabled_exceptions_thread;
diff --git a/sysdeps/powerpc/nofpu/atomic-feclearexcept.c b/sysdeps/powerpc/nofpu/atomic-feclearexcept.c
new file mode 100644
index 0000000000..c2b2ee9386
--- /dev/null
+++ b/sysdeps/powerpc/nofpu/atomic-feclearexcept.c
@@ -0,0 +1,28 @@
+/* Clear floating-point exceptions for atomic compound assignment.
+   Copyright (C) 2013 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "soft-fp.h"
+#include "soft-supp.h"
+
+void
+__atomic_feclearexcept (void)
+{
+  /* This function postdates the global variables being turned into
+     compat symbols, so no need to set them.  */
+  __sim_exceptions_thread = 0;
+}
diff --git a/sysdeps/powerpc/nofpu/atomic-feholdexcept.c b/sysdeps/powerpc/nofpu/atomic-feholdexcept.c
new file mode 100644
index 0000000000..07b11d0557
--- /dev/null
+++ b/sysdeps/powerpc/nofpu/atomic-feholdexcept.c
@@ -0,0 +1,38 @@
+/* Store current floating-point environment and clear exceptions for
+   atomic compound assignment.
+   Copyright (C) 2013 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "soft-fp.h"
+#include "soft-supp.h"
+
+void
+__atomic_feholdexcept (fenv_t *envp)
+{
+  fenv_union_t u;
+
+  u.l[0] = __sim_exceptions_thread;
+  /* The rounding mode is not changed by arithmetic, so no need to
+     save it.  */
+  u.l[1] = __sim_disabled_exceptions_thread;
+  *envp = u.fenv;
+
+  /* This function postdates the global variables being turned into
+     compat symbols, so no need to set them.  */
+  __sim_exceptions_thread = 0;
+  __sim_disabled_exceptions_thread = FE_ALL_EXCEPT;
+}
diff --git a/sysdeps/powerpc/nofpu/atomic-feupdateenv.c b/sysdeps/powerpc/nofpu/atomic-feupdateenv.c
new file mode 100644
index 0000000000..9334e1192c
--- /dev/null
+++ b/sysdeps/powerpc/nofpu/atomic-feupdateenv.c
@@ -0,0 +1,37 @@
+/* Install given floating-point environment and raise exceptions for
+   atomic compound assignment.
+   Copyright (C) 2013 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "soft-fp.h"
+#include "soft-supp.h"
+#include <signal.h>
+
+void
+__atomic_feupdateenv (const fenv_t *envp)
+{
+  fenv_union_t u;
+  int saved_exceptions = __sim_exceptions_thread;
+
+  /* This function postdates the global variables being turned into
+     compat symbols, so no need to set them.  */
+  u.fenv = *envp;
+  __sim_exceptions_thread |= u.l[0];
+  __sim_disabled_exceptions_thread = u.l[1];
+  if (saved_exceptions & ~__sim_disabled_exceptions_thread)
+    raise (SIGFPE);
+}
diff --git a/sysdeps/powerpc/nofpu/flt-rounds.c b/sysdeps/powerpc/nofpu/flt-rounds.c
new file mode 100644
index 0000000000..ad2bf941d1
--- /dev/null
+++ b/sysdeps/powerpc/nofpu/flt-rounds.c
@@ -0,0 +1,38 @@
+/* Return current rounding mode as correct value for FLT_ROUNDS.
+   Copyright (C) 2013 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "soft-fp.h"
+#include "soft-supp.h"
+
+int
+__flt_rounds (void)
+{
+  switch (__sim_round_mode_thread)
+    {
+    case FP_RND_ZERO:
+      return 0;
+    case FP_RND_NEAREST:
+      return 1;
+    case FP_RND_PINF:
+      return 2;
+    case FP_RND_MINF:
+      return 3;
+    default:
+      abort ();
+    }
+}
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feclearexcept.c b/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feclearexcept.c
new file mode 100644
index 0000000000..9005119f78
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feclearexcept.c
@@ -0,0 +1,50 @@
+/* Clear floating-point exceptions for atomic compound assignment.
+   e500 version.
+   Copyright (C) 2004-2013 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fenv_libc.h>
+#include <stdlib.h>
+#include <sysdep.h>
+#include <sys/prctl.h>
+
+void
+__atomic_feclearexcept (void)
+{
+  unsigned int fpescr, old_fpescr;
+
+  /* Get the current state.  */
+  old_fpescr = fpescr = fegetenv_register ();
+
+  /* Clear the relevant bits.  */
+  fpescr &= ~SPEFSCR_ALL_EXCEPT;
+
+  /* Put the new state in effect.  */
+  fesetenv_register (fpescr);
+
+  /* Let the kernel know if the "invalid" or "underflow" bit was
+     cleared.  */
+  if (old_fpescr & (SPEFSCR_FINVS | SPEFSCR_FUNFS))
+    {
+      int pflags __attribute__ ((__unused__)), r;
+      INTERNAL_SYSCALL_DECL (err);
+
+      r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags);
+      if (INTERNAL_SYSCALL_ERROR_P (r, err))
+	abort ();
+    }
+}
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feholdexcept.c b/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feholdexcept.c
new file mode 100644
index 0000000000..afd225e2cf
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feholdexcept.c
@@ -0,0 +1,55 @@
+/* Store current floating-point environment and clear exceptions for
+   atomic compound assignment.  e500 version.
+   Copyright (C) 2004-2013 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fenv_libc.h>
+#include <stdlib.h>
+#include <sysdep.h>
+#include <sys/prctl.h>
+
+void
+__atomic_feholdexcept (fenv_t *envp)
+{
+  fenv_union_t u;
+  INTERNAL_SYSCALL_DECL (err);
+  int r;
+
+  /* Get the current state.  */
+  r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &u.l[0]);
+  if (INTERNAL_SYSCALL_ERROR_P (r, err))
+    abort ();
+
+  u.l[1] = fegetenv_register ();
+  *envp = u.fenv;
+
+  /* Clear everything except for the rounding mode and trapping to the
+     kernel.  */
+  u.l[0] &= ~(PR_FP_EXC_DIV
+	      | PR_FP_EXC_OVF
+	      | PR_FP_EXC_UND
+	      | PR_FP_EXC_RES
+	      | PR_FP_EXC_INV);
+  u.l[1] &= SPEFSCR_FRMC | (SPEFSCR_ALL_EXCEPT_ENABLE & ~SPEFSCR_FINXE);
+
+  /* Put the new state in effect.  */
+  fesetenv_register (u.l[1]);
+  r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC,
+			u.l[0] | PR_FP_EXC_SW_ENABLE);
+  if (INTERNAL_SYSCALL_ERROR_P (r, err))
+    abort ();
+}
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feupdateenv.c b/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feupdateenv.c
new file mode 100644
index 0000000000..9ae6b45087
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feupdateenv.c
@@ -0,0 +1,46 @@
+/* Install given floating-point environment and raise exceptions for
+   atomic compound assignment.  e500 version.
+   Copyright (C) 2004-2013 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fenv_libc.h>
+#include <stdlib.h>
+#include <sysdep.h>
+#include <sys/prctl.h>
+
+void
+__atomic_feupdateenv (const fenv_t *envp)
+{
+  int exc;
+  fenv_union_t u;
+  INTERNAL_SYSCALL_DECL (err);
+  int r;
+
+  /* Save the currently set exceptions.  */
+  exc = fegetenv_register () & SPEFSCR_ALL_EXCEPT;
+
+  u.fenv = *envp;
+
+  fesetenv_register (u.l[1]);
+  r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC,
+			u.l[0] | PR_FP_EXC_SW_ENABLE);
+  if (INTERNAL_SYSCALL_ERROR_P (r, err))
+    abort ();
+
+  /* Raise (if appropriate) saved exceptions. */
+  __feraiseexcept_soft (exc);
+}
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/fenv_libc.h b/sysdeps/powerpc/powerpc32/e500/nofpu/fenv_libc.h
index e905edadef..a69d061982 100644
--- a/sysdeps/powerpc/powerpc32/e500/nofpu/fenv_libc.h
+++ b/sysdeps/powerpc/powerpc32/e500/nofpu/fenv_libc.h
@@ -27,6 +27,9 @@
 int __feraiseexcept_spe (int);
 libm_hidden_proto (__feraiseexcept_spe)
 
+int __feraiseexcept_soft (int);
+libc_hidden_proto (__feraiseexcept_soft)
+
 int __fexcepts_to_spe (int);
 libm_hidden_proto (__fexcepts_to_spe)
 
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/flt-rounds.c b/sysdeps/powerpc/powerpc32/e500/nofpu/flt-rounds.c
new file mode 100644
index 0000000000..49e6eeb614
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/e500/nofpu/flt-rounds.c
@@ -0,0 +1,39 @@
+/* Return current rounding mode as correct value for FLT_ROUNDS.  e500
+   version.
+   Copyright (C) 2013 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fenv_libc.h>
+#include <stdlib.h>
+
+int
+__flt_rounds (void)
+{
+  switch (fegetenv_register () & SPEFSCR_FRMC)
+    {
+    case FE_TOWARDZERO:
+      return 0;
+    case FE_TONEAREST:
+      return 1;
+    case FE_UPWARD:
+      return 2;
+    case FE_DOWNWARD:
+      return 3;
+    default:
+      abort ();
+    }
+}
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcept-soft.c b/sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcept-soft.c
index 0aed72ff3c..22b2bdadbf 100644
--- a/sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcept-soft.c
+++ b/sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcept-soft.c
@@ -20,9 +20,6 @@
 #include <fenv_libc.h>
 #include <libc-symbols.h>
 
-int __feraiseexcept_soft (int);
-libc_hidden_proto (__feraiseexcept_soft)
-
 #define __FERAISEEXCEPT_INTERNAL __feraiseexcept_soft
 #include "spe-raise.c"
 libc_hidden_def (__feraiseexcept_soft)
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libc.abilist
index 9b6d663748..a54382e43d 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libc.abilist
@@ -1784,6 +1784,12 @@ GLIBC_2.17
 GLIBC_2.18
  GLIBC_2.18 A
  __cxa_thread_atexit_impl F
+GLIBC_2.19
+ GLIBC_2.19 A
+ __atomic_feclearexcept F
+ __atomic_feholdexcept F
+ __atomic_feupdateenv F
+ __flt_rounds F
 GLIBC_2.2
  GLIBC_2.2 A
  _IO_adjust_wcolumn F