Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 229 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/powerpc/fpu/fenv_private.h b/REORG.TODO/sysdeps/powerpc/fpu/fenv_private.h
new file mode 100644
index 0000000000..877f25bcf2
--- /dev/null
+++ b/REORG.TODO/sysdeps/powerpc/fpu/fenv_private.h
@@ -0,0 +1,229 @@
+/* Private floating point rounding and exceptions handling. PowerPC version.
+   Copyright (C) 2013-2017 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/>.  */
+
+#ifndef FENV_PRIVATE_H
+#define FENV_PRIVATE_H 1
+
+#include <fenv.h>
+#include <fenv_libc.h>
+#include <fpu_control.h>
+
+/* Mask for the exception enable bits.  */
+#define _FPU_ALL_TRAPS (_FPU_MASK_ZM | _FPU_MASK_OM | _FPU_MASK_UM \
+                      | _FPU_MASK_XM | _FPU_MASK_IM)
+
+/* Mask the rounding mode bits.  */
+#define _FPU_MASK_RN (~0x3)
+
+/* Mask everything but the rounding moded and non-IEEE arithmetic flags.  */
+#define _FPU_MASK_NOT_RN_NI 0xffffffff00000007LL
+
+/* Mask restore rounding mode and exception enabled.  */
+#define _FPU_MASK_TRAPS_RN 0xffffffff1fffff00LL
+
+/* Mask exception enable but fraction rounded/inexact and FP result/CC
+   bits.  */
+#define _FPU_MASK_FRAC_INEX_RET_CC 0xffffffff1ff80fff
+
+static __always_inline void
+__libc_feholdbits_ppc (fenv_t *envp, unsigned long long mask,
+	unsigned long long bits)
+{
+  fenv_union_t old, new;
+
+  old.fenv = *envp = fegetenv_register ();
+
+  new.l = (old.l & mask) | bits;
+
+  /* If the old env had any enabled exceptions, then mask SIGFPE in the
+     MSR FE0/FE1 bits.  This may allow the FPU to run faster because it
+     always takes the default action and can not generate SIGFPE.  */
+  if ((old.l & _FPU_ALL_TRAPS) != 0)
+    (void) __fe_mask_env ();
+
+  fesetenv_register (new.fenv);
+}
+
+static __always_inline void
+libc_feholdexcept_ppc (fenv_t *envp)
+{
+  __libc_feholdbits_ppc (envp, _FPU_MASK_NOT_RN_NI, 0LL);
+}
+
+static __always_inline void
+libc_feholdexcept_setround_ppc (fenv_t *envp, int r)
+{
+  __libc_feholdbits_ppc (envp, _FPU_MASK_NOT_RN_NI & _FPU_MASK_RN, r);
+}
+
+static __always_inline void
+libc_fesetround_ppc (int r)
+{
+  __fesetround_inline (r);
+}
+
+static __always_inline int
+libc_fetestexcept_ppc (int e)
+{
+  fenv_union_t u;
+  u.fenv = fegetenv_register ();
+  return u.l & e;
+}
+
+static __always_inline void
+libc_feholdsetround_ppc (fenv_t *e, int r)
+{
+  __libc_feholdbits_ppc (e, _FPU_MASK_TRAPS_RN, r);
+}
+
+static __always_inline unsigned long long
+__libc_femergeenv_ppc (const fenv_t *envp, unsigned long long old_mask,
+	unsigned long long new_mask)
+{
+  fenv_union_t old, new;
+
+  new.fenv = *envp;
+  old.fenv = fegetenv_register ();
+
+  /* Merge bits while masking unwanted bits from new and old env.  */
+  new.l = (old.l & old_mask) | (new.l & new_mask);
+
+  /* If the old env has no enabled exceptions and the new env has any enabled
+     exceptions, then unmask SIGFPE in the MSR FE0/FE1 bits.  This will put the
+     hardware into "precise mode" and may cause the FPU to run slower on some
+     hardware.  */
+  if ((old.l & _FPU_ALL_TRAPS) == 0 && (new.l & _FPU_ALL_TRAPS) != 0)
+    (void) __fe_nomask_env_priv ();
+
+  /* If the old env had any enabled exceptions and the new env has no enabled
+     exceptions, then mask SIGFPE in the MSR FE0/FE1 bits.  This may allow the
+     FPU to run faster because it always takes the default action and can not
+     generate SIGFPE.  */
+  if ((old.l & _FPU_ALL_TRAPS) != 0 && (new.l & _FPU_ALL_TRAPS) == 0)
+    (void) __fe_mask_env ();
+
+  /* Atomically enable and raise (if appropriate) exceptions set in `new'.  */
+  fesetenv_register (new.fenv);
+
+  return old.l;
+}
+
+static __always_inline void
+libc_fesetenv_ppc (const fenv_t *envp)
+{
+  /* Replace the entire environment.  */
+  __libc_femergeenv_ppc (envp, 0LL, -1LL);
+}
+
+static __always_inline void
+libc_feresetround_ppc (fenv_t *envp)
+{
+  __libc_femergeenv_ppc (envp, _FPU_MASK_TRAPS_RN, _FPU_MASK_FRAC_INEX_RET_CC);
+}
+
+static __always_inline int
+libc_feupdateenv_test_ppc (fenv_t *envp, int ex)
+{
+  return __libc_femergeenv_ppc (envp, _FPU_MASK_TRAPS_RN,
+				_FPU_MASK_FRAC_INEX_RET_CC) & ex;
+}
+
+static __always_inline void
+libc_feupdateenv_ppc (fenv_t *e)
+{
+  libc_feupdateenv_test_ppc (e, 0);
+}
+
+#define libc_feholdexceptf           libc_feholdexcept_ppc
+#define libc_feholdexcept            libc_feholdexcept_ppc
+#define libc_feholdexcept_setroundf  libc_feholdexcept_setround_ppc
+#define libc_feholdexcept_setround   libc_feholdexcept_setround_ppc
+#define libc_fetestexceptf           libc_fetestexcept_ppc
+#define libc_fetestexcept            libc_fetestexcept_ppc
+#define libc_fesetroundf             libc_fesetround_ppc
+#define libc_fesetround              libc_fesetround_ppc
+#define libc_fesetenvf               libc_fesetenv_ppc
+#define libc_fesetenv                libc_fesetenv_ppc
+#define libc_feupdateenv_testf       libc_feupdateenv_test_ppc
+#define libc_feupdateenv_test        libc_feupdateenv_test_ppc
+#define libc_feupdateenvf            libc_feupdateenv_ppc
+#define libc_feupdateenv             libc_feupdateenv_ppc
+#define libc_feholdsetroundf         libc_feholdsetround_ppc
+#define libc_feholdsetround          libc_feholdsetround_ppc
+#define libc_feresetroundf           libc_feresetround_ppc
+#define libc_feresetround            libc_feresetround_ppc
+
+
+/* We have support for rounding mode context.  */
+#define HAVE_RM_CTX 1
+
+static __always_inline void
+libc_feholdsetround_ppc_ctx (struct rm_ctx *ctx, int r)
+{
+  fenv_union_t old, new;
+
+  old.fenv = fegetenv_register ();
+
+  new.l = (old.l & _FPU_MASK_TRAPS_RN) | r;
+
+  ctx->env = old.fenv;
+  if (__glibc_unlikely (new.l != old.l))
+    {
+      if ((old.l & _FPU_ALL_TRAPS) != 0)
+	(void) __fe_mask_env ();
+      fesetenv_register (new.fenv);
+      ctx->updated_status = true;
+    }
+  else
+    ctx->updated_status = false;
+}
+
+static __always_inline void
+libc_fesetenv_ppc_ctx (struct rm_ctx *ctx)
+{
+  libc_fesetenv_ppc (&ctx->env);
+}
+
+static __always_inline void
+libc_feupdateenv_ppc_ctx (struct rm_ctx *ctx)
+{
+  if (__glibc_unlikely (ctx->updated_status))
+    libc_feresetround_ppc (&ctx->env);
+}
+
+static __always_inline void
+libc_feresetround_ppc_ctx (struct rm_ctx *ctx)
+{
+  if (__glibc_unlikely (ctx->updated_status))
+    libc_feresetround_ppc (&ctx->env);
+}
+
+#define libc_fesetenv_ctx                libc_fesetenv_ppc_ctx
+#define libc_fesetenvf_ctx               libc_fesetenv_ppc_ctx
+#define libc_fesetenvl_ctx               libc_fesetenv_ppc_ctx
+#define libc_feholdsetround_ctx          libc_feholdsetround_ppc_ctx
+#define libc_feholdsetroundf_ctx         libc_feholdsetround_ppc_ctx
+#define libc_feholdsetroundl_ctx         libc_feholdsetround_ppc_ctx
+#define libc_feresetround_ctx            libc_feresetround_ppc_ctx
+#define libc_feresetroundf_ctx           libc_feresetround_ppc_ctx
+#define libc_feresetroundl_ctx           libc_feresetround_ppc_ctx
+#define libc_feupdateenv_ctx             libc_feupdateenv_ppc_ctx
+#define libc_feupdateenvf_ctx            libc_feupdateenv_ppc_ctx
+#define libc_feupdateenvl_ctx            libc_feupdateenv_ppc_ctx
+
+#endif