Add C-SKY port

This patch add two abi combinations support for C-SKY ABIV2: soft-float
little endian, hard float little endian. C-SKY ABI manual and architecture
user guide are available from: https://github.com/c-sky/csky-doc

	* config.h.in (CSKYABI, CSKY_HARD_FLOAT): New Define.
	* scripts/build-many-glibcs.py: Add C-SKY targets.
	* sysdeps/csky/Implies: New file.
	* sysdeps/csky/Makefile: Likewise.
	* sysdeps/csky/abiv2/__longjmp.S: Likewise.
	* sysdeps/csky/abiv2/csky-mcount.S: Likewise.
	* sysdeps/csky/abiv2/dl-trampoline.S: Likewise.
	* sysdeps/csky/abiv2/memcmp.S: Likewise.
	* sysdeps/csky/abiv2/memcpy.S: Likewise.
	* sysdeps/csky/abiv2/memmove.S: Likewise.
	* sysdeps/csky/abiv2/memset.S: Likewise.
	* sysdeps/csky/abiv2/setjmp.S: Likewise.
	* sysdeps/csky/abiv2/start.S: Likewise.
	* sysdeps/csky/abiv2/strcmp.S: Likewise.
	* sysdeps/csky/abiv2/strcpy.S: Likewise.
	* sysdeps/csky/abiv2/strlen.S: Likewise.
	* sysdeps/csky/abiv2/tls-macros.h: Likewise.
	* sysdeps/csky/abort-instr.h: Likewise.
	* sysdeps/csky/atomic-machine.h: Likewise.
	* sysdeps/csky/bits/endian.h: Likewise.
	* sysdeps/csky/bits/fenv.h: Likewise.
	* sysdeps/csky/bits/link.h: Likewise.
	* sysdeps/csky/bits/setjmp.h: Likewise.
	* sysdeps/csky/bsd-_setjmp.S: Likewise.
	* sysdeps/csky/bsd-setjmp.S: Likewise.
	* sysdeps/csky/configure: Likewise.
	* sysdeps/csky/configure.ac: Likewise.
	* sysdeps/csky/dl-machine.h: Likewise.
	* sysdeps/csky/dl-procinfo.c: Likewise.
	* sysdeps/csky/dl-procinfo.h: Likewise.
	* sysdeps/csky/dl-sysdep.h: Likewise.
	* sysdeps/csky/dl-tls.h: Likewise.
	* sysdeps/csky/fpu/fclrexcpt.c: Likewise.
	* sysdeps/csky/fpu/fedisblxcpt.c: Likewise.
	* sysdeps/csky/fpu/feenablxcpt.c: Likewise.
	* sysdeps/csky/fpu/fegetenv.c: Likewise.
	* sysdeps/csky/fpu/fegetexcept.c: Likewise.
	* sysdeps/csky/fpu/fegetmode.c: Likewise.
	* sysdeps/csky/fpu/fegetround.c: Likewise.
	* sysdeps/csky/fpu/feholdexcpt.c: Likewise.
	* sysdeps/csky/fpu/fenv_libc.h: Likewise.
	* sysdeps/csky/fpu/fenv_private.h: Likewise.
	* sysdeps/csky/fpu/fesetenv.c: Likewise.
	* sysdeps/csky/fpu/fesetexcept.c: Likewise.
	* sysdeps/csky/fpu/fesetmode.c: Likewise.
	* sysdeps/csky/fpu/fesetround.c: Likewise.
	* sysdeps/csky/fpu/feupdateenv.c: Likewise.
	* sysdeps/csky/fpu/fgetexcptflg.c: Likewise.
	* sysdeps/csky/fpu/fix-fp-int-convert-overflow.h: Likewise.
	* sysdeps/csky/fpu/fraiseexcpt.c: Likewise.
	* sysdeps/csky/fpu/fsetexcptflg.c: Likewise.
	* sysdeps/csky/fpu/ftestexcept.c: Likewise.
	* sysdeps/csky/fpu/libm-test-ulps: Likewise.
	* sysdeps/csky/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/csky/fpu_control.h: Likewise.
	* sysdeps/csky/gccframe.h: Likewise.
	* sysdeps/csky/jmpbuf-unwind.h: Likewise.
	* sysdeps/csky/ldsodefs.h: Likewise.
	* sysdeps/csky/libc-tls.c: Likewise.
	* sysdeps/csky/linkmap.h: Likewise.
	* sysdeps/csky/machine-gmon.h: Likewise.
	* sysdeps/csky/memusage.h: Likewise.
	* sysdeps/csky/nofpu/Implies: Likewise.
	* sysdeps/csky/nofpu/libm-test-ulps: Likewise.
	* sysdeps/csky/nofpu/libm-test-ulps-name: Likewise.
	* sysdeps/csky/nptl/Makefile: Likewise.
	* sysdeps/csky/nptl/bits/pthreadtypes-arch.h: Likewise.
	* sysdeps/csky/nptl/bits/semaphore.h: Likewise.
	* sysdeps/csky/nptl/pthread-offsets.h: Likewise.
	* sysdeps/csky/nptl/pthreaddef.h: Likewise.
	* sysdeps/csky/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/csky/nptl/tls.h: Likewise.
	* sysdeps/csky/preconfigure: Likewise.
	* sysdeps/csky/sfp-machine.h: Likewise.
	* sysdeps/csky/sotruss-lib.c: Likewise.
	* sysdeps/csky/stackinfo.h: Likewise.
	* sysdeps/csky/sysdep.h: Likewise.
	* sysdeps/csky/tininess.h: Likewise.
	* sysdeps/csky/tst-audit.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/Implies: Likewise.
	* sysdeps/unix/sysv/linux/csky/Makefile: Likewise.
	* sysdeps/unix/sysv/linux/csky/Versions: Likewise.
	* sysdeps/unix/sysv/linux/csky/abiv2/____longjmp_chk.S: Likewise.
	* sysdeps/unix/sysv/linux/csky/abiv2/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/csky/abiv2/getcontext.S: Likewise.
	* sysdeps/unix/sysv/linux/csky/abiv2/setcontext.S: Likewise.
	* sysdeps/unix/sysv/linux/csky/abiv2/swapcontext.S: Likewise.
	* sysdeps/unix/sysv/linux/csky/abiv2/syscall.S: Likewise.
	* sysdeps/unix/sysv/linux/csky/abiv2/sysdep.S: Likewise.
	* sysdeps/unix/sysv/linux/csky/abiv2/ucontext_i.sym: Likewise.
	* sysdeps/unix/sysv/linux/csky/bits/procfs.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/bits/shmlba.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/c++-types.data: Likewise.
	* sysdeps/unix/sysv/linux/csky/configure: Likewise.
	* sysdeps/unix/sysv/linux/csky/configure.ac: Likewise.
	* sysdeps/unix/sysv/linux/csky/ipc_priv.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/jmp_buf-macros.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/kernel-features.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/ld.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/ldconfig.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/libBrokenLocale.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/libanl.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/libcrypt.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/libdl.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/libpthread.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/libresolv.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/librt.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/libthread_db.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/libutil.abilist: Likewise.
	* sysdeps/unix/sysv/linux/csky/localplt.data: Likewise.
	* sysdeps/unix/sysv/linux/csky/makecontext.c: Likewise.
	* sysdeps/unix/sysv/linux/csky/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/pt-vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/csky/register-dump.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/shlib-versions: Likewise.
	* sysdeps/unix/sysv/linux/csky/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/sys/cachectl.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/sys/user.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/csky/sysdep.h: Likewise.

1 files changed, 280 insertions, 0 deletions

diff --git a/sysdeps/csky/fpu/fenv_private.h b/sysdeps/csky/fpu/fenv_private.h
new file mode 100644
index 0000000000..d086cfcfbb
--- /dev/null
+++ b/sysdeps/csky/fpu/fenv_private.h
@@ -0,0 +1,280 @@
+/* Private floating point rounding and exceptions handling.  C-SKY version.
+   Copyright (C) 2018 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 CSKY_FENV_PRIVATE_H
+#define CSKY_FENV_PRIVATE_H 1
+
+#include <fenv.h>
+#include <fpu_control.h>
+#include <fenv_libc.h>
+
+static __always_inline void
+libc_feholdexcept_vfp (fenv_t *envp)
+{
+  fpu_control_t fpsr, fpcr;
+
+  _FPU_GETCW (fpcr);
+  envp->__fpcr = fpcr;
+
+  _FPU_GETFPSR (fpsr);
+  envp->__fpsr = fpsr;
+
+  /* Now set all exceptions to non-stop.  */
+  fpcr &= ~FE_ALL_EXCEPT;
+
+  /* And clear all exception flags.  */
+  fpsr &= ~(FE_ALL_EXCEPT << CAUSE_SHIFT);
+
+  _FPU_SETFPSR (fpsr);
+
+  _FPU_SETCW (fpcr);
+}
+
+static __always_inline void
+libc_fesetround_vfp (int round)
+{
+  fpu_control_t fpcr;
+
+  _FPU_GETCW (fpcr);
+
+  /* Set new rounding mode if different.  */
+  if (__glibc_unlikely ((fpcr & FE_DOWNWARD) != round))
+    _FPU_SETCW ((fpcr & ~FE_DOWNWARD) | round);
+}
+
+static __always_inline void
+libc_feholdexcept_setround_vfp (fenv_t *envp, int round)
+{
+  fpu_control_t fpsr, fpcr;
+
+  _FPU_GETCW (fpcr);
+  envp->__fpcr = fpcr;
+
+  _FPU_GETFPSR (fpsr);
+  envp->__fpsr = fpsr;
+
+  /* Clear exception flags, set all exceptions to non-stop,
+     and set new rounding mode.  */
+  fpsr &= ~(FE_ALL_EXCEPT << CAUSE_SHIFT);
+  _FPU_SETFPSR (fpsr);
+
+  fpcr &= ~(FE_ALL_EXCEPT | FE_DOWNWARD);
+  _FPU_SETCW (fpcr | round);
+}
+
+static __always_inline void
+libc_feholdsetround_vfp (fenv_t *envp, int round)
+{
+  fpu_control_t fpcr;
+
+  _FPU_GETCW (fpcr);
+  envp->__fpcr = fpcr;
+
+  /* Set new rounding mode if different.  */
+  if (__glibc_unlikely ((fpcr & FE_DOWNWARD) != round))
+    _FPU_SETCW ((fpcr & ~FE_DOWNWARD) | round);
+}
+
+static __always_inline void
+libc_feresetround_vfp (fenv_t *envp)
+{
+  fpu_control_t fpcr, round;
+
+  _FPU_GETCW (fpcr);
+
+  /* Check whether rounding modes are different.  */
+  round = (envp->__fpcr ^ fpcr) & FE_DOWNWARD;
+
+  /* Restore the rounding mode if it was changed.  */
+  if (__glibc_unlikely (round != 0))
+    _FPU_SETCW (fpcr ^ round);
+}
+
+static __always_inline int
+libc_fetestexcept_vfp (int ex)
+{
+  fpu_control_t fpsr;
+
+  _FPU_GETFPSR (fpsr);
+  fpsr = fpsr >> CAUSE_SHIFT;
+  return fpsr & ex & FE_ALL_EXCEPT;
+}
+
+static __always_inline void
+libc_fesetenv_vfp (const fenv_t *envp)
+{
+  fpu_control_t fpcr, fpsr, new_fpcr, new_fpsr;
+
+  _FPU_GETCW (fpcr);
+  _FPU_GETFPSR (fpsr);
+
+  new_fpcr = envp->__fpcr;
+  new_fpsr = envp->__fpsr;
+
+  if (__glibc_unlikely (fpsr ^ new_fpsr) != 0)
+    _FPU_SETFPSR (new_fpsr);
+
+  if (__glibc_unlikely (fpcr ^ new_fpcr) != 0)
+    _FPU_SETCW (new_fpcr);
+}
+
+static __always_inline int
+libc_feupdateenv_test_vfp (const fenv_t *envp, int ex)
+{
+  fpu_control_t fpcr, fpsr, new_fpcr, new_fpsr, excepts;
+
+  _FPU_GETCW (fpcr);
+  _FPU_GETFPSR (fpsr);
+
+  /* Merge current exception flags with the saved fenv.  */
+  excepts = (fpsr >> CAUSE_SHIFT) & FE_ALL_EXCEPT;
+  new_fpcr = envp->__fpcr;
+  new_fpsr = envp->__fpsr | (excepts << CAUSE_SHIFT);
+
+  /* Write FCR and FESR if different.  */
+  if (__glibc_unlikely (fpsr ^ new_fpsr) != 0)
+    _FPU_SETFPSR (new_fpsr);
+
+  if (__glibc_unlikely (fpcr ^ new_fpcr) != 0)
+    _FPU_SETCW (new_fpcr);
+
+  /* Raise the exceptions if enabled in the new FP state.  */
+  if (__glibc_unlikely (excepts & new_fpcr))
+    __feraiseexcept (excepts);
+
+  return excepts & ex;
+}
+
+static __always_inline void
+libc_feupdateenv_vfp (const fenv_t *envp)
+{
+  libc_feupdateenv_test_vfp (envp, 0);
+}
+
+static __always_inline void
+libc_feholdsetround_vfp_ctx (struct rm_ctx *ctx, int r)
+{
+  fpu_control_t fpcr, fpsr, round;
+
+  _FPU_GETCW (fpcr);
+  _FPU_GETFPSR (fpsr);
+  ctx->updated_status = false;
+  ctx->env.__fpcr = fpcr;
+  ctx->env.__fpsr = fpsr;
+
+  /* Check whether rounding modes are different.  */
+  round = (fpcr ^ r) & FE_DOWNWARD;
+
+  /* Set the rounding mode if changed.  */
+  if (__glibc_unlikely (round != 0))
+    {
+      ctx->updated_status = true;
+      _FPU_SETCW (fpcr ^ round);
+    }
+}
+
+static __always_inline void
+libc_feresetround_vfp_ctx (struct rm_ctx *ctx)
+{
+  /* Restore the rounding mode if updated.  */
+  if (__glibc_unlikely (ctx->updated_status))
+    {
+      fpu_control_t fpcr;
+
+      _FPU_GETCW (fpcr);
+      fpcr = (fpcr & ~FE_DOWNWARD) | (ctx->env.__fpcr & FE_DOWNWARD);
+      _FPU_SETCW (fpcr);
+    }
+}
+
+static __always_inline void
+libc_fesetenv_vfp_ctx (struct rm_ctx *ctx)
+{
+  fpu_control_t fpcr, fpsr, new_fpcr, new_fpsr;
+
+  _FPU_GETCW (fpcr);
+  _FPU_GETFPSR (fpsr);
+
+  new_fpcr = ctx->env.__fpcr;
+  new_fpsr = ctx->env.__fpsr;
+
+  if (__glibc_unlikely (fpsr ^ new_fpsr) != 0)
+    _FPU_SETFPSR (new_fpsr);
+
+  if (__glibc_unlikely (fpcr ^ new_fpcr) != 0)
+    _FPU_SETCW (new_fpcr);
+}
+
+#define libc_feholdexcept  libc_feholdexcept_vfp
+#define libc_feholdexceptf libc_feholdexcept_vfp
+#define libc_feholdexceptl libc_feholdexcept_vfp
+
+#define libc_fesetround  libc_fesetround_vfp
+#define libc_fesetroundf libc_fesetround_vfp
+#define libc_fesetroundl libc_fesetround_vfp
+
+#define libc_feresetround  libc_feresetround_vfp
+#define libc_feresetroundf libc_feresetround_vfp
+#define libc_feresetroundl libc_feresetround_vfp
+
+#define libc_feresetround_noex  libc_fesetenv_vfp
+#define libc_feresetround_noexf libc_fesetenv_vfp
+#define libc_feresetround_noexl libc_fesetenv_vfp
+
+#define libc_feholdexcept_setround  libc_feholdexcept_setround_vfp
+#define libc_feholdexcept_setroundf libc_feholdexcept_setround_vfp
+#define libc_feholdexcept_setroundl libc_feholdexcept_setround_vfp
+
+#define libc_feholdsetround  libc_feholdsetround_vfp
+#define libc_feholdsetroundf libc_feholdsetround_vfp
+#define libc_feholdsetroundl libc_feholdsetround_vfp
+
+#define libc_fetestexcept  libc_fetestexcept_vfp
+#define libc_fetestexceptf libc_fetestexcept_vfp
+#define libc_fetestexceptl libc_fetestexcept_vfp
+
+#define libc_fesetenv  libc_fesetenv_vfp
+#define libc_fesetenvf libc_fesetenv_vfp
+#define libc_fesetenvl libc_fesetenv_vfp
+
+#define libc_feupdateenv  libc_feupdateenv_vfp
+#define libc_feupdateenvf libc_feupdateenv_vfp
+#define libc_feupdateenvl libc_feupdateenv_vfp
+
+#define libc_feupdateenv_test  libc_feupdateenv_test_vfp
+#define libc_feupdateenv_testf libc_feupdateenv_test_vfp
+#define libc_feupdateenv_testl libc_feupdateenv_test_vfp
+
+/* We have support for rounding mode context.  */
+#define HAVE_RM_CTX 1
+
+#define libc_feholdsetround_ctx		libc_feholdsetround_vfp_ctx
+#define libc_feresetround_ctx		libc_feresetround_vfp_ctx
+#define libc_feresetround_noex_ctx	libc_fesetenv_vfp_ctx
+
+#define libc_feholdsetroundf_ctx	libc_feholdsetround_vfp_ctx
+#define libc_feresetroundf_ctx		libc_feresetround_vfp_ctx
+#define libc_feresetround_noexf_ctx	libc_fesetenv_vfp_ctx
+
+#define libc_feholdsetroundl_ctx	libc_feholdsetround_vfp_ctx
+#define libc_feresetroundl_ctx		libc_feresetround_vfp_ctx
+#define libc_feresetround_noexl_ctx	libc_fesetenv_vfp_ctx
+
+#include_next <fenv_private.h>
+
+#endif /* CSKY_FENV_PRIVATE_H */