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, 148 insertions, 0 deletions

diff --git a/sysdeps/csky/fpu_control.h b/sysdeps/csky/fpu_control.h
new file mode 100644
index 0000000000..20df77fab0
--- /dev/null
+++ b/sysdeps/csky/fpu_control.h
@@ -0,0 +1,148 @@
+/* FPU control word bits.  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 _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+/* C-SKY FPU floating point control register bits.
+
+   31-28  -> Reserved (read as 0, write with 0).
+   27     -> 0: Flush denormalized results to zero.
+             1: Flush denormalized results to signed minimal normal number.
+   26     -> Reserved (read as 0, write with 0).
+   25-24  -> Rounding control.
+   23-6   -> Reserved (read as 0, write with 0).
+    5     -> Enable exception for input denormalized exception.
+    4     -> Enable exception for inexact exception.
+    3     -> Enable exception for underflow exception.
+    2     -> Enable exception for overflow exception.
+    1     -> Enable exception for division by zero exception.
+    0     -> Enable exception for invalid operation exception.
+
+   Rounding Control:
+   00 - Rounding to nearest (RN).
+   01 - Rounding toward zero (RZ).
+   10 - Rounding (up) toward plus infinity (RP).
+   11 - Rounding (down)toward minus infinity (RM).
+
+   C-SKY FPU floating point exception status register bits.
+
+   15     -> Accumulate bit for any exception.
+   14     -> Reserved (read as 0, write with 0).
+   13     -> Cause bit for input denormalized exception.
+   12     -> Cause bit for inexact exception.
+   11     -> Cause bit for underflow exception.
+   10     -> Cause bit for overflow exception.
+    9     -> Cause bit for division by zero exception.
+    8     -> Cause bit for invalid operation exception.
+    7     -> Flag bit for any exception.
+    6     -> Reserved (read as 0, write with 0).
+    5     -> Flag exception for input denormalized exception.
+    4     -> Flag exception for inexact exception.
+    3     -> Flag exception for underflow exception.
+    2     -> Flag exception for overflow exception.
+    1     -> Flag exception for division by zero exception.
+    0     -> Flag exception for invalid operation exception.  */
+
+#include <features.h>
+
+#ifdef __csky_soft_float__
+
+# define _FPU_RESERVED 0xffffffff
+# define _FPU_DEFAULT  0x00000000
+typedef unsigned int fpu_control_t;
+# define _FPU_GETCW(cw) (cw) = 0
+# define _FPU_SETCW(cw) (void) (cw)
+# define _FPU_GETFPSR(cw) (cw) = 0
+# define _FPU_SETFPSR(cw) (void) (cw)
+extern fpu_control_t __fpu_control;
+
+#else /* __csky_soft_float__ */
+
+/* Masking of interrupts.  */
+# define _FPU_MASK_IDE     (1 << 5)  /* Input denormalized exception.  */
+# define _FPU_MASK_IXE     (1 << 4)  /* Inexact exception.  */
+# define _FPU_MASK_UFE     (1 << 3)  /* Underflow exception.  */
+# define _FPU_MASK_OFE     (1 << 2)  /* Overflow exception.  */
+# define _FPU_MASK_DZE     (1 << 1)  /* Division by zero exception.  */
+# define _FPU_MASK_IOE     (1 << 0)  /* Invalid operation exception.  */
+
+# define _FPU_MASK_FEA     (1 << 15) /* Case for any exception.  */
+# define _FPU_MASK_FEC     (1 << 7)  /* Flag for any exception.  */
+
+/* Flush denormalized numbers to zero.  */
+# define _FPU_FLUSH_TZ   0x8000000
+
+/* Rounding control.  */
+# define _FPU_RC_NEAREST (0x0 << 24)     /* RECOMMENDED.  */
+# define _FPU_RC_ZERO    (0x1 << 24)
+# define _FPU_RC_UP      (0x2 << 24)
+# define _FPU_RC_DOWN    (0x3 << 24)
+
+# define _FPU_RESERVED      0xf460ffc0  /* Reserved bits in cw.  */
+# define _FPU_FPSR_RESERVED 0xffff4040
+
+/* The fdlibm code requires strict IEEE double precision arithmetic,
+   and no interrupts for exceptions, rounding to nearest.  */
+
+# define _FPU_DEFAULT        0x00000000
+# define _FPU_FPSR_DEFAULT   0x00000000
+
+/* IEEE: same as above, but exceptions.  */
+# define _FPU_FPCR_IEEE     0x0000001F
+# define _FPU_FPSR_IEEE     0x00000000
+
+/* Type of the control word.  */
+typedef unsigned int fpu_control_t;
+
+/* Macros for accessing the hardware control word.  */
+# if (__CSKY__ == 2)
+#  define _FPU_GETCW(cw) __asm__ volatile ("mfcr %0, cr<1, 2>" : "=a" (cw))
+#  define _FPU_SETCW(cw) __asm__ volatile ("mtcr %0, cr<1, 2>" : : "a" (cw))
+#  define _FPU_GETFPSR(cw) __asm__ volatile ("mfcr %0, cr<2, 2>" : "=a" (cw))
+#  define _FPU_SETFPSR(cw) __asm__ volatile ("mtcr %0, cr<2, 2>" : : "a" (cw))
+# else
+#  define _FPU_GETCW(cw) __asm__ volatile ("1: cprcr  %0, cpcr2 \n"          \
+                                         "   btsti  %0, 31    \n"           \
+                                         "   bt     1b        \n"           \
+                                         "   cprcr  %0, cpcr1\n" : "=b" (cw))
+
+#  define _FPU_SETCW(cw) __asm__ volatile ("1: cprcr  r7, cpcr2 \n"          \
+                                         "   btsti  r7, 31    \n"           \
+                                         "   bt     1b        \n"           \
+                                         "   cpwcr  %0, cpcr1 \n"           \
+                                         : : "b" (cw) : "r7")
+
+#  define _FPU_GETFPSR(cw) __asm__ volatile ("1: cprcr  %0, cpcr2 \n"        \
+                                           "   btsti  %0, 31    \n"         \
+                                           "   bt     1b        \n"         \
+                                           "   cprcr  %0, cpcr4\n" : "=b" (cw))
+
+#  define _FPU_SETFPSR(cw) __asm__ volatile ("1: cprcr  r7, cpcr2 \n"        \
+                                           "   btsti  r7, 31    \n"         \
+                                           "   bt     1b        \n"         \
+                                           "   cpwcr %0, cpcr4  \n"         \
+                                           : : "b" (cw) : "r7")
+# endif /* __CSKY__ != 2 */
+
+/* Default control word set at startup.  */
+extern fpu_control_t __fpu_control;
+
+#endif /* !__csky_soft_float__ */
+
+#endif /* fpu_control.h */