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, 142 insertions, 0 deletions

diff --git a/sysdeps/csky/abiv2/memcmp.S b/sysdeps/csky/abiv2/memcmp.S
new file mode 100644
index 0000000000..d23f7e7b8f
--- /dev/null
+++ b/sysdeps/csky/abiv2/memcmp.S
@@ -0,0 +1,142 @@
+/* The assembly function for memory compare.  C-SKY ABIV2 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/>.  */
+
+#include <sysdep.h>
+
+ENTRY (memcmp)
+	/* Test if len less than 4 bytes.  */
+	mov	r3, r0
+	movi	r0, 0
+	mov	r12, r4
+	cmplti	r2, 4
+	jbt	.L_compare_by_byte
+
+	andi	r13, r0, 3
+	movi	r19, 4
+	/* Test if s1 is not 4 bytes aligned.  */
+	bnez	r13, .L_s1_not_aligned
+
+	LABLE_ALIGN
+.L_s1_aligned:
+	/* If dest is aligned, then copy.  */
+	zext	r18, r2, 31, 4
+	/* Test if len less than 16 bytes.  */
+	bez	r18, .L_compare_by_word
+
+.L_compare_by_4word:
+	/* If aligned, load word each time.  */
+	ldw	r20, (r3, 0)
+	ldw	r21, (r1, 0)
+	/* If s1[i] != s2[i], goto .L_byte_check.  */
+	cmpne	r20, r21
+	bt	.L_byte_check
+
+	ldw	r20, (r3, 4)
+	ldw	r21, (r1, 4)
+	cmpne	r20, r21
+	bt	.L_byte_check
+
+	ldw	r20, (r3, 8)
+	ldw	r21, (r1, 8)
+	cmpne	r20, r21
+	bt	.L_byte_check
+
+	ldw	r20, (r3, 12)
+	ldw	r21, (r1, 12)
+	cmpne	r20, r21
+	bt	.L_byte_check
+
+	PRE_BNEZAD (r18)
+	addi	a3, 16
+	addi	a1, 16
+
+	BNEZAD (r18, .L_compare_by_4word)
+
+.L_compare_by_word:
+	zext	r18, r2, 3, 2
+	bez	r18, .L_compare_by_byte
+.L_compare_by_word_loop:
+	ldw	r20, (r3, 0)
+	ldw	r21, (r1, 0)
+	addi	r3, 4
+	PRE_BNEZAD (r18)
+	cmpne	r20, r21
+	addi	r1, 4
+	bt	.L_byte_check
+	BNEZAD (r18, .L_compare_by_word_loop)
+
+.L_compare_by_byte:
+	zext	r18, r2, 1, 0
+	bez	r18, .L_return
+.L_compare_by_byte_loop:
+	ldb	r0, (r3, 0)
+	ldb	r4, (r1, 0)
+	addi	r3, 1
+	subu	r0, r4
+	PRE_BNEZAD (r18)
+	addi	r1, 1
+	bnez	r0, .L_return
+	BNEZAD (r18, .L_compare_by_byte_loop)
+
+.L_return:
+	mov	r4, r12
+	rts
+
+	/* s1[i] != s2[i] in word, so we check byte 3.  */
+.L_byte_check:
+	xtrb3	r0, r20
+	xtrb3	r2, r21
+	subu	r0, r2
+	bnez	r0, .L_return
+
+	/* check byte 2 */
+	xtrb2	r0, r20
+	xtrb2	r2, r21
+	subu	r0, r2
+	bnez	r0, .L_return
+
+	/* check byte 1 */
+	xtrb1	r0, r20
+	xtrb1	r2, r21
+	subu	r0, r2
+	bnez	r0, .L_return
+
+	/* check byte 0 */
+	xtrb0	r0, r20
+	xtrb0	r2, r21
+	subu	r0, r2
+	br	.L_return
+
+	/* Compare when s1 is not aligned.  */
+.L_s1_not_aligned:
+	sub	r13, r19, r13
+	sub	r2, r13
+.L_s1_not_aligned_loop:
+	ldb	r0, (r3, 0)
+	ldb	r4, (r1, 0)
+	addi	r3, 1
+	subu	r0, r4
+	PRE_BNEZAD (r13)
+	addi	r1, 1
+	bnez	r0, .L_return
+	BNEZAD (r13, .L_s1_not_aligned_loop)
+	br	.L_s1_aligned
+END (memcmp)
+weak_alias (memcmp, bcmp)
+libc_hidden_def (memcmp)
+.weak memcmp