about summary refs log tree commit diff
path: root/sysdeps/alpha/alphaev67
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/alpha/alphaev67')
-rw-r--r--sysdeps/alpha/alphaev67/Implies1
-rw-r--r--sysdeps/alpha/alphaev67/ffs.S50
-rw-r--r--sysdeps/alpha/alphaev67/ffsll.S45
-rw-r--r--sysdeps/alpha/alphaev67/rawmemchr.S93
-rw-r--r--sysdeps/alpha/alphaev67/stpcpy.S52
-rw-r--r--sysdeps/alpha/alphaev67/stpncpy.S116
-rw-r--r--sysdeps/alpha/alphaev67/strcat.S62
-rw-r--r--sysdeps/alpha/alphaev67/strchr.S101
-rw-r--r--sysdeps/alpha/alphaev67/strlen.S61
-rw-r--r--sysdeps/alpha/alphaev67/strncat.S101
10 files changed, 682 insertions, 0 deletions
diff --git a/sysdeps/alpha/alphaev67/Implies b/sysdeps/alpha/alphaev67/Implies
new file mode 100644
index 0000000000..49d19c4ad8
--- /dev/null
+++ b/sysdeps/alpha/alphaev67/Implies
@@ -0,0 +1 @@
+alpha/alphaev6
diff --git a/sysdeps/alpha/alphaev67/ffs.S b/sysdeps/alpha/alphaev67/ffs.S
new file mode 100644
index 0000000000..a6e887766d
--- /dev/null
+++ b/sysdeps/alpha/alphaev67/ffs.S
@@ -0,0 +1,50 @@
+/* Copyright (C) 2000 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Finds the first bit set in an integer.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noreorder
+	.set noat
+
+
+ENTRY(__ffs)
+#ifdef PROF
+	ldgp	gp, 0(pv)
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.prologue 1
+#else
+	.prologue 0
+#endif
+
+	zap	$16, 0xF0, $16
+	cttz	$16, $0
+	addq	$0, 1, $0
+	cmoveq	$16, 0, $0
+
+	nop
+	nop
+	nop
+	ret
+
+END(__ffs)
+
+weak_alias (__ffs, ffs)
diff --git a/sysdeps/alpha/alphaev67/ffsll.S b/sysdeps/alpha/alphaev67/ffsll.S
new file mode 100644
index 0000000000..b7556496a3
--- /dev/null
+++ b/sysdeps/alpha/alphaev67/ffsll.S
@@ -0,0 +1,45 @@
+/* Copyright (C) 2000 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Finds the first bit set in a long.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noreorder
+	.set noat
+
+ENTRY(ffsl)
+#ifdef PROF
+	ldgp	gp, 0(pv)
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.prologue 1
+#else
+	.prologue 0
+#endif
+
+	cttz	$16, $0
+	addq	$0, 1, $0
+	cmoveq	$16, 0, $0
+	ret
+
+END(ffsl)
+
+weak_extern (ffsl)
+weak_alias (ffsl, ffsll)
diff --git a/sysdeps/alpha/alphaev67/rawmemchr.S b/sysdeps/alpha/alphaev67/rawmemchr.S
new file mode 100644
index 0000000000..6626ecc892
--- /dev/null
+++ b/sysdeps/alpha/alphaev67/rawmemchr.S
@@ -0,0 +1,93 @@
+/* Copyright (C) 2000 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Return pointer to first occurrence of CH in STR.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noreorder
+	.set noat
+
+ENTRY(__rawmemchr)
+#ifdef PROF
+	ldgp	gp, 0(pv)
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.prologue 1
+#else
+	.prologue 0
+#endif
+
+	ldq_u   t0, 0(a0)	# L : load first quadword Latency=3
+	and	a1, 0xff, t3	# E : 00000000000000ch
+	insbl	a1, 1, t5	# U : 000000000000ch00
+	insbl	a1, 7, a2	# U : ch00000000000000
+
+	insbl	t3, 6, a3	# U : 00ch000000000000
+	or	t5, t3, a1	# E : 000000000000chch
+	andnot  a0, 7, v0	# E : align our loop pointer
+	lda	t4, -1		# E : build garbage mask
+
+	mskqh	t4, a0, t4	# U : only want relevant part of first quad
+	or	a2, a3, a2	# E : chch000000000000
+	inswl	a1, 2, t5	# E : 00000000chch0000
+	inswl	a1, 4, a3	# E : 0000chch00000000
+
+	or	a1, a2, a1	# E : chch00000000chch
+	or	a3, t5, t5	# E : 0000chchchch0000
+	cmpbge	zero, t4, t4	# E : bits set iff byte is garbage
+	nop			# E :
+
+	/* This quad is _very_ serialized.  Lots of stalling happens */
+	or	t5, a1, a1	# E : chchchchchchchch
+	xor	t0, a1, t1	# E : make bytes == c zero
+	cmpbge  zero, t1, t0	# E : bits set iff byte == c
+	andnot	t0, t4, t0	# E : clear garbage bits
+
+	cttz	t0, a2		# U0 : speculative (in case we get a match)
+	nop			# E :
+	nop			# E :
+	bne	t0, $found	# U :
+
+	/*
+	 * Yuk.  This loop is going to stall like crazy waiting for the
+	 * data to be loaded.  Not much can be done about it unless it's
+	 * unrolled multiple times, which is generally unsafe.
+	 */
+$loop:
+	ldq	t0, 8(v0)	# L : Latency=3
+	addq	v0, 8, v0	# E :
+	xor	t0, a1, t1	# E :
+	cmpbge	zero, t1, t0	# E : bits set iff byte == c
+
+	cttz	t0, a2		# U0 : speculative (in case we get a match)
+	nop			# E :
+	nop			# E :
+	beq	t0, $loop	# U :
+
+$found:
+	negq    t0, t1		# E : clear all but least set bit
+	and     t0, t1, t0	# E :
+	addq	v0, a2, v0	# E : Add in the bit number from above
+	ret			# L0 :
+
+	END(__rawmemchr)
+
+weak_alias (__rawmemchr, rawmemchr)
diff --git a/sysdeps/alpha/alphaev67/stpcpy.S b/sysdeps/alpha/alphaev67/stpcpy.S
new file mode 100644
index 0000000000..6dcb36659a
--- /dev/null
+++ b/sysdeps/alpha/alphaev67/stpcpy.S
@@ -0,0 +1,52 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson <rth@redhat.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/*  Copy SRC to DEST returning the address of the terminating 0 in DEST.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noreorder
+	.set noat
+	.text
+
+ENTRY(__stpcpy)
+	ldgp	gp, 0(pv)
+#ifdef PROF
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+#endif
+	.prologue 1
+
+	.align 4
+	mov	a0, v0
+	nop
+	jsr	t9, __stxcpy
+
+        # t8  = bitmask (with one bit set) indicating the last byte written
+        # a0  = unaligned address of the last *word* written
+
+	cttz	t8, t8
+	andnot	a0, 7, a0
+        addq    a0, t8, v0
+	ret
+
+	END(__stpcpy)
+
+weak_alias (__stpcpy, stpcpy)
diff --git a/sysdeps/alpha/alphaev67/stpncpy.S b/sysdeps/alpha/alphaev67/stpncpy.S
new file mode 100644
index 0000000000..d648b4db8b
--- /dev/null
+++ b/sysdeps/alpha/alphaev67/stpncpy.S
@@ -0,0 +1,116 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   Contributed by Richard Henderson (rth@redhat.com)
+
+   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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Copy no more then N bytes from SRC to DEST, returning the address of
+   the terminating '\0' in DEST.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noat
+	.set noreorder
+	.text
+
+ENTRY(__stpncpy)
+	ldgp	gp, 0(pv)
+#ifdef PROF
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+#endif
+	.prologue 1
+
+	mov	a0, v0
+	beq	a2, $zerocount
+
+	.align 4
+	nop
+	nop
+	jsr	t9, __stxncpy	# do the work of the copy
+
+	cttz	t8, t4
+	zapnot	t0, t8, t5
+	andnot	a0, 7, a0
+	bne	a2, $multiword	# do we have full words left?
+
+	subq	t8, 1, t2
+	subq	t10, 1, t3
+	cmpult	zero, t5, t5
+	addq	a0, t4, v0
+
+	or	t2, t8, t2
+	or	t3, t10, t3
+	addq	v0, t5, v0
+	andnot	t3, t2, t3
+
+	zap	t0, t3, t0
+	nop
+	stq	t0, 0(a0)
+	ret
+
+$multiword:
+	subq	t8, 1, t7	# clear the final bits in the prev word
+	cmpult	zero, t5, t5
+	or	t7, t8, t7
+	zapnot	t0, t7, t0
+
+	subq	a2, 1, a2
+	stq	t0, 0(a0)
+	addq	a0, 8, a1
+	beq	a2, 1f		# loop over full words remaining
+
+	nop
+	nop
+	nop
+	blbc	a2, 0f
+
+	stq	zero, 0(a1)
+	subq	a2, 1, a2
+	addq	a1, 8, a1
+	beq	a2, 1f
+
+0:	stq	zero, 0(a1)
+	subq	a2, 2, a2
+	nop
+	nop
+
+	stq	zero, 8(a1)
+	addq	a1, 16, a1
+	nop
+	bne	a2, 0b
+
+1:	ldq	t0, 0(a1)	# clear the leading bits in the final word
+	subq	t10, 1, t7
+	addq	a0, t4, v0
+	nop
+
+	or	t7, t10, t7
+	addq	v0, t5, v0
+	zap	t0, t7, t0
+	stq	t0, 0(a1)
+
+$zerocount:
+	nop
+	nop
+	nop
+	ret
+
+	END(__stpncpy)
+
+weak_alias (__stpncpy, stpncpy)
diff --git a/sysdeps/alpha/alphaev67/strcat.S b/sysdeps/alpha/alphaev67/strcat.S
new file mode 100644
index 0000000000..88e48cec71
--- /dev/null
+++ b/sysdeps/alpha/alphaev67/strcat.S
@@ -0,0 +1,62 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@tamu.edu>, 1996.
+   EV67 optimized by Rick Gorton <rick.gorton@alpha-processor.com>.
+
+   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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Append a null-terminated string from SRC to DST.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noreorder
+	.text
+
+ENTRY(strcat)
+	ldgp	gp, 0(pv)
+#ifdef PROF
+	.set noat
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.set at
+#endif
+	.prologue 1
+
+	mov	$16, $0		# E : set up return value
+	/* Find the end of the string.  */
+	ldq_u   $1, 0($16)	# L : load first quadword (a0 may be misaligned)
+	lda     $2, -1		# E :
+	insqh   $2, $16, $2	# U :
+
+	andnot  $16, 7, $16	# E :
+	or      $2, $1, $1	# E :
+	cmpbge  $31, $1, $2	# E : bits set iff byte == 0
+	bne     $2, $found	# U :
+
+$loop:	ldq     $1, 8($16)	# L :
+	addq    $16, 8, $16	# E :
+	cmpbge  $31, $1, $2	# E :
+	beq     $2, $loop	# U :
+
+$found:	cttz	$2, $3		# U0 :
+	addq	$16, $3, $16	# E :
+	/* Now do the append.  */
+	mov	$26, $23	# E :
+	jmp	$31, __stxcpy	# L0 :
+
+	END(strcat)
diff --git a/sysdeps/alpha/alphaev67/strchr.S b/sysdeps/alpha/alphaev67/strchr.S
new file mode 100644
index 0000000000..3ab26556cd
--- /dev/null
+++ b/sysdeps/alpha/alphaev67/strchr.S
@@ -0,0 +1,101 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@tamu.edu>, 1996.
+   EV67 optimized by Rick Gorton <rick.gorton@alpha-processor.com>.
+
+   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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Return the address of a given character within a null-terminated
+   string, or null if it is not found.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noreorder
+	.set noat
+
+ENTRY(strchr)
+#ifdef PROF
+	ldgp	gp, 0(pv)
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.prologue 1
+#else
+	.prologue 0
+#endif
+
+	ldq_u   t0, 0(a0)	# L : load first quadword Latency=3
+	and	a1, 0xff, t3	# E : 00000000000000ch
+	insbl	a1, 1, t5	# U : 000000000000ch00
+	insbl	a1, 7, a2	# U : ch00000000000000
+
+	insbl	t3, 6, a3	# U : 00ch000000000000
+	or	t5, t3, a1	# E : 000000000000chch
+	andnot  a0, 7, v0	# E : align our loop pointer
+	lda	t4, -1		# E : build garbage mask
+
+	mskqh	t4, a0, t4	# U : only want relevant part of first quad
+	or	a2, a3, a2	# E : chch000000000000
+	inswl	a1, 2, t5	# E : 00000000chch0000
+	inswl	a1, 4, a3	# E : 0000chch00000000
+
+	or	a1, a2, a1	# E : chch00000000chch
+	or	a3, t5, t5	# E : 0000chchchch0000
+	cmpbge  zero, t0, t2	# E : bits set iff byte == zero
+	cmpbge	zero, t4, t4	# E : bits set iff byte is garbage
+
+	/* This quad is _very_ serialized.  Lots of stalling happens */
+	or	t5, a1, a1	# E : chchchchchchchch
+	xor	t0, a1, t1	# E : make bytes == c zero
+	cmpbge  zero, t1, t3	# E : bits set iff byte == c
+	or	t2, t3, t0	# E : bits set iff char match or zero match
+
+	andnot	t0, t4, t0	# E : clear garbage bits
+	cttz	t0, a2		# U0 : speculative (in case we get a match)
+	nop			# E :
+	bne	t0, $found	# U :
+
+	/*
+	 * Yuk.  This loop is going to stall like crazy waiting for the
+	 * data to be loaded.  Not much can be done about it unless it's
+	 * unrolled multiple times, which is generally unsafe.
+	 */
+$loop:
+	ldq	t0, 8(v0)	# L : Latency=3
+	addq	v0, 8, v0	# E :
+	xor	t0, a1, t1	# E :
+	cmpbge	zero, t0, t2	# E : bits set iff byte == 0
+
+	cmpbge	zero, t1, t3	# E : bits set iff byte == c
+	or	t2, t3, t0	# E :
+	cttz	t3, a2		# U0 : speculative (in case we get a match)
+	beq	t0, $loop	# U :
+
+$found:
+	negq    t0, t1		# E : clear all but least set bit
+	and     t0, t1, t0	# E :
+	and	t0, t3, t1	# E : bit set iff byte was the char
+	addq	v0, a2, v0	# E : Add in the bit number from above
+
+	cmoveq	t1, $31, v0	# E : Two mapping slots, latency = 2
+	nop
+	nop
+	ret			# L0 :
+
+	END(strchr)
+
+weak_alias (strchr, index)
diff --git a/sysdeps/alpha/alphaev67/strlen.S b/sysdeps/alpha/alphaev67/strlen.S
new file mode 100644
index 0000000000..ac8740fb09
--- /dev/null
+++ b/sysdeps/alpha/alphaev67/strlen.S
@@ -0,0 +1,61 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   Contributed by David Mosberger (davidm@cs.arizona.edu).
+   EV67 optimized by Rick Gorton <rick.gorton@alpha-processor.com>.
+
+   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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Finds length of a 0-terminated string.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noreorder
+	.set noat
+
+ENTRY(strlen)
+#ifdef PROF
+	ldgp	gp, 0(pv)
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.prologue 1
+#else
+	.prologue 0
+#endif
+
+	ldq_u	$1, 0($16)	# L : load first quadword ($16 may be misaligned)
+	lda	$2, -1($31)	# E :
+	insqh	$2, $16, $2	# U :
+	andnot	$16, 7, $0	# E :
+
+	or	$2, $1, $1	# E :
+	cmpbge	$31, $1, $2	# E : $2  <- bitmask: bit i == 1 <==> i-th byte == 0
+	nop			# E :
+	bne	$2, $found	# U :
+
+$loop:	ldq	$1, 8($0)	# L :
+	addq	$0, 8, $0	# E : addr += 8
+	cmpbge	$31, $1, $2	# E :
+	beq	$2, $loop	# U :
+
+$found:
+	cttz	$2, $3		# U0 :
+	addq	$0, $3, $0	# E :
+	subq	$0, $16, $0	# E :
+	ret	$31, ($26)	# L0 :
+
+	END(strlen)
diff --git a/sysdeps/alpha/alphaev67/strncat.S b/sysdeps/alpha/alphaev67/strncat.S
new file mode 100644
index 0000000000..4d199d95fe
--- /dev/null
+++ b/sysdeps/alpha/alphaev67/strncat.S
@@ -0,0 +1,101 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@tamu.edu>, 1996.
+   EV67 optimized by Rick Gorton <rick.gorton@alpha-processor.com>.
+
+   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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Append no more than COUNT characters from the null-terminated string SRC
+   to the null-terminated string DST.  Always null-terminate the new DST.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noreorder
+	.text
+
+ENTRY(strncat)
+	ldgp	gp, 0(pv)
+#ifdef PROF
+	.set noat
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.set at
+#endif
+	.prologue 1
+
+	mov	$16, $0		# set up return value
+	beq	$18, $zerocount	# U :
+	/* Find the end of the string.  */
+	ldq_u   $1, 0($16)	# L : load first quadword ($16 may be misaligned)
+	lda     $2, -1($31)	# E :
+
+	insqh   $2, $0, $2	# U :
+	andnot  $16, 7, $16	# E :
+	nop			# E :
+	or      $2, $1, $1	# E :
+
+	nop			# E :
+	nop			# E :
+	cmpbge  $31, $1, $2	# E : bits set iff byte == 0
+	bne     $2, $found	# U :
+
+$loop:	ldq     $1, 8($16)	# L :
+	addq    $16, 8, $16	# E :
+	cmpbge  $31, $1, $2	# E :
+	beq     $2, $loop	# U :
+
+$found:	cttz	$2, $3		# U0 :
+	addq	$16, $3, $16	# E :
+	jsr	$23, __stxncpy	# L0 :/* Now do the append.  */
+
+	/* Worry about the null termination.  */
+
+	zapnot	$1, $27, $2	# U : was last byte a null?
+	cmplt	$27, $24, $5	# E : did we fill the buffer completely?
+	bne	$2, 0f		# U :
+	ret			# L0 :
+
+0:	or	$5, $18, $2	# E :
+	nop
+	bne	$2, 2f		# U :
+	and	$24, 0x80, $3	# E : no zero next byte
+
+	nop			# E :
+	bne	$3, 1f		# U :
+	/* Here there are bytes left in the current word.  Clear one.  */
+	addq	$24, $24, $24	# E : end-of-count bit <<= 1
+	nop			# E :
+
+2:	zap	$1, $24, $1	# U :
+	nop			# E :
+	stq_u	$1, 0($16)	# L :
+	ret			# L0 :
+
+1:	/* Here we must clear the first byte of the next DST word */
+	stb	$31, 8($16)	# L :
+	nop			# E :
+	nop			# E :
+	ret			# L0 :
+
+$zerocount:
+	nop			# E :
+	nop			# E :
+	nop			# E :
+	ret			# L0 :
+
+	END(strncat)
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-07-25 23:51:19 +0000