entered into RCS

This commit is contained in:
Roland McGrath 1992-05-13 02:52:32 +00:00
parent fc6606f14b
commit a238abcb88
23 changed files with 1787 additions and 0 deletions

57
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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)bcmp.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/* bcmp(s1, s2, n) */
#include "DEFS.h"
ENTRY(bcmp, 0)
movl 4(ap),r1
movl 8(ap),r3
movl 12(ap),r4
1:
movzwl $65535,r0
cmpl r4,r0
jleq 2f
subl2 r0,r4
cmpc3 r0,(r1),(r3)
jeql 1b
addl2 r4,r0
ret
2:
cmpc3 r4,(r1),(r3)
ret

78
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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)bcopy.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/* bcopy(from, to, size) */
#include "DEFS.h"
ENTRY(bcopy, R6)
movl 4(ap),r1
movl 8(ap),r3
movl 12(ap),r6
cmpl r1,r3
bgtr 2f # normal forward case
blss 3f # overlapping, must do backwards
ret # equal, nothing to do
1:
subl2 r0,r6
movc3 r0,(r1),(r3)
2:
movzwl $65535,r0
cmpl r6,r0
jgtr 1b
movc3 r6,(r1),(r3)
ret
3:
addl2 r6,r1
addl2 r6,r3
movzwl $65535,r0
jbr 5f
4:
subl2 r0,r6
subl2 r0,r1
subl2 r0,r3
movc3 r0,(r1),(r3)
movzwl $65535,r0
subl2 r0,r1
subl2 r0,r3
5:
cmpl r6,r0
jgtr 4b
subl2 r6,r1
subl2 r6,r3
movc3 r6,(r1),(r3)
ret

53
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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)bzero.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/* bzero(base, length) */
#include "DEFS.h"
ENTRY(bzero, 0)
movl 4(ap),r3
jbr 2f
1:
subl2 r0,8(ap)
movc5 $0,(r3),$0,r0,(r3)
2:
movzwl $65535,r0
cmpl 8(ap),r0
jgtr 1b
movc5 $0,(r3),$0,8(ap),(r3)
ret

48
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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)ffs.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/* bit = ffs(value) */
#include "DEFS.h"
ENTRY(ffs, 0)
ffs $0,$32,4(ap),r0
bneq 1f
mnegl $1,r0
1:
incl r0
ret

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/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)index.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/*
* Find the first occurence of c in the string cp.
* Return pointer to match or null pointer.
*
* char *
* index(cp, c)
* char *cp, c;
*/
#include "DEFS.h"
ENTRY(index, 0)
movq 4(ap),r1 # r1 = cp; r2 = c
tstl r2 # check for special case c == '\0'
bneq 2f
1:
locc $0,$65535,(r1) # just find end of string
beql 1b # still looking
movl r1,r0 # found it
ret
2:
moval tbl,r3 # r3 = address of table
bbss $0,(r3),5f # insure not reentering
movab (r3)[r2],r5 # table entry for c
incb (r5)
movzwl $65535,r4 # fast access
3:
scanc r4,(r1),(r3),$1 # look for c or '\0'
beql 3b # still looking
movl r1,r0 # return pointer to char
tstb (r0) # if have found '\0'
bneq 4f
clrl r0 # else return 0
4:
clrb (r5) # clean up table
clrb (r3)
ret
.data
tbl: .space 256
.text
/*
* Reentrant, but slower version of index
*/
5:
movl r1,r3
6:
locc $0,$65535,(r3) # look for '\0'
bneq 7f
locc r2,$65535,(r3) # look for c
bneq 8f
movl r1,r3 # reset pointer and ...
jbr 6b # ... try again
7:
subl3 r3,r1,r4 # length of short block
incl r4 # +1 for '\0'
locc r2,r4,(r3) # look for c
bneq 8f
ret
8:
movl r1,r0 # return pointer to char
ret

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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)memchr.s 5.1 (Berkeley) 5/29/90"
#endif /* LIBC_SCCS and not lint */
/*
* Find the first occurence of c in the memory at cp (length n).
* Return pointer to match or null pointer.
*
* This code optimises the usual case (0 < n < 65535).
*
* void *
* memchr(cp, c, n)
* char *cp, c;
* size_t n;
*/
#include "DEFS.h"
ENTRY(memchr, 0)
movq 4(ap),r1 # r1 = cp; r2 = c
movl 12(ap),r0 # r0 = n
movzwl $65535,r4 # handy constant
0:
cmpl r0,r4 # check for annoying locc limit
bgtru 3f
/* n <= 65535 */
locc r2,r0,(r1) # search n bytes for c
beql 2f # done if not found (r0 already 0)
1: /* found character c at (r1) */
movl r1,r0
2:
ret
3: /* n > 65535 */
locc r2,r4,(r1) # search 65535 bytes for c
beql 1b # done if found
decw r0 # from 0 to 65535
subl2 r0,r4 # adjust n
brb 0b # and loop

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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)memcmp.s 5.1 (Berkeley) 5/15/90"
#endif /* LIBC_SCCS and not lint */
/* int memcmp(s1, s2, n) */
#include "DEFS.h"
ENTRY(memcmp, 0)
movl 4(ap),r1 /* r1 = s1 */
movq 8(ap),r3 /* r3 = s2; r4 = n */
movzwl $65535,r5
0:
cmpl r4,r5
jgtru 3f /* handle stupid cmpc3 limitation */
cmpc3 r4,(r1),(r3) /* compare */
beql 2f /* done if same (r0 = 0) */
1:
movzbl (r1),r0
movzbl (r3),r2
subl2 r2,r0 /* return *s1 - *s2; s1,s2 unsigned chars */
2:
ret
3:
subl2 r5,r4 /* do 64K; adjust count */
cmpc3 r5,(r1),(r3)
jeql 0b /* loop if same */
jbr 1b

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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)memmove.s 5.1 (Berkeley) 5/15/90"
#endif /* LIBC_SCCS and not lint */
/*
* void *memmove(dst, src, size)
* returns dst
*
* This optimises the usual case (count < 65536) at the expense
* of some extra memory references and branches when count >= 65536.
*/
#include "DEFS.h"
ENTRY(memmove, 0)
movzwl $65535,r0 /* r0 = 64K (needed below) */
movq 8(ap),r1 /* r1 = src, r2 = length */
movl 4(ap),r3 /* r3 = dst */
cmpl r1,r3
bgtru 1f /* normal forward case */
beql 2f /* equal, nothing to do */
addl2 r2,r1 /* overlaps iff src<dst but src+len>dst */
cmpl r1,r3
bgtru 4f /* overlapping, must move backwards */
subl2 r2,r1
1: /* move forward */
cmpl r2,r0
bgtru 3f /* stupid movc3 limitation */
movc3 r2,(r1),(r3) /* move it all */
2:
movl 4(ap),r0 /* return original dst */
ret
3:
subl2 r0,12(ap) /* adjust length by 64K */
movc3 r0,(r1),(r3) /* move 64K */
movl 12(ap),r2
decw r0 /* from 0 to 65535 */
brb 1b /* retry */
4: /* move backward */
addl2 r2,r3
5:
cmpl r2,r0
bgtru 6f /* stupid movc3 limitation */
subl2 r2,r1
subl2 r2,r3
movc3 r2,(r1),(r3) /* move it all */
movl 4(ap),r0 /* return original dst */
ret
6:
subl2 r0,12(ap) /* adjust length by 64K */
subl2 r0,r1
subl2 r0,r3
movc3 r0,(r1),(r3) /* move 64K */
movl 12(ap),r2
decw r0
subl2 r0,r1
subl2 r0,r3
brb 5b

55
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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)memset.s 5.2 (Berkeley) 5/12/91"
#endif /* LIBC_SCCS and not lint */
/* void *memset(base, c, length) */
#include "DEFS.h"
ENTRY(memset, 0)
movl 4(ap),r3
1:
movzwl $65535,r0
movq 8(ap),r1
cmpl r2,r0
jgtru 2f
movc5 $0,(r3),r1,r2,(r3)
movl r1,r0
ret
2:
subl2 r0,12(ap)
movc5 $0,(r3),r1,r0,(r3)
jbr 1b

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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)rindex.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/*
* Find the last occurence of c in the string cp.
* Return pointer to match or null pointer.
*
* char *
* rindex(cp, c)
* char *cp, c;
*/
#include "DEFS.h"
ENTRY(rindex, 0)
movq 4(ap),r1 # r1 = cp; r2 = c
tstl r2 # check for special case c == '\0'
bneq 2f
1:
locc $0,$65535,(r1) # just find end of string
beql 1b # still looking
movl r1,r0 # found it
ret
2:
moval tbl,r3 # r3 = address of table
bbss $0,(r3),5f # insure not reentering
movab (r3)[r2],r5 # table entry for c
incb (r5)
clrl r4 # last found
3:
scanc $65535,(r1),(r3),$1 # look for c or '\0'
beql 3b # keep looking
tstb (r1) # if have found '\0'
beql 4f # we are done
movl r1,r4 # save most recently found
incl r1 # skip over character
jbr 3b # keep looking
4:
movl r4,r0 # return last found (if any)
clrb (r5) # clean up table
clrb (r3)
ret
.data
tbl: .space 256
.text
/*
* Reentrant, but slower version of rindex
*/
5:
movl r1,r3
clrl r4 # r4 = pointer to last match
6:
locc $0,$65535,(r3) # look for '\0'
bneq 8f
decw r0 # r0 = 65535
1:
locc r2,r0,(r3) # look for c
bneq 7f
movl r1,r3 # reset pointer and ...
jbr 6b # ... try again
7:
movl r1,r4 # stash pointer ...
addl3 $1,r1,r3 # ... skip over match and ...
decl r0 # ... decrement count
jbr 6b # ... try again
8:
subl3 r3,r1,r0 # length of short block
incl r0 # +1 for '\0'
9:
locc r2,r0,(r3) # look for c
beql 0f
movl r1,r4 # stash pointer ...
addl3 $1,r1,r3 # ... skip over match ...
decl r0 # ... adjust count and ...
jbr 9b # ... try again
0:
movl r4,r0 # return stashed pointer
ret

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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strcat.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/*
* Concatenate string s2 to the end of s1
* and return the base of s1.
*
* char *
* strcat(s1, s2)
* char *s1, *s2;
*/
#include "DEFS.h"
ENTRY(strcat, R6|R7)
movq 4(ap), r6 # r6 = s1; r7 = s2
movl r6,r1
0:
locc $0,$65535,(r1) # look for '\0'
beql 0b
movl r1,r3 # save end of s1
1:
locc $0,$65535,(r7) # find length of s2
bneq 2f
movc3 $65535,(r7),(r3)# copy full block
movl r1,r7
jbr 1b
2:
subl2 r7,r1 # calculate length
incl r1
movc3 r1,(r7),(r3) # copy remainder
movl r6,r0
ret

105
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/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strchr.s 5.4 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/*
* Find the first occurence of c in the string cp.
* Return pointer to match or null pointer.
*
* char *
* strchr(cp, c)
* char *cp, c;
*/
#include "DEFS.h"
.lcomm tbl,256
ENTRY(strchr, 0)
movzwl $65535,r4 /* handy constant */
movq 4(ap),r1 /* r1 = cp; r2 = c */
movzbl r2,r2
beql Lzero /* special case for c == '\0' */
/*
* Fancy scanc version. Alas, it is not reentrant.
*/
movab tbl,r3 /* r3 = base of table */
bbss $0,(r3),Lreent /* ensure not reentering */
movab (r3)[r2],r5
incb (r5) /* mark both '\0' and c */
0:
scanc r4,(r1),(r3),$1 /* look for c or '\0' */
beql 0b /* still looking */
movl r1,r0 /* return whatever we found */
tstb (r0)
bneq 1f # unless it was '\0':
clrl r0 # then return NULL
1:
clrb (r5) /* clean up table */
clrb (r3)
ret
/*
* Special case for \0.
*/
Lzero:
locc r2,r4,(r1) /* just find end of string */
beql Lzero /* still looking */
movl r1,r0 /* found it */
ret
/*
* Slower reentrant version is two two-step searches. The first
* phase runs until we know where the string ends; it locates the
* first occurrence of c within a 65535-byte block. If we find
* the end of the string first, we switch to the second phase,
* were we look only up to the known end of string.
*/
Lreent:
0: /* first phase */
movl r1,r3
locc $0,r4,(r3) /* look for '\0' */
bneq 1f
locc r2,r4,(r3) /* look for c */
beql 0b /* not found: reset pointer and loop */
movl r1,r0 /* found: return it */
ret
1: /* second phase */
subl3 r3,r1,r0 /* length of short block */
locc r2,r0,(r3) /* look for c */
beql 2f /* not found: return NULL */
movl r1,r0
2: ret

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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strcpy.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/*
* Copy string s2 over top of s1.
* Return base of s1.
*
* char *
* strcpy(s1, s2)
* char *s1, *s2;
*/
#include "DEFS.h"
ENTRY(strcpy, R6)
movl 4(ap), r3 # r3 = s1
movl 8(ap), r6 # r6 = s2
1:
locc $0,$65535,(r6) # find length of s2
bneq 2f
movc3 $65535,(r6),(r3)# copy full block
movl r1,r6
jbr 1b
2:
subl2 r6,r1 # calculate length
incl r1
movc3 r1,(r6),(r3) # copy remainder
movl 4(ap),r0 # return base of s1
ret

66
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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strcspn.s 5.1 (Berkeley) 5/15/90"
#endif /* LIBC_SCCS and not lint */
/*
* Span the complement of string s2 (skip characters that are not in s2).
* Return the number of characters in s1 that were skipped.
*
* size_t
* strcspn(s1, s2)
* const char *s1, *s2;
*/
#include "DEFS.h"
ENTRY(strcspn, 0)
subl2 $32,sp /* make 256 bit table */
movc5 $0,(sp),$0,$32,(sp)
movq 4(ap),r1 /* r1 = s1, r2 = s2 */
/* turn on bit for each character in s2, including '\0' */
1:
movzbl (r2)+,r0
bbss r0,(sp),1b
bneq 1b
movl r1,r0 /* r0 = s (current pos in s1) */
/* look for a character that is in s2 */
2:
movzbl (r0)+,r2 /* c = *s++ */
bbc r2,(sp),2b /* loop until c is in table */
decl r0 /* s-- */
subl2 r1,r0 /* r0 = s - s1 = count */
ret

52
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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strlen.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/*
* Return the length of cp (not counting '\0').
*
* strlen(cp)
* char *cp;
*/
#include "DEFS.h"
ENTRY(strlen, 0)
movl 4(ap),r1
1:
locc $0,$65535,(r1) # look for '\0'
beql 1b
subl3 4(ap),r1,r0 # len = cp - base
ret

83
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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strncat.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/*
* Concatenate string s2 on the end of s1
* and return the base of s1. The parameter
* n is the maximum length of string s2 to
* concatenate.
*
* char *
* strncat(s1, s2, n)
* char *s1, *s2;
* int n;
*/
#include "DEFS.h"
ENTRY(strncat, R6)
movl 12(ap),r6 # r6 = n
bleq done # n <= 0
movl 4(ap),r3 # r3 = s1
movl r3,r1
0:
locc $0,$65535,(r1)
beql 0b
movl r1,r3 # r3 = index(s1, '\0');
movl 8(ap),r1 # r1 = s2
1:
movzwl $65535,r2 # r2 = bytes in first chunk
cmpl r6,r2 # r2 = min(bytes in chunk, n);
jgeq 2f
movl r6,r2
2:
subl2 r2,r6 # update n
locc $0,r2,(r1) # '\0' found?
jneq 3f
subl2 r2,r1 # back up pointer updated by locc
movc3 r2,(r1),(r3) # copy in next piece
tstl r6 # run out of space?
jneq 1b
clrb (r3) # force '\0' termination
jbr done
3:
subl2 r0,r2 # r2 = number of bytes to move
subl2 r2,r1 # back up pointer updated by locc
incl r2 # copy '\0' as well
movc3 r2,(r1),(r3) # copy in last piece
done:
movl 4(ap),r0 # return s1
ret

89
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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strncmp.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/*
* Compare at most n characters of string
* s1 lexicographically to string s2.
* Return:
* 0 s1 == s2
* > 0 s1 > s2
* < 0 s2 < s2
*
* strncmp(s1, s2, n)
* char *s1, *s2;
* int n;
*/
#include "DEFS.h"
ENTRY(strncmp, 0)
movl 4(ap),r1 # r1 = s1
movq 8(ap),r3 # r3 = s2; r4 = n
1:
clrl r5 # calculate min bytes to next page boundry
subb3 r1,$255,r5 # r5 = (bytes - 1) to end of page for s1
subb3 r3,$255,r0 # r0 = (bytes - 1) to end of page for s2
cmpb r0,r5 # r5 = min(r0, r5);
bgtru 2f
movb r0,r5
2:
incl r5 # r5 = min bytes to next page boundry
cmpl r4,r5 # r5 = min(n, r5);
bgeq 3f
movl r4,r5
3:
cmpc3 r5,(r1),(r3) # compare strings
bneq 4f
subl2 r5,r4 # check for end of comparison
beql 5f
subl2 r5,r1 # check if found null yet
locc $0,r5,(r1)
beql 1b # not yet done, continue checking
subl2 r0,r3
mnegb (r3),r0 # r0 = '\0' - *s2
cvtbl r0,r0
ret
4:
subl2 r0,r5 # check for null in matching string
subl2 r5,r1
locc $0,r5,(r1)
bneq 5f
subb3 (r3),(r1),r0 # r0 = *s1 - *s2
cvtbl r0,r0
ret
5:
clrl r0 # both the same to null
ret

84
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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strncpy.s 5.6 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/*
* Copy string s2 over top of string s1.
* Truncate or null-pad to n bytes.
*
* char *
* strncpy(s1, s2, n)
* char *s1, *s2;
*/
#include "DEFS.h"
ENTRY(strncpy, R6)
movl 12(ap),r6 # r6 = n
bleq done # n <= 0
movl 4(ap),r3 # r3 = s1
movl 8(ap),r1 # r1 = s2
1:
movzwl $65535,r2 # r2 = bytes in first chunk
cmpl r6,r2 # r2 = min(bytes in chunk, n);
jgeq 2f
movl r6,r2
2:
subl2 r2,r6 # update n
locc $0,r2,(r1) # '\0' found?
jneq 3f
subl2 r2,r1 # back up pointer updated by locc
movc3 r2,(r1),(r3) # copy in next piece
tstl r6 # run out of space?
jneq 1b
jbr done
3: # copy up to '\0' logic
addl2 r0,r6 # r6 = number of null-pad bytes
subl2 r0,r2 # r2 = number of bytes to move
subl2 r2,r1 # back up pointer updated by locc
movc3 r2,(r1),(r3) # copy in last piece
4: # null-pad logic
movzwl $65535,r2 # r2 = bytes in first chunk
cmpl r6,r2 # r2 = min(bytes in chunk, n);
jgeq 5f
movl r6,r2
5:
subl2 r2,r6 # update n
movc5 $0,(r3),$0,r2,(r3)# pad with '\0's
tstl r6 # finished padding?
jneq 4b
done:
movl 4(ap),r0 # return s1
ret

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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strpbrk.s 5.1 (Berkeley) 5/15/90"
#endif /* LIBC_SCCS and not lint */
/*
* Find in s1 the first occurrence of any character from s2.
* If there are none, return NULL.
*
* char *
* strpbrk(s1, s2)
* const char *s1, *s2;
*/
#include "DEFS.h"
ENTRY(strpbrk, 0)
subl2 $32,sp /* make 256 bit table */
movc5 $0,(sp),$0,$32,(sp)
movq 4(ap),r0 /* r0 = s1, r1 = s2 */
/* turn on bit for each character in s2, including '\0' */
1:
movzbl (r1)+,r2
bbss r2,(sp),1b
bneq 1b
/* look for a character that is in s2 */
2:
movzbl (r0)+,r2 /* c = *s++ */
bbc r2,(sp),2b /* loop until c is in table */
beql 3f /* if c==0, go return NULL */
decl r0 /* s-- */
ret
3:
clrl r0
ret

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/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strrchr.s 5.4 (Berkeley) 6/1/90"
#endif /* LIBC_SCCS and not lint */
/*
* Find the last occurence of c in the string cp.
* Return pointer to match or null pointer.
*
* char *
* strrchr(cp, c)
* char *cp, c;
*/
#include "DEFS.h"
.lcomm tbl,256
ENTRY(strrchr, 0)
movzwl $65535,r4 /* handy 65535 */
movq 4(ap),r1 /* r1 = cp; r2 = c */
movzbl r2,r2
beql Lzero /* special case for c == '\0' */
clrl r5 /* r5 = pointer to last match */
/*
* Fancy scanc version. Alas, it is not reentrant.
*/
movab tbl,r3 /* r3 = address of table */
bbss $0,(r3),Lreent /* ensure not reentering */
movab (r3)[r2],r4
incb (r4) /* mark both '\0' and c */
0:
scanc $65535,(r1),(r3),$1 /* look for c or '\0' */
beql 0b /* keep looking */
tstb (r1)
beql 1f /* done if '\0' */
movab (r1)+,r5 /* save most recently found, and skip over it */
jbr 0b /* keep looking */
1:
movl r5,r0 /* return last found (if any) */
clrb (r4) /* clean up table */
clrb (r3)
ret
/*
* Special case for \0.
*/
Lzero:
locc $0,r4,(r1) /* just find end of string */
beql Lzero /* still looking */
movl r1,r0 /* found it */
ret
/*
* Slower reentrant version is two two-step searches. The first
* phase runs until we know where the string ends; it locates any
* occurrences of c within a 65535-byte block. Once we have found
* the end of the string, we find any further occurrences before
* that location.
*/
Lreent:
0: /* first phase */
movl r1,r3
locc $0,r4,(r3) /* look for '\0' */
bneq 1f
locc r2,r4,(r3) /* continue phase 1 search for c */
beql 0b
movab (r1)+,r5 /* found c: save and increment pointer */
brb 0b /* and continue */
1: /* second phase */
subl3 r3,r1,r0 /* length of short block */
movl r3,r1
2:
locc r2,r0,(r1) /* look for c */
beql 3f /* skip if not found */
movab (r1)+,r5 /* save pointer as before */
sobgtr r0,2b /* adjust count and loop */
3:
movl r5,r0 /* return stashed pointer */
ret

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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strsep.s 5.1 (Berkeley) 5/15/90"
#endif /* LIBC_SCCS and not lint */
/*
* Get next word from string *stringp, where words are
* strings separated by characters from delim.
*
* Writes NULs into the string at *stringp to end tokens.
* On return, *stringp points past the last NUL written (if there might
* be further tokens), or is NULL (if there are definitely no more tokens).
*
* If *stringp is NULL, strtoken returns NULL.
*
* char *
* strtoken(stringp, delim)
* register char **stringp;
* register char const *delim;
*/
#include "DEFS.h"
ENTRY(strsep, 0)
tstl *4(ap) /* if (*stringp == NULL) */
bneq 0f
clrl r0 # return (NULL);
ret
0:
subl2 $32,sp /* make room for 256 bit table */
movc5 $0,(sp),$0,$32,(sp)
movq 4(ap),r1 /* r1 = stringp, r2 = delim */
/* turn on bit for each character in s2, including '\0' */
1:
movzbl (r2)+,r0
bbss r0,(sp),1b
bneq 1b
movl (r1),r3 /* r3 = s = *stringp */
movl r3,r0 /* save return value */
/* scan for delimiters */
2:
movzbl (r3)+,r2 /* c = *s++ */
bbc r2,(sp),2b /* loop until c is in table */
beql 3f
clrb -1(r3) /* if c!='\0', s[-1] = 0 */
movl r3,(r1) /* and *stringp = s */
ret
3:
clrl (r1) /* else *stringp = NULL */
ret

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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strspn.s 5.1 (Berkeley) 5/15/90"
#endif /* LIBC_SCCS and not lint */
/*
* Span the string s2 (skip characters that are in s2).
* Return the number of characters in s1 that were skipped.
*
* size_t
* strspn(s1, s2)
* const char *s1, *s2;
*/
#include "DEFS.h"
ENTRY(strspn, 0)
subl2 $32,sp /* make 256 bit table */
movc5 $0,(sp),$0,$32,(sp)
movq 4(ap),r1 /* r1 = s1, r2 = s2 */
/* turn on bit for each character in s2, including '\0' */
1:
movzbl (r2)+,r0
bbss r0,(sp),1b
bneq 1b
/* now clear bit for '\0' */
/* (this is easier than avoiding setting it in the first place) */
bicb2 $1,(sp) /* stop at '\0' */
movl r1,r0 /* r0 = s (current pos in s1) */
/* look for a character that is not in s2 */
2:
movzbl (r0)+,r2 /* c = *s++ */
bbs r2,(sp),2b /* loop while c is in table */
decl r0 /* s-- */
subl2 r1,r0 /* r0 = s - s1 = count */
ret

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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)strstr.s 5.2 (Berkeley) 8/21/90"
#endif /* LIBC_SCCS and not lint */
/*
* Find the first occurrence of s2 as a substring in s1.
* If s2 is empty, return s1.
*
* char *strstr(s1, s2)
* const char *s1, *s2;
*/
#include "DEFS.h"
ENTRY(strstr, 0)
movq 4(ap),r3 /* r3 = s1, r4 = s2 */
movzwl $65535,r2 /* r2 = locc/matchc limit */
locc $0,r2,(r4) /* find '\0' in s2 */
beql 4f
subl3 r4,r1,r5 /* r5 = strlen(s2) */
beql 1f /* if r5 == 0, return s1 */
/*
* s2 is short enough to apply matchc.
* If s1 is long, we have to do it in stages.
*/
0: locc $0,r2,(r3) /* find '\0' in s1 */
beql 3f
/*
* Both strings are `short'; we can use matchc directly.
*/
subl3 r3,r1,r1 /* r1 = strlen(s1) */
matchc r5,(r4),r1,(r3) /* find substring */
bneq 2f
/*
* r3 points r5 bytes past match. Return the match.
*/
1: subl3 r5,r3,r0 /* return (byte_past_match - strlen(s2)) */
ret
/*
* There is no matching substring.
*/
2: clrl r0 /* return NULL */
ret
/*
* s1 is too long (> 65535 bytes) to apply matchc directly,
* but s2 is short enough. Apply s2 to s1, then (if not
* found yet) advancing s1 by (65536-strlen(s2)) bytes and
* loop.
*/
3: matchc r5,(r4),r2,(r3) /* search */
beql 1b /* if found, go return it */
decw r2 /* from 0 to 65535 */
incl r3 /* already advanced 65535, now 65536 */
subl2 r5,r3 /* ... minus strlen(s2) */
brb 0b
/*
* s2 is too long (> 65535 bytes) to bother with matchc.
*/
4: locc $0,r2,(r1) /* continue working on strlen(s2) */
beql 4b
subl3 r1,r4,r5 /* r5 = strlen(s2) */
movb (r4)+,r2 /* r2 = *s2++ */
decl r5 /* fix up length */
5: movb (r3)+,r0 /* r0 = *s1++ */
beql 2b /* if '\0', return NULL */
cmpb r0,r2
bneq 5b /* loop until first char found */
pushr R5|R4|R3|R2 /* save c, s1, s2, n */
pushr R5|R4|R3 /* strncmp(s1, s2, n) */
calls $3,_strncmp
popr R2|R3|R4|R5 /* restore */
tstl r0
bneq 5b /* loop until strncmp says rest same too */
subl3 $1,r3,r0 /* return previous s1 */
ret