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Diffstat (limited to 'sysdeps/vax/memmove.s')
| -rw-r--r-- | sysdeps/vax/memmove.s | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/sysdeps/vax/memmove.s b/sysdeps/vax/memmove.s deleted file mode 100644 index 738544142f..0000000000 --- a/sysdeps/vax/memmove.s +++ /dev/null @@ -1,89 +0,0 @@ -/*- - * 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. - * 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 |