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- head 1.9;
- branch ;
- access ;
- symbols sprited:1.7.1;
- locks ; strict;
- comment @ * @;
-
-
- 1.9
- date 92.05.14.18.57.09; author kupfer; state Exp;
- branches ;
- next 1.8;
-
- 1.8
- date 92.03.27.13.32.23; author rab; state Exp;
- branches ;
- next 1.7;
-
- 1.7
- date 91.03.24.19.03.11; author kupfer; state Exp;
- branches 1.7.1.1;
- next 1.6;
-
- 1.6
- date 90.09.11.14.13.21; author kupfer; state Exp;
- branches ;
- next 1.5;
-
- 1.5
- date 90.09.07.14.20.30; author jhh; state Exp;
- branches ;
- next 1.4;
-
- 1.4
- date 88.07.25.13.16.02; author ouster; state Exp;
- branches ;
- next 1.3;
-
- 1.3
- date 88.07.19.13.26.46; author mendel; state Exp;
- branches ;
- next 1.2;
-
- 1.2
- date 88.04.25.21.32.57; author ouster; state Exp;
- branches ;
- next 1.1;
-
- 1.1
- date 88.04.25.17.21.58; author ouster; state Exp;
- branches ;
- next ;
-
- 1.7.1.1
- date 91.12.02.21.28.12; author kupfer; state Exp;
- branches ;
- next ;
-
-
- desc
- @@
-
-
- 1.9
- log
- @Remove the debug check for bogus accesses to user addresses. Use the
- ANSI signature (void pointers, etc).
- @
- text
- @/*
- * bcopy.c --
- *
- * Source code for the "bcopy" library routine.
- *
- * Copyright 1988 Regents of the University of California
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: /sprite/src/lib/c/bstring/RCS/bcopy.c,v 1.8 92/03/27 13:32:23 rab Exp Locker: kupfer $ SPRITE (Berkeley)";
- #endif not lint
-
- #include <bstring.h>
- #include <machparam.h>
-
- /*
- * The following mask is used to detect proper alignment of addresses
- * for doing word operations instead of byte operations. It is
- * machine-dependent. If none of the following bits are set in an
- * address, then word-based operations may be used. This value is imported
- * from machparam.h
- */
-
- /*
- * Just because we can do loads from half-word addresses on a sun3 doesn't
- * mean we want to. Make sure the load address is word-aligned and you'll
- * bcopy twice as fast when the dest is greater than the source.
- */
- #ifdef sun3
- #define WORDMASK 0x3
- #else
- #define WORDMASK WORD_ALIGN_MASK
- #endif
-
- /*
- *----------------------------------------------------------------------
- *
- * bcopy --
- *
- * Copy numBytes from *sourcePtr to *destPtr. This routine is
- * optimized to do transfers when sourcePtr and destPtr are both
- * integer-aligned and point to large areas.
- *
- * Results:
- * There is no return value. The memory at *destPtr is modified.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- void
- bcopy(sourceVoidPtr, destVoidPtr, numBytes)
- _CONST _VoidPtr sourceVoidPtr; /* Where to copy from */
- _VoidPtr destVoidPtr; /* Where to copy to */
- register int numBytes; /* The number of bytes to copy */
- {
- register _CONST int *sPtr = (int *) sourceVoidPtr;
- register int *dPtr = (int *) destVoidPtr;
- _CONST char *sourcePtr = sourceVoidPtr;
- char *destPtr = destVoidPtr;
-
- /*
- * If the destination is below the source then it is safe to copy
- * in the forward direction. Otherwise, we must start at the top
- * and work down, again optimizing for large transfers.
- */
-
- if (dPtr < sPtr) {
- /*
- * If both the source and the destination point to aligned
- * addresses then copy as much as we can in large transfers. Once
- * we have less than a whole int to copy then it must be done by
- * byte transfers. Furthermore, use an expanded loop to avoid
- * the overhead of continually testing loop variables.
- */
-
- if (!((((int) sPtr) | (int) dPtr) & WORDMASK)) {
- while (numBytes >= 16*sizeof(int)) {
- dPtr[0] = sPtr[0];
- dPtr[1] = sPtr[1];
- dPtr[2] = sPtr[2];
- dPtr[3] = sPtr[3];
- dPtr[4] = sPtr[4];
- dPtr[5] = sPtr[5];
- dPtr[6] = sPtr[6];
- dPtr[7] = sPtr[7];
- dPtr[8] = sPtr[8];
- dPtr[9] = sPtr[9];
- dPtr[10] = sPtr[10];
- dPtr[11] = sPtr[11];
- dPtr[12] = sPtr[12];
- dPtr[13] = sPtr[13];
- dPtr[14] = sPtr[14];
- dPtr[15] = sPtr[15];
- sPtr += 16;
- dPtr += 16;
- numBytes -= 16*sizeof(int);
- }
- while (numBytes >= sizeof(int)) {
- *dPtr++ = *sPtr++;
- numBytes -= sizeof(int);
- }
- if (numBytes == 0) {
- return;
- }
- }
-
- /*
- * Copy the remaining bytes.
- */
-
- sourcePtr = (char *) sPtr;
- destPtr = (char *) dPtr;
- while (numBytes > 0) {
- *destPtr++ = *sourcePtr++;
- numBytes--;
- }
- } else {
- /*
- * Handle extra bytes at the top that are due to the transfer
- * length rather than pointer misalignment.
- */
- while (numBytes & WORDMASK) {
- numBytes --;
- destPtr[numBytes] = sourcePtr[numBytes];
- }
- sPtr = (int *) (sourcePtr + numBytes);
- dPtr = (int *) (destPtr + numBytes);
-
- if (!((((int) sPtr) | (int) dPtr) & WORDMASK)) {
- while (numBytes >= 16*sizeof(int)) {
- sPtr -= 16;
- dPtr -= 16;
- dPtr[15] = sPtr[15];
- dPtr[14] = sPtr[14];
- dPtr[13] = sPtr[13];
- dPtr[12] = sPtr[12];
- dPtr[11] = sPtr[11];
- dPtr[10] = sPtr[10];
- dPtr[9] = sPtr[9];
- dPtr[8] = sPtr[8];
- dPtr[7] = sPtr[7];
- dPtr[6] = sPtr[6];
- dPtr[5] = sPtr[5];
- dPtr[4] = sPtr[4];
- dPtr[3] = sPtr[3];
- dPtr[2] = sPtr[2];
- dPtr[1] = sPtr[1];
- dPtr[0] = sPtr[0];
- numBytes -= 16*sizeof(int);
- }
- while (numBytes >= sizeof(int)) {
- *--dPtr = *--sPtr;
- numBytes -= sizeof(int);
- }
- if (numBytes == 0) {
- return;
- }
- }
-
- /*
- * Copy the remaining bytes.
- */
-
- destPtr = (char *) dPtr;
- sourcePtr = (char *) sPtr;
- while (numBytes > 0) {
- *--destPtr = *--sourcePtr;
- numBytes--;
- }
- }
- }
- @
-
-
- 1.8
- log
- @Fixed a couple lint errors.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: /sprite/src/lib/c/bstring/RCS/bcopy.c,v 1.7 91/03/24 19:03:11 kupfer Exp Locker: rab $ SPRITE (Berkeley)";
- d20 3
- a30 3
- #include "machparam.h"
- #include <bstring.h>
-
- a41 4
- #ifdef KERNEL
- #include <vmHack.h>
- #endif
-
- d61 3
- a63 3
- bcopy(sourcePtr, destPtr, numBytes)
- char *sourcePtr; /* Where to copy from */
- char *destPtr; /* Where to copy to */
- d66 4
- a69 2
- register int *sPtr = (int *) sourcePtr;
- register int *dPtr = (int *) destPtr;
- @
-
-
- 1.7
- log
- @Small hack so that the kernel can check for incorrect references to
- user addresses.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: /sprite/src/lib/c/bstring/RCS/bcopy.c,v 1.6 90/09/11 14:13:21 kupfer Exp Locker: kupfer $ SPRITE (Berkeley)";
- a72 4
- #ifdef VM_CHECK_BSTRING_ACCESS
- Vm_CheckAccessible(sourcePtr, numBytes);
- Vm_CheckAccessible(destPtr, numBytes);
- #endif
- d87 1
- a87 1
-
- d118 1
- a118 1
-
- d122 1
- a122 1
-
- d171 1
- a171 1
-
- d175 1
- a175 1
-
- @
-
-
- 1.7.1.1
- log
- @Initial branch for Sprite server.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: /sprite/src/lib/c/bstring/RCS/bcopy.c,v 1.7 91/03/24 19:03:11 kupfer Exp Locker: rab $ SPRITE (Berkeley)";
- @
-
-
- 1.6
- log
- @Lint.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: /sprite/src/lib/c/bstring/RCS/bcopy.c,v 1.5 90/09/07 14:20:30 jhh Exp Locker: kupfer $ SPRITE (Berkeley)";
- d42 4
- d73 4
- @
-
-
- 1.5
- log
- @fixed mis-aligned bcopy on a sun3
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: /sprite/src/lib/c/bstring/RCS/bcopy.c,v 1.4 88/07/25 13:16:02 ouster Exp Locker: jhh $ SPRITE (Berkeley)";
- d60 1
- @
-
-
- 1.4
- log
- @Lint.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: bcopy.c,v 1.3 88/07/19 13:26:46 mendel Exp $ SPRITE (Berkeley)";
- d29 1
- d31 8
- d40 1
- @
-
-
- 1.3
- log
- @Import WORD_ALIGN_MASK from machparam.h.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: bcopy.c,v 1.2 88/04/25 21:32:57 ouster Exp $ SPRITE (Berkeley)";
- a56 1
- int tmp;
- @
-
-
- 1.2
- log
- @Bug fixes.
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: bcopy.c,v 1.1 88/04/25 17:21:58 ouster Exp $ SPRITE (Berkeley)";
- d24 2
- a25 2
- * address, then word-based transfers may be used. Eventually this
- * mask needs to be handled in a more machine-independent fashion.
- d28 4
- a31 1
- #define WORDMASK 0x1
- @
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @d17 1
- a17 1
- static char rcsid[] = "$Header: bcopy.c,v 1.1 88/04/25 13:25:41 ouster Exp $ SPRITE (Berkeley)";
- d52 2
- a53 2
- register int *sPtr;
- register int *dPtr;
- d62 1
- a62 1
- if (destPtr < sourcePtr) {
- d64 1
- a64 1
- * If both the sourcePtr and the destPtr point to aligned
- a70 3
- sPtr = (int *)sourcePtr;
- dPtr = (int *)destPtr;
-
- a99 2
- sourcePtr = (char *) sPtr;
- destPtr = (char *) dPtr;
- d106 2
- d113 10
- a122 2
- destPtr += numBytes;
- sourcePtr += numBytes;
- d124 1
- a124 3
- if (!((int) sPtr & WORDMASK) && !((int) dPtr & WORDMASK)) {
- sPtr = (int *) sourcePtr;
- dPtr = (int *) destPtr;
- a152 2
- sourcePtr = (char *) sPtr;
- destPtr = (char *) dPtr;
- d159 2
- @
-