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Memset cleanup

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This commit is contained in:
Bruce Momjian 1998-02-11 21:45:40 +00:00
parent e166409033
commit 1e3c5b0ab5
1 changed files with 9 additions and 11 deletions
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20
src/include/c.h
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@ -7,7 +7,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: c.h,v 1.32 1998/02/11 21:38:08 momjian Exp $
* $Id: c.h,v 1.33 1998/02/11 21:45:40 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -708,20 +708,18 @@ typedef struct Exception
/* Get a bit mask of the bits set in non-int32 aligned addresses */
#define INT_ALIGN_MASK (sizeof(int32) - 1)
/* This function gets call too often, so we inline it if we can */
/*
* This function gets call too often, so we inline it if we can.
* Are we aligned for int32?
* We have to cast the pointer to int so we can do the AND
* We got the 64 number by testing this against the stock memset() on
* BSD/OS 3.0. Larger values were slower.
*/
#define MemSet(start, val, len) do \
{ /* are we aligned for int32? */ \
/* We have to cast the pointer to int \
so we can do the AND */ \
{
if (((long)(start) & INT_ALIGN_MASK) == 0 && \
((len) & INT_ALIGN_MASK) == 0 && \
(val) == 0 && \
/* \
* We got this number by testing this \
* against the stock memset() on \
* bsd/os 3.0. Larger values were \
* slower. \
*/ \
(len) <= 64) \
{ \
int32 *_i = (int32 *)(start); \