From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joel Soete <soete.joel@tiscali.be>
Subject: [parisc-linux] pa_memcpy: 2 small question
Date: Sun, 09 Jan 2005 19:07:27 +0000
Message-ID: <41E180EF.8040808@tiscali.be>
References: <20050105055412.68E06495698@palinux.hppa>
	<20050107095143.GN18497@tausq.org>
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To: Randolph Chung <randolph@tausq.org>
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Hello Randolph,

I just studying your pa_memcpy code (always to see if I can use it to improve stuff that you suggested me: l*).
And I wonder understand some values in copy_dstalign():
[...]
in the shift computing:
         /* Calculate how to shift a word read at the memory operation
            aligned srcp to make it aligned for copy.  */
         sh_1 = 8 * (src % sizeof(unsigned int));
         sh_2 = 8 * sizeof(unsigned int) - sh_1;

what means '8' (== 2 * word size; i.e. 2 * 32 bit because MERGE use shrpw and so 2 (a pair of word)? )

next in
          switch (len % 4)
         {

is '4' because as mentioned in copy_dstalign() description this 'Handles _4_ words per loop'

Thanks in advance,
	Joel
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