Re: __divdi3 unresolved + X pointer blocks

Geert Uytterhoeven [off-list ref] writes:

On Wed, 4 Jul 2001, David Edelsohn wrote:

quoted

	You do not seem to have understood my reply.  I will repeat the
important sentence:

	SHIFT IS NOT THE SAME AS DIVIDE FOR SIGNED INTEGERS.

Indeed. That's why you have `logical shift right' and
`arithmetic shift right'.
The former inserts zeroes, the latter inserts a copy of the MSB.

Don't know from memory whether PPC has them...

Yes, PowerPC has both; but some forms don't have their own opcodes, as they
are emulated with bitfield instructions.

And: 'arithmetic shift right' is _not_ the same as signed divide, because the
rounding of negative operands or results may differ.

  Holger


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