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* underflow detection
@ 2001-03-06 14:59 Ben Elliston
  2001-03-06 15:10 ` Frank Ch. Eigler
  0 siblings, 1 reply; 2+ messages in thread
From: Ben Elliston @ 2001-03-06 14:59 UTC (permalink / raw)
  To: cgen

It looks like the `add-oflag' rtx detects the basic overflow
condition.  In this example:

	    (add-oflag x y z)

Is it sufficient to test if `x' (or `y') is negative to detect
underflow?

Ben

^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: underflow detection
  2001-03-06 14:59 underflow detection Ben Elliston
@ 2001-03-06 15:10 ` Frank Ch. Eigler
  0 siblings, 0 replies; 2+ messages in thread
From: Frank Ch. Eigler @ 2001-03-06 15:10 UTC (permalink / raw)
  To: Ben Elliston; +Cc: cgen

Hi -

On Wed, Mar 07, 2001 at 09:58:28AM +1100, Ben Elliston wrote:
: [...]
: Is it sufficient to test if `x' (or `y') is negative to detect
: underflow?

No -- if x=1 and y=-1, there is no underflow.
But perhaps this is not what you mean.

- FChE
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2001-03-06 14:59 underflow detection Ben Elliston
2001-03-06 15:10 ` Frank Ch. Eigler

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