On 10/21/10 22:11, Ian Lance Taylor wrote:
Paul Koningpaul_kon...@dell.com writes:
To take that example, on the pdp11 an SImode is two HImodes. Could
the RTL template in the MD file for, say, addsi3 split that into two
or three insns that operate on HImode values and describe the actual
Frédéric RISS frederic.r...@gmail.com writes:
The lower subreg pass will do that for you if you have the right set of
insns.
Could you expand a bit on what the 'right set of instructions' is or
even better give an example of an md file where we could find an
example?
E.g., on a 32-bit
Hi,
Is it possible to describe multi-register values in RTL when the
subparts of the value aren't stored in consecutive registers? For
example having a DI value constructed from 2 unrelated SI registers
(without losing the semantic of the original DI value) ?
Thanks a lot,
Fred
Frederic Riss frederic.r...@gmail.com writes:
Is it possible to describe multi-register values in RTL when the
subparts of the value aren't stored in consecutive registers? For
example having a DI value constructed from 2 unrelated SI registers
(without losing the semantic of the original DI
On Oct 21, 2010, at 8:15 PM, Ian Lance Taylor wrote:
Frederic Riss frederic.r...@gmail.com writes:
Is it possible to describe multi-register values in RTL when the
subparts of the value aren't stored in consecutive registers? For
example having a DI value constructed from 2 unrelated SI
Paul Koning paul_kon...@dell.com writes:
To take that example, on the pdp11 an SImode is two HImodes. Could
the RTL template in the MD file for, say, addsi3 split that into two
or three insns that operate on HImode values and describe the actual
instructions? In this case: add high parts,
Le jeudi 21 octobre 2010 à 21:11 -0700, Ian Lance Taylor a écrit :
Paul Koning paul_kon...@dell.com writes:
To take that example, on the pdp11 an SImode is two HImodes. Could
the RTL template in the MD file for, say, addsi3 split that into two
or three insns that operate on HImode values
