Martin Povišer
038a5e1ed4
peepopt: Support shift amounts zero-padded from below
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The `opt_expr` pass running before `peepopt` can interfere with the
detection of a shiftmul pattern due to some of the bottom bits of the
shift amount being replaced with constant zero. Extend the detection to
cover those situations as well.
2023-10-16 13:52:06 +02:00
Martin Povišer
dd1a8ae49a
peepopt: Try to use original wires
2023-10-16 13:52:06 +02:00
Martin Povišer
bd8a81a907
peepopt: Clean up 'shiftmul' a bit
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No functional change intended.
2023-10-16 13:52:06 +02:00
Marcelina Kościelnicka
c1ed1c28be
peeopt.shiftmul: Add a signedness check.
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Fixes #2332 .
2020-08-05 21:01:20 +02:00
Clifford Wolf
eb80d3d43f
Change pmgen default rule to reject, switch peepopt behavior to accept
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Signed-off-by: Clifford Wolf <clifford@clifford.at>
2019-08-15 22:47:59 +02:00
Clifford Wolf
73bf453929
Improvements in pmgen for recursive patterns
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Signed-off-by: Clifford Wolf <clifford@clifford.at>
2019-08-15 18:35:56 +02:00
Clifford Wolf
cb285e4b87
Do not use shiftmul peepopt pattern when mul result is truncated, fixes #1047
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Signed-off-by: Clifford Wolf <clifford@clifford.at>
2019-05-28 17:17:56 +02:00
Clifford Wolf
b37c31e2cb
Bugfix in peepopt_shiftmul.pmg
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Signed-off-by: Clifford Wolf <clifford@clifford.at>
2019-05-06 15:34:19 +02:00
Clifford Wolf
4306bebe58
pmgen progress
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Signed-off-by: Clifford Wolf <clifford@clifford.at>
2019-04-30 10:51:51 +02:00
Clifford Wolf
bb4f3642de
Some pmgen reorg, rename peepopt.pmg to peepopt_shiftmul.pmg
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Signed-off-by: Clifford Wolf <clifford@clifford.at>
2019-04-30 08:04:22 +02:00
