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| author | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-01-15 07:46:34 +0100 |
|---|---|---|
| committer | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2020-01-15 07:46:34 +0100 |
| commit | 4393640af54ee3139e5c399e6fa1685faf483707 (patch) | |
| tree | 9282814d8437d0bc91458791c53d36cd2bc2c602 /aarch64/Asmgen.v | |
| parent | 9475c5637c5d650f43955abe8f995797893affe1 (diff) | |
| download | compcert-kvx-4393640af54ee3139e5c399e6fa1685faf483707.tar.gz compcert-kvx-4393640af54ee3139e5c399e6fa1685faf483707.zip | |
2-instruction signed division by two on Aarch64
Diffstat (limited to 'aarch64/Asmgen.v')
| -rw-r--r-- | aarch64/Asmgen.v | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/aarch64/Asmgen.v b/aarch64/Asmgen.v index 875f3fd1..daea7dd5 100644 --- a/aarch64/Asmgen.v +++ b/aarch64/Asmgen.v @@ -268,18 +268,24 @@ Definition arith_extended Definition shrx32 (rd r1: ireg) (n: int) (k: code) : code := if Int.eq n Int.zero then Pmov rd r1 :: k - else - Porr W X16 XZR r1 (SOasr (Int.repr 31)) :: - Padd W X16 r1 X16 (SOlsr (Int.sub Int.iwordsize n)) :: - Porr W rd XZR X16 (SOasr n) :: k. + else if Int.eq n Int.one then + Padd W X16 r1 r1 (SOlsr (Int.repr 31)) :: + Porr W rd XZR X16 (SOasr n) :: k + else + Porr W X16 XZR r1 (SOasr (Int.repr 31)) :: + Padd W X16 r1 X16 (SOlsr (Int.sub Int.iwordsize n)) :: + Porr W rd XZR X16 (SOasr n) :: k. Definition shrx64 (rd r1: ireg) (n: int) (k: code) : code := if Int.eq n Int.zero then Pmov rd r1 :: k - else - Porr X X16 XZR r1 (SOasr (Int.repr 63)) :: - Padd X X16 r1 X16 (SOlsr (Int.sub Int64.iwordsize' n)) :: - Porr X rd XZR X16 (SOasr n) :: k. + else if Int.eq n Int.one then + Padd X X16 r1 r1 (SOlsr (Int.repr 63)) :: + Porr X rd XZR X16 (SOasr n) :: k + else + Porr X X16 XZR r1 (SOasr (Int.repr 63)) :: + Padd X X16 r1 X16 (SOlsr (Int.sub Int64.iwordsize' n)) :: + Porr X rd XZR X16 (SOasr n) :: k. (** Load the address [id + ofs] in [rd] *) |