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| author | Xavier Leroy <xavier.leroy@inria.fr> | 2016-10-02 16:17:51 +0200 |
|---|---|---|
| committer | Xavier Leroy <xavier.leroy@inria.fr> | 2016-10-02 16:17:51 +0200 |
| commit | f21a6b181dded86ef0e5c7ab94f74e5b960fd510 (patch) | |
| tree | 01bb7b59e438c60d12d87d869b6c890095a977f4 /ia32/ValueAOp.v | |
| parent | a14b9578ee5297d954103e05d7b2d322816ddd8f (diff) | |
| download | compcert-f21a6b181dded86ef0e5c7ab94f74e5b960fd510.tar.gz compcert-f21a6b181dded86ef0e5c7ab94f74e5b960fd510.zip | |
Improve code generation for 64-bit signed integer division
Implement the 'shift right extended' trick, both in the generic implementation (backend/SplitLong) and in the IA32 port.
Note that now SelectDiv depends on SelectLong, and that some work was moved from SelectLong to SelectDiv.
Diffstat (limited to 'ia32/ValueAOp.v')
| -rw-r--r-- | ia32/ValueAOp.v | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/ia32/ValueAOp.v b/ia32/ValueAOp.v index ce33341e..c8b3278e 100644 --- a/ia32/ValueAOp.v +++ b/ia32/ValueAOp.v @@ -132,6 +132,7 @@ Definition eval_static_operation (op: operation) (vl: list aval): aval := | Oshllimm n, v1::nil => shll v1 (I n) | Oshrl, v1::v2::nil => shrl v1 v2 | Oshrlimm n, v1::nil => shrl v1 (I n) + | Oshrxlimm n, v1::nil => shrxl v1 (I n) | Oshrlu, v1::v2::nil => shrlu v1 v2 | Oshrluimm n, v1::nil => shrlu v1 (I n) | Ororlimm n, v1::nil => rorl v1 (I n) |