diff options
| author | Alex Barney <thealexbarney@gmail.com> | 2018-10-30 19:43:02 -0600 |
|---|---|---|
| committer | gdkchan <gab.dark.100@gmail.com> | 2018-10-30 22:43:02 -0300 |
| commit | 9cb57fb4bb3bbae0ae052a5af4a96a49fc5d864d (patch) | |
| tree | 0c97425aeb311c142bc92a6fcc503cb2c07d4376 /ChocolArm64/Decoders/OpCodeMemImm64.cs | |
| parent | 5a87e58183578f5b84ca8d01cbb76aed11820f78 (diff) | |
Adjust naming conventions for Ryujinx and ChocolArm64 projects (#484)
* Change naming convention for Ryujinx project
* Change naming convention for ChocolArm64 project
* Fix NaN
* Remove unneeded this. from Ryujinx project
* Adjust naming from new PRs
* Name changes based on feedback
* How did this get removed?
* Rebasing fix
* Change FP enum case
* Remove prefix from ChocolArm64 classes - Part 1
* Remove prefix from ChocolArm64 classes - Part 2
* Fix alignment from last commit's renaming
* Rename namespaces
* Rename stragglers
* Fix alignment
* Rename OpCode class
* Missed a few
* Adjust alignment
Diffstat (limited to 'ChocolArm64/Decoders/OpCodeMemImm64.cs')
| -rw-r--r-- | ChocolArm64/Decoders/OpCodeMemImm64.cs | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/ChocolArm64/Decoders/OpCodeMemImm64.cs b/ChocolArm64/Decoders/OpCodeMemImm64.cs new file mode 100644 index 00000000..edaa4970 --- /dev/null +++ b/ChocolArm64/Decoders/OpCodeMemImm64.cs @@ -0,0 +1,53 @@ +using ChocolArm64.Instructions; + +namespace ChocolArm64.Decoders +{ + class OpCodeMemImm64 : OpCodeMem64 + { + public long Imm { get; protected set; } + public bool WBack { get; protected set; } + public bool PostIdx { get; protected set; } + protected bool Unscaled { get; private set; } + + private enum MemOp + { + Unscaled = 0, + PostIndexed = 1, + Unprivileged = 2, + PreIndexed = 3, + Unsigned + } + + public OpCodeMemImm64(Inst inst, long position, int opCode) : base(inst, position, opCode) + { + Extend64 = ((opCode >> 22) & 3) == 2; + WBack = ((opCode >> 24) & 1) == 0; + + //The type is not valid for the Unsigned Immediate 12-bits encoding, + //because the bits 11:10 are used for the larger Immediate offset. + MemOp type = WBack ? (MemOp)((opCode >> 10) & 3) : MemOp.Unsigned; + + PostIdx = type == MemOp.PostIndexed; + Unscaled = type == MemOp.Unscaled || + type == MemOp.Unprivileged; + + //Unscaled and Unprivileged doesn't write back, + //but they do use the 9-bits Signed Immediate. + if (Unscaled) + { + WBack = false; + } + + if (WBack || Unscaled) + { + //9-bits Signed Immediate. + Imm = (opCode << 43) >> 55; + } + else + { + //12-bits Unsigned Immediate. + Imm = ((opCode >> 10) & 0xfff) << Size; + } + } + } +}
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