diff options
| author | merry <git@mary.rs> | 2022-02-17 22:39:45 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-02-17 19:39:45 -0300 |
| commit | 98e05ee4b7aa8a08088b1f0cd6c581bb50f11395 (patch) | |
| tree | af9cf98afb6c44161fadd87bfe7946c7a4250e47 /ARMeilleure/Decoders/OpCodeT16IfThen.cs | |
| parent | 868919e101ba5d5ad1cfccb5017b294fec11c6e3 (diff) | |
ARMeilleure: Thumb support (All T16 instructions) (#3105)1.1.36
* Decoders: Add InITBlock argument
* OpCodeTable: Minor cleanup
* OpCodeTable: Remove existing thumb instruction implementations
* OpCodeTable: Prepare for thumb instructions
* OpCodeTables: Improve thumb fast lookup
* Tests: Prepare for thumb tests
* T16: Implement BX
* T16: Implement LSL/LSR/ASR (imm)
* T16: Implement ADDS, SUBS (reg)
* T16: Implement ADDS, SUBS (3-bit immediate)
* T16: Implement MOVS, CMP, ADDS, SUBS (8-bit immediate)
* T16: Implement ANDS, EORS, LSLS, LSRS, ASRS, ADCS, SBCS, RORS, TST, NEGS, CMP, CMN, ORRS, MULS, BICS, MVNS (low registers)
* T16: Implement ADD, CMP, MOV (high reg)
* T16: Implement BLX (reg)
* T16: Implement LDR (literal)
* T16: Implement {LDR,STR}{,H,B,SB,SH} (register)
* T16: Implement {LDR,STR}{,B,H} (immediate)
* T16: Implement LDR/STR (SP)
* T16: Implement ADR
* T16: Implement Add to SP (immediate)
* T16: Implement ADD/SUB (SP)
* T16: Implement SXTH, SXTB, UXTH, UTXB
* T16: Implement CBZ, CBNZ
* T16: Implement PUSH, POP
* T16: Implement REV, REV16, REVSH
* T16: Implement NOP
* T16: Implement LDM, STM
* T16: Implement SVC
* T16: Implement B (conditional)
* T16: Implement B (unconditional)
* T16: Implement IT
* fixup! T16: Implement ADD/SUB (SP)
* fixup! T16: Implement Add to SP (immediate)
* fixup! T16: Implement IT
* CpuTestThumb: Add randomized tests
* Remove inITBlock argument
* Address nits
* Use index to handle IfThenBlockState
* Reduce line noise
* fixup
* nit
Diffstat (limited to 'ARMeilleure/Decoders/OpCodeT16IfThen.cs')
| -rw-r--r-- | ARMeilleure/Decoders/OpCodeT16IfThen.cs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/ARMeilleure/Decoders/OpCodeT16IfThen.cs b/ARMeilleure/Decoders/OpCodeT16IfThen.cs new file mode 100644 index 00000000..bf84d1d3 --- /dev/null +++ b/ARMeilleure/Decoders/OpCodeT16IfThen.cs @@ -0,0 +1,34 @@ +using System.Collections.Generic; +using System.Reflection.Emit; + +namespace ARMeilleure.Decoders +{ + class OpCodeT16IfThen : OpCodeT16 + { + public Condition[] IfThenBlockConds { get; } + + public int IfThenBlockSize { get { return IfThenBlockConds.Length; } } + + public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT16IfThen(inst, address, opCode); + + public OpCodeT16IfThen(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode) + { + List<Condition> conds = new(); + + int cond = (opCode >> 4) & 0xf; + int mask = opCode & 0xf; + + conds.Add((Condition)cond); + + while ((mask & 7) != 0) + { + int newLsb = (mask >> 3) & 1; + cond = (cond & 0xe) | newLsb; + mask <<= 1; + conds.Add((Condition)cond); + } + + IfThenBlockConds = conds.ToArray(); + } + } +} |