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Thumb2 assembly parsing and encoding for LDR(register).

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139264 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2011-09-07 23:10:15 +00:00
parent 3e328ecbd8
commit ab899c1bcc
3 changed files with 43 additions and 1 deletions
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8
lib/Target/ARM/ARMInstrThumb2.td
View File

@ -167,11 +167,13 @@ def t2am_imm8s4_offset : Operand<i32> {
}
// t2addrmode_so_reg := reg + (reg << imm2)
def t2addrmode_so_reg_asmoperand : AsmOperandClass {let Name="T2MemRegOffset";}
def t2addrmode_so_reg : Operand<i32>,
ComplexPattern<i32, 3, "SelectT2AddrModeSoReg", []> {
let PrintMethod = "printT2AddrModeSoRegOperand";
let EncoderMethod = "getT2AddrModeSORegOpValue";
let DecoderMethod = "DecodeT2AddrModeSOReg";
let ParserMatchClass = t2addrmode_so_reg_asmoperand;
let MIOperandInfo = (ops GPR:$base, rGPR:$offsreg, i32imm:$offsimm);
}
@ -3709,3 +3711,9 @@ def : t2InstAlias<"ldrb${p} $Rt, $addr",
(t2LDRBi12 rGPR:$Rt, t2addrmode_imm12:$addr, pred:$p)>;
def : t2InstAlias<"ldrh${p} $Rt, $addr",
(t2LDRHi12 rGPR:$Rt, t2addrmode_imm12:$addr, pred:$p)>;
def : t2InstAlias<"ldr${p} $Rt, $addr",
(t2LDRs GPR:$Rt, t2addrmode_so_reg:$addr, pred:$p)>;
def : t2InstAlias<"ldrb${p} $Rt, $addr",
(t2LDRBs rGPR:$Rt, t2addrmode_so_reg:$addr, pred:$p)>;
def : t2InstAlias<"ldrh${p} $Rt, $addr",
(t2LDRHs rGPR:$Rt, t2addrmode_so_reg:$addr, pred:$p)>;

18
lib/Target/ARM/AsmParser/ARMAsmParser.cpp
View File

@ -680,6 +680,16 @@ public:
return false;
return true;
}
bool isT2MemRegOffset() const {
if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative)
return false;
// Only lsl #{0, 1, 2, 3} allowed.
if (Mem.ShiftType == ARM_AM::no_shift)
return true;
if (Mem.ShiftType != ARM_AM::lsl || Mem.ShiftImm > 3)
return false;
return true;
}
bool isMemThumbRR() const {
// Thumb reg+reg addressing is simple. Just two registers, a base and
// an offset. No shifts, negations or any other complicating factors.
@ -844,7 +854,6 @@ public:
ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
}
void addShifterImmOperands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
@ -1145,6 +1154,13 @@ public:
Inst.addOperand(MCOperand::CreateImm(Val));
}
void addT2MemRegOffsetOperands(MCInst &Inst, unsigned N) const {
assert(N == 3 && "Invalid number of operands!");
Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
Inst.addOperand(MCOperand::CreateImm(Mem.ShiftImm));
}
void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
assert(N == 2 && "Invalid number of operands!");
Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));

18
test/MC/ARM/basic-thumb2-instructions.s
View File

@ -539,6 +539,24 @@ _func:
@ fixup A - offset: 0, value: _foo, kind: fixup_t2_ldst_pcrel_12
@------------------------------------------------------------------------------
@ LDR(register)
@------------------------------------------------------------------------------
ldr r1, [r8, r1]
ldr.w r4, [r5, r2]
ldr r6, [r0, r2, lsl #3]
ldr r8, [r8, r2, lsl #2]
ldr r7, [sp, r2, lsl #1]
ldr r7, [sp, r2, lsl #0]
@ CHECK: ldr.w r1, [r8, r1] @ encoding: [0x58,0xf8,0x01,0x10]
@ CHECK: ldr.w r4, [r5, r2] @ encoding: [0x55,0xf8,0x02,0x40]
@ CHECK: ldr.w r6, [r0, r2, lsl #3] @ encoding: [0x50,0xf8,0x32,0x60]
@ CHECK: ldr.w r8, [r8, r2, lsl #2] @ encoding: [0x58,0xf8,0x22,0x80]
@ CHECK: ldr.w r7, [sp, r2, lsl #1] @ encoding: [0x5d,0xf8,0x12,0x70]
@ CHECK: ldr.w r7, [sp, r2] @ encoding: [0x5d,0xf8,0x02,0x70]
@------------------------------------------------------------------------------
@ LDRB(immediate)
@------------------------------------------------------------------------------