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Add mcr* and mr*c support to thumb targets

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123917 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bruno Cardoso Lopes 2011-01-20 16:35:57 +00:00
parent fafb8a1ba5
commit fa5bd27fbe
4 changed files with 81 additions and 2 deletions
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7
lib/Target/ARM/ARMInstrFormats.td
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@ -801,6 +801,13 @@ class TIx2<bits<5> opcod1, bits<2> opcod2, bit opcod3,
let Inst{12} = opcod3;
}
// Move to/from coprocessor instructions
class T1Cop<dag oops, dag iops, string asm, list<dag> pattern>
: ThumbI<oops, iops, AddrModeNone, Size4Bytes, NoItinerary, asm, "", pattern>,
Encoding, Requires<[IsThumb, HasV6]> {
let Inst{31-28} = 0b1110;
}
// BR_JT instructions
class TJTI<dag oops, dag iops, InstrItinClass itin, string asm,
list<dag> pattern>

55
lib/Target/ARM/ARMInstrThumb.td
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@ -1322,6 +1322,61 @@ def tLEApcrelJT : tPseudoInst<(outs tGPR:$Rd),
(ins i32imm:$label, nohash_imm:$id, pred:$p),
Size2Bytes, IIC_iALUi, []>;
//===----------------------------------------------------------------------===//
// Move between coprocessor and ARM core register -- for disassembly only
//
class tMovRCopro<string opc, bit direction>
: T1Cop<(outs), (ins p_imm:$cop, i32imm:$opc1,
GPR:$Rt, c_imm:$CRn, c_imm:$CRm, i32imm:$opc2),
!strconcat(opc, "\t$cop, $opc1, $Rt, $CRn, $CRm, $opc2"),
[/* For disassembly only; pattern left blank */]> {
let Inst{27-24} = 0b1110;
let Inst{20} = direction;
let Inst{4} = 1;
bits<4> Rt;
bits<4> cop;
bits<3> opc1;
bits<3> opc2;
bits<4> CRm;
bits<4> CRn;
let Inst{15-12} = Rt;
let Inst{11-8} = cop;
let Inst{23-21} = opc1;
let Inst{7-5} = opc2;
let Inst{3-0} = CRm;
let Inst{19-16} = CRn;
}
def tMCR : tMovRCopro<"mcr", 0 /* from ARM core register to coprocessor */>;
def tMRC : tMovRCopro<"mrc", 1 /* from coprocessor to ARM core register */>;
class tMovRRCopro<string opc, bit direction>
: T1Cop<(outs), (ins p_imm:$cop, i32imm:$opc1, GPR:$Rt, GPR:$Rt2, c_imm:$CRm),
!strconcat(opc, "\t$cop, $opc1, $Rt, $Rt2, $CRm"),
[/* For disassembly only; pattern left blank */]> {
let Inst{27-24} = 0b1100;
let Inst{23-21} = 0b010;
let Inst{20} = direction;
bits<4> Rt;
bits<4> Rt2;
bits<4> cop;
bits<4> opc1;
bits<4> CRm;
let Inst{15-12} = Rt;
let Inst{19-16} = Rt2;
let Inst{11-8} = cop;
let Inst{7-4} = opc1;
let Inst{3-0} = CRm;
}
def tMCRR : tMovRRCopro<"mcrr", 0 /* from ARM core register to coprocessor */>;
def tMRRC : tMovRRCopro<"mrrc", 1 /* from coprocessor to ARM core register */>;
//===----------------------------------------------------------------------===//
// TLS Instructions
//

8
lib/Target/ARM/AsmParser/ARMAsmParser.cpp
View File

@ -1193,12 +1193,16 @@ GetMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
Mnemonic == "dsb" || Mnemonic == "movs" || Mnemonic == "isb" ||
(isThumb && Mnemonic == "bkpt")) {
Mnemonic == "dsb" || Mnemonic == "movs" || Mnemonic == "isb") {
CanAcceptPredicationCode = false;
} else {
CanAcceptPredicationCode = true;
}
if (isThumb)
if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
Mnemonic == "mrc" || Mnemonic == "mrrc")
CanAcceptPredicationCode = false;
}
/// Parse an arm instruction mnemonic followed by its operands.

13
test/MC/ARM/thumb.s
View File

@ -38,3 +38,16 @@
@ CHECK: bkpt #2 @ encoding: [0x02,0xbe]
bkpt #2
@ CHECK: mcr p7, #1, r5, c1, c1, #4 @ encoding: [0x21,0xee,0x91,0x57]
mcr p7, #1, r5, c1, c1, #4
@ CHECK: mrc p14, #0, r1, c1, c2, #4 @ encoding: [0x11,0xee,0x92,0x1e]
mrc p14, #0, r1, c1, c2, #4
@ CHECK: mcrr p7, #1, r5, r4, c1 @ encoding: [0x44,0xec,0x11,0x57]
mcrr p7, #1, r5, r4, c1
@ CHECK: mrrc p7, #1, r5, r4, c1 @ encoding: [0x54,0xec,0x11,0x57]
mrrc p7, #1, r5, r4, c1