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[mips] Implement ehb, ssnop, and pause in assembler

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Summary: Add negative tests for pause

Reviewers: matheusalmeida

Reviewed By: matheusalmeida

Differential Revision: http://llvm-reviews.chandlerc.com/D3246

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205537 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Sanders
2014-04-03 13:21:51 +00:00
parent 3eb87654a5
commit 8750f9a291
22 changed files with 53 additions and 20 deletions
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11
lib/Target/Mips/MipsInstrFormats.td
View File

@@ -818,3 +818,14 @@ class CMov_F_F_FM<bits<5> fmt, bit tf> : StdArch {
let Inst{10-6} = fd;
let Inst{5-0} = 0x11;
}
class BARRIER_FM<bits<5> op> : StdArch {
bits<32> Inst;
let Inst{31-26} = 0; // SPECIAL
let Inst{25-21} = 0;
let Inst{20-16} = 0; // rt = 0
let Inst{15-11} = 0; // rd = 0
let Inst{10-6} = op; // Operation
let Inst{5-0} = 0; // SLL
}

6
lib/Target/Mips/MipsInstrInfo.td
View File

@@ -1161,6 +1161,12 @@ def MTC0 : MFC3OP<"mtc0", GPR32Opnd>, MFC3OP_FM<0x10, 4>;
def MFC2 : MFC3OP<"mfc2", GPR32Opnd>, MFC3OP_FM<0x12, 0>;
def MTC2 : MFC3OP<"mtc2", GPR32Opnd>, MFC3OP_FM<0x12, 4>;
class Barrier<string asmstr> : InstSE<(outs), (ins), asmstr, [], NoItinerary,
FrmOther>;
def SSNOP : Barrier<"ssnop">, BARRIER_FM<1>;
def EHB : Barrier<"ehb">, BARRIER_FM<3>;
def PAUSE : Barrier<"pause">, BARRIER_FM<5>, Requires<[HasMips32r2]>;
//===----------------------------------------------------------------------===//
// Instruction aliases
//===----------------------------------------------------------------------===//