[mips][microMIPS] Implement BREAK, EHB and EI instructions

http://reviews.llvm.org/D10090

llvm-svn: 240531

llvm/lib/Target/Mips/MicroMips32r6InstrFormats.td

@@ -240,3 +240,35 @@ class ERETNC_FM_MMR6<string instr_asm> : MMR6Arch<instr_asm> {
   let Inst{15-6}  = 0x3cd;
   let Inst{5-0}   = 0x3c;
 }
+
+class BREAK_MMR6_ENC<string instr_asm> : MMR6Arch<instr_asm> {
+  bits<10> code_1;
+  bits<10> code_2;
+  bits<32> Inst;
+  let Inst{31-26} = 0x0;
+  let Inst{25-16} = code_1;
+  let Inst{15-6}  = code_2;
+  let Inst{5-0}   = 0x07;
+}
+
+class BARRIER_MMR6_ENC<string instr_asm, bits<5> op> : MMR6Arch<instr_asm> {
+  bits<32> Inst;
+
+  let Inst{31-26} = 0x0;
+  let Inst{25-21} = 0x0;
+  let Inst{20-16} = 0x0;
+  let Inst{15-11} = op;
+  let Inst{10-6}  = 0x0;
+  let Inst{5-0}   = 0x0;
+}
+
+class EIDI_MMR6_ENC<string instr_asm, bits<10> funct> : MMR6Arch<instr_asm> {
+  bits<32> Inst;
+  bits<5> rt; // Actually rs but we're sharing code with the standard encodings which call it rt
+
+  let Inst{31-26} = 0x00;
+  let Inst{25-21} = 0x00;
+  let Inst{20-16} = rt;
+  let Inst{15-6}  = funct;
+  let Inst{5-0}   = 0x3c;
+}

llvm/lib/Target/Mips/MicroMips32r6InstrInfo.td

@@ -29,6 +29,7 @@ class AUI_MMR6_ENC : AUI_FM_MMR6;
 class BALC_MMR6_ENC  : BRANCH_OFF26_FM<0b101101>;
 class BC_MMR6_ENC : BRANCH_OFF26_FM<0b100101>;
 class BITSWAP_MMR6_ENC : POOL32A_BITSWAP_FM_MMR6<0b101100>;
+class BRK_MMR6_ENC : BREAK_MMR6_ENC<"break">;
 class BEQZALC_MMR6_ENC : CMP_BRANCH_1R_RT_OFF16_FM_MMR6<0b011101>;
 class BNEZALC_MMR6_ENC : CMP_BRANCH_1R_RT_OFF16_FM_MMR6<0b011111>;
 class BGTZALC_MMR6_ENC : CMP_BRANCH_1R_RT_OFF16_FM_MMR6<0b111000>;
@@ -40,6 +41,8 @@ class CLO_MMR6_ENC : POOL32A_2R_FM_MMR6<0b0100101100>;
 class CLZ_MMR6_ENC : SPECIAL_2R_FM_MMR6<0b010000>;
 class DIV_MMR6_ENC : ARITH_FM_MMR6<"div", 0x118>;
 class DIVU_MMR6_ENC : ARITH_FM_MMR6<"divu", 0x198>;
+class EHB_MMR6_ENC : BARRIER_MMR6_ENC<"ehb", 0x3>;
+class EI_MMR6_ENC : EIDI_MMR6_ENC<"ei", 0x15d>;
 class ERET_MMR6_ENC : ERET_FM_MMR6<"eret">;
 class ERETNC_MMR6_ENC : ERETNC_FM_MMR6<"eretnc">;
 class JIALC_MMR6_ENC : JMP_IDX_COMPACT_FM<0b100000>;
@@ -144,6 +147,8 @@ class BITSWAP_MMR6_DESC_BASE<string instr_asm, RegisterOperand GPROpnd>
 
 class BITSWAP_MMR6_DESC : BITSWAP_MMR6_DESC_BASE<"bitswap", GPR32Opnd>;
 
+class BRK_MMR6_DESC : BRK_FT<"break">;
+
 class CACHE_HINT_MMR6_DESC<string instr_asm, Operand MemOpnd,
                            RegisterOperand GPROpnd> : MMR6Arch<instr_asm> {
   dag OutOperandList = (outs);
@@ -166,6 +171,9 @@ class CLO_CLZ_MMR6_DESC_BASE<string instr_asm, RegisterOperand GPROpnd>
 class CLO_MMR6_DESC : CLO_CLZ_MMR6_DESC_BASE<"clo", GPR32Opnd>;
 class CLZ_MMR6_DESC : CLO_CLZ_MMR6_DESC_BASE<"clz", GPR32Opnd>;
 
+class EHB_MMR6_DESC : Barrier<"ehb">;
+class EI_MMR6_DESC : DEI_FT<"ei", GPR32Opnd>;
+
 class ERET_MMR6_DESC : ER_FT<"eret">;
 class ERETNC_MMR6_DESC : ER_FT<"eretnc">;
 
@@ -302,11 +310,14 @@ def BLTZALC_MMR6 : R6MMR6Rel, BLTZALC_MMR6_ENC, BLTZALC_MMR6_DESC,
                    ISA_MICROMIPS32R6;
 def BNEZALC_MMR6 : R6MMR6Rel, BNEZALC_MMR6_ENC, BNEZALC_MMR6_DESC,
                    ISA_MICROMIPS32R6;
+def BREAK_MMR6 : StdMMR6Rel, BRK_MMR6_DESC, BRK_MMR6_ENC, ISA_MICROMIPS32R6;
 def CACHE_MMR6 : R6MMR6Rel, CACHE_MMR6_ENC, CACHE_MMR6_DESC, ISA_MICROMIPS32R6;
 def CLO_MMR6 : R6MMR6Rel, CLO_MMR6_ENC, CLO_MMR6_DESC, ISA_MICROMIPS32R6;
 def CLZ_MMR6 : R6MMR6Rel, CLZ_MMR6_ENC, CLZ_MMR6_DESC, ISA_MICROMIPS32R6;
 def DIV_MMR6 : R6MMR6Rel, DIV_MMR6_DESC, DIV_MMR6_ENC, ISA_MICROMIPS32R6;
 def DIVU_MMR6 : R6MMR6Rel, DIVU_MMR6_DESC, DIVU_MMR6_ENC, ISA_MICROMIPS32R6;
+def EHB_MMR6 : StdMMR6Rel, EHB_MMR6_DESC, EHB_MMR6_ENC, ISA_MICROMIPS32R6;
+def EI_MMR6 : StdMMR6Rel, EI_MMR6_DESC, EI_MMR6_ENC, ISA_MICROMIPS32R6;
 def ERET_MMR6 : R6MMR6Rel, ERET_MMR6_DESC, ERET_MMR6_ENC, ISA_MICROMIPS32R6;
 def ERETNC_MMR6 : R6MMR6Rel, ERETNC_MMR6_DESC, ERETNC_MMR6_ENC,
                   ISA_MICROMIPS32R6;
@@ -335,3 +346,11 @@ def SUBU_MMR6 : StdMMR6Rel, SUBU_MMR6_DESC, SUBU_MMR6_ENC, ISA_MICROMIPS32R6;
 def XOR_MMR6 : StdMMR6Rel, XOR_MMR6_DESC, XOR_MMR6_ENC, ISA_MICROMIPS32R6;
 def XORI_MMR6 : StdMMR6Rel, XORI_MMR6_DESC, XORI_MMR6_ENC, ISA_MICROMIPS32R6;
 }
+
+//===----------------------------------------------------------------------===//
+//
+// MicroMips instruction aliases
+//
+//===----------------------------------------------------------------------===//
+
+def : MipsInstAlias<"ei", (EI_MMR6 ZERO), 1>, ISA_MICROMIPS32R6;

llvm/lib/Target/Mips/MicroMipsInstrInfo.td

@@ -934,3 +934,7 @@ class UncondBranchMMPseudo<string opstr> :
   def : MipsInstAlias<"nop", (SLL_MM ZERO, ZERO, 0), 1>;
   def : MipsInstAlias<"nop", (MOVE16_MM ZERO, ZERO), 1>;
 }
+
+let Predicates = [InMicroMips] in {
+def : MipsInstAlias<"ei", (EI_MM ZERO), 1>, ISA_MIPS32R2;
+}

llvm/lib/Target/Mips/MipsInstrInfo.td

@@ -1278,7 +1278,9 @@ def TTLTIU : MMRel, TEQI_FT<"tltiu", GPR32Opnd>, TEQI_FM<0xb>,
 def TNEI : MMRel, TEQI_FT<"tnei", GPR32Opnd>, TEQI_FM<0xe>,
            ISA_MIPS2_NOT_32R6_64R6;
 
-def BREAK : MMRel, BRK_FT<"break">, BRK_FM<0xd>;
+let AdditionalPredicates = [NotInMicroMips] in {
+def BREAK : MMRel, StdMMR6Rel, BRK_FT<"break">, BRK_FM<0xd>;
+}
 def SYSCALL : MMRel, SYS_FT<"syscall">, SYS_FM<0xc>;
 def TRAP : TrapBase<BREAK>;
 def SDBBP : MMRel, SYS_FT<"sdbbp">, SDBBP_FM, ISA_MIPS32_NOT_32R6_64R6;
@@ -1288,7 +1290,9 @@ def ERET : MMRel, ER_FT<"eret">, ER_FM<0x18>, INSN_MIPS3_32;
 }
 def DERET : MMRel, ER_FT<"deret">, ER_FM<0x1f>, ISA_MIPS32;
 
-def EI : MMRel, DEI_FT<"ei", GPR32Opnd>, EI_FM<1>, ISA_MIPS32R2;
+let AdditionalPredicates = [NotInMicroMips] in {
+def EI : MMRel, StdMMR6Rel, DEI_FT<"ei", GPR32Opnd>, EI_FM<1>, ISA_MIPS32R2;
+}
 def DI : MMRel, DEI_FT<"di", GPR32Opnd>, EI_FM<0>, ISA_MIPS32R2;
 
 let EncodingPredicates = []<Predicate>, // FIXME: Lack of HasStdEnc is probably a bug
@@ -1623,7 +1627,9 @@ def : MipsInstAlias<"syscall", (SYSCALL 0), 1>;
     
 def : MipsInstAlias<"break", (BREAK 0, 0), 1>;
 def : MipsInstAlias<"break $imm", (BREAK uimm10:$imm, 0), 1>;
+let AdditionalPredicates = [NotInMicroMips] in {
 def : MipsInstAlias<"ei", (EI ZERO), 1>, ISA_MIPS32R2;
+}
 def : MipsInstAlias<"di", (DI ZERO), 1>, ISA_MIPS32R2;
 
 def : MipsInstAlias<"teq $rs, $rt",

llvm/test/MC/Disassembler/Mips/micromips.txt

@@ -336,3 +336,7 @@
 0x46 0xce # CHECK: sdbbp16 14
 
 0x84 0x34 # CHECK: movep $5, $6, $2, $3
+
+0x00 0x00 0x57 0x7c # CHECK: ei
+
+0x00 0x0a 0x57 0x7c # CHECK: ei $10

llvm/test/MC/Disassembler/Mips/micromips32r6.txt

@@ -38,6 +38,12 @@
 
 0x00 0x44 0x0b 0x3c # CHECK: bitswap $4, $2
 
+0x00 0x00 0x00 0x07 # CHECK: break
+
+0x00 0x07 0x00 0x07 # CHECK: break 7
+
+0x00 0x07 0x01 0x47 # CHECK: break 7, 5
+
 0x20 0x25 0x60 0x08 # CHECK: cache 1, 8($5)
 
 0x01 0x65 0x4b 0x3c # CHECK: clo $11, $5
@@ -48,6 +54,12 @@
 
 0x00 0xa4 0x19 0x98 # CHECK: divu $3, $4, $5
 
+0x00 0x00 0x18 0x00 # CHECK: ehb
+
+0x00 0x00 0x57 0x7c # CHECK: ei
+
+0x00 0x0a 0x57 0x7c # CHECK: ei $10
+
 0x00 0x00 0xf3 0x7c # CHECK: eret
 
 0x00 0x01 0xf3 0x7c # CHECK: eretnc

llvm/test/MC/Disassembler/Mips/micromips_le.txt

@@ -336,3 +336,7 @@
 0xce 0x46 # CHECK: sdbbp16 14
 
 0x34 0x84 # CHECK: movep $5, $6, $2, $3
+
+0x00 0x00 0x7c 0x57 # CHECK: ei
+
+0x0a 0x00 0x7c 0x57 # CHECK: ei $10

llvm/test/MC/Mips/micromips32r6/invalid.s

@@ -0,0 +1,6 @@
+# RUN: not llvm-mc %s -triple=mips -show-encoding -mcpu=mips32r6 -mattr=micromips 2>%t1
+# RUN: FileCheck %s < %t1
+
+  break 1024               # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+  break 1023, 1024         # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction
+  ei $32                   # CHECK: :[[@LINE]]:{{[0-9]+}}: error: invalid operand for instruction

llvm/test/MC/Mips/micromips32r6/valid.s

@@ -20,11 +20,18 @@
   balc 14572256            # CHECK: balc 14572256       # encoding: [0xb4,0x37,0x96,0xb8]
   bc 14572256              # CHECK: bc 14572256         # encoding: [0x94,0x37,0x96,0xb8]
   bitswap $4, $2           # CHECK: bitswap $4, $2      # encoding: [0x00,0x44,0x0b,0x3c]
+  break                    # CHECK: break               # encoding: [0x00,0x00,0x00,0x07]
+  break 7                  # CHECK: break 7             # encoding: [0x00,0x07,0x00,0x07]
+  break 7, 5               # CHECK: break 7, 5          # encoding: [0x00,0x07,0x01,0x47]
   cache 1, 8($5)           # CHECK: cache 1, 8($5)      # encoding: [0x20,0x25,0x60,0x08]
   clo $11, $a1             # CHECK: clo $11, $5         # encoding: [0x01,0x65,0x4b,0x3c]
   clz $sp, $gp             # CHECK: clz $sp, $gp        # encoding: [0x03,0x80,0xe8,0x50]
   div $3, $4, $5           # CHECK: div $3, $4, $5      # encoding: [0x00,0xa4,0x19,0x18]
   divu $3, $4, $5          # CHECK: divu $3, $4, $5     # encoding: [0x00,0xa4,0x19,0x98]
+  ehb                      # CHECK: ehb                 # encoding: [0x00,0x00,0x18,0x00]
+  ei                       # CHECK: ei                  # encoding: [0x00,0x00,0x57,0x7c]
+  ei $0                    # CHECK: ei                  # encoding: [0x00,0x00,0x57,0x7c]
+  ei $10                   # CHECK: ei $10              # encoding: [0x00,0x0a,0x57,0x7c]
   eret                     # CHECK: eret                # encoding: [0x00,0x00,0xf3,0x7c]
   eretnc                   # CHECK: eretnc              # encoding: [0x00,0x01,0xf3,0x7c]
   jialc $5, 256            # CHECK: jialc $5, 256       # encoding: [0x80,0x05,0x01,0x00]