[mips][microMIPSr6] Implement LSA instruction

[jkolek]

Summary

This patch implements LSA instruction using mapping.

[zoran.jovanovic]

LGTM with a nit.

test/MC/Disassembler/Mips/micromips32r6.txt

60

Nit: Please use the single-line style.

lib/Target/Mips/MicroMips32r6InstrFormats.td

class CACHE_PREF_FM_MMR6<bits<6> opgroup, bits<4> funct> : MipsR6Inst {
   bits<32> Inst;
 
   let Inst{31-26} = opgroup;
   let Inst{25-21} = hint;
   let Inst{20-16} = addr{20-16};
   let Inst{15-12} = funct;
   let Inst{11-0}  = addr{11-0};
 }
+
+class POOL32A_LSA_FM<bits<6> funct> : MipsR6Inst {
+  bits<5> rd;
+  bits<5> rs;
+  bits<5> rt;
+  bits<2> imm2;
+
+  bits<32> Inst;
+
+  let Inst{31-26} = 0b000000;
+  let Inst{25-21} = rt;
+  let Inst{20-16} = rs;
+  let Inst{15-11} = rd;
+  let Inst{10-9}  = imm2;
+  let Inst{8-6}   = 0b000;
+  let Inst{5-0}   = funct;
+}

lib/Target/Mips/MicroMips32r6InstrInfo.td

 class BITSWAP_MMR6_ENC : POOL32A_BITSWAP_FM_MMR6<0b101100>;
 class CACHE_MMR6_ENC : CACHE_PREF_FM_MMR6<0b001000, 0b0110>;
 class PREF_MMR6_ENC : CACHE_PREF_FM_MMR6<0b011000, 0b0010>;
 class CLO_MMR6_ENC : POOL32A_2R_FM_MMR6<0b0100101100>;
 class CLZ_MMR6_ENC : SPECIAL_2R_FM_MMR6<0b010000>;
 class JIALC_MMR6_ENC : JMP_IDX_COMPACT_FM<0b101001>;
 class JIC_MMR6_ENC   : JMP_IDX_COMPACT_FM<0b101000>;
 class LL_MMR6_ENC : POOL32C_LL_SC_FM<0b0011>;
+class LSA_MMR6_ENC : POOL32A_LSA_FM<0b001111>;
 class LWPC_MMR6_ENC  : PCREL19_FM_MMR6<0b01>;
 class SC_MMR6_ENC : POOL32C_LL_SC_FM<0b1011>;
 class SELEQZ_MMR6_ENC : POOL32A_FM_MMR6<0b0101000000>;
 class SELNEZ_MMR6_ENC : POOL32A_FM_MMR6<0b0110000000>;
 
 //===----------------------------------------------------------------------===//
 //
 // Instruction Descriptions
class LL_MMR6_DESC_BASE<string instr_asm, RegisterOperand GPROpnd>
   dag InOperandList = (ins mem_simm9:$addr);
   string AsmString = !strconcat(instr_asm, "\t$rt, $addr");
   list<dag> Pattern = [];
   bit mayLoad = 1;
 }
 
 class LL_MMR6_DESC : LL_MMR6_DESC_BASE<"ll", GPR32Opnd>;
 
+class LSA_MMR6_DESC_BASE<string instr_asm, RegisterOperand GPROpnd,
+                         Operand ImmOpnd> : MMR6Arch<instr_asm> {
+  dag OutOperandList = (outs GPROpnd:$rd);
+  dag InOperandList = (ins GPROpnd:$rs, GPROpnd:$rt, ImmOpnd:$imm2);
+  string AsmString = !strconcat(instr_asm, "\t$rt, $rs, $rd, $imm2");
+  list<dag> Pattern = [];
+}
+
+class LSA_MMR6_DESC : LSA_MMR6_DESC_BASE<"lsa", GPR32Opnd, uimm2>;
+
 class SC_MMR6_DESC_BASE<string instr_asm, RegisterOperand GPROpnd>
     : MMR6Arch<instr_asm> {
   dag OutOperandList = (outs GPROpnd:$dst);
   dag InOperandList = (ins GPROpnd:$rt, mem_simm9:$addr);
   string AsmString = !strconcat(instr_asm, "\t$rt, $addr");
   list<dag> Pattern = [];
   bit mayStore = 1;
   string Constraints = "$rt = $dst";

 def BITSWAP_MMR6 : R6MMR6Rel, BITSWAP_MMR6_ENC, BITSWAP_MMR6_DESC,
                    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 JIALC_MMR6 : R6MMR6Rel, JIALC_MMR6_ENC, JIALC_MMR6_DESC, ISA_MICROMIPS32R6;
 def JIC_MMR6 : R6MMR6Rel, JIC_MMR6_ENC, JIC_MMR6_DESC, ISA_MICROMIPS32R6;
 def LL_MMR6 : R6MMR6Rel, LL_MMR6_ENC, LL_MMR6_DESC, ISA_MICROMIPS32R6;
+def LSA_MMR6 : R6MMR6Rel, LSA_MMR6_ENC, LSA_MMR6_DESC, ISA_MICROMIPS32R6;
 def LWPC_MMR6 : R6MMR6Rel, LWPC_MMR6_ENC, LWPC_MMR6_DESC, ISA_MICROMIPS32R6;
 def PREF_MMR6 : R6MMR6Rel, PREF_MMR6_ENC, PREF_MMR6_DESC, ISA_MICROMIPS32R6;
 def SC_MMR6 : R6MMR6Rel, SC_MMR6_ENC, SC_MMR6_DESC, ISA_MICROMIPS32R6;
 def SELEQZ_MMR6 : R6MMR6Rel, SELEQZ_MMR6_ENC, SELEQZ_MMR6_DESC,
                   ISA_MICROMIPS32R6;
 def SELNEZ_MMR6 : R6MMR6Rel, SELNEZ_MMR6_ENC, SELNEZ_MMR6_DESC,
                   ISA_MICROMIPS32R6;
 }

lib/Target/Mips/Mips32r6InstrInfo.td

class COP2ST_DESC_BASE<string instr_asm, RegisterOperand COPOpnd> {
   bit mayStore = 1;
   string DecoderMethod = "DecodeFMemCop2R6";
 }
 
 class SDC2_R6_DESC : COP2ST_DESC_BASE<"sdc2", COP2Opnd>;
 class SWC2_R6_DESC : COP2ST_DESC_BASE<"swc2", COP2Opnd>;
 
 class LSA_R6_DESC_BASE<string instr_asm, RegisterOperand GPROpnd,
-                       Operand ImmOpnd> {
+                       Operand ImmOpnd> : MipsR6Arch<instr_asm> {
   dag OutOperandList = (outs GPROpnd:$rd);
   dag InOperandList = (ins GPROpnd:$rs, GPROpnd:$rt, ImmOpnd:$imm2);
   string AsmString = !strconcat(instr_asm, "\t$rd, $rs, $rt, $imm2");
   list<dag> Pattern = [];
 }
 
 class LSA_R6_DESC : LSA_R6_DESC_BASE<"lsa", GPR32Opnd, uimm2>;
 

 defm D : CMP_CC_M<FIELD_CMP_FORMAT_D, "d", FGR64Opnd>;
 def DIV : DIV_ENC, DIV_DESC, ISA_MIPS32R6;
 def DIVU : DIVU_ENC, DIVU_DESC, ISA_MIPS32R6;
 def JIALC : R6MMR6Rel, JIALC_ENC, JIALC_DESC, ISA_MIPS32R6;
 def JIC : R6MMR6Rel, JIC_ENC, JIC_DESC, ISA_MIPS32R6;
 def JR_HB_R6 : JR_HB_R6_ENC, JR_HB_R6_DESC, ISA_MIPS32R6;
 def LDC2_R6 : LDC2_R6_ENC, LDC2_R6_DESC, ISA_MIPS32R6;
 def LL_R6 : R6MMR6Rel, LL_R6_ENC, LL_R6_DESC, ISA_MIPS32R6;
-def LSA_R6 : LSA_R6_ENC, LSA_R6_DESC, ISA_MIPS32R6;
+def LSA_R6 : R6MMR6Rel, LSA_R6_ENC, LSA_R6_DESC, ISA_MIPS32R6;
 def LWC2_R6 : LWC2_R6_ENC, LWC2_R6_DESC, ISA_MIPS32R6;
 def LWPC : R6MMR6Rel, LWPC_ENC, LWPC_DESC, ISA_MIPS32R6;
 def LWUPC : LWUPC_ENC, LWUPC_DESC, ISA_MIPS32R6;
 def MADDF_S : MADDF_S_ENC, MADDF_S_DESC, ISA_MIPS32R6;
 def MADDF_D : MADDF_D_ENC, MADDF_D_DESC, ISA_MIPS32R6;
 def MAXA_D : MAXA_D_ENC, MAXA_D_DESC, ISA_MIPS32R6;
 def MAXA_S : MAXA_S_ENC, MAXA_S_DESC, ISA_MIPS32R6;
 def MAX_D : MAX_D_ENC, MAX_D_DESC, ISA_MIPS32R6;

test/MC/Disassembler/Mips/micromips32r6.txt

 # CHECK: sc $15, -40($19)
 0x61 0xf3 0xbf 0xd8
 
 # CHECK: cache 1, 8($5)
 0x20 0x25 0x60 0x08
 
 # CHECK: pref 1, 8($5)
 0x60 0x25 0x20 0x08
+
+# CHECK: lsa $2, $3, $4, 3
+0x00 0x43 0x26 0x0f

test/MC/Mips/micromips32r6/valid.s

 # RUN: llvm-mc %s -triple=mips-unknown-linux -show-encoding -mcpu=mips32r6 -mattr=micromips | FileCheck %s
 
   .set noat
   align $4, $2, $3, 2      # CHECK: align $4, $2, $3, 2 # encoding: [0x00,0x43,0x24,0x1f]
   aui $3,$2,-23            # CHECK: aui $3, $2, -23     # encoding: [0x10,0x43,0xff,0xe9]
   aluipc $3, 56            # CHECK: aluipc $3, 56       # encoding: [0x78,0x7f,0x00,0x38]
   auipc $3, -1             # CHECK: auipc $3, -1        # encoding: [0x78,0x7e,0xff,0xff]
   addiupc $4, 100          # CHECK: addiupc $4, 100     # encoding: [0x78,0x80,0x00,0x19]
   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]
   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]
   jialc $5, 256            # CHECK: jialc $5, 256       # encoding: [0xa4,0x05,0x01,0x00]
   jic   $5, 256            # CHECK: jic $5, 256         # encoding: [0xa0,0x05,0x01,0x00]
+  lsa $2, $3, $4, 3        # CHECK: lsa  $2, $3, $4, 3  # encoding: [0x00,0x43,0x26,0x0f]
   lwpc    $2,268           # CHECK: lwpc $2, 268        # encoding: [0x78,0x48,0x00,0x43]
   pref 1, 8($5)            # CHECK: pref 1, 8($5)       # encoding: [0x60,0x25,0x20,0x08]
   seleqz $2,$3,$4          # CHECK: seleqz $2, $3, $4   # encoding: [0x00,0x83,0x11,0x40]
   selnez $2,$3,$4          # CHECK: selnez $2, $3, $4   # encoding: [0x00,0x83,0x11,0x80]
   ll $v0,-153($s2)         # CHECK: ll $2, -153($18)    # encoding: [0x60,0x52,0x3f,0x67]
   sc $15,-40($s3)          # CHECK: sc $15, -40($19)    # encoding: [0x61,0xf3,0xbf,0xd8]