[PATCH] [mips][microMIPSr6] Implement SUB and SUBU instructions

[Zoran Jovanovic]

Hi dsanders, jkolek,

http://reviews.llvm.org/D8764

Files:
  lib/Target/Mips/MicroMips32r6InstrInfo.td
  test/MC/Disassembler/Mips/micromips32r6.txt
  test/MC/Mips/micromips32r6/valid.s

Index: lib/Target/Mips/MicroMips32r6InstrInfo.td
===================================================================
--- lib/Target/Mips/MicroMips32r6InstrInfo.td
+++ lib/Target/Mips/MicroMips32r6InstrInfo.td
@@ -21,6 +21,8 @@
 class ADDU_MMR6_ENC : ARITH_FM_MMR6<"addu", 0x150>;
 class BALC_MMR6_ENC  : BRANCH_OFF26_FM<0b101101>;
 class BC_MMR6_ENC : BRANCH_OFF26_FM<0b100101>;
+class SUB_MMR6_ENC : ARITH_FM_MMR6<"sub", 0x190>;
+class SUBU_MMR6_ENC : ARITH_FM_MMR6<"subu", 0x1d0>;
 
 //===----------------------------------------------------------------------===//
 //
@@ -45,6 +47,8 @@
   list<Register> Defs = [RA];
 }
 class BC_MMR6_DESC : BC_MMR6_DESC_BASE<"bc", brtarget26>;
+class SUB_MMR6_DESC : ArithLogicR<"sub", GPR32Opnd>;
+class SUBU_MMR6_DESC : ArithLogicR<"subu", GPR32Opnd>;
 
 //===----------------------------------------------------------------------===//
 //
@@ -58,4 +62,6 @@
 def ADDU_MMR6 : StdMMR6Rel, ADDU_MMR6_DESC, ADDU_MMR6_ENC, ISA_MICROMIPS32R6;
 def BALC_MMR6 : R6MMR6Rel, BALC_MMR6_ENC, BALC_MMR6_DESC, ISA_MICROMIPS32R6;
 def BC_MMR6 : R6MMR6Rel, BC_MMR6_ENC, BC_MMR6_DESC, ISA_MICROMIPS32R6;
+def SUB_MMR6 : StdMMR6Rel, SUB_MMR6_DESC, SUB_MMR6_ENC, ISA_MICROMIPS32R6;
+def SUBU_MMR6 : StdMMR6Rel, SUBU_MMR6_DESC, SUBU_MMR6_ENC, ISA_MICROMIPS32R6;
 }
Index: test/MC/Disassembler/Mips/micromips32r6.txt
===================================================================
--- test/MC/Disassembler/Mips/micromips32r6.txt
+++ test/MC/Disassembler/Mips/micromips32r6.txt
@@ -14,3 +14,9 @@
 
 # CHECK: bc 14572256
 0x94 0x37 0x96 0xb8
+
+# CHECK: sub $3, $4, $5
+0x00 0xa4 0x19 0x90
+
+# CHECK: subu $3, $4, $5
+0x00 0xa4 0x19 0xd0
Index: test/MC/Mips/micromips32r6/valid.s
===================================================================
--- test/MC/Mips/micromips32r6/valid.s
+++ test/MC/Mips/micromips32r6/valid.s
@@ -6,3 +6,5 @@
   addu $3, $4, $5          # CHECK: addu $3, $4, $5     # encoding: [0x00,0xa4,0x19,0x50]
   balc 14572256            # CHECK: balc 14572256       # encoding: [0xb4,0x37,0x96,0xb8]
   bc 14572256              # CHECK: bc 14572256         # encoding: [0x94,0x37,0x96,0xb8]
+  sub $3, $4, $5           # CHECK: sub $3, $4, $5      # encoding: [0x00,0xa4,0x19,0x90]
+  subu $3, $4, $5          # CHECK: subu $3, $4, $5     # encoding: [0x00,0xa4,0x19,0xd0]

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