[mips][microMIPSr6] Implement BITSWAP instruction

Implement BITSWAP instruction using mapping.

Differential Revision: http://reviews.llvm.org/D8857

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235321 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Mips/MicroMips32r6InstrFormats.td b/lib/Target/Mips/MicroMips32r6InstrFormats.td
index 3b039e03fe1f881a2f938f765b3f52875016e0e6..1b2acc1f6ab3969fbef18b71f47b16f0a18a53f0 100644 (file)
--- a/lib/Target/Mips/MicroMips32r6InstrFormats.td
+++ b/lib/Target/Mips/MicroMips32r6InstrFormats.td
@@ -15,3 +15,17 @@ class MMR6Arch<string opstr> {
   string Arch = "micromipsr6";
   string BaseOpcode = opstr;
 }
+
+class POOL32A_BITSWAP_FM_MMR6<bits<6> funct> : MipsR6Inst {
+  bits<5> rd;
+  bits<5> rt;
+
+  bits<32> Inst;
+
+  let Inst{31-26} = 0b000000;
+  let Inst{25-21} = rt;
+  let Inst{20-16} = rd;
+  let Inst{15-12} = 0b0000;
+  let Inst{11-6} = funct;
+  let Inst{5-0} = 0b111100;
+}

diff --git a/lib/Target/Mips/MicroMips32r6InstrInfo.td b/lib/Target/Mips/MicroMips32r6InstrInfo.td
index e1c065447ce073b6d820ba73f994016ddcabe3da..acc7ba7f37e612ac5ec787cf8b7f6a3d05580cb9 100644 (file)
--- a/lib/Target/Mips/MicroMips32r6InstrInfo.td
+++ b/lib/Target/Mips/MicroMips32r6InstrInfo.td
@@ -19,6 +19,7 @@
 
 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>;
 
 //===----------------------------------------------------------------------===//
 //
@@ -40,6 +41,16 @@ class BALC_MMR6_DESC : BC_MMR6_DESC_BASE<"balc", brtarget26> {
 }
 class BC_MMR6_DESC : BC_MMR6_DESC_BASE<"bc", brtarget26>;
 
+class BITSWAP_MMR6_DESC_BASE<string instr_asm, RegisterOperand GPROpnd>
+    : MMR6Arch<instr_asm> {
+  dag OutOperandList = (outs GPROpnd:$rd);
+  dag InOperandList = (ins GPROpnd:$rt);
+  string AsmString = !strconcat(instr_asm, "\t$rd, $rt");
+  list<dag> Pattern = [];
+}
+
+class BITSWAP_MMR6_DESC : BITSWAP_MMR6_DESC_BASE<"bitswap", GPR32Opnd>;
+
 //===----------------------------------------------------------------------===//
 //
 // Instruction Definitions
@@ -49,4 +60,6 @@ class BC_MMR6_DESC : BC_MMR6_DESC_BASE<"bc", brtarget26>;
 let DecoderNamespace = "MicroMips32r6" in {
 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 BITSWAP_MMR6 : R6MMR6Rel, BITSWAP_MMR6_ENC, BITSWAP_MMR6_DESC,
+                   ISA_MICROMIPS32R6;
 }

diff --git a/lib/Target/Mips/Mips32r6InstrInfo.td b/lib/Target/Mips/Mips32r6InstrInfo.td
index 5f61349e091b2915d151d6a7c7c8a4b281a0e0ef..8651a83eaad856522a4c9be7cf7886d9696562c6 100644 (file)
--- a/lib/Target/Mips/Mips32r6InstrInfo.td
+++ b/lib/Target/Mips/Mips32r6InstrInfo.td
@@ -401,7 +401,8 @@ class JR_HB_R6_DESC : JR_HB_DESC_BASE<"jr.hb", GPR32Opnd> {
   bit isBarrier=1;
 }
 
-class BITSWAP_DESC_BASE<string instr_asm, RegisterOperand GPROpnd> {
+class BITSWAP_DESC_BASE<string instr_asm, RegisterOperand GPROpnd>
+    : MipsR6Arch<instr_asm> {
   dag OutOperandList = (outs GPROpnd:$rd);
   dag InOperandList = (ins GPROpnd:$rt);
   string AsmString = !strconcat(instr_asm, "\t$rd, $rt");
@@ -664,7 +665,7 @@ def BGEZALC : BGEZALC_ENC, BGEZALC_DESC, ISA_MIPS32R6;
 def BGEZC : BGEZC_ENC, BGEZC_DESC, ISA_MIPS32R6;
 def BGTZALC : BGTZALC_ENC, BGTZALC_DESC, ISA_MIPS32R6;
 def BGTZC : BGTZC_ENC, BGTZC_DESC, ISA_MIPS32R6;
-def BITSWAP : BITSWAP_ENC, BITSWAP_DESC, ISA_MIPS32R6;
+def BITSWAP : R6MMR6Rel, BITSWAP_ENC, BITSWAP_DESC, ISA_MIPS32R6;
 def BLEZALC : BLEZALC_ENC, BLEZALC_DESC, ISA_MIPS32R6;
 def BLEZC : BLEZC_ENC, BLEZC_DESC, ISA_MIPS32R6;
 def BLTC : BLTC_ENC, BLTC_DESC, ISA_MIPS32R6;

diff --git a/test/MC/Disassembler/Mips/micromips32r6.txt b/test/MC/Disassembler/Mips/micromips32r6.txt
index 0b1b78f33b05cb8216a813f81494a956a140b0a3..cbd7680962eaae070f76fc489a3021e02cc9bddd 100644 (file)
--- a/test/MC/Disassembler/Mips/micromips32r6.txt
+++ b/test/MC/Disassembler/Mips/micromips32r6.txt
@@ -5,3 +5,6 @@
 
 # CHECK: bc 14572256
 0x94 0x37 0x96 0xb8
+
+# CHECK: bitswap $4, $2
+0x00 0x44 0x0b 0x3c

diff --git a/test/MC/Mips/micromips32r6/valid.s b/test/MC/Mips/micromips32r6/valid.s
index e0e854450b989f6e23201f4e9bfbd52b0c8d6490..2ffa6a9607a4c69fcd21c3baedde83ac303bc9af 100644 (file)
--- a/test/MC/Mips/micromips32r6/valid.s
+++ b/test/MC/Mips/micromips32r6/valid.s
@@ -3,3 +3,4 @@
   .set noat
   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]