Add definition of a base class for logical shift/rotate immediate instructions

and have 32-bit and 64-bit instructions derive from it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142207 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 33 insertions, 27 deletions

diff --git a/lib/Target/Mips/Mips64InstrInfo.td b/lib/Target/Mips/Mips64InstrInfo.td
index 7d55cce..4686699 100644
--- a/lib/Target/Mips/Mips64InstrInfo.td
+++ b/lib/Target/Mips/Mips64InstrInfo.td
@@ -40,14 +40,16 @@ def imm32_63 : ImmLeaf<i64,
 // Instructions specific format
 //===----------------------------------------------------------------------===//
 // Shifts
-class LogicR_shift_rotate_imm64<bits<6> func, bits<5> _rs, string instr_asm,
-                                SDNode OpNode, PatFrag PF>:
-  FR<0x00, func, (outs CPU64Regs:$dst), (ins CPU64Regs:$b, shamt_64:$c),
-     !strconcat(instr_asm, "\t$dst, $b, $c"),
-     [(set CPU64Regs:$dst, (OpNode CPU64Regs:$b, (i64 PF:$c)))],
-     IIAlu> {
-  let rs = _rs;
-}
+// 64-bit shift instructions.
+class shift_rotate_imm64<bits<6> func, bits<5> isRotate, string instr_asm,
+                         SDNode OpNode>:
+  shift_rotate_imm<func, isRotate, instr_asm, OpNode, immZExt5_64, shamt_64,
+                   CPU64Regs>;
+
+class shift_rotate_imm64_32<bits<6> func, bits<5> isRotate, string instr_asm,
+                            SDNode OpNode>:
+  shift_rotate_imm<func, isRotate, instr_asm, OpNode, imm32_63, shamt_64,
+                   CPU64Regs>;
 
 class LogicR_shift_rotate_reg64<bits<6> func, bits<5> _shamt, string instr_asm,
                                 SDNode OpNode>:
@@ -116,22 +118,20 @@ def XOR64    : ArithLogicR<0x00, 0x26, "xor", xor, IIAlu, CPU64Regs, 1>;
 def NOR64    : LogicNOR<0x00, 0x27, "nor", CPU64Regs>;
 
 /// Shift Instructions
-def DSLL     : LogicR_shift_rotate_imm64<0x38, 0x00, "dsll", shl, immZExt5_64>;
-def DSRL     : LogicR_shift_rotate_imm64<0x3a, 0x00, "dsrl", srl, immZExt5_64>;
-def DSRA     : LogicR_shift_rotate_imm64<0x3b, 0x00, "dsra", sra, immZExt5_64>;
-def DSLL32   : LogicR_shift_rotate_imm64<0x3c, 0x00, "dsll32", shl, imm32_63>;
-def DSRL32   : LogicR_shift_rotate_imm64<0x3e, 0x00, "dsrl32", srl, imm32_63>;
-def DSRA32   : LogicR_shift_rotate_imm64<0x3f, 0x00, "dsra32", sra, imm32_63>;
+def DSLL     : shift_rotate_imm64<0x38, 0x00, "dsll", shl>;
+def DSRL     : shift_rotate_imm64<0x3a, 0x00, "dsrl", srl>;
+def DSRA     : shift_rotate_imm64<0x3b, 0x00, "dsra", sra>;
+def DSLL32   : shift_rotate_imm64_32<0x3c, 0x00, "dsll32", shl>;
+def DSRL32   : shift_rotate_imm64_32<0x3e, 0x00, "dsrl32", srl>;
+def DSRA32   : shift_rotate_imm64_32<0x3f, 0x00, "dsra32", sra>;
 def DSLLV    : LogicR_shift_rotate_reg64<0x24, 0x00, "dsllv", shl>;
 def DSRLV    : LogicR_shift_rotate_reg64<0x26, 0x00, "dsrlv", srl>;
 def DSRAV    : LogicR_shift_rotate_reg64<0x27, 0x00, "dsrav", sra>;
 
 // Rotate Instructions
 let Predicates = [HasMips64r2] in {
-  def DROTR    : LogicR_shift_rotate_imm64<0x3a, 0x01, "drotr", rotr,
-                                           immZExt5_64>;
-  def DROTR32  : LogicR_shift_rotate_imm64<0x3e, 0x01, "drotr32", rotr,
-                                           imm32_63>;
+  def DROTR    : shift_rotate_imm64<0x3a, 0x01, "drotr", rotr>;
+  def DROTR32  : shift_rotate_imm64_32<0x3e, 0x01, "drotr32", rotr>;
   def DROTRV   : LogicR_shift_rotate_reg64<0x16, 0x01, "drotrv", rotr>;
 }
 
diff --git a/lib/Target/Mips/MipsInstrInfo.td b/lib/Target/Mips/MipsInstrInfo.td
index 5070106..2b06469 100644
--- a/lib/Target/Mips/MipsInstrInfo.td
+++ b/lib/Target/Mips/MipsInstrInfo.td
@@ -299,14 +299,20 @@ class LogicNOR<bits<6> op, bits<6> func, string instr_asm, RegisterClass RC>:
 }
 
 // Shifts
-class LogicR_shift_rotate_imm<bits<6> func, bits<5> _rs, string instr_asm,
-                              SDNode OpNode>:
-  FR<0x00, func, (outs CPURegs:$rd), (ins CPURegs:$rt, shamt:$shamt),
+class shift_rotate_imm<bits<6> func, bits<5> isRotate, string instr_asm,
+                       SDNode OpNode, PatFrag PF, Operand ImmOpnd,
+                       RegisterClass RC>:
+  FR<0x00, func, (outs RC:$rd), (ins RC:$rt, ImmOpnd:$shamt),
      !strconcat(instr_asm, "\t$rd, $rt, $shamt"),
-     [(set CPURegs:$rd, (OpNode CPURegs:$rt, (i32 immZExt5:$shamt)))], IIAlu> {
-  let rs = _rs;
+     [(set RC:$rd, (OpNode RC:$rt, PF:$shamt))], IIAlu> {
+  let rs = isRotate;
 }
 
+// 32-bit shift instructions.
+class shift_rotate_imm32<bits<6> func, bits<5> isRotate, string instr_asm,
+                         SDNode OpNode>:
+  shift_rotate_imm<func, isRotate, instr_asm, OpNode, immZExt5, shamt, CPURegs>;
+
 class LogicR_shift_rotate_reg<bits<6> func, bits<5> isRotate, string instr_asm,
                               SDNode OpNode>:
   FR<0x00, func, (outs CPURegs:$rd), (ins CPURegs:$rs, CPURegs:$rt),
@@ -650,16 +656,16 @@ def XOR     : ArithLogicR<0x00, 0x26, "xor", xor, IIAlu, CPURegs, 1>;
 def NOR     : LogicNOR<0x00, 0x27, "nor", CPURegs>;
 
 /// Shift Instructions
-def SLL     : LogicR_shift_rotate_imm<0x00, 0x00, "sll", shl>;
-def SRL     : LogicR_shift_rotate_imm<0x02, 0x00, "srl", srl>;
-def SRA     : LogicR_shift_rotate_imm<0x03, 0x00, "sra", sra>;
+def SLL     : shift_rotate_imm32<0x00, 0x00, "sll", shl>;
+def SRL     : shift_rotate_imm32<0x02, 0x00, "srl", srl>;
+def SRA     : shift_rotate_imm32<0x03, 0x00, "sra", sra>;
 def SLLV    : LogicR_shift_rotate_reg<0x04, 0x00, "sllv", shl>;
 def SRLV    : LogicR_shift_rotate_reg<0x06, 0x00, "srlv", srl>;
 def SRAV    : LogicR_shift_rotate_reg<0x07, 0x00, "srav", sra>;
 
 // Rotate Instructions
 let Predicates = [HasMips32r2] in {
-    def ROTR    : LogicR_shift_rotate_imm<0x02, 0x01, "rotr", rotr>;
+    def ROTR    : shift_rotate_imm32<0x02, 0x01, "rotr", rotr>;
     def ROTRV   : LogicR_shift_rotate_reg<0x06, 0x01, "rotrv", rotr>;
 }