[mips][microMIPS] Implement JALRS16 instruction

Differential Revision: http://reviews.llvm.org/D5027

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219493 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index cdab2ba556802588f2f10fdd996056851a7b2bab..21d2876fdd0b78fef94fbe56204638b775987927 100644 (file)
--- a/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -991,6 +991,7 @@ static bool hasShortDelaySlot(unsigned Opcode) {
   switch (Opcode) {
     case Mips::JALS_MM:
     case Mips::JALRS_MM:
+    case Mips::JALRS16_MM:
     case Mips::BGEZALS_MM:
     case Mips::BLTZALS_MM:
       return true;

diff --git a/lib/Target/Mips/MicroMipsInstrInfo.td b/lib/Target/Mips/MicroMipsInstrInfo.td
index 8158929d6230ac3550c7df4e01a289052d85a461..1ff67546be8572d55694c3ec6fe522d27833620e 100644 (file)
--- a/lib/Target/Mips/MicroMipsInstrInfo.td
+++ b/lib/Target/Mips/MicroMipsInstrInfo.td
@@ -119,6 +119,15 @@ class JumpRAddiuStackMM16 :
   let isIndirectBranch = 1;
 }
 
+// 16-bit Jump and Link (Call) - Short Delay Slot
+class JumpLinkRegSMM16<string opstr, RegisterOperand RO> :
+  MicroMipsInst16<(outs), (ins RO:$rs), !strconcat(opstr, "\t$rs"),
+           [], IIBranch, FrmR> {
+  let isCall = 1;
+  let hasDelaySlot = 1;
+  let Defs = [RA];
+}
+
 // MicroMIPS Jump and Link (Call) - Short Delay Slot
 let isCall = 1, hasDelaySlot = 1, Defs = [RA] in {
   class JumpLinkMM<string opstr, DAGOperand opnd> :
@@ -141,6 +150,7 @@ def MFHI16_MM : MoveFromHILOMM<"mfhi", GPR32Opnd, AC0>, MFHILO_FM_MM16<0x10>;
 def MFLO16_MM : MoveFromHILOMM<"mflo", GPR32Opnd, AC0>, MFHILO_FM_MM16<0x12>;
 def MOVE16_MM : MoveMM16<"move", GPR32Opnd>, MOVE_FM_MM16<0x03>;
 def JALR16_MM : JumpLinkRegMM16<"jalr", GPR32Opnd>, JALR_FM_MM16<0x0e>;
+def JALRS16_MM : JumpLinkRegSMM16<"jalrs16", GPR32Opnd>, JALR_FM_MM16<0x0f>;
 def JRADDIUSP : JumpRAddiuStackMM16, JRADDIUSP_FM_MM16<0x18>;
 
 class WaitMM<string opstr> :

diff --git a/test/MC/Mips/micromips-16-bit-instructions.s b/test/MC/Mips/micromips-16-bit-instructions.s
index ca01f94a7f9f1de7b2ef61dd8441d17e1488a954..98ec6d6c68d23d47cb3d3b73f7efe72d7bf3857b 100644 (file)
--- a/test/MC/Mips/micromips-16-bit-instructions.s
+++ b/test/MC/Mips/micromips-16-bit-instructions.s
@@ -15,6 +15,8 @@
 # CHECK-EL: jalr    $9              # encoding: [0xc9,0x45]
 # CHECK-EL: jraddiusp 20            # encoding: [0x05,0x47]
 # CHECK-EL: nop                     # encoding: [0x00,0x00,0x00,0x00]
+# CHECK-EL: jalrs16 $9              # encoding: [0xe9,0x45]
+# CHECK-EL: move    $zero, $zero    # encoding: [0x00,0x0c]
 #------------------------------------------------------------------------------
 # Big endian
 #------------------------------------------------------------------------------
@@ -24,9 +26,12 @@
 # CHECK-EB: jalr    $9              # encoding: [0x45,0xc9]
 # CHECK-EB: jraddiusp 20            # encoding: [0x47,0x05]
 # CHECK-EB: nop                     # encoding: [0x00,0x00,0x00,0x00]
+# CHECK-EB: jalrs16 $9              # encoding: [0x45,0xe9]
+# CHECK-EB: move    $zero, $zero    # encoding: [0x0c,0x00]
 
     mfhi    $9
     mflo    $9
     move    $25, $1
     jalr    $9
     jraddiusp 20
+    jalrs16 $9