[ARMv8] Add MC support for the new load/store acquire/release instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189388 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 47 insertions, 7 deletions

diff --git a/lib/Target/ARM/ARMInstrFormats.td b/lib/Target/ARM/ARMInstrFormats.td
index 6d4de3d..e505e1a 100644
--- a/lib/Target/ARM/ARMInstrFormats.td
+++ b/lib/Target/ARM/ARMInstrFormats.td
@@ -500,8 +500,7 @@ class JTI<dag oops, dag iops, InstrItinClass itin,
   : XI<oops, iops, AddrModeNone, 0, IndexModeNone, BrMiscFrm, itin,
        asm, "", pattern>;
 
-// Atomic load/store instructions
-class AIldrex<bits<2> opcod, dag oops, dag iops, InstrItinClass itin,
+class AIldr_ex_or_acq<bits<2> opcod, bits<2> opcod2, dag oops, dag iops, InstrItinClass itin,
               string opc, string asm, list<dag> pattern>
   : I<oops, iops, AddrModeNone, 4, IndexModeNone, LdStExFrm, itin,
       opc, asm, "", pattern> {
@@ -512,23 +511,52 @@ class AIldrex<bits<2> opcod, dag oops, dag iops, InstrItinClass itin,
   let Inst{20}    = 1;
   let Inst{19-16} = addr;
   let Inst{15-12} = Rt;
-  let Inst{11-0}  = 0b111110011111;
+  let Inst{11-10} = 0b11;
+  let Inst{9-8}   = opcod2;
+  let Inst{7-0}   = 0b10011111;
 }
-class AIstrex<bits<2> opcod, dag oops, dag iops, InstrItinClass itin,
+class AIstr_ex_or_rel<bits<2> opcod, bits<2> opcod2, dag oops, dag iops, InstrItinClass itin,
               string opc, string asm, list<dag> pattern>
   : I<oops, iops, AddrModeNone, 4, IndexModeNone, LdStExFrm, itin,
       opc, asm, "", pattern> {
-  bits<4> Rd;
   bits<4> Rt;
   bits<4> addr;
   let Inst{27-23} = 0b00011;
   let Inst{22-21} = opcod;
   let Inst{20}    = 0;
   let Inst{19-16} = addr;
-  let Inst{15-12} = Rd;
-  let Inst{11-4}  = 0b11111001;
+  let Inst{11-10} = 0b11;
+  let Inst{9-8}   = opcod2;
+  let Inst{7-4}   = 0b1001;
   let Inst{3-0}   = Rt;
 }
+// Atomic load/store instructions
+class AIldrex<bits<2> opcod, dag oops, dag iops, InstrItinClass itin,
+              string opc, string asm, list<dag> pattern>
+  : AIldr_ex_or_acq<opcod, 0b11, oops, iops, itin, opc, asm, pattern>;
+
+class AIstrex<bits<2> opcod, dag oops, dag iops, InstrItinClass itin,
+              string opc, string asm, list<dag> pattern>
+  : AIstr_ex_or_rel<opcod, 0b11, oops, iops, itin, opc, asm, pattern> {
+  bits<4> Rd;
+  let Inst{15-12} = Rd;
+}
+
+// Exclusive load/store instructions
+
+class AIldaex<bits<2> opcod, dag oops, dag iops, InstrItinClass itin,
+              string opc, string asm, list<dag> pattern>
+  : AIldr_ex_or_acq<opcod, 0b10, oops, iops, itin, opc, asm, pattern>,
+    Requires<[IsARM, HasV8]>;
+
+class AIstlex<bits<2> opcod, dag oops, dag iops, InstrItinClass itin,
+              string opc, string asm, list<dag> pattern>
+  : AIstr_ex_or_rel<opcod, 0b10, oops, iops, itin, opc, asm, pattern>,
+    Requires<[IsARM, HasV8]> {
+  bits<4> Rd;
+  let Inst{15-12} = Rd;
+}
+
 class AIswp<bit b, dag oops, dag iops, string opc, list<dag> pattern>
   : AI<oops, iops, MiscFrm, NoItinerary, opc, "\t$Rt, $Rt2, $addr", pattern> {
   bits<4> Rt;
@@ -545,6 +573,18 @@ class AIswp<bit b, dag oops, dag iops, string opc, list<dag> pattern>
   let Unpredictable{11-8} = 0b1111;
   let DecoderMethod = "DecodeSwap";
 }
+// Acquire/Release load/store instructions
+class AIldracq<bits<2> opcod, dag oops, dag iops, InstrItinClass itin,
+              string opc, string asm, list<dag> pattern>
+  : AIldr_ex_or_acq<opcod, 0b00, oops, iops, itin, opc, asm, pattern>,
+    Requires<[IsARM, HasV8]>;
+
+class AIstrrel<bits<2> opcod, dag oops, dag iops, InstrItinClass itin,
+              string opc, string asm, list<dag> pattern>
+  : AIstr_ex_or_rel<opcod, 0b00, oops, iops, itin, opc, asm, pattern>,
+    Requires<[IsARM, HasV8]> {
+  let Inst{15-12}   = 0b1111;
+}
 
 // addrmode1 instructions
 class AI1<bits<4> opcod, dag oops, dag iops, Format f, InstrItinClass itin,