[SPARC] Recognize the prefetch instruction

Reviewed By: LemonBoy

Differential Revision: https://reviews.llvm.org/D96311

diff --git a/llvm/lib/Target/Sparc/SparcInstrInfo.td b/llvm/lib/Target/Sparc/SparcInstrInfo.td
index b161e2a..4b8c3a6 100644 (file)
--- a/llvm/lib/Target/Sparc/SparcInstrInfo.td
+++ b/llvm/lib/Target/Sparc/SparcInstrInfo.td
@@ -1623,6 +1623,17 @@ let hasSideEffects = 1 in {
 }
 }
 
+// Section A.42 - Prefetch Data
+let Predicates = [HasV9] in {
+  def PREFETCHr : F3_1<3, 0b101101,
+                   (outs), (ins MEMrr:$addr, shift_imm5:$rd),
+                   "prefetch [$addr], $rd", []>;
+  def PREFETCHi : F3_2<3, 0b101101,
+                   (outs), (ins MEMri:$addr, shift_imm5:$rd),
+                   "prefetch [$addr], $rd", []>;
+}
+
+
 
 // Section A.43 - Read Privileged Register Instructions
 let Predicates = [HasV9] in {

diff --git a/llvm/test/MC/Sparc/sparcv9-instructions.s b/llvm/test/MC/Sparc/sparcv9-instructions.s
index 6a88375..7b130de 100644 (file)
--- a/llvm/test/MC/Sparc/sparcv9-instructions.s
+++ b/llvm/test/MC/Sparc/sparcv9-instructions.s
@@ -301,3 +301,13 @@
 
         ! V9: st %o1, [%o0]             ! encoding: [0xd2,0x22,0x00,0x00]
         stw %o1, [%o0]
+
+        ! V8:      error: instruction requires a CPU feature not currently enabled
+        ! V8-NEXT: prefetch  [ %i1 + 0xf80 ], 1
+        ! V9: prefetch  [%i1+3968], 1  ! encoding: [0xc3,0x6e,0x6f,0x80]
+        prefetch  [ %i1 + 0xf80 ], 1
+
+        ! V8:      error: instruction requires a CPU feature not currently enabled
+        ! V8-NEXT: prefetch  [ %i1 + %i2 ], 1
+        ! V9: prefetch  [%i1+%i2], 1  ! encoding: [0xc3,0x6e,0x40,0x1a]
+        prefetch  [ %i1 + %i2 ], 1