diff a/src/hotspot/cpu/aarch64/assembler_aarch64.hpp b/src/hotspot/cpu/aarch64/assembler_aarch64.hpp
--- a/src/hotspot/cpu/aarch64/assembler_aarch64.hpp
+++ b/src/hotspot/cpu/aarch64/assembler_aarch64.hpp
@@ -271,10 +271,18 @@
 
   void rf(FloatRegister r, int lsb) {
     f(r->encoding_nocheck(), lsb + 4, lsb);
   }
 
+  void prf(PRegister r, int lsb) {
+    f(r->encoding_nocheck(), lsb + 3, lsb);
+  }
+
+  void pgrf(PRegister r, int lsb) {
+    f(r->encoding_nocheck(), lsb + 2, lsb);
+  }
+
   unsigned get(int msb = 31, int lsb = 0) {
     int nbits = msb - lsb + 1;
     unsigned mask = ((1U << nbits) - 1) << lsb;
     assert_cond((bits & mask) == mask);
     return (insn & mask) >> lsb;
@@ -676,10 +684,16 @@
     current->zrf(reg, lsb);
   }
   void rf(FloatRegister reg, int lsb) {
     current->rf(reg, lsb);
   }
+  void prf(PRegister reg, int lsb) {
+    current->prf(reg, lsb);
+  }
+  void pgrf(PRegister reg, int lsb) {
+    current->pgrf(reg, lsb);
+  }
   void fixed(unsigned value, unsigned mask) {
     current->fixed(value, mask);
   }
 
   void emit() {