diff --git a/target/sparc/insns.decode b/target/sparc/insns.decode
index 82c484fbc7..aa452f1d00 100644
--- a/target/sparc/insns.decode
+++ b/target/sparc/insns.decode
@@ -231,6 +231,9 @@ RESTORE     10 ..... 111101 ..... . .............          @r_r_ri
 DONE        10 00000 111110 00000 0 0000000000000
 RETRY       10 00001 111110 00000 0 0000000000000
 
+NCP         10 ----- 110110 ----- --------- -----          # v8 CPop1
+NCP         10 ----- 110111 ----- --------- -----          # v8 CPop2
+
 ##
 ## Major Opcode 11 -- load and store instructions
 ##
@@ -299,8 +302,9 @@ CASA        11 ..... 111100 ..... . .............          @casa_imm
 CASXA       11 ..... 111110 ..... . .............          @r_r_r_asi
 CASXA       11 ..... 111110 ..... . .............          @casa_imm
 
-NCP         10 ----- 110110 ----- --------- -----          # v8 CPop1
-NCP         10 ----- 110111 ----- --------- -----          # v8 CPop2
+NOP_v9      11 ----- 101101 ----- 0 00000000 -----         # PREFETCH
+NOP_v9      11 ----- 101101 ----- 1 -------------          # PREFETCH
+NOP_v9      11 ----- 111101 ----- - -------------          # PREFETCHA
 
 NCP         11 ----- 110000 ----- --------- -----          # v8 LDC
 NCP         11 ----- 110001 ----- --------- -----          # v8 LDCSR
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index 2175c00ded..363d8b7fc8 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -4031,17 +4031,12 @@ static bool trans_NOP(DisasContext *dc, arg_NOP *a)
     return advance_pc(dc);
 }
 
-static bool trans_NOP_v7(DisasContext *dc, arg_NOP_v7 *a)
-{
-    /*
-     * TODO: Need a feature bit for sparcv8.
-     * In the meantime, treat all 32-bit cpus like sparcv7.
-     */
-    if (avail_32(dc)) {
-        return advance_pc(dc);
-    }
-    return false;
-}
+/*
+ * TODO: Need a feature bit for sparcv8.
+ * In the meantime, treat all 32-bit cpus like sparcv7.
+ */
+TRANS(NOP_v7, 32, trans_NOP, a)
+TRANS(NOP_v9, 64, trans_NOP, a)
 
 static bool do_arith_int(DisasContext *dc, arg_r_r_ri_cc *a, int cc_op,
                          void (*func)(TCGv, TCGv, TCGv),
@@ -5457,10 +5452,10 @@ static void disas_sparc_legacy(DisasContext *dc, unsigned int insn)
                 case 0x0b:      /* V9 ldx */
                 case 0x18:      /* V9 ldswa */
                 case 0x1b:      /* V9 ldxa */
+                case 0x2d:      /* V9 prefetch */
+                case 0x3d:      /* V9 prefetcha */
                     goto illegal_insn;  /* in decodetree */
 #ifdef TARGET_SPARC64
-                case 0x2d: /* V9 prefetch, no effect */
-                    goto skip_move;
                 case 0x30: /* V9 ldfa */
                     if (gen_trap_ifnofpu(dc)) {
                         goto jmp_insn;
@@ -5475,8 +5470,6 @@ static void disas_sparc_legacy(DisasContext *dc, unsigned int insn)
                     gen_ldf_asi(dc, cpu_addr, insn, 8, DFPREG(rd));
                     gen_update_fprs_dirty(dc, DFPREG(rd));
                     goto skip_move;
-                case 0x3d: /* V9 prefetcha, no effect */
-                    goto skip_move;
                 case 0x32: /* V9 ldqfa */
                     CHECK_FPU_FEATURE(dc, FLOAT128);
                     if (gen_trap_ifnofpu(dc)) {