diff --git a/target/mips/cpu.h b/target/mips/cpu.h
index e2f6844..597afa8 100644
--- a/target/mips/cpu.h
+++ b/target/mips/cpu.h
@@ -284,6 +284,14 @@ typedef struct mips_def_t mips_def_t;
 #define CP0_REG00__MVPCONF1        3
 #define CP0_REG00__VPCONTROL       4
 /* CP0 Register 01 */
+#define CP0_REG01__RANDOM          0
+#define CP0_REG01__VPECONTROL      1
+#define CP0_REG01__VPECONF0        2
+#define CP0_REG01__VPECONF1        3
+#define CP0_REG01__YQMASK          4
+#define CP0_REG01__VPESCHEDULE     5
+#define CP0_REG01__VPESCHEFBACK    6
+#define CP0_REG01__VPEOPT          7
 /* CP0 Register 02 */
 #define CP0_REG02__ENTRYLO0        0
 /* CP0 Register 03 */
diff --git a/target/mips/translate.c b/target/mips/translate.c
index 06a1646..e350545 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -6883,42 +6883,42 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
         break;
     case CP0_REGISTER_01:
         switch (sel) {
-        case 0:
+        case CP0_REG01__RANDOM:
             CP0_CHECK(!(ctx->insn_flags & ISA_MIPS32R6));
             gen_helper_mfc0_random(arg, cpu_env);
             register_name = "Random";
             break;
-        case 1:
+        case CP0_REG01__VPECONTROL:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEControl));
             register_name = "VPEControl";
             break;
-        case 2:
+        case CP0_REG01__VPECONF0:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEConf0));
             register_name = "VPEConf0";
             break;
-        case 3:
+        case CP0_REG01__VPECONF1:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEConf1));
             register_name = "VPEConf1";
             break;
-        case 4:
+        case CP0_REG01__YQMASK:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load64(arg, offsetof(CPUMIPSState, CP0_YQMask));
             register_name = "YQMask";
             break;
-        case 5:
+        case CP0_REG01__VPESCHEDULE:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load64(arg, offsetof(CPUMIPSState, CP0_VPESchedule));
             register_name = "VPESchedule";
             break;
-        case 6:
+        case CP0_REG01__VPESCHEFBACK:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load64(arg, offsetof(CPUMIPSState, CP0_VPEScheFBack));
             register_name = "VPEScheFBack";
             break;
-        case 7:
+        case CP0_REG01__VPEOPT:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEOpt));
             register_name = "VPEOpt";
@@ -7651,43 +7651,43 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
         break;
     case CP0_REGISTER_01:
         switch (sel) {
-        case 0:
+        case CP0_REG01__RANDOM:
             /* ignored */
             register_name = "Random";
             break;
-        case 1:
+        case CP0_REG01__VPECONTROL:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_helper_mtc0_vpecontrol(cpu_env, arg);
             register_name = "VPEControl";
             break;
-        case 2:
+        case CP0_REG01__VPECONF0:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_helper_mtc0_vpeconf0(cpu_env, arg);
             register_name = "VPEConf0";
             break;
-        case 3:
+        case CP0_REG01__VPECONF1:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_helper_mtc0_vpeconf1(cpu_env, arg);
             register_name = "VPEConf1";
             break;
-        case 4:
+        case CP0_REG01__YQMASK:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_helper_mtc0_yqmask(cpu_env, arg);
             register_name = "YQMask";
             break;
-        case 5:
+        case CP0_REG01__VPESCHEDULE:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             tcg_gen_st_tl(arg, cpu_env,
                           offsetof(CPUMIPSState, CP0_VPESchedule));
             register_name = "VPESchedule";
             break;
-        case 6:
+        case CP0_REG01__VPESCHEFBACK:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             tcg_gen_st_tl(arg, cpu_env,
                           offsetof(CPUMIPSState, CP0_VPEScheFBack));
             register_name = "VPEScheFBack";
             break;
-        case 7:
+        case CP0_REG01__VPEOPT:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_helper_mtc0_vpeopt(cpu_env, arg);
             register_name = "VPEOpt";
@@ -8403,42 +8403,42 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
         break;
     case CP0_REGISTER_01:
         switch (sel) {
-        case 0:
+        case CP0_REG01__RANDOM:
             CP0_CHECK(!(ctx->insn_flags & ISA_MIPS32R6));
             gen_helper_mfc0_random(arg, cpu_env);
             register_name = "Random";
             break;
-        case 1:
+        case CP0_REG01__VPECONTROL:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEControl));
             register_name = "VPEControl";
             break;
-        case 2:
+        case CP0_REG01__VPECONF0:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEConf0));
             register_name = "VPEConf0";
             break;
-        case 3:
+        case CP0_REG01__VPECONF1:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEConf1));
             register_name = "VPEConf1";
             break;
-        case 4:
+        case CP0_REG01__YQMASK:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_YQMask));
             register_name = "YQMask";
             break;
-        case 5:
+        case CP0_REG01__VPESCHEDULE:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_VPESchedule));
             register_name = "VPESchedule";
             break;
-        case 6:
+        case CP0_REG01__VPESCHEFBACK:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_VPEScheFBack));
             register_name = "VPEScheFBack";
             break;
-        case 7:
+        case CP0_REG01__VPEOPT:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEOpt));
             register_name = "VPEOpt";
@@ -9125,41 +9125,41 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
         break;
     case CP0_REGISTER_01:
         switch (sel) {
-        case 0:
+        case CP0_REG01__RANDOM:
             /* ignored */
             register_name = "Random";
             break;
-        case 1:
+        case CP0_REG01__VPECONTROL:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_helper_mtc0_vpecontrol(cpu_env, arg);
             register_name = "VPEControl";
             break;
-        case 2:
+        case CP0_REG01__VPECONF0:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_helper_mtc0_vpeconf0(cpu_env, arg);
             register_name = "VPEConf0";
             break;
-        case 3:
+        case CP0_REG01__VPECONF1:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_helper_mtc0_vpeconf1(cpu_env, arg);
             register_name = "VPEConf1";
             break;
-        case 4:
+        case CP0_REG01__YQMASK:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_helper_mtc0_yqmask(cpu_env, arg);
             register_name = "YQMask";
             break;
-        case 5:
+        case CP0_REG01__VPESCHEDULE:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             tcg_gen_st_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_VPESchedule));
             register_name = "VPESchedule";
             break;
-        case 6:
+        case CP0_REG01__VPESCHEFBACK:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             tcg_gen_st_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_VPEScheFBack));
             register_name = "VPEScheFBack";
             break;
-        case 7:
+        case CP0_REG01__VPEOPT:
             CP0_CHECK(ctx->insn_flags & ASE_MT);
             gen_helper_mtc0_vpeopt(cpu_env, arg);
             register_name = "VPEOpt";
