target/mips: Introduce disas_mt_available()

Similarly to commit 17c2c320f3c ("Introduce ase_mt_available helper"),
introduce the disas_mt_available() one which takes a DisasContext
argument to determine whether Multi-Threading is available by
checking the MT bit of the CP0_Config3 register.

Remove the then unused ASE_MT definition.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241024195447.44600-1-philmd@linaro.org>

4 files changed, 75 insertions, 71 deletions

diff --git a/target/mips/cpu-defs.c.inc b/target/mips/cpu-defs.c.inc
index 09bd62d..922fc39 100644
--- a/target/mips/cpu-defs.c.inc
+++ b/target/mips/cpu-defs.c.inc
@@ -314,7 +314,7 @@ const mips_def_t mips_defs[] =
                     (0x3fe << CP0SRSC4_SRS14) | (0x3fe << CP0SRSC4_SRS13),
         .SEGBITS = 32,
         .PABITS = 32,
-        .insn_flags = CPU_MIPS32R2 | ASE_MIPS16 | ASE_DSP | ASE_MT,
+        .insn_flags = CPU_MIPS32R2 | ASE_MIPS16 | ASE_DSP,
         .mmu_type = MMU_TYPE_R4000,
     },
     {
@@ -543,7 +543,7 @@ const mips_def_t mips_defs[] =
         .SEGBITS = 32,
         .PABITS = 32,
         .insn_flags = CPU_MIPS32R6 | ISA_NANOMIPS32 |
-                      ASE_DSP | ASE_DSP_R2 | ASE_DSP_R3 | ASE_MT,
+                      ASE_DSP | ASE_DSP_R2 | ASE_DSP_R3,
         .mmu_type = MMU_TYPE_R4000,
     },
 #if defined(TARGET_MIPS64)
diff --git a/target/mips/mips-defs.h b/target/mips/mips-defs.h
index 6b5cd0d..9d4d292 100644
--- a/target/mips/mips-defs.h
+++ b/target/mips/mips-defs.h
@@ -30,7 +30,6 @@
 #define ASE_DSP           0x0000000008000000ULL
 #define ASE_DSP_R2        0x0000000010000000ULL
 #define ASE_DSP_R3        0x0000000020000000ULL
-#define ASE_MT            0x0000000040000000ULL
 #define ASE_SMARTMIPS     0x0000000080000000ULL
 #define ASE_MICROMIPS     0x0000000100000000ULL
 /*
diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c
index 9a3ae10..de70458 100644
--- a/target/mips/tcg/translate.c
+++ b/target/mips/tcg/translate.c
@@ -5112,17 +5112,17 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "Index";
             break;
         case CP0_REG00__MVPCONTROL:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_mvpcontrol(arg, tcg_env);
             register_name = "MVPControl";
             break;
         case CP0_REG00__MVPCONF0:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_mvpconf0(arg, tcg_env);
             register_name = "MVPConf0";
             break;
         case CP0_REG00__MVPCONF1:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_mvpconf1(arg, tcg_env);
             register_name = "MVPConf1";
             break;
@@ -5143,37 +5143,37 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "Random";
             break;
         case CP0_REG01__VPECONTROL:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEControl));
             register_name = "VPEControl";
             break;
         case CP0_REG01__VPECONF0:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEConf0));
             register_name = "VPEConf0";
             break;
         case CP0_REG01__VPECONF1:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEConf1));
             register_name = "VPEConf1";
             break;
         case CP0_REG01__YQMASK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load64(arg, offsetof(CPUMIPSState, CP0_YQMask));
             register_name = "YQMask";
             break;
         case CP0_REG01__VPESCHEDULE:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load64(arg, offsetof(CPUMIPSState, CP0_VPESchedule));
             register_name = "VPESchedule";
             break;
         case CP0_REG01__VPESCHEFBACK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load64(arg, offsetof(CPUMIPSState, CP0_VPEScheFBack));
             register_name = "VPEScheFBack";
             break;
         case CP0_REG01__VPEOPT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEOpt));
             register_name = "VPEOpt";
             break;
@@ -5200,37 +5200,37 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "EntryLo0";
             break;
         case CP0_REG02__TCSTATUS:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_tcstatus(arg, tcg_env);
             register_name = "TCStatus";
             break;
         case CP0_REG02__TCBIND:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_tcbind(arg, tcg_env);
             register_name = "TCBind";
             break;
         case CP0_REG02__TCRESTART:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_tcrestart(arg, tcg_env);
             register_name = "TCRestart";
             break;
         case CP0_REG02__TCHALT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_tchalt(arg, tcg_env);
             register_name = "TCHalt";
             break;
         case CP0_REG02__TCCONTEXT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_tccontext(arg, tcg_env);
             register_name = "TCContext";
             break;
         case CP0_REG02__TCSCHEDULE:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_tcschedule(arg, tcg_env);
             register_name = "TCSchedule";
             break;
         case CP0_REG02__TCSCHEFBACK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_tcschefback(arg, tcg_env);
             register_name = "TCScheFBack";
             break;
@@ -5869,17 +5869,17 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "Index";
             break;
         case CP0_REG00__MVPCONTROL:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_mvpcontrol(tcg_env, arg);
             register_name = "MVPControl";
             break;
         case CP0_REG00__MVPCONF0:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             /* ignored */
             register_name = "MVPConf0";
             break;
         case CP0_REG00__MVPCONF1:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             /* ignored */
             register_name = "MVPConf1";
             break;
@@ -5899,39 +5899,39 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "Random";
             break;
         case CP0_REG01__VPECONTROL:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_vpecontrol(tcg_env, arg);
             register_name = "VPEControl";
             break;
         case CP0_REG01__VPECONF0:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_vpeconf0(tcg_env, arg);
             register_name = "VPEConf0";
             break;
         case CP0_REG01__VPECONF1:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_vpeconf1(tcg_env, arg);
             register_name = "VPEConf1";
             break;
         case CP0_REG01__YQMASK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_yqmask(tcg_env, arg);
             register_name = "YQMask";
             break;
         case CP0_REG01__VPESCHEDULE:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             tcg_gen_st_tl(arg, tcg_env,
                           offsetof(CPUMIPSState, CP0_VPESchedule));
             register_name = "VPESchedule";
             break;
         case CP0_REG01__VPESCHEFBACK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             tcg_gen_st_tl(arg, tcg_env,
                           offsetof(CPUMIPSState, CP0_VPEScheFBack));
             register_name = "VPEScheFBack";
             break;
         case CP0_REG01__VPEOPT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_vpeopt(tcg_env, arg);
             register_name = "VPEOpt";
             break;
@@ -5946,37 +5946,37 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "EntryLo0";
             break;
         case CP0_REG02__TCSTATUS:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tcstatus(tcg_env, arg);
             register_name = "TCStatus";
             break;
         case CP0_REG02__TCBIND:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tcbind(tcg_env, arg);
             register_name = "TCBind";
             break;
         case CP0_REG02__TCRESTART:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tcrestart(tcg_env, arg);
             register_name = "TCRestart";
             break;
         case CP0_REG02__TCHALT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tchalt(tcg_env, arg);
             register_name = "TCHalt";
             break;
         case CP0_REG02__TCCONTEXT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tccontext(tcg_env, arg);
             register_name = "TCContext";
             break;
         case CP0_REG02__TCSCHEDULE:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tcschedule(tcg_env, arg);
             register_name = "TCSchedule";
             break;
         case CP0_REG02__TCSCHEFBACK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tcschefback(tcg_env, arg);
             register_name = "TCScheFBack";
             break;
@@ -6619,17 +6619,17 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "Index";
             break;
         case CP0_REG00__MVPCONTROL:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_mvpcontrol(arg, tcg_env);
             register_name = "MVPControl";
             break;
         case CP0_REG00__MVPCONF0:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_mvpconf0(arg, tcg_env);
             register_name = "MVPConf0";
             break;
         case CP0_REG00__MVPCONF1:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_mvpconf1(arg, tcg_env);
             register_name = "MVPConf1";
             break;
@@ -6650,40 +6650,40 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "Random";
             break;
         case CP0_REG01__VPECONTROL:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEControl));
             register_name = "VPEControl";
             break;
         case CP0_REG01__VPECONF0:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEConf0));
             register_name = "VPEConf0";
             break;
         case CP0_REG01__VPECONF1:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEConf1));
             register_name = "VPEConf1";
             break;
         case CP0_REG01__YQMASK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             tcg_gen_ld_tl(arg, tcg_env,
                           offsetof(CPUMIPSState, CP0_YQMask));
             register_name = "YQMask";
             break;
         case CP0_REG01__VPESCHEDULE:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             tcg_gen_ld_tl(arg, tcg_env,
                           offsetof(CPUMIPSState, CP0_VPESchedule));
             register_name = "VPESchedule";
             break;
         case CP0_REG01__VPESCHEFBACK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             tcg_gen_ld_tl(arg, tcg_env,
                           offsetof(CPUMIPSState, CP0_VPEScheFBack));
             register_name = "VPEScheFBack";
             break;
         case CP0_REG01__VPEOPT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_VPEOpt));
             register_name = "VPEOpt";
             break;
@@ -6699,37 +6699,37 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "EntryLo0";
             break;
         case CP0_REG02__TCSTATUS:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_tcstatus(arg, tcg_env);
             register_name = "TCStatus";
             break;
         case CP0_REG02__TCBIND:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mfc0_tcbind(arg, tcg_env);
             register_name = "TCBind";
             break;
         case CP0_REG02__TCRESTART:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_dmfc0_tcrestart(arg, tcg_env);
             register_name = "TCRestart";
             break;
         case CP0_REG02__TCHALT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_dmfc0_tchalt(arg, tcg_env);
             register_name = "TCHalt";
             break;
         case CP0_REG02__TCCONTEXT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_dmfc0_tccontext(arg, tcg_env);
             register_name = "TCContext";
             break;
         case CP0_REG02__TCSCHEDULE:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_dmfc0_tcschedule(arg, tcg_env);
             register_name = "TCSchedule";
             break;
         case CP0_REG02__TCSCHEFBACK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_dmfc0_tcschefback(arg, tcg_env);
             register_name = "TCScheFBack";
             break;
@@ -7336,17 +7336,17 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "Index";
             break;
         case CP0_REG00__MVPCONTROL:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_mvpcontrol(tcg_env, arg);
             register_name = "MVPControl";
             break;
         case CP0_REG00__MVPCONF0:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             /* ignored */
             register_name = "MVPConf0";
             break;
         case CP0_REG00__MVPCONF1:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             /* ignored */
             register_name = "MVPConf1";
             break;
@@ -7366,39 +7366,39 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "Random";
             break;
         case CP0_REG01__VPECONTROL:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_vpecontrol(tcg_env, arg);
             register_name = "VPEControl";
             break;
         case CP0_REG01__VPECONF0:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_vpeconf0(tcg_env, arg);
             register_name = "VPEConf0";
             break;
         case CP0_REG01__VPECONF1:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_vpeconf1(tcg_env, arg);
             register_name = "VPEConf1";
             break;
         case CP0_REG01__YQMASK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_yqmask(tcg_env, arg);
             register_name = "YQMask";
             break;
         case CP0_REG01__VPESCHEDULE:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             tcg_gen_st_tl(arg, tcg_env,
                           offsetof(CPUMIPSState, CP0_VPESchedule));
             register_name = "VPESchedule";
             break;
         case CP0_REG01__VPESCHEFBACK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             tcg_gen_st_tl(arg, tcg_env,
                           offsetof(CPUMIPSState, CP0_VPEScheFBack));
             register_name = "VPEScheFBack";
             break;
         case CP0_REG01__VPEOPT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_vpeopt(tcg_env, arg);
             register_name = "VPEOpt";
             break;
@@ -7413,37 +7413,37 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
             register_name = "EntryLo0";
             break;
         case CP0_REG02__TCSTATUS:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tcstatus(tcg_env, arg);
             register_name = "TCStatus";
             break;
         case CP0_REG02__TCBIND:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tcbind(tcg_env, arg);
             register_name = "TCBind";
             break;
         case CP0_REG02__TCRESTART:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tcrestart(tcg_env, arg);
             register_name = "TCRestart";
             break;
         case CP0_REG02__TCHALT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tchalt(tcg_env, arg);
             register_name = "TCHalt";
             break;
         case CP0_REG02__TCCONTEXT:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tccontext(tcg_env, arg);
             register_name = "TCContext";
             break;
         case CP0_REG02__TCSCHEDULE:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tcschedule(tcg_env, arg);
             register_name = "TCSchedule";
             break;
         case CP0_REG02__TCSCHEFBACK:
-            CP0_CHECK(ctx->insn_flags & ASE_MT);
+            CP0_CHECK(disas_mt_available(ctx));
             gen_helper_mtc0_tcschefback(tcg_env, arg);
             register_name = "TCScheFBack";
             break;
diff --git a/target/mips/tcg/translate.h b/target/mips/tcg/translate.h
index 23a489c..1bf153d 100644
--- a/target/mips/tcg/translate.h
+++ b/target/mips/tcg/translate.h
@@ -231,6 +231,11 @@ bool decode_ext_octeon(DisasContext *ctx, uint32_t insn);
 #endif
 bool decode_ext_vr54xx(DisasContext *ctx, uint32_t insn);
 
+static inline bool disas_mt_available(DisasContext *ctx)
+{
+    return ctx->CP0_Config3 & (1 << CP0C3_MT);
+}
+
 /*
  * Helpers for implementing sets of trans_* functions.
  * Defer the implementation of NAME to FUNC, with optional extra arguments.