To allow compiling 64-bit specific translation code more
generically (and removing #ifdef'ry), allow compiling
check_mips_64() on 32-bit targets.
If ever called on 32-bit, we obviously emit a reserved
instruction exception.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <20201215225757.764263-3-f4bug@amsat.org>
---
 target/mips/translate.h | 2 --
 target/mips/translate.c | 8 +++-----
 2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/target/mips/translate.h b/target/mips/translate.h
index 1b918a439b1..60e59675ef1 100644
--- a/target/mips/translate.h
+++ b/target/mips/translate.h
@@ -129,9 +129,7 @@ void generate_exception_end(DisasContext *ctx, int excp);
 void gen_reserved_instruction(DisasContext *ctx);
 
 void check_insn(DisasContext *ctx, uint64_t flags);
-#ifdef TARGET_MIPS64
 void check_mips_64(DisasContext *ctx);
-#endif
 void check_cp0_enabled(DisasContext *ctx);
 void check_cp1_enabled(DisasContext *ctx);
 void check_cp1_64bitmode(DisasContext *ctx);
diff --git a/target/mips/translate.c b/target/mips/translate.c
index d4d5d294f34..7e8afb363ac 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -2971,18 +2971,16 @@ static inline void check_ps(DisasContext *ctx)
     check_cp1_64bitmode(ctx);
 }
 
-#ifdef TARGET_MIPS64
 /*
- * This code generates a "reserved instruction" exception if 64-bit
- * instructions are not enabled.
+ * This code generates a "reserved instruction" exception if cpu is not
+ * 64-bit or 64-bit instructions are not enabled.
  */
 void check_mips_64(DisasContext *ctx)
 {
-    if (unlikely(!(ctx->hflags & MIPS_HFLAG_64))) {
+    if (unlikely((TARGET_LONG_BITS != 64) || !(ctx->hflags & MIPS_HFLAG_64))) {
         gen_reserved_instruction(ctx);
     }
 }
-#endif
 
 #ifndef CONFIG_USER_ONLY
 static inline void check_mvh(DisasContext *ctx)
-- 
2.26.2