target/mips: Make check_cp0_enabled() return a boolean

To avoid callers to emit dead code if check_cp0_enabled()
raise an exception, let it return a boolean value, whether
CP0 is enabled or not.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210420193453.1913810-4-f4bug@amsat.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/target/mips/translate.h b/target/mips/translate.h
index 2b3c7a69ec..6144259034 100644
--- a/target/mips/translate.h
+++ b/target/mips/translate.h
@@ -120,7 +120,12 @@ void gen_reserved_instruction(DisasContext *ctx);
 
 void check_insn(DisasContext *ctx, uint64_t flags);
 void check_mips_64(DisasContext *ctx);
-void check_cp0_enabled(DisasContext *ctx);
+/**
+ * check_cp0_enabled:
+ * Return %true if CP0 is enabled, otherwise return %false
+ * and emit a 'coprocessor unusable' exception.
+ */
+bool check_cp0_enabled(DisasContext *ctx);
 void check_cp1_enabled(DisasContext *ctx);
 void check_cp1_64bitmode(DisasContext *ctx);
 void check_cp1_registers(DisasContext *ctx, int regs);