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target/mips: Drop redundant gen_io_start/stop() 

DMTC0 CP0_Cause does a redundant gen_io_start() and gen_io_end() pair,
even though this is done for all DMTC0 operations outside of the switch
statement. Remove these redundant calls.

Fixes: 5dc5d9f055 ("mips: more fixes to the MIPS interrupt glue logic")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Yongbok Kim <yongbok.kim@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com>
master
James Hogan 2017-08-02 10:59:16 +01:00 committed by Yongbok Kim
parent b74cddcbf6
commit 51ca717b07
1 changed files with 0 additions and 8 deletions
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8
target/mips/translate.c
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@ -7401,15 +7401,7 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
switch (sel) {
case 0:
save_cpu_state(ctx, 1);
/* Mark as an IO operation because we may trigger a software
interrupt. */
if (ctx->tb->cflags & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_mtc0_cause(cpu_env, arg);
if (ctx->tb->cflags & CF_USE_ICOUNT) {
gen_io_end();
}
/* Stop translation as we may have triggered an intetrupt. BS_STOP
* isn't sufficient, we need to ensure we break out of translated
* code to check for pending interrupts. */