From cb539fd241900f51de7d21244f7a55422ad0d40a Mon Sep 17 00:00:00 2001 From: James Hogan Date: Mon, 31 Jul 2017 14:36:45 +0100 Subject: target-mips: Don't stop on [d]mtc0 DESAVE/KScratch Writing to the MIPS DESAVE register (and now the KScratch registers) will stop translation, supposedly due to risk of execution mode switches. However these registers are basically RW scratch registers with no side effects so there is no risk of them triggering execution mode changes. Drop the bstate = BS_STOP for these registers for both mtc0 and dmtc0. Fixes: 7a387fffce50 ("Add MIPS32R2 instructions, and generally straighten out the instruction decoding. This is also the first percent towards MIPS64 support.") Signed-off-by: James Hogan Cc: Aurelien Jarno Cc: Yongbok Kim Reviewed-by: Yongbok Kim Signed-off-by: Yongbok Kim --- target/mips/translate.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'target/mips') diff --git a/target/mips/translate.c b/target/mips/translate.c index 51626aead3..0bca700fb3 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -6386,8 +6386,6 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel) default: goto cp0_unimplemented; } - /* Stop translation as we may have switched the execution mode */ - ctx->bstate = BS_STOP; break; default: goto cp0_unimplemented; @@ -7714,8 +7712,6 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel) default: goto cp0_unimplemented; } - /* Stop translation as we may have switched the execution mode */ - ctx->bstate = BS_STOP; break; default: goto cp0_unimplemented; -- cgit v1.2.3