tcg/mips/tcg-target.inc.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
OPC_SYNC_WMB, OPC_SYNC_MB, OPC_SYNC_ACQUIRE, OPC_SYNC_RELEASE and
OPC_SYNC_RMB have wrong encode. According to the mips manual,
their encode should be 'OPC_SYNC | 0x?? << 6' rather than
'OPC_SYNC | 0x?? << 5'. Wrong encode can lead illegal instruction
errors. These instructions often appear with multi-threaded
simulation.
Signed-off-by: lixinyu <precinct@mail.ustc.edu.cn>
---
tcg/mips/tcg-target.inc.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/tcg/mips/tcg-target.inc.c b/tcg/mips/tcg-target.inc.c
index 1da663ce84..4d32ebc1df 100644
--- a/tcg/mips/tcg-target.inc.c
+++ b/tcg/mips/tcg-target.inc.c
@@ -404,11 +404,11 @@ typedef enum {
/* MIPS r6 introduced names for weaker variants of SYNC. These are
backward compatible to previous architecture revisions. */
- OPC_SYNC_WMB = OPC_SYNC | 0x04 << 5,
- OPC_SYNC_MB = OPC_SYNC | 0x10 << 5,
- OPC_SYNC_ACQUIRE = OPC_SYNC | 0x11 << 5,
- OPC_SYNC_RELEASE = OPC_SYNC | 0x12 << 5,
- OPC_SYNC_RMB = OPC_SYNC | 0x13 << 5,
+ OPC_SYNC_WMB = OPC_SYNC | 0x04 << 6,
+ OPC_SYNC_MB = OPC_SYNC | 0x10 << 6,
+ OPC_SYNC_ACQUIRE = OPC_SYNC | 0x11 << 6,
+ OPC_SYNC_RELEASE = OPC_SYNC | 0x12 << 6,
+ OPC_SYNC_RMB = OPC_SYNC | 0x13 << 6,
/* Aliases for convenience. */
ALIAS_PADD = sizeof(void *) == 4 ? OPC_ADDU : OPC_DADDU,
--
2.20.1
On 4/11/20 5:46 AM, lixinyu wrote: > OPC_SYNC_WMB, OPC_SYNC_MB, OPC_SYNC_ACQUIRE, OPC_SYNC_RELEASE and > OPC_SYNC_RMB have wrong encode. According to the mips manual, > their encode should be 'OPC_SYNC | 0x?? << 6' rather than > 'OPC_SYNC | 0x?? << 5'. Wrong encode can lead illegal instruction > errors. These instructions often appear with multi-threaded > simulation. Good catch. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Queued to tcg-for-5.0. r~
20:08 Sub, 11.04.2020. Richard Henderson <richard.henderson@linaro.org> је написао/ла: > > On 4/11/20 5:46 AM, lixinyu wrote: > > OPC_SYNC_WMB, OPC_SYNC_MB, OPC_SYNC_ACQUIRE, OPC_SYNC_RELEASE and > > OPC_SYNC_RMB have wrong encode. According to the mips manual, > > their encode should be 'OPC_SYNC | 0x?? << 6' rather than > > 'OPC_SYNC | 0x?? << 5'. Wrong encode can lead illegal instruction > > errors. These instructions often appear with multi-threaded > > simulation. > > Good catch. > > Reviewed-by: Richard Henderson <richard.henderson@linaro.org> > > Queued to tcg-for-5.0. > Reviewed-by: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com> Thanks to Lixinyu, in the first place, for reporting the problem, and also thanks to Richard for reviewing and incorporating this patch into his queue for 5.0. I also think, as Richard does, that this should go into 5.0, even in this final stages. Happy Easter, or hapy and sunny weekend, whatever you choose. Aleksandar > > r~ >
On 4/11/20 2:46 PM, lixinyu wrote: > OPC_SYNC_WMB, OPC_SYNC_MB, OPC_SYNC_ACQUIRE, OPC_SYNC_RELEASE and > OPC_SYNC_RMB have wrong encode. According to the mips manual, > their encode should be 'OPC_SYNC | 0x?? << 6' rather than > 'OPC_SYNC | 0x?? << 5'. Wrong encode can lead illegal instruction > errors. These instructions often appear with multi-threaded > simulation. > Fixes: 6f0b99104a3 > Signed-off-by: lixinyu <precinct@mail.ustc.edu.cn> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> > --- > tcg/mips/tcg-target.inc.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/tcg/mips/tcg-target.inc.c b/tcg/mips/tcg-target.inc.c > index 1da663ce84..4d32ebc1df 100644 > --- a/tcg/mips/tcg-target.inc.c > +++ b/tcg/mips/tcg-target.inc.c > @@ -404,11 +404,11 @@ typedef enum { > > /* MIPS r6 introduced names for weaker variants of SYNC. These are > backward compatible to previous architecture revisions. */ > - OPC_SYNC_WMB = OPC_SYNC | 0x04 << 5, > - OPC_SYNC_MB = OPC_SYNC | 0x10 << 5, > - OPC_SYNC_ACQUIRE = OPC_SYNC | 0x11 << 5, > - OPC_SYNC_RELEASE = OPC_SYNC | 0x12 << 5, > - OPC_SYNC_RMB = OPC_SYNC | 0x13 << 5, > + OPC_SYNC_WMB = OPC_SYNC | 0x04 << 6, > + OPC_SYNC_MB = OPC_SYNC | 0x10 << 6, > + OPC_SYNC_ACQUIRE = OPC_SYNC | 0x11 << 6, > + OPC_SYNC_RELEASE = OPC_SYNC | 0x12 << 6, > + OPC_SYNC_RMB = OPC_SYNC | 0x13 << 6, > > /* Aliases for convenience. */ > ALIAS_PADD = sizeof(void *) == 4 ? OPC_ADDU : OPC_DADDU, >
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