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Mark some exceptions (mainly v86 related) as 'expected', meaning they

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won't cause a code block deletion. This speeds up some v86 code due
to a reduction in code block churning.
This commit is contained in:
SarahW 2020-09-09 21:49:28 +01:00
commit cccaf86fd3
7 changed files with 39 additions and 13 deletions
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11
src/x86.h
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@ -261,6 +261,16 @@ enum
ABRT_PF = 0xE
};
#define ABRT_MASK 0x7f
/*An 'expected' exception is one that would be expected to occur on every execution
of this code path; eg a GPF due to being in v86 mode. An 'unexpected' exception is
one that would be unlikely to occur on the next exception, eg a page fault may be
fixed up by the exception handler and the next execution would not hit it.
This distinction is used by the dynarec; a block that hits an 'expected' exception
would be compiled, a block that hits an 'unexpected' exception would be rejected so
that we don't end up with an unnecessarily short block*/
#define ABRT_EXPECTED 0x80
extern uint32_t abrt_error;
void x86_doabrt(int x86_abrt);
@ -275,6 +285,7 @@ void x86illegal();
void x86seg_reset();
void x86gpf(char *s, uint16_t error);
void x86gpf_expected(char *s, uint16_t error);
void resetx86();
void softresetx86();