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target/i386: document and group DISAS_* constants 

Place DISAS_* constants that update cpu_eip first, and
the "jump" ones last.  Add comments explaining the differences
and usage.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-05-16 19:04:36 +02:00
parent abdcc5c8ef
commit 9594b59331
1 changed files with 22 additions and 3 deletions
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25
target/i386/tcg/translate.c
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@ -144,9 +144,28 @@ typedef struct DisasContext {
TCGOp *prev_insn_end;
} DisasContext;
#define DISAS_EOB_ONLY DISAS_TARGET_0
#define DISAS_EOB_NEXT DISAS_TARGET_1
#define DISAS_EOB_INHIBIT_IRQ DISAS_TARGET_2
/*
* Point EIP to next instruction before ending translation.
* For instructions that can change hflags.
*/
#define DISAS_EOB_NEXT DISAS_TARGET_0
/*
* Point EIP to next instruction and set HF_INHIBIT_IRQ if not
* already set. For instructions that activate interrupt shadow.
*/
#define DISAS_EOB_INHIBIT_IRQ DISAS_TARGET_1
/*
* Return to the main loop; EIP might have already been updated
* but even in that case do not use lookup_and_goto_ptr().
*/
#define DISAS_EOB_ONLY DISAS_TARGET_2
/*
* EIP has already been updated. For jumps that wish to use
* lookup_and_goto_ptr()
*/
#define DISAS_JUMP DISAS_TARGET_3
/* The environment in which user-only runs is constrained. */