diff options
Diffstat (limited to 'target-m68k/cpu.h')
| -rw-r--r-- | target-m68k/cpu.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/target-m68k/cpu.h b/target-m68k/cpu.h index c2d40cb1cc..471f490dc1 100644 --- a/target-m68k/cpu.h +++ b/target-m68k/cpu.h @@ -154,6 +154,14 @@ int cpu_m68k_signal_handler(int host_signum, void *pinfo, void *puc); void cpu_m68k_flush_flags(CPUM68KState *, int); + +/* Instead of computing the condition codes after each m68k instruction, + * QEMU just stores one operand (called CC_SRC), the result + * (called CC_DEST) and the type of operation (called CC_OP). When the + * condition codes are needed, the condition codes can be calculated + * using this information. Condition codes are not generated if they + * are only needed for conditional branches. + */ enum { CC_OP_DYNAMIC, /* Use env->cc_op */ CC_OP_FLAGS, /* CC_DEST = CVZN, CC_SRC = unused */ |