diff options
Diffstat (limited to 'target-sh4/cpu.h')
| -rw-r--r-- | target-sh4/cpu.h | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/target-sh4/cpu.h b/target-sh4/cpu.h index 7970130..f9ecbb2 100644 --- a/target-sh4/cpu.h +++ b/target-sh4/cpu.h @@ -46,16 +46,16 @@ #define FPSCR_SZ (1 << 20) #define FPSCR_PR (1 << 19) #define FPSCR_DN (1 << 18) - -#define DELAY_SLOT (1 << 0) /* Must be the same as SR_T. */ -/* This flag is set if the next insn is a delay slot for a conditional jump. - The dynamic value of the DELAY_SLOT determines whether the jup is taken. */ +#define DELAY_SLOT (1 << 0) #define DELAY_SLOT_CONDITIONAL (1 << 1) -/* Those are used in contexts only */ -#define BRANCH (1 << 2) -#define BRANCH_CONDITIONAL (1 << 3) -#define MODE_CHANGE (1 << 4) /* Potential MD|RB change */ -#define BRANCH_EXCEPTION (1 << 5) /* Branch after exception */ +#define DELAY_SLOT_TRUE (1 << 2) +#define DELAY_SLOT_CLEARME (1 << 3) +/* The dynamic value of the DELAY_SLOT_TRUE flag determines whether the jump + * after the delay slot should be taken or not. It is calculated from SR_T. + * + * It is unclear if it is permitted to modify the SR_T flag in a delay slot. + * The use of DELAY_SLOT_TRUE flag makes us accept such SR_T modification. + */ /* XXXXX The structure could be made more compact */ typedef struct tlb_t { |