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Diffstat (limited to 'includes/rts/storage/Liveness.h')
| -rw-r--r-- | includes/rts/storage/Liveness.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/includes/rts/storage/Liveness.h b/includes/rts/storage/Liveness.h new file mode 100644 index 0000000000..66c82f3134 --- /dev/null +++ b/includes/rts/storage/Liveness.h @@ -0,0 +1,34 @@ +/* ----------------------------------------------------------------------------- + * + * (c) The University of Glasgow 2004 + * + * Building liveness masks for RET_DYN stack frames. + * A few macros that are used in both .cmm and .c sources. + * + * A liveness mask is constructed like so: + * + * R1_PTR & R2_PTR & R3_PTR + * + * -------------------------------------------------------------------------- */ + +#ifndef RTS_STORAGE_LIVENESS_H +#define RTS_STORAGE_LIVENESS_H + +#define NO_PTRS 0xff +#define R1_PTR (NO_PTRS ^ (1<<0)) +#define R2_PTR (NO_PTRS ^ (1<<1)) +#define R3_PTR (NO_PTRS ^ (1<<2)) +#define R4_PTR (NO_PTRS ^ (1<<3)) +#define R5_PTR (NO_PTRS ^ (1<<4)) +#define R6_PTR (NO_PTRS ^ (1<<5)) +#define R7_PTR (NO_PTRS ^ (1<<6)) +#define R8_PTR (NO_PTRS ^ (1<<7)) + +#define N_NONPTRS(n) ((n)<<16) +#define N_PTRS(n) ((n)<<24) + +#define RET_DYN_NONPTRS(l) ((l)>>16 & 0xff) +#define RET_DYN_PTRS(l) ((l)>>24 & 0xff) +#define RET_DYN_LIVENESS(l) ((l) & 0xffff) + +#endif /* RTS_STORAGE_LIVENESS_H */ |