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/* -----------------------------------------------------------------------------
*
* (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 LIVENESS_H
#define 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 /* LIVENESS_H */
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