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author | David Edelsohn <dje.gcc@gmail.com> | 1997-05-01 17:45:25 +0000 |
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committer | David Edelsohn <dje.gcc@gmail.com> | 1997-05-01 17:45:25 +0000 |
commit | 2c8f0de695ce97cd6c09eca707e1a216c8b69943 (patch) | |
tree | d1f26648ab4545e72724ce2461c4f9186990a9b2 | |
parent | 9f4b686cb5b5377bc70b9b0b2392bef7d7628301 (diff) | |
download | gdb-2c8f0de695ce97cd6c09eca707e1a216c8b69943.zip gdb-2c8f0de695ce97cd6c09eca707e1a216c8b69943.tar.gz gdb-2c8f0de695ce97cd6c09eca707e1a216c8b69943.tar.bz2 |
(EXTRACT_SIGNED,EXTRACT_UNSIGNED,HOST_LONGS_FOR_BITS): Move from
cgen-types.h to cgen-sim.h.
-rw-r--r-- | sim/common/cgen-sim.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sim/common/cgen-sim.h b/sim/common/cgen-sim.h index 4cfc7d2..7df7d3f 100644 --- a/sim/common/cgen-sim.h +++ b/sim/common/cgen-sim.h @@ -42,6 +42,20 @@ enum sim_signal_type { void engine_halt PARAMS ((struct _sim_cpu *, enum exec_state, int)); void engine_signal PARAMS ((struct _sim_cpu *, enum sim_signal_type)); +/* Instruction field support macros. */ + +#define EXTRACT_SIGNED(val, total, start, length) \ +(((((val) >> ((total) - ((start) + (length)))) & ((1 << (length)) - 1)) \ + ^ (1 << ((length) - 1))) \ + - (1 << ((length) - 1))) + +#define EXTRACT_UNSIGNED(val, total, start, length) \ +(((val) >> ((total) - ((start) + (length)))) & ((1 << (length)) - 1)) + +/* Compute number of longs required to hold N bits. */ +#define HOST_LONGS_FOR_BITS(n) \ + (((n) + sizeof (long) * 8 - 1) / sizeof (long) * 8) + /* Decode,extract,semantics. */ typedef void (EXTRACT_FN) PARAMS ((SIM_CPU *, PCADDR, insn_t, struct argbuf *)); |