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Fix subu immed - was incorrectly using unsigned.

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This commit is contained in:
Andrew Cagney 1997-05-29 07:25:20 +00:00
parent efe4f1cbf8
commit 4e95b94e1e
3 changed files with 10 additions and 1 deletions
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6
sim/tic80/ChangeLog
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@ -1,3 +1,9 @@
Thu May 29 12:09:13 1997 Andrew Cagney <cagney@b2.cygnus.com>
* alu.h (IMEM_IMMED): New macro, fetch 32bit immediate operand N.
* insns (subu i): Immediate is signed not unsigned.
Tue May 27 13:22:13 1997 Andrew Cagney <cagney@b1.cygnus.com>
* sim-calls.c (sim_read): Pass NULL cpu to sim_core_read_buffer.

3
sim/tic80/alu.h
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@ -41,6 +41,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#define IMEM(CIA) \
(sim_core_read_aligned_4(STATE_CPU (sd, 0), CIA, sim_core_execute_map, (CIA).ip))
#define IMEM_IMMED(CIA, N) \
(sim_core_read_aligned_4 (STATE_CPU (sd, 0), CIA, sim_core_execute_map, (CIA).ip + 4 * (N)))
#define MEM(SIGN, EA, NR_BYTES) \
((SIGN##_##NR_BYTES) sim_core_read_unaligned_##NR_BYTES (STATE_CPU (sd, 0), cia, \
sim_core_read_map, \

2
sim/tic80/insns
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@ -988,7 +988,7 @@ void::function::do_subu:unsigned32 *rDest, unsigned32 Source1, signed32 Source2
TRACE_ALU3 (MY_INDEX, result, Source1, Source2);
*rDest = result;
// NOTE - the book has 15.1 which conflicts with subu.
31.Dest,26.Source2,21.0b101101,15.1,14.UnsignedImmediate::::subu i
31.Dest,26.Source2,21.0b101101,15.1,14.SignedImmediate::::subu i
do_subu (_SD, rDest, vSource1, vSource2);
31.Dest,26.Source2,21.0b11101101,13.1,12.0,11./,4.Source1::::subu r
do_subu (_SD, rDest, vSource1, vSource2);