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Compute write back value for post increment loads before

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performing the load in case the offset register is overwritten.
This commit is contained in:
Nick Clifton
2000-08-15 00:10:52 +00:00
parent 046b3b54ee
commit 4bc1de7b2d
2 changed files with 47 additions and 34 deletions
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6
sim/arm/ChangeLog
View File

@ -1,3 +1,9 @@
2000-08-14 Nick Clifton <nickc@redhat.com>
* armemu.c (LHPOSTDOWN): Compute write back value before
performing load in case the offset register is overwritten.
(LHPOSTUP): Ditto.
2000-07-14 Fernando Nasser <fnasser@cygnus.com>
* wrapper.c (sim_create_inferior): Fix typo in the previous patch.

75
sim/arm/armemu.c
View File

@ -106,60 +106,67 @@ extern int stop_simulator;
if (StoreHalfWord(state, instr, temp)) \
LSBase = temp ;
/* load post decrement writeback */
/* Load post decrement writeback. */
#define LHPOSTDOWN() \
{ \
int done = 1 ; \
lhs = LHS ; \
switch (BITS(5,6)) { \
int done = 1; \
lhs = LHS; \
temp = lhs - GetLS7RHS (state, instr); \
\
switch (BITS (5, 6)) \
{ \
case 1: /* H */ \
if (LoadHalfWord(state,instr,lhs,LUNSIGNED)) \
LSBase = lhs - GetLS7RHS(state,instr) ; \
break ; \
if (LoadHalfWord (state, instr, lhs, LUNSIGNED)) \
LSBase = temp; \
break; \
case 2: /* SB */ \
if (LoadByte(state,instr,lhs,LSIGNED)) \
LSBase = lhs - GetLS7RHS(state,instr) ; \
break ; \
if (LoadByte (state, instr, lhs, LSIGNED)) \
LSBase = temp; \
break; \
case 3: /* SH */ \
if (LoadHalfWord(state,instr,lhs,LSIGNED)) \
LSBase = lhs - GetLS7RHS(state,instr) ; \
break ; \
case 0: /* SWP handled elsewhere */ \
if (LoadHalfWord (state, instr, lhs, LSIGNED)) \
LSBase = temp; \
break; \
case 0: /* SWP handled elsewhere. */ \
default: \
done = 0 ; \
break ; \
done = 0; \
break; \
} \
if (done) \
break ; \
break; \
}
/* load post increment writeback */
/* Load post increment writeback. */
#define LHPOSTUP() \
{ \
int done = 1 ; \
lhs = LHS ; \
switch (BITS(5,6)) { \
int done = 1; \
lhs = LHS; \
temp = lhs + GetLS7RHS (state, instr); \
\
switch (BITS (5, 6)) \
{ \
case 1: /* H */ \
if (LoadHalfWord(state,instr,lhs,LUNSIGNED)) \
LSBase = lhs + GetLS7RHS(state,instr) ; \
break ; \
if (LoadHalfWord (state, instr, lhs, LUNSIGNED)) \
LSBase = temp; \
break; \
case 2: /* SB */ \
if (LoadByte(state,instr,lhs,LSIGNED)) \
LSBase = lhs + GetLS7RHS(state,instr) ; \
break ; \
if (LoadByte (state, instr, lhs, LSIGNED)) \
LSBase = temp; \
break; \
case 3: /* SH */ \
if (LoadHalfWord(state,instr,lhs,LSIGNED)) \
LSBase = lhs + GetLS7RHS(state,instr) ; \
break ; \
case 0: /* SWP handled elsewhere */ \
if (LoadHalfWord (state, instr, lhs, LSIGNED)) \
LSBase = temp; \
break; \
case 0: /* SWP handled elsewhere. */ \
default: \
done = 0 ; \
break ; \
done = 0; \
break; \
} \
if (done) \
break ; \
break; \
}
/* load pre decrement */
#define LHPREDOWN() \
{ \