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| author | Nick Clifton <nickc@redhat.com> | 2000-08-15 00:10:52 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2000-08-15 00:10:52 +0000 |
| commit | 4bc1de7b2d5e2003fd54d4e7443b44d424cefe96 (patch) | |
| tree | 8d8d0ce9074e6ac0c6b406004a5634959577efc6 /sim/arm/armemu.c | |
| parent | 046b3b54ee25c1e6d3af4fc24d70778d413a2877 (diff) | |
| download | gdb-4bc1de7b2d5e2003fd54d4e7443b44d424cefe96.zip gdb-4bc1de7b2d5e2003fd54d4e7443b44d424cefe96.tar.gz gdb-4bc1de7b2d5e2003fd54d4e7443b44d424cefe96.tar.bz2 | |
Compute write back value for post increment loads before
performing the load in case the offset register is overwritten.
Diffstat (limited to 'sim/arm/armemu.c')
| -rw-r--r-- | sim/arm/armemu.c | 75 |
1 files changed, 41 insertions, 34 deletions
diff --git a/sim/arm/armemu.c b/sim/arm/armemu.c index 7152023..9d3dcba 100644 --- a/sim/arm/armemu.c +++ b/sim/arm/armemu.c @@ -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() \ { \ |