diff options
Diffstat (limited to 'sim/ppc/ppc-instructions')
| -rw-r--r-- | sim/ppc/ppc-instructions | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/sim/ppc/ppc-instructions b/sim/ppc/ppc-instructions index 6ebe081..cfbac64 100644 --- a/sim/ppc/ppc-instructions +++ b/sim/ppc/ppc-instructions @@ -1440,7 +1440,7 @@ void::function::invalid_zero_divide_operation:cpu *processor, unsigned_word cia, *603: PPC_UNIT_BPU, PPC_UNIT_BPU, 1, 1, 0 *603e:PPC_UNIT_BPU, PPC_UNIT_BPU, 1, 1, 0 *604: PPC_UNIT_BPU, PPC_UNIT_BPU, 1, 1, 0 - /* WITH_OPTION_MPC860C0 + /* option_mpc860c0: No problem here because this branch is predicted taken (unconditional). */ if (AA) NIA = IEA(EXTS(LI_0b00)); else NIA = IEA(CIA + EXTS(LI_0b00)); @@ -1469,9 +1469,8 @@ void::function::invalid_zero_divide_operation:cpu *processor, unsigned_word cia, else succeed = 0; if (LK) LR = (spreg)IEA(CIA + 4); - #ifdef WITH_OPTION_MPC860C0 - if (option_mpc860c0 && (BO{0} && BO{2} || !BO{4})) { - /* This branch is predicted as not-taken. + if (option_mpc860c0 && (!BO{0} || !BO{2}) && !BO{4}) { + /* This branch is predicted as "normal". If this is a forward branch and it is near the end of a page, we've detected a problematic branch. */ if (succeed && NIA > CIA) { @@ -1479,7 +1478,6 @@ void::function::invalid_zero_divide_operation:cpu *processor, unsigned_word cia, program_interrupt(processor, cia, mpc860c0_instruction_program_interrupt); } } - #endif // WITH_OPTION_MPC860C0 if (CURRENT_MODEL_ISSUE > 0) model_branches(cpu_model(processor), succeed, BO); if (! BO{0}) { @@ -1513,8 +1511,7 @@ void::function::invalid_zero_divide_operation:cpu *processor, unsigned_word cia, else succeed = 0; if (LK) LR = (spreg)IEA(CIA + 4); - #ifdef WITH_OPTION_MPC860C0 - if (option_mpc860c0 && (BO{0} && BO{2} || !BO{4})) { + if (option_mpc860c0 && (!BO{0} || !BO{2}) && !BO{4}) { /* This branch is predicted as not-taken. If this is a forward branch and it is near the end of a page, we've detected a problematic branch. */ @@ -1523,7 +1520,6 @@ void::function::invalid_zero_divide_operation:cpu *processor, unsigned_word cia, program_interrupt(processor, cia, mpc860c0_instruction_program_interrupt); } } - #endif // WITH_OPTION_MPC860C0 if (CURRENT_MODEL_ISSUE > 0) { model_branches(cpu_model(processor), succeed, BO); if (! BO{0}) @@ -1546,8 +1542,7 @@ void::function::invalid_zero_divide_operation:cpu *processor, unsigned_word cia, else succeed = 0; if (LK) LR = (spreg)IEA(CIA + 4); - #ifdef WITH_OPTION_MPC860C0 - if (option_mpc860c0 && (BO{0} && BO{2} || !BO{4})) { + if (option_mpc860c0 && (!BO{0} || !BO{2}) && !BO{4}) { /* This branch is predicted as not-taken. If this is a forward branch and it is near the end of a page, we've detected a problematic branch. */ @@ -1556,7 +1551,6 @@ void::function::invalid_zero_divide_operation:cpu *processor, unsigned_word cia, program_interrupt(processor, cia, mpc860c0_instruction_program_interrupt); } } - #endif // WITH_OPTION_MPC860C0 if (CURRENT_MODEL_ISSUE > 0) { model_branches(cpu_model(processor), succeed, BO); if (! BO{0}) |