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Add scheduling support for M{F,T}CR

This commit is contained in:
Michael Meissner 1995-11-18 01:39:04 +00:00
parent 54e986998a
commit 15ec5b60e2
1 changed files with 72 additions and 8 deletions
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80
sim/ppc/ppc-instructions
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@ -301,14 +301,14 @@ void::model-function::ppc_insn_int2:itable_index index, cpu *processor, model_da
}
busy_ptr = model_wait_for_unit(index, model_ptr, &model_ptr->timing[index]);
ppc_regs[ppc_RD].next = (model_reg *)0;
ppc_regs[ppc_RD].in_use = 1;
if (!Rc)
busy_ptr->reg = &ppc_regs[ppc_RD];
else {
model_reg *reg_CR0 = &ppc_regs[0 + PPC_CR_REG];
reg_CR0->next = &ppc_regs[ppc_RD];
busy_ptr->reg = reg_CR0;
ppc_regs[ppc_RD].next = (model_reg *)0;
ppc_regs[ppc_RD].in_use = 1;
if (!Rc)
busy_ptr->reg = &ppc_regs[ppc_RD];
else {
model_reg *reg_CR0 = &ppc_regs[0 + PPC_CR_REG];
reg_CR0->next = &ppc_regs[ppc_RD];
busy_ptr->reg = reg_CR0;
}
}
@ -584,6 +584,68 @@ void::model-function::ppc_insn_to_spr:itable_index index, cpu *processor, model_
busy_ptr->reg = &ppc_regs[ppc_SPR];
}
# Schedule a MFCR instruction that moves the CR into an integer regsiter
void::model-function::ppc_insn_mfcr:itable_index index, cpu *processor, model_data *model_ptr, signed_word *rD
if (!WITH_MODEL_ISSUE)
return;
else {
registers *cpu_regs = cpu_registers(processor);
const unsigned ppc_RD = (rD - &cpu_regs->gpr[0]) + PPC_INT_REG;
model_reg *ppc_regs = model_ptr->registers;
model_busy *busy_ptr;
while (ppc_regs[0 + PPC_CR_REG].in_use
| ppc_regs[1 + PPC_CR_REG].in_use
| ppc_regs[2 + PPC_CR_REG].in_use
| ppc_regs[3 + PPC_CR_REG].in_use
| ppc_regs[4 + PPC_CR_REG].in_use
| ppc_regs[5 + PPC_CR_REG].in_use
| ppc_regs[6 + PPC_CR_REG].in_use
| ppc_regs[7 + PPC_CR_REG].in_use) {
model_ptr->nr_stalls_data++;
model_new_cycle(model_ptr);
}
busy_ptr = model_wait_for_unit(index, model_ptr, &model_ptr->timing[index]);
ppc_regs[ppc_RD].next = (model_reg *)0;
ppc_regs[ppc_RD].in_use = 1;
busy_ptr->reg = &ppc_regs[ppc_RD];
}
# Schedule a MTCR instruction that moves an integer register into the CR
void::model-function::ppc_insn_mtcr:itable_index index, cpu *processor, model_data *model_ptr, signed_word *rT
if (!WITH_MODEL_ISSUE)
return;
else {
registers *cpu_regs = cpu_registers(processor);
const unsigned ppc_RT = (rT - &cpu_regs->gpr[0]) + PPC_INT_REG;
model_reg *ppc_regs = model_ptr->registers;
model_busy *busy_ptr;
model_reg *prev_reg;
int i;
if (ppc_regs[ppc_RT].in_use) {
model_new_cycle(model_ptr); /* don't count first dependency as a stall */
while (ppc_regs[ppc_RT].in_use) {
model_ptr->nr_stalls_data++;
model_new_cycle(model_ptr);
}
}
busy_ptr = model_wait_for_unit(index, model_ptr, &model_ptr->timing[index]);
prev_reg = (model_reg *)0;
for (i = 0; i < 8; i++) {
ppc_regs[i + PPC_CR_REG].next = prev_reg;
ppc_regs[i + PPC_CR_REG].in_use = 1;
prev_reg = &ppc_regs[i + PPC_CR_REG];
}
busy_ptr->reg = prev_reg;
}
model_data *::model-function::model_create:cpu *processor
model_data *model_ptr = ZALLOC(model_data);
ASSERT(CURRENT_MODEL > 0 && CURRENT_MODEL < nr_models);
@ -2953,6 +3015,7 @@ void::function::invalid_arithemetic_operation:cpu *processor, unsigned_word cia,
}
CR = (MASKED(*rS, 32, 63) & mask) | (CR & ~mask);
}
ppc_insn_mtcr(my_index, processor, cpu_model(processor), rS);
0.31,6.BF,9./,11./,16./,21.512,31./:X:::Move to Condition Register from XER
@ -2962,6 +3025,7 @@ void::function::invalid_arithemetic_operation:cpu *processor, unsigned_word cia,
*603e:PPC_UNIT_SRU, PPC_UNIT_SRU, 1, 1, 0
*604: PPC_UNIT_MCIU, PPC_UNIT_MCIU, 3, 3, 0
*rT = (unsigned32)CR;
ppc_insn_mfcr(my_index, processor, cpu_model(processor), rT);
#
# I.4.6.2 Floating-Point Load Instructions