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Added SetCarryOverflow functions. #4

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Added SetCarryOverflow functions. #4

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b004e7e
Added SetCarryOverlfow functions
jribarich Nov 3, 2019
9292bc1
Added setCarryOverflow
jribarich Nov 3, 2019
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8 changes: 8 additions & 0 deletions execute.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -250,14 +250,17 @@ void execute() {
break;
case ALU_SUBR:
rf.write(alu.instr.subr.rd, rf[alu.instr.subr.rn] - rf[alu.instr.subr.rm]);
setCarryOverflow(rf[alu.instr.subr.rn], rf[alu.instr.subr.rm], OF_SUB);
//needs stats and flags
break;
case ALU_ADD3I:
// needs stats and flags
rf.write(alu.instr.add3i.rd, rf[alu.instr.add3i.rn] + alu.instr.add3i.imm);
setCarryOverflow(rf[alu.instr.add3i.rn], rf[alu.instr.add3i.imm], OF_ADD);
break;
case ALU_SUB3I:
rf.write(alu.instr.sub3i.rd, rf[alu.instr.sub3i.rn] - alu.instr.sub3i.imm);
setCarryOverflow(rf[alu.instr.sub3i.rn], rf[alu.instr.sub3i.imm], OF_SUB);
break;
case ALU_MOV:
// needs stats and flags
Expand All @@ -269,10 +272,13 @@ void execute() {
case ALU_ADD8I:
// needs stats and flags
rf.write(alu.instr.add8i.rdn, rf[alu.instr.add8i.rdn] + alu.instr.add8i.imm);
setCarryOverflow(rf[alu.instr.add8i.rdn], rf[alu.instr.add8i.imm], OF_ADD);
break;
case ALU_SUB8I:
// needs stats and flags
rf.write(alu.instr.sub8i.rdn, rf[alu.instr.sub8i.rdn] - alu.instr.sub8i.imm);
setCarryOverflow(rf[alu.instr.sub8i.rdn],
rf[alu.instr.sub8i.imm], OF_SUB);
break;
default:
cout << "instruction not implemented" << endl;
Expand Down Expand Up @@ -372,10 +378,12 @@ void execute() {
switch(misc_ops) {
case MISC_PUSH:
// need to implement
dmem.write(SP_REG, SP - (misc.instr.sub.imm*4));

break;
case MISC_POP:
// need to implement
dmem.write(SP_REG, SP + (misc.instr.add.imm*4));
break;
case MISC_SUB:
// functionally complete, needs stats
Expand Down