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Fix a possible out-of-bounds access in superscalar generator

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This commit is contained in:
tevador 2019-10-11 11:31:05 +02:00
parent 4296c35d79
commit be810aca0a
1 changed files with 7 additions and 1 deletions
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8
src/superscalar.cpp
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@ -637,7 +637,7 @@ namespace randomx {
int cycle1 = scheduleUop<false>(mop.getUop1(), portBusy, cycle);
int cycle2 = scheduleUop<false>(mop.getUop2(), portBusy, cycle);
if (cycle1 == cycle2) {
if (cycle1 >= 0 && cycle1 == cycle2) {
if (commit) {
scheduleUop<true>(mop.getUop1(), portBusy, cycle1);
scheduleUop<true>(mop.getUop2(), portBusy, cycle2);
@ -761,6 +761,12 @@ namespace randomx {
//recalculate when the instruction can be scheduled for execution based on operand availability
scheduleCycle = scheduleMop<true>(mop, portBusy, scheduleCycle, scheduleCycle);
if (scheduleCycle < 0) {
if (trace) std::cout << "Unable to map operation '" << mop.getName() << "' to execution port (cycle " << scheduleCycle << ")" << std::endl;
portsSaturated = true;
break;
}
//calculate when the result will be ready
depCycle = scheduleCycle + mop.getLatency();