' asm_rdtsc.pb — RDTSC (Read Time-Stamp Counter) simulation
#COMPILE EXE
#DIM ALL

FUNCTION PBMAIN() AS LONG
    LOCAL cycleCounts(50) AS LONG
    LOCAL numSamples AS LONG
    LOCAL i AS LONG
    LOCAL j AS LONG
    LOCAL totalCycles AS LONG
    LOCAL minCycles AS LONG
    LOCAL maxCycles AS LONG
    LOCAL avgCycles AS LONG
    LOCAL baseValue AS LONG
    LOCAL overhead AS LONG
    LOCAL iter AS LONG
    LOCAL sampleValue AS LONG
    LOCAL variance AS LONG
    LOCAL stability AS LONG
    LOCAL result AS LONG

    numSamples = 20
    baseValue = 1000

    PRINT "=== RDTSC Cycle Counter Simulation ==="
    PRINT "Simulating " + STR$(numSamples) + " rdtsc samples"

    FOR i = 0 TO numSamples - 1
        sampleValue = baseValue + i * 10 + i MOD 7
        cycleCounts(i) = sampleValue
    NEXT i

    totalCycles = 0
    minCycles = cycleCounts(0)
    maxCycles = cycleCounts(0)
    FOR i = 0 TO numSamples - 1
        sampleValue = cycleCounts(i)
        totalCycles = totalCycles + sampleValue
        IF sampleValue < minCycles THEN minCycles = sampleValue
        IF sampleValue > maxCycles THEN maxCycles = sampleValue
    NEXT i
    avgCycles = totalCycles / numSamples

    PRINT "Timing results (cycles):"
    PRINT "  Min: " + STR$(minCycles)
    PRINT "  Max: " + STR$(maxCycles)
    PRINT "  Avg: " + STR$(avgCycles)
    PRINT "  Total: " + STR$(totalCycles)

    FOR i = 0 TO numSamples - 1
        sampleValue = cycleCounts(i)
        variance = sampleValue - avgCycles
        IF variance < 0 THEN variance = 0 - variance
        IF variance < 5 THEN stability = stability + 1
    NEXT i

    PRINT "Stable samples (within 5 cycles): " + STR$(stability) + " / " + STR$(numSamples)
    PRINT "=== End RDTSC ==="
    FUNCTION = 0
END FUNCTION
