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determining array base offset: replaced trick code with proper code

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This commit is contained in:
minjaesong
2020-02-27 17:54:35 +09:00
parent e235b81041
commit 1524919ae0
5 changed files with 25 additions and 34 deletions
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2
src/net/torvald/terrarum/modulecomputers/virtualcomputer/computer/BLIT.kt
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@@ -35,7 +35,7 @@ class BLIT {
val writeAddr = toAddr(x, y)
UnsafeHelper.memcpyRaw(
bytes, (if (AppLoader.is32BitJVM) 8 else 16) + yy * width,
bytes, UnsafeHelper.getArrayOffset(bytes) + yy * width,
null, framebuffer.ptr + writeAddr,
width.toLong()
)

4
src/net/torvald/terrarum/tests/RNGTest.kt
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@@ -39,6 +39,8 @@ fun main(args: Array<String>) {
val rangeSize = 64
val textLen = (rangeSize - 1).toString().length
for (tries in 0 until 16) {
repeat(BlockCodex.DYNAMIC_RANDOM_CASES + 12) { repeats ->
val x = 349 + repeats
@@ -48,7 +50,7 @@ fun main(args: Array<String>) {
val offset = XXHash32.hash(((x and 0xFFFF).shl(16) or (y and 0xFFFF)).toLittle(), 10000)
//print("${offset.toString().padStart(2, '0')} ")
print("${offset.fmod(BlockCodex.DYNAMIC_RANDOM_CASES).toString().padStart(2, '0')} ")
print("${offset.fmod(rangeSize).toString().padStart(textLen, '0')} ")
}
println()
println()

25
src/net/torvald/terrarum/tests/UnsafeTest.kt
View File

@@ -19,30 +19,11 @@ class UnsafeTest {
private val memsize = 512L // must be big enough value so that your OS won't always return zero-filled pieces
fun main() {
var ptr = unsafe.allocateMemory(memsize)
printDump(ptr)
val intarray = intArrayOf(5,4,3,2,1)
unsafe.setMemory(ptr, memsize, 0x00.toByte())
printDump(ptr)
val arrayBaseOffset = UnsafeHelper.getArrayOffset(intarray) // should be 16 or 12 on 64-bit JVM
for (k in 0 until 13) {
unsafe.putByte(ptr + k, (-1 - k).toByte())
}
printDump(ptr)
// test shingled memory copy -- how would it work out?
UnsafeHelper.memcpy(ptr, ptr + 3L, 13L)
printDump(ptr)
println(ptr)
ptr = unsafe.reallocateMemory(ptr, 256L)
println(ptr)
// that's all for today!
unsafe.freeMemory(ptr)
println(arrayBaseOffset)
}