operationHelpers.scala 26.4 KB
Newer Older
Kunshan Wang's avatar
Kunshan Wang committed
1 2
package uvm.refimpl.itpr

3 4
import java.nio.charset.Charset

5 6
import uvm.Function
import uvm.ir.irbuilder.IRBuilder
Kunshan Wang's avatar
Kunshan Wang committed
7
import uvm.refimpl._
8
import uvm.refimpl.integerize._
9
import uvm.refimpl.mem.MemorySupport
10 11 12 13 14
import uvm.refimpl.mem.Mutator
import uvm.refimpl.mem.TypeSizes._
import uvm.ssavariables._
import uvm.ssavariables.AtomicRMWOptr._
import uvm.types._
Kunshan Wang's avatar
Kunshan Wang committed
15
import uvm.refimpl.nat.NativeMemoryAccessHelper
Kunshan Wang's avatar
Kunshan Wang committed
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

object OpHelper {

  val ONE = BigInt(1)

  def mask(n: Int): BigInt = {
    (ONE << n) - ONE
  }

  def truncFromBigInt(n: BigInt, len: Int): BigInt = n & mask(len)

  def zextToBigInt(n: BigInt, len: Int): BigInt = n & mask(len)

  def sextToBigInt(n: BigInt, len: Int): BigInt = {
    val bit = n.testBit(len - 1)
    if (bit) {
      n | (~mask(len - 1))
    } else {
      n & (mask(len - 1))
    }
  }

38 39 40 41 42
  // The BigInt in a BoxInt is always truncated to len bits.
  //
  // "prepare" means sign- or zero-extend the content to get the real math value.
  // "unprepare" means truncating a math value to len bits to be stored in a BoxInt.

Kunshan Wang's avatar
Kunshan Wang committed
43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
  def prepareUnsigned(n: BigInt, len: Int): BigInt = truncFromBigInt(n, len)

  def prepareSigned(n: BigInt, len: Int): BigInt = {
    sextToBigInt(truncFromBigInt(n, len), len)
  }

  def unprepare(n: BigInt, len: Int): BigInt = truncFromBigInt(n, len)

  def trunc(n: BigInt, toLen: Int): BigInt = truncFromBigInt(n, toLen)

  def zext(n: BigInt, fromLen: Int, toLen: Int): BigInt = truncFromBigInt(n, fromLen)

  def sext(n: BigInt, fromLen: Int, toLen: Int): BigInt = {
    truncFromBigInt(sextToBigInt(n, fromLen), toLen)
  }

  def maxSInt(l: Int): BigInt = (BigInt(1) << (l - 1)) - 1
  def minSIntAbs(l: Int): BigInt = BigInt(1) << (l - 1)
  def maxUInt(l: Int): BigInt = (BigInt(1) << l) - 1

  /**
   * Convert a float to an integer. The result only has the lowest iLen binary digits.
   */
  def floatToI(n: Float, iLen: Int, signed: Boolean): BigInt = {
    val lExp = Math.getExponent(n)
    val rExp = lExp - 23
    val frac = (java.lang.Float.floatToRawIntBits(n) & 0x7fffff) | 0x800000;

    if (java.lang.Float.isNaN(n)) 0
    else if (signed) {
      if (java.lang.Float.isInfinite(n)) { if (n > 0.0F) maxSInt(iLen) else minSIntAbs(iLen) }
      else {
        if (lExp >= (iLen - 1)) if (n > 0.0F) maxSInt(iLen) else minSIntAbs(iLen)
        else if (lExp < 0) 0
        else {
          val abs = BigInt(frac) << rExp
          unprepare(if (n < 0.0F) -abs else abs, iLen)
        }
      }
    } else {
      if (n < 0.0F) 0
      else if (java.lang.Float.isInfinite(n)) maxUInt(iLen)
      else {
        if (lExp >= iLen) maxUInt(iLen)
        else if (lExp < 0) 0
        else unprepare(BigInt(frac) << rExp, iLen)
      }
    }
  }

  /**
   * Convert a float to an integer. The result only has the lowest iLen binary digits.
   */
  def doubleToI(n: Double, iLen: Int, signed: Boolean): BigInt = {
    val lExp = Math.getExponent(n)
    val rExp = lExp - 52
    val frac = (java.lang.Double.doubleToRawLongBits(n) & 0xfffffffffffffL) | 0x10000000000000L;
100

Kunshan Wang's avatar
Kunshan Wang committed
101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126
    if (java.lang.Double.isNaN(n)) 0
    else if (signed) {
      if (java.lang.Double.isInfinite(n)) { if (n > 0.0D) maxSInt(iLen) else minSIntAbs(iLen) }
      else {
        if (lExp >= (iLen - 1)) if (n > 0.0D) maxSInt(iLen) else minSIntAbs(iLen)
        else if (lExp < 0) 0
        else {
          val abs = BigInt(frac) << rExp
          unprepare(if (n < 0.0D) -abs else abs, iLen)
        }
      }
    } else {
      if (n < 0.0D) 0
      else if (java.lang.Double.isInfinite(n)) maxUInt(iLen)
      else {
        if (lExp >= iLen) maxUInt(iLen)
        else if (lExp < 0) 0
        else unprepare(BigInt(frac) << rExp, iLen)
      }
    }
  }

  def tr64IsInt(opnd: Long): Boolean = {
    (opnd & 0x7ff0000000000001L) == 0x7ff0000000000001L
  }

127
  def tr64IsFP(opnd: Long): Boolean = {
Kunshan Wang's avatar
Kunshan Wang committed
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
    (opnd & 0x7ff0000000000001L) != 0x7ff0000000000001L &&
      (opnd & 0x7ff0000000000003L) != 0x7ff0000000000002L
  }

  def tr64IsRef(opnd: Long): Boolean = {
    (opnd & 0x7ff0000000000003L) == 0x7ff0000000000002L
  }

  def intToTr64(opnd: Long): Long = {
    (0x7ff0000000000001L | ((opnd & 0x7ffffffffffffL) << 1) |
      ((opnd & 0x8000000000000L) << 12))
  }

  def fpToTr64(opnd: Double): Long = {
    var bits = java.lang.Double.doubleToRawLongBits(opnd)
    if (java.lang.Double.isNaN(opnd)) {
      bits = bits & 0xfff8000000000000L | 0x0000000000000008L
    }
    bits
  }

  def refToTr64(opnd: Long, tag: Long): Long = {
    (0x7ff0000000000002L | (opnd & 0x7ffffffffff8L) | ((opnd & 0x800000000000L) << 16) |
      ((tag & 0x3eL) << 46) |
      ((tag & 0x1) << 2))
  }

  def tr64ToInt(opnd: Long): Long = {
    (((opnd & 0xffffffffffffeL) >> 1) | ((opnd & 0x8000000000000000L) >> 12) & (1L << 51))
  }

159
  def tr64ToFP(opnd: Long): Double = java.lang.Double.longBitsToDouble(opnd)
Kunshan Wang's avatar
Kunshan Wang committed
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187

  def tr64ToRef(opnd: Long): Long = {
    ((opnd & 0x7ffffffffff8L) |
      (((~(((opnd & 0x8000000000000000L) << 1) - 1)) >> 17) &
        0xffff800000000000L))
  }

  def tr64ToTag(opnd: Long): Long = {
    (((opnd & 0x000f800000000000L) >> 46) | ((opnd & 0x4) >> 2))
  }
}

object PrimOpHelpers {
  @throws(classOf[UvmDivisionByZeroException])
  def intBinOp(op: BinOptr.BinOptr, l: Int, op1v: BigInt, op2v: BigInt, ctx: => String): BigInt = {
    def pu(v: BigInt): BigInt = OpHelper.prepareUnsigned(v, l)
    def ps(v: BigInt): BigInt = OpHelper.prepareSigned(v, l)
    def up(v: BigInt): BigInt = OpHelper.unprepare(v, l)
    def shiftMask = {
      var i = 1
      while (i < l) { i <<= 1 }
      i - 1
    }
    def checkDivByZero(): Unit = {
      if (op2v == 0) throw new UvmDivisionByZeroException(ctx + "Division by zero.")
    }

    up(op match {
188 189 190
      case BinOptr.ADD  => pu(op1v) + pu(op2v)
      case BinOptr.SUB  => pu(op1v) - pu(op2v)
      case BinOptr.MUL  => pu(op1v) * pu(op2v)
Kunshan Wang's avatar
Kunshan Wang committed
191 192 193 194
      case BinOptr.UDIV => { checkDivByZero(); pu(op1v) / pu(op2v) }
      case BinOptr.SDIV => { checkDivByZero(); ps(op1v) / ps(op2v) }
      case BinOptr.UREM => { checkDivByZero(); pu(op1v) % pu(op2v) }
      case BinOptr.SREM => { checkDivByZero(); ps(op1v) % ps(op2v) }
195
      case BinOptr.SHL  => pu(op1v) << (op2v.intValue & shiftMask)
Kunshan Wang's avatar
Kunshan Wang committed
196 197
      case BinOptr.LSHR => pu(op1v) >> (op2v.intValue & shiftMask)
      case BinOptr.ASHR => ps(op1v) >> (op2v.intValue & shiftMask)
198 199 200 201
      case BinOptr.AND  => pu(op1v) & pu(op2v)
      case BinOptr.OR   => pu(op1v) | pu(op2v)
      case BinOptr.XOR  => pu(op1v) ^ pu(op2v)
      case _            => throw new UvmRuntimeException(ctx + "Binary operator %s is not suitable for integer.".format(op))
Kunshan Wang's avatar
Kunshan Wang committed
202 203 204
    })
  }

205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
  def intBinOpFlags(op: BinOptr.BinOptr, l: Int, op1v: BigInt, op2v: BigInt, resv: BigInt, ctx: => String): (Boolean, Boolean, Boolean, Boolean) = {
    def pu(v: BigInt): BigInt = OpHelper.prepareUnsigned(v, l)
    def ps(v: BigInt): BigInt = OpHelper.prepareSigned(v, l)
    def up(v: BigInt): BigInt = OpHelper.unprepare(v, l)

    val (op1u, op1s) = (pu(op1v), ps(op1v))
    val (op2u, op2s) = (pu(op2v), ps(op2v))
    val (resu, ress) = (pu(resv), ps(resv))
    
    val n = ress < 0
    val z = resu == 0

    val (c, v) = op match {
      case BinOptr.ADD => (resu != op1u + op2u, ress != op1s + op2s)
      case BinOptr.SUB => (resu != op1u - op2u, ress != op1s - op2s)
      case BinOptr.MUL => (resu != op1u * op2u, ress != op1s * op2s)
      case _           => (false, false)
    }

    (n, z, c, v)
  }

Kunshan Wang's avatar
Kunshan Wang committed
227 228 229 230 231 232 233
  def floatBinOp(op: BinOptr.BinOptr, op1v: Float, op2v: Float, ctx: => String): Float = {
    op match {
      case BinOptr.FADD => op1v + op2v
      case BinOptr.FSUB => op1v - op2v
      case BinOptr.FMUL => op1v * op2v
      case BinOptr.FDIV => op1v / op2v
      case BinOptr.FREM => Math.IEEEremainder(op1v, op2v).toFloat
234
      case _            => throw new UvmRuntimeException(ctx + "Binary operator %s is not suitable for float.".format(op))
Kunshan Wang's avatar
Kunshan Wang committed
235 236 237 238 239 240 241 242 243 244
    }
  }

  def doubleBinOp(op: BinOptr.BinOptr, op1v: Double, op2v: Double, ctx: => String): Double = {
    op match {
      case BinOptr.FADD => op1v + op2v
      case BinOptr.FSUB => op1v - op2v
      case BinOptr.FMUL => op1v * op2v
      case BinOptr.FDIV => op1v / op2v
      case BinOptr.FREM => Math.IEEEremainder(op1v, op2v)
245
      case _            => throw new UvmRuntimeException(ctx + "Binary operator %s is not suitable for double.".format(op))
Kunshan Wang's avatar
Kunshan Wang committed
246 247 248 249 250 251 252 253
    }
  }

  def intCmp(op: CmpOptr.CmpOptr, l: Int, op1v: BigInt, op2v: BigInt, ctx: => String): Boolean = {
    def pu(v: BigInt): BigInt = OpHelper.prepareUnsigned(v, l)
    def ps(v: BigInt): BigInt = OpHelper.prepareSigned(v, l)

    op match {
254 255
      case CmpOptr.EQ  => pu(op1v) == pu(op2v)
      case CmpOptr.NE  => pu(op1v) != pu(op2v)
Kunshan Wang's avatar
Kunshan Wang committed
256 257 258 259 260 261 262 263
      case CmpOptr.UGT => pu(op1v) > pu(op2v)
      case CmpOptr.UGE => pu(op1v) >= pu(op2v)
      case CmpOptr.ULT => pu(op1v) < pu(op2v)
      case CmpOptr.ULE => pu(op1v) <= pu(op2v)
      case CmpOptr.SGT => ps(op1v) > ps(op2v)
      case CmpOptr.SGE => ps(op1v) >= ps(op2v)
      case CmpOptr.SLT => ps(op1v) < ps(op2v)
      case CmpOptr.SLE => ps(op1v) <= ps(op2v)
264
      case _           => throw new UvmRuntimeException(ctx + "Comparison operator %s not suitable for integers".format(op))
Kunshan Wang's avatar
Kunshan Wang committed
265 266 267 268 269 270 271 272
    }
  }

  def floatCmp(op: CmpOptr.CmpOptr, op1v: Float, op2v: Float, ctx: => String): Boolean = {
    import java.lang.Float.isNaN
    def ord = !isNaN(op1v) && !isNaN(op2v)
    def uno = isNaN(op1v) || isNaN(op2v)
    op match {
273
      case CmpOptr.FTRUE  => true
Kunshan Wang's avatar
Kunshan Wang committed
274
      case CmpOptr.FFALSE => false
275 276 277 278 279 280 281 282 283 284 285 286 287 288 289
      case CmpOptr.FOEQ   => ord && op1v == op2v
      case CmpOptr.FONE   => ord && op1v != op2v
      case CmpOptr.FOGT   => ord && op1v > op2v
      case CmpOptr.FOGE   => ord && op1v >= op2v
      case CmpOptr.FOLT   => ord && op1v < op2v
      case CmpOptr.FOLE   => ord && op1v <= op2v
      case CmpOptr.FORD   => ord
      case CmpOptr.FUEQ   => uno || op1v == op2v
      case CmpOptr.FUNE   => uno || op1v != op2v
      case CmpOptr.FUGT   => uno || op1v > op2v
      case CmpOptr.FUGE   => uno || op1v >= op2v
      case CmpOptr.FULT   => uno || op1v < op2v
      case CmpOptr.FULE   => uno || op1v <= op2v
      case CmpOptr.FUNO   => uno
      case _              => throw new UvmRuntimeException(ctx + "Comparison operator %s is not suitable for float.".format(op))
Kunshan Wang's avatar
Kunshan Wang committed
290 291 292 293 294 295 296 297
    }
  }

  def doubleCmp(op: CmpOptr.CmpOptr, op1v: Double, op2v: Double, ctx: => String): Boolean = {
    import java.lang.Double.isNaN
    def ord = !isNaN(op1v) && !isNaN(op2v)
    def uno = isNaN(op1v) || isNaN(op2v)
    op match {
298
      case CmpOptr.FTRUE  => true
Kunshan Wang's avatar
Kunshan Wang committed
299
      case CmpOptr.FFALSE => false
300 301 302 303 304 305 306 307 308 309 310 311 312 313 314
      case CmpOptr.FOEQ   => ord && op1v == op2v
      case CmpOptr.FONE   => ord && op1v != op2v
      case CmpOptr.FOGT   => ord && op1v > op2v
      case CmpOptr.FOGE   => ord && op1v >= op2v
      case CmpOptr.FOLT   => ord && op1v < op2v
      case CmpOptr.FOLE   => ord && op1v <= op2v
      case CmpOptr.FORD   => ord
      case CmpOptr.FUEQ   => uno || op1v == op2v
      case CmpOptr.FUNE   => uno || op1v != op2v
      case CmpOptr.FUGT   => uno || op1v > op2v
      case CmpOptr.FUGE   => uno || op1v >= op2v
      case CmpOptr.FULT   => uno || op1v < op2v
      case CmpOptr.FULE   => uno || op1v <= op2v
      case CmpOptr.FUNO   => uno
      case _              => throw new UvmRuntimeException(ctx + "Comparison operator %s is not suitable for double.".format(op))
Kunshan Wang's avatar
Kunshan Wang committed
315 316
    }
  }
317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351

  def refCmp(op: CmpOptr.CmpOptr, op1v: Word, op2v: Word, ctx: => String): Boolean = {
    op match {
      case CmpOptr.EQ => op1v == op2v
      case CmpOptr.NE => op1v != op2v
      case _          => throw new UvmRuntimeException(ctx + "Comparison operator %s is not suitable for ref.".format(op))
    }
  }

  def irefCmp(op: CmpOptr.CmpOptr, op1b: Word, op1o: Word, op2b: Word, op2o: Word, ctx: => String): Boolean = {
    val a1 = op1b + op1o
    val a2 = op2b + op2o

    def warnDiffObj() = if (op1b != op2b) throw new UvmRuntimeException(
      ctx + "Attempt to compare order of irefs in two different objects. lhs: 0x%x+0x%x rhs: 0x%x+0x%x".format(
        op1b, op1o, op2b, op2o))

    op match {
      case CmpOptr.EQ  => a1 == a2
      case CmpOptr.NE  => a1 != a2
      case CmpOptr.ULT => { warnDiffObj(); a1 < a2 }
      case CmpOptr.ULE => { warnDiffObj(); a1 <= a2 }
      case CmpOptr.UGT => { warnDiffObj(); a1 > a2 }
      case CmpOptr.UGE => { warnDiffObj(); a1 >= a2 }
      case _           => throw new UvmRuntimeException(ctx + "Comparison operator %s is not suitable for iref.".format(op))
    }
  }

  def objCmp[T <: AnyRef](op: CmpOptr.CmpOptr, obj1: T, obj2: T, kind: String, ctx: => String): Boolean = {
    op match {
      case CmpOptr.EQ => obj1 eq obj2
      case CmpOptr.NE => obj1 ne obj2
      case _          => throw new UvmRuntimeException(ctx + "Comparison operator %s is not suitable for %s.".format(op, kind))
    }
  }
Kunshan Wang's avatar
Kunshan Wang committed
352
}
Kunshan Wang's avatar
Kunshan Wang committed
353

354
object MemoryOperations {
355 356 357 358 359 360 361 362 363

  def addressOf(ptr: Boolean, vb: ValueBox): Word = {
    if (ptr) {
      vb.asInstanceOf[BoxPointer].addr
    } else {
      val lb = vb.asInstanceOf[BoxIRef]
      lb.objRef + lb.offset
    }
  }
364

365 366 367 368 369 370 371
  def noAccessViaPointer(ptr: Boolean, ty: Type) {
    if (ptr) {
      throw new UvmIllegalMemoryAccessException("Cannot access type %s via pointer".format(ty.repr))
    }
  }

  def load(ptr: Boolean, ty: Type, loc: Word, br: ValueBox)(implicit microVM: MicroVM, memorySupport: MemorySupport): Unit = {
372 373
    def loadScalar(ty: Type, loc: Word, br: ValueBox): Unit = {
      def loadEntity[T: CanBeIntegerized](): Unit = {
374
        noAccessViaPointer(ptr, ty)
375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390
        val obj = memorySupport.loadEntity[T](loc)
        br.asInstanceOf[BoxOpaque[T]].obj = obj
      }
      ty match {
        case TypeInt(l) =>
          val bi: BigInt = l match {
            case 8  => memorySupport.loadByte(loc, !ptr)
            case 16 => memorySupport.loadShort(loc, !ptr)
            case 32 => memorySupport.loadInt(loc, !ptr)
            case 64 => memorySupport.loadLong(loc, !ptr)
            case 128 => {
              val lowWord = memorySupport.loadLong(loc, !ptr)
              val highWord = memorySupport.loadLong(loc + 8, !ptr)
              (BigInt(highWord) << 64) + lowWord
            }
            case _ => throw new UvmUnimplementedOperationException(
391
              "Loading int of length %d is not supported".format(l))
392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420
          }
          br.asInstanceOf[BoxInt].value = OpHelper.unprepare(bi, l)
        case _: TypeFloat =>
          val fv = memorySupport.loadFloat(loc, !ptr)
          br.asInstanceOf[BoxFloat].value = fv
        case _: TypeDouble =>
          val dv = memorySupport.loadDouble(loc, !ptr)
          br.asInstanceOf[BoxDouble].value = dv
        case _: AbstractPointerType =>
          val addr = memorySupport.loadLong(loc, !ptr)
          br.asInstanceOf[BoxPointer].addr = addr
        case _: TypeRef =>
          noAccessViaPointer(ptr, ty)
          val addr = memorySupport.loadLong(loc)
          br.asInstanceOf[BoxRef].objRef = addr
        case _: TypeIRef =>
          noAccessViaPointer(ptr, ty)
          val base = memorySupport.loadLong(loc)
          val offset = memorySupport.loadLong(loc + WORD_SIZE_BYTES)
          br.asInstanceOf[BoxIRef].oo = (base, offset)
        case _: TypeTagRef64 =>
          noAccessViaPointer(ptr, ty)
          val raw = memorySupport.loadLong(loc)
          br.asInstanceOf[BoxTagRef64].raw = raw
        case _: TypeFuncRef        => loadEntity[Function]()
        case _: TypeThreadRef      => loadEntity[InterpreterThread]()
        case _: TypeStackRef       => loadEntity[InterpreterStack]()
        case _: TypeFrameCursorRef => loadEntity[FrameCursor]()
        case _: TypeIRBuilderRef   => loadEntity[IRBuilder]()
421 422
        case _ => throw new UvmUnimplementedOperationException(
          "Loading of type %s is not supported".format(ty.getClass.getName))
423
      }
424 425 426 427
    }

    ty match {
      case TypeVector(ety, len) =>
Kunshan Wang's avatar
Kunshan Wang committed
428
        val brs = br.asInstanceOf[BoxSeq].values
429 430 431 432 433 434 435 436
        val elemSkip = alignUp(sizeOf(ety), alignOf(ety))
        for ((brElem, i) <- brs.zipWithIndex) {
          loadScalar(ety, loc + elemSkip * i, brElem)
        }
      case sty => loadScalar(sty, loc, br)
    }
  }

437
  def store(ptr: Boolean, ty: Type, loc: Word, nvb: ValueBox)(implicit microVM: MicroVM, memorySupport: MemorySupport): Unit = {
438 439
    def storeScalar(ty: Type, loc: Word, nvb: ValueBox): Unit = {
      def storeEntity[T: CanBeIntegerized](): Unit = {
440
        noAccessViaPointer(ptr, ty)
441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456
        val obj = nvb.asInstanceOf[BoxOpaque[T]].obj
        memorySupport.storeEntity[T](loc, obj)
      }
      ty match {
        case TypeInt(l) =>
          val bi = nvb.asInstanceOf[BoxInt].value
          l match {
            case 8  => memorySupport.storeByte(loc, bi.byteValue, !ptr)
            case 16 => memorySupport.storeShort(loc, bi.shortValue, !ptr)
            case 32 => memorySupport.storeInt(loc, bi.intValue, !ptr)
            case 64 => memorySupport.storeLong(loc, bi.longValue, !ptr)
            case 128 => {
              memorySupport.storeLong(loc, (bi & 0xffffffffffffffffL).longValue, !ptr)
              memorySupport.storeLong(loc + 8, (bi >> 64).longValue, !ptr)
            }
            case _ => throw new UvmUnimplementedOperationException(
457
              "Storing int of length %d is not supported".format(l))
458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485
          }
        case _: TypeFloat =>
          val fv = nvb.asInstanceOf[BoxFloat].value
          memorySupport.storeFloat(loc, fv, !ptr)
        case _: TypeDouble =>
          val dv = nvb.asInstanceOf[BoxDouble].value
          memorySupport.storeDouble(loc, dv, !ptr)
        case _: AbstractPointerType =>
          val addr = nvb.asInstanceOf[BoxPointer].addr
          memorySupport.storeLong(loc, addr, !ptr)
        case _: TypeRef =>
          noAccessViaPointer(ptr, ty)
          val addr = nvb.asInstanceOf[BoxRef].objRef
          memorySupport.storeLong(loc, addr)
        case _: TypeIRef =>
          noAccessViaPointer(ptr, ty)
          val BoxIRef(base, offset) = nvb.asInstanceOf[BoxIRef]
          memorySupport.storeLong(loc, base)
          memorySupport.storeLong(loc + WORD_SIZE_BYTES, offset)
        case _: TypeTagRef64 =>
          noAccessViaPointer(ptr, ty)
          val raw = nvb.asInstanceOf[BoxTagRef64].raw
          memorySupport.storeLong(loc, raw)
        case _: TypeFuncRef        => storeEntity[Function]()
        case _: TypeThreadRef      => storeEntity[InterpreterThread]()
        case _: TypeStackRef       => storeEntity[InterpreterStack]()
        case _: TypeFrameCursorRef => storeEntity[FrameCursor]()
        case _: TypeIRBuilderRef   => storeEntity[IRBuilder]()
486 487
        case _ => throw new UvmUnimplementedOperationException(
          "Storing of type %s is not supported".format(ty.getClass.getName))
488
      }
489 490 491 492
    }

    ty match {
      case TypeVector(ety, len) =>
Kunshan Wang's avatar
Kunshan Wang committed
493
        val nvbs = nvb.asInstanceOf[BoxSeq].values
494
        val elemSkip = alignUp(sizeOf(ety), alignOf(ety))
495 496
        for ((nvbElem, i) <- nvbs.zipWithIndex) {
          storeScalar(ety, loc + elemSkip * i, nvbElem)
497
        }
498
      case sty => storeScalar(sty, loc, nvb)
499 500 501 502 503 504
    }
  }

  /**
   * Compare exchange. The result (the old value) is written into br. Return true if successful, false otherwise.
   */
505
  def cmpXchg(ptr: Boolean, ty: Type, loc: Word, eb: ValueBox, db: ValueBox, br: ValueBox)(implicit microVM: MicroVM, memorySupport: MemorySupport): Boolean = {
506 507 508 509 510 511 512 513
    def cmpXchgEntity[T: CanBeIntegerized](): Boolean = {
      noAccessViaPointer(ptr, ty)
      val eObj = eb.asInstanceOf[BoxOpaque[T]].obj
      val dObj = db.asInstanceOf[BoxOpaque[T]].obj
      val (succ, rObj) = memorySupport.cmpXchgEntity(loc, eObj, dObj)
      br.asInstanceOf[BoxOpaque[T]].obj = rObj
      succ
    }
514 515 516 517 518 519
    ty match {
      case TypeInt(l) =>
        val ebi = eb.asInstanceOf[BoxInt].value
        val dbi = db.asInstanceOf[BoxInt].value
        val (succ, rbi) = l match {
          case 32 => {
520
            val (succ2, rv) = memorySupport.cmpXchgInt(loc, ebi.intValue, dbi.intValue, !ptr)
521 522 523
            (succ2, BigInt(rv))
          }
          case 64 => {
524
            val (succ2, rv) = memorySupport.cmpXchgLong(loc, ebi.longValue, dbi.longValue, !ptr)
525 526
            (succ2, BigInt(rv))
          }
527
          case _ => throw new UvmUnimplementedOperationException("CmpXchg on int of length %d is not supported".format(l))
528 529 530
        }
        br.asInstanceOf[BoxInt].value = OpHelper.unprepare(rbi, l)
        succ
531 532 533 534 535 536
      case _: AbstractPointerType =>
        val el = eb.asInstanceOf[BoxPointer].addr
        val dl = db.asInstanceOf[BoxPointer].addr
        val (succ, rl) = memorySupport.cmpXchgLong(loc, el, dl, !ptr)
        br.asInstanceOf[BoxPointer].addr = rl
        succ
537
      case _: TypeRef =>
538
        noAccessViaPointer(ptr, ty)
539 540
        val el = eb.asInstanceOf[BoxRef].objRef
        val dl = db.asInstanceOf[BoxRef].objRef
541
        val (succ, rl) = memorySupport.cmpXchgLong(loc, el, dl)
542 543 544
        br.asInstanceOf[BoxRef].objRef = rl
        succ
      case _: TypeIRef =>
545
        noAccessViaPointer(ptr, ty)
546 547
        val BoxIRef(el, eh) = eb.asInstanceOf[BoxIRef]
        val BoxIRef(dl, dh) = db.asInstanceOf[BoxIRef]
548
        val (succ, (rl, rh)) = memorySupport.cmpXchgI128(loc, (el, eh), (dl, dh))
549 550
        br.asInstanceOf[BoxIRef].oo = (rl, rh)
        succ
551 552 553 554 555 556 557
      case _: TypeFuncRef        => cmpXchgEntity[Function]()
      case _: TypeThreadRef      => cmpXchgEntity[InterpreterThread]()
      case _: TypeStackRef       => cmpXchgEntity[InterpreterStack]()
      case _: TypeFrameCursorRef => cmpXchgEntity[FrameCursor]()
      case _: TypeIRBuilderRef   => cmpXchgEntity[IRBuilder]()
      case _ => throw new UvmUnimplementedOperationException(
        "CmpXchg of type %s is not suppored".format(ty.getClass.getName))
558 559 560
    }
  }

561
  def atomicRMW(ptr: Boolean, ty: Type, op: AtomicRMWOptr, loc: Word, ob: ValueBox, br: ValueBox)(implicit microVM: MicroVM, memorySupport: MemorySupport): Unit = {
562 563 564 565
    ty match {
      case TypeInt(l) =>
        val obi = ob.asInstanceOf[BoxInt].value
        val rbi: BigInt = l match {
566 567
          case 32 => memorySupport.atomicRMWInt(op, loc, obi.intValue, !ptr)
          case 64 => memorySupport.atomicRMWLong(op, loc, obi.longValue, !ptr)
568
          case _  => throw new UvmUnimplementedOperationException("AtomicRMW on int of length %d is not supported".format(l))
569 570 571 572
        }
        br.asInstanceOf[BoxInt].value = OpHelper.unprepare(rbi, l)
      case _ =>
        if (op != XCHG) {
573
          throw new UvmUnimplementedOperationException("AtomicRMW operation other than XCHG only supports int. %s found.".format(ty.getClass.getName))
574
        } else {
575 576 577 578 579 580
          def xchgEntity[T: CanBeIntegerized](): Unit = {
            noAccessViaPointer(ptr, ty)
            val obj = ob.asInstanceOf[BoxOpaque[T]].obj
            val oldObj = memorySupport.xchgEntity(loc, obj)
            br.asInstanceOf[BoxOpaque[T]].obj = oldObj
          }
581
          ty match {
582 583 584 585
            case _: AbstractPointerType =>
              val ol = ob.asInstanceOf[BoxPointer].addr
              val rl = memorySupport.atomicRMWLong(op, loc, ol, !ptr)
              br.asInstanceOf[BoxPointer].addr = rl
586
            case _: TypeRef =>
587
              noAccessViaPointer(ptr, ty)
588
              val ol = ob.asInstanceOf[BoxRef].objRef
589
              val rl = memorySupport.atomicRMWLong(op, loc, ol)
590 591
              br.asInstanceOf[BoxRef].objRef = rl
            case _: TypeIRef =>
592
              noAccessViaPointer(ptr, ty)
593
              val BoxIRef(ol, oh) = ob.asInstanceOf[BoxIRef]
594
              val (rl, rh) = memorySupport.xchgI128(loc, (ol, oh))
595
              br.asInstanceOf[BoxIRef].oo = (rl, rh)
596 597 598 599 600
            case _: TypeFuncRef        => xchgEntity[Function]()
            case _: TypeThreadRef      => xchgEntity[InterpreterThread]()
            case _: TypeStackRef       => xchgEntity[InterpreterStack]()
            case _: TypeFrameCursorRef => xchgEntity[FrameCursor]()
            case _: TypeIRBuilderRef   => xchgEntity[IRBuilder]()
601
            case _ =>
602
              throw new UvmUnimplementedOperationException("AtomicRMW XCHG of type %s is not supporing".format(ty.getClass.getName))
603 604 605
          }
        }
    }
Kunshan Wang's avatar
Kunshan Wang committed
606
  }
607 608 609 610

  /**
   * Check if a memory location still holds a particular value. Used by futex.
   */
611
  def cmpInt(len: Int, loc: Word, expected: BigInt)(implicit memorySupport: MemorySupport): Boolean = len match {
612
    case 64 => {
613
      val expNum = OpHelper.prepareSigned(expected, len).longValue
614
      val actualNum = memorySupport.loadLong(loc)
615 616 617
      expNum == actualNum
    }
    case 32 => {
618
      val expNum = OpHelper.prepareSigned(expected, len).intValue
619
      val actualNum = memorySupport.loadInt(loc)
620 621
      expNum == actualNum
    }
622
    case _ => throw new UvmUnimplementedOperationException("Futex of %d bit int is not supported".format(len))
623
  }
624 625 626 627 628 629 630 631 632 633 634 635

  val US_ASCII = Charset.forName("US-ASCII")

  /**
   * Read an ASCII string from the memory.
   *
   * @param loc A ref to a @uvm.meta.bytes object.
   */
  def bytesToStr(loc: Word)(implicit memorySupport: MemorySupport): String = {
    // It is a hybrid<@i64 @i8> object. The length is determined by the fixed part. 
    val len = memorySupport.loadLong(loc)
    val bytes = new Array[Byte](len.toInt)
636
    val begin = loc + WORD_SIZE_BYTES
637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652
    memorySupport.loadBytes(begin, bytes, 0, len, true)

    val result = new String(bytes, US_ASCII)
    result
  }

  /**
   * Create a Mu @uvm.meta.bytes object to hold an ASCII string.
   *
   * @return The address of the allocated object.
   */
  def strToBytes(str: String)(implicit memorySupport: MemorySupport, mutator: Mutator): Word = {
    val bytes = str.getBytes(US_ASCII)
    val len = bytes.length
    val loc = mutator.newHybrid(InternalTypes.BYTES, len)
    memorySupport.storeLong(loc, bytes.length.toLong)
653
    val begin = loc + WORD_SIZE_BYTES
654
    memorySupport.storeBytes(begin, bytes, 0, len, true)
655

656 657
    loc
  }
658

659 660 661
  /**
   * Load irnoderef value from the memory. Use fake value from microVM.irNodeRegistry
   */
662 663
  def loadIRBuilder(loc: Word)(implicit microVM: MicroVM, memorySupport: MemorySupport): Option[IRBuilder] = {
    memorySupport.loadEntity[IRBuilder](loc)
664 665 666 667 668
  }

  /**
   * Store irnoderef value into the memory. Use fake value from microVM.irNodeRegistry
   */
669 670
  def storeIRBuilder(loc: Word, maybeIRBuilder: Option[IRBuilder])(implicit microVM: MicroVM, memorySupport: MemorySupport): Unit = {
    memorySupport.storeEntity(loc, maybeIRBuilder)
671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689
  }

  def loadInt32Array(base: Word, len: Word)(implicit memorySupport: MemorySupport): IndexedSeq[Int] = {
    if (base == 0L) {
      IndexedSeq[Int]()
    } else {
      for (i <- 0L until len) yield {
        val addr = base + i * 4L
        val v = memorySupport.loadInt(addr)
        v
      }
    }
  }

  def loadInt64Array(base: Word, len: Word)(implicit memorySupport: MemorySupport): IndexedSeq[Long] = {
    if (base == 0L) {
      IndexedSeq[Long]()
    } else {
      for (i <- 0L until len) yield {
Kunshan Wang's avatar
Kunshan Wang committed
690
        val addr = base + i * 8L
691 692 693 694 695
        val v = memorySupport.loadLong(addr)
        v
      }
    }
  }
Kunshan Wang's avatar
Kunshan Wang committed
696 697
}