p.errorf("TEXT %q: ABIInternal requires NOSPLIT", name)
	}

	// Next operand is the frame and arg size.
	// Bizarre syntax: $frameSize-argSize is two words, not subtraction.
	// Both frameSize and argSize must be simple integers; only frameSize
	// can be negative.
	// The "-argSize" may be missing; if so, set it to objabi.ArgsSizeUnknown.
	// Parse left to right.
	op := operands[next]
	if len(op) < 2 || op[0].ScanToken != '$' {

  private static int[] expandAndFillWithAbsent(int[] array, int newSize) {
    int oldSize = array.length;
    int[] result = Arrays.copyOf(array, newSize);
    Arrays.fill(result, oldSize, newSize, ABSENT);
    return result;
  }

  @Override
  public int size() {
    return size;
  }

  /**

x[i]*y MULHDU R5, R14, R11 // high x[i]*y ADDC R15, R10 ADDZE R11 ADDC R9, R10 ADDZE R11, R9 MULLD R5, R16, R14 // low x[i+1]*y MULHDU R5, R16, R15 // high x[i+1]*y ADDC R17, R14 ADDZE R15 ADDC R9, R14 ADDZE R15, R9 MULLD R5, R18, R16 // low x[i+2]*y MULHDU R5, R18, R17 // high x[i+2]*y ADDC R19, R16 ADDZE R17 ADDC R9, R16 ADDZE R17, R9 MULLD R5, R20, R18 // low x[i+3]*y MULHDU R5, R20, R19 // high x[i+3]*y ADDC R21, R18 ADDZE R19 ADDC R9, R18 ADDZE R19, R9 MOVD R10, 0(R3) // z[i] MOVD R14, 8(R3) // z[i+1]...