if (isAndroid && a == -4294967296L && b == 2147483648L) {
          /*
           * Bug in older versions of Android we test against, since fixed: -9223372036854775808L /
           * -4294967296L = -9223372036854775808L!
           *
           * To be clear, this bug affects not the test's computation of the expected result but the
           * _actual prod code_. But it probably affects only unusual cases.

          assertEquals(expected, BigIntegerMath.divide(p, q, mode));
        }
      }
    }
  }

  private static final BigInteger BAD_FOR_ANDROID_P = new BigInteger("-9223372036854775808");
  private static final BigInteger BAD_FOR_ANDROID_Q = new BigInteger("-1");

  @GwtIncompatible // TODO
  @AndroidIncompatible // slow
  public void testDivNonZeroExact() {

    assertThat(Adapters.INTEGER_AS_LONG.toDer(Long.MIN_VALUE)).isEqualTo(bytes)
  }

  @Test fun `bigger than max long`() {
    val bytes = "0209008000000000000001".decodeHex()
    val bigInteger = BigInteger("9223372036854775809")
    assertThat(Adapters.INTEGER_AS_BIG_INTEGER.fromDer(bytes)).isEqualTo(bigInteger)
    assertThat(Adapters.INTEGER_AS_BIG_INTEGER.toDer(bigInteger)).isEqualTo(bytes)
  }

  @Test fun `utf8 string`() {

// TODO means they cannot be handled by current assembler.

#include "../../../../../runtime/textflag.h"

TEXT asmtest(SB),DUPOK|NOSPLIT,$-8

	AND $(1<<63), R1                           // AND $-9223372036854775808, R1     // 21004192
	ADCW ZR, R8, R10                           // 0a011f1a
	ADC R0, R2, R12                            // 4c00009a
	ADCSW R9, R21, R6                          // a602093a