PR ipa/78555
	* sreal.c (sreal::to_int): Make absolute value before shifting.
	(sreal::operator/): Likewise.
	(sreal_verify_negative_division): New test.
	(void sreal_c_tests): Call the new test.
	* sreal.h (sreal::normalize_up): Use new SREAL_ABS and
	SREAL_SIGN macros.
	(sreal::normalize_down): Likewise.

From-SVN: r243163