2007-07-09 Wolfgang Gellerich <gellerich@de.ibm.com>

2007-07-09  Wolfgang Gellerich  <gellerich@de.ibm.com>

	* optabs.h: Added declaration for signbit_optab.
	* optabs.c: (init_optabs): Added initialization for signbit_optab.
	* genoptinit.c (optabs): Added entry for signbit insns.
	* builtins.c (expand_builtin_signbit): Added code to use a signbit insn,
	if available.
	* config/s390/s390.h (S390_TDC_SIGNBIT_SET): New constant.
	* config/s390/s390.md (signbit<mode>2): New expander.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@126495 138bc75d-0d04-0410-961f-82ee72b054a4