* optabs.h (enum optab_index): Add new OTI_isinf.
(isinf_optab): Define corresponding macro.
* optabs.c (init_optabs): Initialize isinf_optab.
* genopinit.c (optabs): Implement isinf_optab using isinf?f2
patterns.
* builtins.c (mathfn_built_in): Handle BUILT_IN_ISINF{,F,L}.
(expand_builtin_interclass_mathfn): Expand BUILT_IN_ISINF{,F,L}
using isinf_optab.
(expand_builtin): Expand BUILT_IN_ISINF{,F,L} using
expand_builtin_interclass_mathfn.
* reg_stack.c (subst_stack_regs_pat): Handle UNSPEC_FXAM.
* config/i386/i386.md (UNSPEC_FXAM): New constant.
(fxam<mode>2_i387): New insn pattern.
(isinf<mode>2) New expander to implement isinf, isinff and isinfl
built-in functions as x87 inline asm.
testsuite/ChangeLog:
* gcc.dg/builtins-63.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@121419 138bc75d-0d04-0410-961f-82ee72b054a4