Hi, This patch adds an optab for __builtin_isnormal. The normal check can be implemented on rs6000 by a single instruction. It needs an optab to be expanded to the certain sequence of instructions.
The subsequent patches will implement the expand on rs6000. Compared to previous version, the main change is to document isnormal in md.texi. https://gcc.gnu.org/pipermail/gcc-patches/2024-April/649366.html Bootstrapped and tested on x86 and powerpc64-linux BE and LE with no regressions. Is this OK for trunk? Thanks Gui Haochen ChangeLog optab: Add isnormal_optab for isnormal builtin gcc/ * builtins.cc (interclass_mathfn_icode): Set optab to isnormal_optab for isnormal builtin. * optabs.def (isnormal_optab): New. * doc/md.texi (isnormal): Document. patch.diff diff --git a/gcc/builtins.cc b/gcc/builtins.cc index b8432f84020..ccd57fce522 100644 --- a/gcc/builtins.cc +++ b/gcc/builtins.cc @@ -2462,6 +2462,7 @@ interclass_mathfn_icode (tree arg, tree fndecl) case BUILT_IN_ISFINITE: builtin_optab = isfinite_optab; break; case BUILT_IN_ISNORMAL: + builtin_optab = isnormal_optab; break; CASE_FLT_FN (BUILT_IN_FINITE): case BUILT_IN_FINITED32: case BUILT_IN_FINITED64: diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi index 8ed70b3feea..b81b9dec18a 100644 --- a/gcc/doc/md.texi +++ b/gcc/doc/md.texi @@ -8562,6 +8562,11 @@ This pattern is not allowed to @code{FAIL}. Set operand 0 to nonzero if operand 1 is a finite floating-point number and to 0 otherwise. +@cindex @code{isnormal@var{m}2} instruction pattern +@item @samp{isnormal@var{m}2} +Set operand 0 to nonzero if operand 1 is a normal floating-point +number and to 0 otherwise. + @end table @end ifset diff --git a/gcc/optabs.def b/gcc/optabs.def index dcd77315c2a..3c401fc0b4c 100644 --- a/gcc/optabs.def +++ b/gcc/optabs.def @@ -353,6 +353,7 @@ OPTAB_D (hypot_optab, "hypot$a3") OPTAB_D (ilogb_optab, "ilogb$a2") OPTAB_D (isinf_optab, "isinf$a2") OPTAB_D (isfinite_optab, "isfinite$a2") +OPTAB_D (isnormal_optab, "isnormal$a2") OPTAB_D (issignaling_optab, "issignaling$a2") OPTAB_D (ldexp_optab, "ldexp$a3") OPTAB_D (log10_optab, "log10$a2")
