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 specify acceptable modes for the optab. https://gcc.gnu.org/pipermail/gcc-patches/2024-May/652172.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 bc67324872f..7de9c2b5b70 100644 --- a/gcc/doc/md.texi +++ b/gcc/doc/md.texi @@ -8566,6 +8566,15 @@ and to 0 otherwise. If this pattern @code{FAIL}, a call to the library function @code{isfinite} is used. +@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 @code{SFmode}, +@code{DFmode}, or @code{TFmode} floating point number and to 0 +otherwise. + +If this pattern @code{FAIL}, a call to the library function +@code{isnormal} is used. + @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")
