1N/A# <return type: i:integer f:floating-point> <#floating-point-args> <function-name> [<alias> ...]
1N/Ai 1 issubnormal fpclassify=FP_SUBNORMAL
1N/Ai 1 iszero fpclassify=FP_ZERO fpclass=FP_NZERO|FP_PZERO {return a1==0.0||a1==-0.0;}
1N/Af 1 round {Sfdouble_t r;Sflong_t y;y=floor(2*a1);r=rint(a1);if(2*a1==y)r+=(r<a1)-(a1<0);return r;}
1N/Af 1 tgamma {Sfdouble_t r=exp(lgamma(a1));return (signgam<0)?-r:r;}