From bb8081f57f23a3e1b28b1b7104f24d17da9a3d82 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Fri, 23 Sep 2016 21:54:21 +0000 Subject: Add iszero. TS 18661-1 adds an iszero classification macro to . This patch implements it for glibc. There are no new underlying functions in libm because the implementation uses fpclassify when sNaN support is required and a direct comparison otherwise; any optimizations for this macro should be done through adding __builtin_iszero in GCC and using it in the header for suitable GCC versions, not through adding other optimized inline or out-of-line versions to glibc. Tested for x86_64 and x86. * math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (iszero): New macro. * math/libm-test.inc (iszero_test_data): New array. (iszero_test): New function. (main): Call iszero_test. * manual/arith.texi (Floating Point Classes): Document iszero. * manual/libm-err-tab.pl: Update comment on interfaces without ulps tabulated. --- manual/libm-err-tab.pl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'manual/libm-err-tab.pl') diff --git a/manual/libm-err-tab.pl b/manual/libm-err-tab.pl index adeadb8..2386772 100755 --- a/manual/libm-err-tab.pl +++ b/manual/libm-err-tab.pl @@ -78,7 +78,7 @@ use vars qw (%results @all_floats %suffices @all_functions); "scalbn", "sin", "sincos", "sinh", "sqrt", "tan", "tanh", "tgamma", "trunc", "y0", "y1", "yn" ); # fpclassify, isnormal, isfinite, isinf, isnan, issignaling, -# issubnormal, signbit, isgreater, isgreaterequal, isless, +# issubnormal, iszero, signbit, isgreater, isgreaterequal, isless, # islessequal, islessgreater, isunordered are not tabulated. if ($#ARGV == 0) { -- cgit v1.1