From 4ddb2cf6ccc8d2c73cabbaf188352d6a421bc2c4 Mon Sep 17 00:00:00 2001 From: Bruno Haible Date: Fri, 5 Apr 2024 16:45:25 +0200 Subject: [PATCH] exp2l: Work around a NetBSD 10.0/i386 bug. * m4/exp2l.m4 (gl_FUNC_EXP2L): Test the value of exp2l(LDBL_MAX_EXP-1). --- ChangeLog | 5 +++++ m4/exp2l.m4 | 13 ++++++++++--- 2 files changed, 15 insertions(+), 3 deletions(-) diff --git a/ChangeLog b/ChangeLog index 42c86b1cda..1700343465 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2024-04-05 Bruno Haible + + exp2l: Work around a NetBSD 10.0/i386 bug. + * m4/exp2l.m4 (gl_FUNC_EXP2L): Test the value of exp2l(LDBL_MAX_EXP-1). + 2024-04-05 Bruno Haible roundl: Fix a link error on Linux/powerpc64le. diff --git a/m4/exp2l.m4 b/m4/exp2l.m4 index 3d7d5d713a..20a98a1c56 100644 --- a/m4/exp2l.m4 +++ b/m4/exp2l.m4 @@ -1,5 +1,5 @@ -# exp2l.m4 serial 11 -dnl Copyright (C) 2010-2023 Free Software Foundation, Inc. +# exp2l.m4 serial 11.1 +dnl Copyright (C) 2010-2024 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -80,7 +80,7 @@ int main (int argc, char *argv[]) { long double (* volatile my_exp2l) (long double) = argc ? exp2l : dummy; int result = 0; - /* This test fails on NetBSD 9.0. */ + /* This test fails on NetBSD NetBSD 10.0/x86_64. */ { const long double TWO_LDBL_MANT_DIG = /* 2^LDBL_MANT_DIG */ (long double) (1U << ((LDBL_MANT_DIG - 1) / 5)) @@ -93,6 +93,13 @@ int main (int argc, char *argv[]) if (!(err >= -100.0L && err <= 100.0L)) result |= 1; } + /* This test fails on NetBSD 10.0/i386. */ + { + long double x = LDBL_MAX_EXP - 1; + long double z = my_exp2l (x); + if (z + z == z) /* isinf (z) */ + result |= 2; + } return result; } ]])], -- 2.39.5