diff options
| author | Bruno Haible <bruno@clisp.org> | 2021-01-06 11:06:25 +0100 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2021-01-06 11:11:52 +0100 |
| commit | 1ac1751add634045d353c5ff1eb8f435737bc1ea (patch) | |
| tree | c1648523c1fd5873e04c5fec16125985e2d4fafd | |
| parent | 1ca1485fcab80578c159a38b9fd6776a337a68cf (diff) | |
| download | gnulib-1ac1751add634045d353c5ff1eb8f435737bc1ea.tar.gz | |
ilogb: Fix test failures on AIX 7.1 in 64-bit mode.
* m4/ilogb.m4 (gl_FUNC_ILOGB_WORKS): Test also some denormalized
argument.
* doc/posix-functions/ilogb.texi: Mention the AIX bug.
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | doc/posix-functions/ilogb.texi | 3 | ||||
| -rw-r--r-- | m4/ilogb.m4 | 17 |
3 files changed, 24 insertions, 3 deletions
@@ -1,3 +1,10 @@ +2021-01-06 Bruno Haible <bruno@clisp.org> + + ilogb: Fix test failures on AIX 7.1 in 64-bit mode. + * m4/ilogb.m4 (gl_FUNC_ILOGB_WORKS): Test also some denormalized + argument. + * doc/posix-functions/ilogb.texi: Mention the AIX bug. + 2021-01-05 Bruno Haible <bruno@clisp.org> fclose: Fix test failure on AIX 7.2. diff --git a/doc/posix-functions/ilogb.texi b/doc/posix-functions/ilogb.texi index 1b266766fc..edcba7c6c8 100644 --- a/doc/posix-functions/ilogb.texi +++ b/doc/posix-functions/ilogb.texi @@ -15,6 +15,9 @@ Minix 3.1.8, MSVC 9. This function returns a wrong result for a zero argument on some platforms: OpenBSD 6.7, AIX 5.1. @item +This function returns a wrong result for denormalized arguments on some platforms: +AIX 7.1 64-bit. +@item This function returns a wrong result for an infinite argument on some platforms: NetBSD 7.1, OpenBSD 6.7. @item diff --git a/m4/ilogb.m4 b/m4/ilogb.m4 index 29e472ccd1..54043906d0 100644 --- a/m4/ilogb.m4 +++ b/m4/ilogb.m4 @@ -1,4 +1,4 @@ -# ilogb.m4 serial 6 +# ilogb.m4 serial 7 dnl Copyright (C) 2010-2021 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -44,6 +44,7 @@ AC_DEFUN([gl_FUNC_ILOGB], dnl Test whether ilogb() works. dnl On OpenBSD 6.7, AIX 5.1, ilogb(0.0) is wrong. +dnl On AIX 7.1 in 64-bit mode, ilogb(2^(DBL_MIN_EXP-1)) is wrong. dnl On NetBSD 7.1, OpenBSD 6.7, ilogb(Infinity) is wrong. dnl On NetBSD 7.1, OpenBSD 6.7, ilogb(NaN) is wrong. AC_DEFUN([gl_FUNC_ILOGB_WORKS], @@ -54,6 +55,7 @@ AC_DEFUN([gl_FUNC_ILOGB_WORKS], [ AC_RUN_IFELSE( [AC_LANG_SOURCE([[ +#include <float.h> #include <limits.h> #include <math.h> /* Provide FP_ILOGB0, FP_ILOGBNAN, like in math.in.h. */ @@ -93,17 +95,26 @@ int main (int argc, char *argv[]) if (my_ilogb (x) != FP_ILOGB0) result |= 1; } + /* This test fails on AIX 7.1 in 64-bit mode. */ + { + int i; + x = 0.5; + for (i = DBL_MIN_EXP - 1; i < 0; i++) + x = x * 0.5; + if (x > 0.0 && my_ilogb (x) != DBL_MIN_EXP - 2) + result |= 2; + } /* This test fails on NetBSD 7.1, OpenBSD 6.7. */ { x = 1.0 / zero; if (my_ilogb (x) != INT_MAX) - result |= 2; + result |= 4; } /* This test fails on NetBSD 7.1, OpenBSD 6.7. */ { x = zero / zero; if (my_ilogb (x) != FP_ILOGBNAN) - result |= 4; + result |= 8; } return result; } |