diff options
| author | Bruno Haible <bruno@clisp.org> | 2011-10-15 13:20:29 +0200 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2011-10-15 13:20:29 +0200 |
| commit | 8f9c414718161f157f9970b3c97b977d0343093e (patch) | |
| tree | 0575eef60cadb5f33789b18daa5e25d476691dc1 /m4 | |
| parent | 3e89323b7976e230cc01744c046b825d049c7fa6 (diff) | |
| download | gnulib-8f9c414718161f157f9970b3c97b977d0343093e.tar.gz | |
vasnprintf: Optimize bit search operation.
* lib/vasnprintf.c (divide): Use optimizations from integer_length.c.
* m4/vasnprintf.m4 (gl_PREREQ_VASNPRINTF): Require
gl_DOUBLE_EXPONENT_LOCATION.
* modules/vasnprintf (Files): Add m4/exponentd.m4.
* modules/unistdio/u8-vasnprintf (Files): Likewise.
* modules/unistdio/u8-u8-vasnprintf (Files): Likewise.
* modules/unistdio/u16-vasnprintf (Files): Likewise.
* modules/unistdio/u16-u16-vasnprintf (Files): Likewise.
* modules/unistdio/u32-vasnprintf (Files): Likewise.
* modules/unistdio/u32-u32-vasnprintf (Files): Likewise.
* modules/unistdio/ulc-vasnprintf (Files): Likewise.
* m4/isnand.m4 (gl_PREREQ_ISNAND): Use AC_REQUIRE.
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/isnand.m4 | 4 | ||||
| -rw-r--r-- | m4/vasnprintf.m4 | 5 |
2 files changed, 6 insertions, 3 deletions
diff --git a/m4/isnand.m4 b/m4/isnand.m4 index 2b18b0ac6d..48f1a48078 100644 --- a/m4/isnand.m4 +++ b/m4/isnand.m4 @@ -1,4 +1,4 @@ -# isnand.m4 serial 10 +# isnand.m4 serial 11 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -43,7 +43,7 @@ AC_DEFUN([gl_FUNC_ISNAND_NO_LIBM], dnl Prerequisites of replacement isnand definition. It does not need -lm. AC_DEFUN([gl_PREREQ_ISNAND], [ - gl_DOUBLE_EXPONENT_LOCATION + AC_REQUIRE([gl_DOUBLE_EXPONENT_LOCATION]) ]) dnl Test whether isnand() can be used with libm. diff --git a/m4/vasnprintf.m4 b/m4/vasnprintf.m4 index 749d708d9e..da0a6d9efc 100644 --- a/m4/vasnprintf.m4 +++ b/m4/vasnprintf.m4 @@ -1,4 +1,4 @@ -# vasnprintf.m4 serial 33 +# vasnprintf.m4 serial 34 dnl Copyright (C) 2002-2004, 2006-2011 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -64,6 +64,9 @@ AC_DEFUN_ONCE([gl_PREREQ_VASNPRINTF], dnl Use the _snprintf function only if it is declared (because on NetBSD it dnl is defined as a weak alias of snprintf; we prefer to use the latter). AC_CHECK_DECLS([_snprintf], , , [[#include <stdio.h>]]) + dnl Knowing DBL_EXPBIT0_WORD and DBL_EXPBIT0_BIT enables an optimization + dnl in the code for NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_DOUBLE. + AC_REQUIRE([gl_DOUBLE_EXPONENT_LOCATION]) dnl We can avoid a lot of code by assuming that snprintf's return value dnl conforms to ISO C99. So check that. AC_REQUIRE([gl_SNPRINTF_RETVAL_C99]) |