msvcrt: Import log2 implementation from musl.

Signed-off-by: Piotr Caban <piotr@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

msvcrt: Import log2 implementation from musl.
7e6756d0 · Piotr Caban · Alexandre Julliard · 301bde60 · 7e6756d0 · 7e6756d0
Commit 7e6756d0 authored Jun 04, 2021 by Piotr Caban Committed by Alexandre Julliard Jun 04, 2021
6 changed files
--- a/configure
+++ b/configure
@@ -19622,7 +19622,6 @@ for ac_func in \
 	fmaf \
 	lgamma \
 	lgammaf \
-	log2 \
 	tgamma \
 	tgammaf


--- a/configure.ac
+++ b/configure.ac
@@ -2661,7 +2661,6 @@ AC_CHECK_FUNCS(\
 	fmaf \
 	lgamma \
 	lgammaf \
-	log2 \
 	tgamma \
 	tgammaf
 )

--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
--- a/dlls/msvcrt/unixlib.c
+++ b/dlls/msvcrt/unixlib.c
@@ -121,18 +121,6 @@ static float CDECL unix_lgammaf(float x)
 }

 /*********************************************************************
- *      log2
- */
-static double CDECL unix_log2(double x)
-{
-#ifdef HAVE_LOG2
-    return log2(x);
-#else
-    return log(x) / log(2);
-#endif
-}
-
-/*********************************************************************
 *      pow
 */
 static double CDECL unix_pow( double x, double y )
@@ -183,7 +171,6 @@ static const struct unix_funcs funcs =
    unix_fmaf,
    unix_lgamma,
    unix_lgammaf,
-    unix_log2,
    unix_pow,
    unix_powf,
    unix_tgamma,

--- a/dlls/msvcrt/unixlib.h
+++ b/dlls/msvcrt/unixlib.h
@@ -30,7 +30,6 @@ struct unix_funcs
    float           (CDECL *fmaf)(float x, float y, float z);
    double          (CDECL *lgamma)(double x);
    float           (CDECL *lgammaf)(float x);
-    double          (CDECL *log2)(double x);
    double          (CDECL *pow)(double x, double y);
    float           (CDECL *powf)(float x, float y);
    double          (CDECL *tgamma)(double x);

--- a/include/config.h.in
+++ b/include/config.h.in
@@ -408,9 +408,6 @@
 /* Define to 1 if you have the <linux/videodev2.h> header file. */
 #undef HAVE_LINUX_VIDEODEV2_H

-/* Define to 1 if you have the `log2' function. */
-#undef HAVE_LOG2
-
 /* Define to 1 if you have the `lstat' function. */
 #undef HAVE_LSTAT