Piotr Caban : msvcrt: Import ceilf implementation from musl.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: bba43bd6dad0dd96ec547a6630cd34a4c80887df
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=bba43bd6dad0dd96ec547a6630cd34a4c80887df

Author: Piotr Caban <piotr at codeweavers.com>
Date:   Mon May 17 15:38:08 2021 +0200

msvcrt: Import ceilf implementation from musl.

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

---

 dlls/msvcrt/math.c    | 23 ++++++++++++++++++++++-
 dlls/msvcrt/unixlib.c |  9 ---------
 dlls/msvcrt/unixlib.h |  1 -
 3 files changed, 22 insertions(+), 11 deletions(-)

diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index a4dd61f881c..5502e2934e9 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -798,10 +798,31 @@ float CDECL tanhf( float x )
 
 /*********************************************************************
  *      ceilf (MSVCRT.@)
+ *
+ * Copied from musl: src/math/ceilf.c
  */
 float CDECL ceilf( float x )
 {
-  return unix_funcs->ceilf(x);
+    union {float f; UINT32 i;} u = {x};
+    int e = (int)(u.i >> 23 & 0xff) - 0x7f;
+    UINT32 m;
+
+    if (e >= 23)
+        return x;
+    if (e >= 0) {
+        m = 0x007fffff >> e;
+        if ((u.i & m) == 0)
+            return x;
+        if (u.i >> 31 == 0)
+            u.i += m;
+        u.i &= ~m;
+    } else {
+        if (u.i >> 31)
+            return -0.0;
+        else if (u.i << 1)
+            return 1.0;
+    }
+    return u.f;
 }
 
 /*********************************************************************
diff --git a/dlls/msvcrt/unixlib.c b/dlls/msvcrt/unixlib.c
index 9d9f86b7358..634ab6f1a4b 100644
--- a/dlls/msvcrt/unixlib.c
+++ b/dlls/msvcrt/unixlib.c
@@ -121,14 +121,6 @@ static float CDECL unix_atanhf(float x)
 #endif
 }
 
-/*********************************************************************
- *      ceilf
- */
-static float CDECL unix_ceilf( float x )
-{
-    return ceilf( x );
-}
-
 /*********************************************************************
  *      cos
  */
@@ -705,7 +697,6 @@ static const struct unix_funcs funcs =
     unix_asinhf,
     unix_atanh,
     unix_atanhf,
-    unix_ceilf,
     unix_cos,
     unix_cosf,
     unix_cosh,
diff --git a/dlls/msvcrt/unixlib.h b/dlls/msvcrt/unixlib.h
index 70d955d5e4f..472eb323850 100644
--- a/dlls/msvcrt/unixlib.h
+++ b/dlls/msvcrt/unixlib.h
@@ -29,7 +29,6 @@ struct unix_funcs
     float           (CDECL *asinhf)(float x);
     double          (CDECL *atanh)(double x);
     float           (CDECL *atanhf)(float x);
-    float           (CDECL *ceilf)(float x);
     double          (CDECL *cos)(double x);
     float           (CDECL *cosf)(float x);
     double          (CDECL *cosh)(double x);