Use floor functions not __floor functions in glibc libm.

Similar to the changes that were made to call sqrt functions directly
in glibc, instead of __ieee754_sqrt variants, so that the compiler
could inline them automatically without needing special inline
definitions in lots of math_private.h headers, this patch makes libm
code call floor functions directly instead of __floor variants,
removing the inlines / macros for x86_64 (SSE4.1) and powerpc
(POWER5).

The redirection used to ensure that __ieee754_sqrt does still get
called when the compiler doesn't inline a built-in function expansion
is refactored so it can be applied to other functions; the refactoring
is arranged so it's not limited to unary functions either (it would be
reasonable to use this mechanism for copysign - removing the inline in
math_private_calls.h but also eliminating unnecessary local PLT entry
use in the cases (powerpc soft-float and e500v1, for IBM long double)
where copysign calls don't get inlined).

The point of this change is that more architectures can get floor
calls inlined where they weren't previously (AArch64, for example),
without needing special inline definitions in their math_private.h,
and existing such definitions in math_private.h headers can be
removed.

Note that it's possible that in some cases an inline may be used where
an IFUNC call was previously used - this is the case on x86_64, for
example.  I think the direct calls to floor are still appropriate; if
there's any significant performance cost from inline SSE2 floor
instead of an IFUNC call ending up with SSE4.1 floor, that indicates
that either the function should be doing something else that's faster
than using floor at all, or it should itself have IFUNC variants, or
that the compiler choice of inlining for generic tuning should change
to allow for the possibility that, by not inlining, an SSE4.1 IFUNC
might be called at runtime - but not that glibc should avoid calling
floor internally.  (After all, all the same considerations would apply
to any user program calling floor, where it might either be inlined or
left as an out-of-line call allowing for a possible IFUNC.)

Tested for x86_64, and with build-many-glibcs.py.

	* include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ &&
	__FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (MATH_REDIRECT):
	New macro.
	[!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0)
	&& !NO_MATH_REDIRECT] (MATH_REDIRECT_LDBL): Likewise.
	[!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0)
	&& !NO_MATH_REDIRECT] (MATH_REDIRECT_F128): Likewise.
	[!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0)
	&& !NO_MATH_REDIRECT] (MATH_REDIRECT_UNARY_ARGS): Likewise.
	[!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0)
	&& !NO_MATH_REDIRECT] (sqrt): Redirect using MATH_REDIRECT.
	[!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0)
	&& !NO_MATH_REDIRECT] (floor): Likewise.
	* sysdeps/aarch64/fpu/s_floor.c: Define NO_MATH_REDIRECT before
	header inclusion.
	* sysdeps/aarch64/fpu/s_floorf.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_floor.c: Likewise.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c: Likewise.
	* sysdeps/ieee754/float128/s_floorf128.c: Likewise.
	* sysdeps/ieee754/flt-32/s_floorf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_floorl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_floorl.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/s_floor_template.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floor.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floorf.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_floor.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_floorf.c: Likewise.
	* sysdeps/riscv/rv64/rvd/s_floor.c: Likewise.
	* sysdeps/riscv/rvf/s_floorf.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_floor.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_floorf.c: Likewise.
	* sysdeps/powerpc/fpu/math_private.h [_ARCH_PWR5X] (__floor):
	Remove macro.
	[_ARCH_PWR5X] (__floorf): Likewise.
	* sysdeps/x86_64/fpu/math_private.h [__SSE4_1__] (__floor): Remove
	inline function.
	[__SSE4_1__] (__floorf): Likewise.
	* math/w_lgamma_main.c (LGFUNC (__lgamma)): Use floor functions
	instead of __floor variants.
	* math/w_lgamma_r_compat.c (__lgamma_r): Likewise.
	* math/w_lgammaf_main.c (LGFUNC (__lgammaf)): Likewise.
	* math/w_lgammaf_r_compat.c (__lgammaf_r): Likewise.
	* math/w_lgammal_main.c (LGFUNC (__lgammal)): Likewise.
	* math/w_lgammal_r_compat.c (__lgammal_r): Likewise.
	* math/w_tgamma_compat.c (__tgamma): Likewise.
	* math/w_tgamma_template.c (M_DECL_FUNC (__tgamma)): Likewise.
	* math/w_tgammaf_compat.c (__tgammaf): Likewise.
	* math/w_tgammal_compat.c (__tgammal): Likewise.
	* sysdeps/ieee754/dbl-64/e_lgamma_r.c (sin_pi): Likewise.
	* sysdeps/ieee754/dbl-64/k_rem_pio2.c (__kernel_rem_pio2):
	Likewise.
	* sysdeps/ieee754/dbl-64/lgamma_neg.c (__lgamma_neg): Likewise.
	* sysdeps/ieee754/flt-32/e_lgammaf_r.c (sin_pif): Likewise.
	* sysdeps/ieee754/flt-32/lgamma_negf.c (__lgamma_negf): Likewise.
	* sysdeps/ieee754/ldbl-128/e_lgammal_r.c (__ieee754_lgammal_r):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_powl.c (__ieee754_powl): Likewise.
	* sysdeps/ieee754/ldbl-128/lgamma_negl.c (__lgamma_negl):
	Likewise.
	* sysdeps/ieee754/ldbl-128/s_expm1l.c (__expm1l): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c (__ieee754_lgammal_r):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_powl.c (__ieee754_powl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/lgamma_negl.c (__lgamma_negl):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_expm1l.c (__expm1l): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_truncl.c (__truncl): Likewise.
	* sysdeps/ieee754/ldbl-96/e_lgammal_r.c (sin_pi): Likewise.
	* sysdeps/ieee754/ldbl-96/lgamma_negl.c (__lgamma_negl): Likewise.
	* sysdeps/powerpc/power5+/fpu/s_modf.c (__modf): Likewise.
	* sysdeps/powerpc/power5+/fpu/s_modff.c (__modff): Likewise.

22 files changed, 38 insertions, 32 deletions

diff --git a/sysdeps/ieee754/dbl-64/e_lgamma_r.c b/sysdeps/ieee754/dbl-64/e_lgamma_r.c
index 17717d9..88051bc 100644
--- a/sysdeps/ieee754/dbl-64/e_lgamma_r.c
+++ b/sysdeps/ieee754/dbl-64/e_lgamma_r.c
@@ -168,10 +168,10 @@ sin_pi(double x)
      * argument reduction, make sure inexact flag not raised if input
      * is an integer
      */
-	z = __floor(y);
+	z = floor(y);
 	if(z!=y) {				/* inexact anyway */
 	    y  *= 0.5;
-	    y   = 2.0*(y - __floor(y));		/* y = |x| mod 2.0 */
+	    y   = 2.0*(y - floor(y));		/* y = |x| mod 2.0 */
 	    n   = (int) (y*4.0);
 	} else {
 	    if(ix>=0x43400000) {
diff --git a/sysdeps/ieee754/dbl-64/k_rem_pio2.c b/sysdeps/ieee754/dbl-64/k_rem_pio2.c
index d8403dc..6221a1a 100644
--- a/sysdeps/ieee754/dbl-64/k_rem_pio2.c
+++ b/sysdeps/ieee754/dbl-64/k_rem_pio2.c
@@ -196,7 +196,7 @@ recompute:
 
   /* compute n */
   z = __scalbn (z, q0);                 /* actual value of z */
-  z -= 8.0 * __floor (z * 0.125);               /* trim off integer >= 8 */
+  z -= 8.0 * floor (z * 0.125);               /* trim off integer >= 8 */
   n = (int32_t) z;
   z -= (double) n;
   ih = 0;
diff --git a/sysdeps/ieee754/dbl-64/lgamma_neg.c b/sysdeps/ieee754/dbl-64/lgamma_neg.c
index eaa6f64..56a3fca 100644
--- a/sysdeps/ieee754/dbl-64/lgamma_neg.c
+++ b/sysdeps/ieee754/dbl-64/lgamma_neg.c
@@ -282,7 +282,7 @@ __lgamma_neg (double x, int *signgamp)
 {
   /* Determine the half-integer region X lies in, handle exact
      integers and determine the sign of the result.  */
-  int i = __floor (-2 * x);
+  int i = floor (-2 * x);
   if ((i & 1) == 0 && i == -2 * x)
     return 1.0 / 0.0;
   double xn = ((i & 1) == 0 ? -i / 2 : (-i - 1) / 2);
@@ -299,7 +299,7 @@ __lgamma_neg (double x, int *signgamp)
      approximations to an adjusted version of the gamma function.  */
   if (i < 2)
     {
-      int j = __floor (-8 * x) - 16;
+      int j = floor (-8 * x) - 16;
       double xm = (-33 - 2 * j) * 0.0625;
       double x_adj = x - xm;
       size_t deg = poly_deg[j];
diff --git a/sysdeps/ieee754/dbl-64/s_floor.c b/sysdeps/ieee754/dbl-64/s_floor.c
index f27c6f3..bebc018 100644
--- a/sysdeps/ieee754/dbl-64/s_floor.c
+++ b/sysdeps/ieee754/dbl-64/s_floor.c
@@ -17,6 +17,7 @@
  *	Bit twiddling.
  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <math_private.h>
 #include <libm-alias-double.h>
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c
index f7e0a77..44c1e19 100644
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c
+++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c
@@ -30,6 +30,7 @@
  * ====================================================
  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <math_private.h>
 #include <stdint.h>
diff --git a/sysdeps/ieee754/float128/s_floorf128.c b/sysdeps/ieee754/float128/s_floorf128.c
index 1829843..e0a6412 100644
--- a/sysdeps/ieee754/float128/s_floorf128.c
+++ b/sysdeps/ieee754/float128/s_floorf128.c
@@ -1,2 +1,3 @@
+#define NO_MATH_REDIRECT
 #include <float128_private.h>
 #include "../ldbl-128/s_floorl.c"
diff --git a/sysdeps/ieee754/flt-32/e_lgammaf_r.c b/sysdeps/ieee754/flt-32/e_lgammaf_r.c
index ebe2d34..a7f9b9f 100644
--- a/sysdeps/ieee754/flt-32/e_lgammaf_r.c
+++ b/sysdeps/ieee754/flt-32/e_lgammaf_r.c
@@ -104,10 +104,10 @@ sin_pif(float x)
      * argument reduction, make sure inexact flag not raised if input
      * is an integer
      */
-	z = __floorf(y);
+	z = floorf(y);
 	if(z!=y) {				/* inexact anyway */
 	    y  *= (float)0.5;
-	    y   = (float)2.0*(y - __floorf(y));	/* y = |x| mod 2.0 */
+	    y   = (float)2.0*(y - floorf(y));	/* y = |x| mod 2.0 */
 	    n   = (int) (y*(float)4.0);
 	} else {
 	    if(ix>=0x4b800000) {
diff --git a/sysdeps/ieee754/flt-32/lgamma_negf.c b/sysdeps/ieee754/flt-32/lgamma_negf.c
index 7951cde..c20b816 100644
--- a/sysdeps/ieee754/flt-32/lgamma_negf.c
+++ b/sysdeps/ieee754/flt-32/lgamma_negf.c
@@ -197,7 +197,7 @@ __lgamma_negf (float x, int *signgamp)
 {
   /* Determine the half-integer region X lies in, handle exact
      integers and determine the sign of the result.  */
-  int i = __floorf (-2 * x);
+  int i = floorf (-2 * x);
   if ((i & 1) == 0 && i == -2 * x)
     return 1.0f / 0.0f;
   float xn = ((i & 1) == 0 ? -i / 2 : (-i - 1) / 2);
@@ -214,7 +214,7 @@ __lgamma_negf (float x, int *signgamp)
      approximations to an adjusted version of the gamma function.  */
   if (i < 2)
     {
-      int j = __floorf (-8 * x) - 16;
+      int j = floorf (-8 * x) - 16;
       float xm = (-33 - 2 * j) * 0.0625f;
       float x_adj = x - xm;
       size_t deg = poly_deg[j];
diff --git a/sysdeps/ieee754/flt-32/s_floorf.c b/sysdeps/ieee754/flt-32/s_floorf.c
index 12aed34..b34d967 100644
--- a/sysdeps/ieee754/flt-32/s_floorf.c
+++ b/sysdeps/ieee754/flt-32/s_floorf.c
@@ -20,6 +20,7 @@
  *	Bit twiddling.
  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <math_private.h>
 #include <libm-alias-float.h>
diff --git a/sysdeps/ieee754/ldbl-128/e_lgammal_r.c b/sysdeps/ieee754/ldbl-128/e_lgammal_r.c
index 5c50e46..f470034 100644
--- a/sysdeps/ieee754/ldbl-128/e_lgammal_r.c
+++ b/sysdeps/ieee754/ldbl-128/e_lgammal_r.c
@@ -776,11 +776,11 @@ __ieee754_lgammal_r (_Float128 x, int *signgamp)
       if (x < -2 && x > -50)
 	return __lgamma_negl (x, signgamp);
       q = -x;
-      p = __floorl (q);
+      p = floorl (q);
       if (p == q)
 	return (one / fabsl (p - p));
       _Float128 halfp = p * L(0.5);
-      if (halfp == __floorl (halfp))
+      if (halfp == floorl (halfp))
 	*signgamp = -1;
       else
 	*signgamp = 1;
@@ -801,7 +801,7 @@ __ieee754_lgammal_r (_Float128 x, int *signgamp)
   if (x < L(13.5))
     {
       p = 0;
-      nx = __floorl (x + L(0.5));
+      nx = floorl (x + L(0.5));
       nn = nx;
       switch (nn)
 	{
diff --git a/sysdeps/ieee754/ldbl-128/e_powl.c b/sysdeps/ieee754/ldbl-128/e_powl.c
index dc748c3..47226f8 100644
--- a/sysdeps/ieee754/ldbl-128/e_powl.c
+++ b/sysdeps/ieee754/ldbl-128/e_powl.c
@@ -198,10 +198,10 @@ __ieee754_powl (_Float128 x, _Float128 y)
 	yisint = 2;		/* even integer y */
       else if (iy >= 0x3fff0000)	/* 1.0 */
 	{
-	  if (__floorl (y) == y)
+	  if (floorl (y) == y)
 	    {
 	      z = 0.5 * y;
-	      if (__floorl (z) == z)
+	      if (floorl (z) == z)
 		yisint = 2;
 	      else
 		yisint = 1;
@@ -413,7 +413,7 @@ __ieee754_powl (_Float128 x, _Float128 y)
   n = 0;
   if (i > 0x3ffe0000)
     {				/* if |z| > 0.5, set n = [z+0.5] */
-      n = __floorl (z + L(0.5));
+      n = floorl (z + L(0.5));
       t = n;
       p_h -= t;
     }
diff --git a/sysdeps/ieee754/ldbl-128/lgamma_negl.c b/sysdeps/ieee754/ldbl-128/lgamma_negl.c
index cb64d4b..c0bf166 100644
--- a/sysdeps/ieee754/ldbl-128/lgamma_negl.c
+++ b/sysdeps/ieee754/ldbl-128/lgamma_negl.c
@@ -449,7 +449,7 @@ __lgamma_negl (_Float128 x, int *signgamp)
 {
   /* Determine the half-integer region X lies in, handle exact
      integers and determine the sign of the result.  */
-  int i = __floorl (-2 * x);
+  int i = floorl (-2 * x);
   if ((i & 1) == 0 && i == -2 * x)
     return L(1.0) / L(0.0);
   _Float128 xn = ((i & 1) == 0 ? -i / 2 : (-i - 1) / 2);
@@ -466,7 +466,7 @@ __lgamma_negl (_Float128 x, int *signgamp)
      approximations to an adjusted version of the gamma function.  */
   if (i < 2)
     {
-      int j = __floorl (-8 * x) - 16;
+      int j = floorl (-8 * x) - 16;
       _Float128 xm = (-33 - 2 * j) * L(0.0625);
       _Float128 x_adj = x - xm;
       size_t deg = poly_deg[j];
diff --git a/sysdeps/ieee754/ldbl-128/s_expm1l.c b/sysdeps/ieee754/ldbl-128/s_expm1l.c
index 66881af..08f9ec8 100644
--- a/sysdeps/ieee754/ldbl-128/s_expm1l.c
+++ b/sysdeps/ieee754/ldbl-128/s_expm1l.c
@@ -136,7 +136,7 @@ __expm1l (_Float128 x)
 
   /* Express x = ln 2 (k + remainder), remainder not exceeding 1/2. */
   xx = C1 + C2;			/* ln 2. */
-  px = __floorl (0.5 + x / xx);
+  px = floorl (0.5 + x / xx);
   k = px;
   /* remainder times ln 2 */
   x -= px * C1;
diff --git a/sysdeps/ieee754/ldbl-128/s_floorl.c b/sysdeps/ieee754/ldbl-128/s_floorl.c
index f9c5e01..f340a3f 100644
--- a/sysdeps/ieee754/ldbl-128/s_floorl.c
+++ b/sysdeps/ieee754/ldbl-128/s_floorl.c
@@ -24,6 +24,7 @@ static char rcsid[] = "$NetBSD: $";
  *	Bit twiddling.
  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <math_private.h>
 #include <libm-alias-ldouble.h>
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c b/sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c
index 5b628be..ae2e655 100644
--- a/sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c
+++ b/sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c
@@ -726,11 +726,11 @@ __ieee754_lgammal_r (long double x, int *signgamp)
       if (x < -2 && x > -48)
 	return __lgamma_negl (x, signgamp);
       q = -x;
-      p = __floorl (q);
+      p = floorl (q);
       if (p == q)
 	return (one / fabsl (p - p));
       long double halfp = p * 0.5L;
-      if (halfp == __floorl (halfp))
+      if (halfp == floorl (halfp))
 	*signgamp = -1;
       else
 	*signgamp = 1;
@@ -751,7 +751,7 @@ __ieee754_lgammal_r (long double x, int *signgamp)
   if (x < 13.5L)
     {
       p = 0;
-      nx = __floorl (x + 0.5L);
+      nx = floorl (x + 0.5L);
       nn = nx;
       switch (nn)
 	{
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_powl.c b/sysdeps/ieee754/ldbl-128ibm/e_powl.c
index f59ad4e..1f0f2b4 100644
--- a/sysdeps/ieee754/ldbl-128ibm/e_powl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/e_powl.c
@@ -195,10 +195,10 @@ __ieee754_powl (long double x, long double y)
 	yisint = 2;		/* even integer y */
       else if (iy >= 0x3ff00000)	/* 1.0 */
 	{
-	  if (__floorl (y) == y)
+	  if (floorl (y) == y)
 	    {
 	      z = 0.5 * y;
-	      if (__floorl (z) == z)
+	      if (floorl (z) == z)
 		yisint = 2;
 	      else
 		yisint = 1;
@@ -392,7 +392,7 @@ __ieee754_powl (long double x, long double y)
   n = 0;
   if (i > 0x3fe00000)
     {				/* if |z| > 0.5, set n = [z+0.5] */
-      n = __floorl (z + 0.5L);
+      n = floorl (z + 0.5L);
       t = n;
       p_h -= t;
     }
diff --git a/sysdeps/ieee754/ldbl-128ibm/lgamma_negl.c b/sysdeps/ieee754/ldbl-128ibm/lgamma_negl.c
index c96b641..c359657 100644
--- a/sysdeps/ieee754/ldbl-128ibm/lgamma_negl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/lgamma_negl.c
@@ -430,7 +430,7 @@ __lgamma_negl (long double x, int *signgamp)
 {
   /* Determine the half-integer region X lies in, handle exact
      integers and determine the sign of the result.  */
-  int i = __floorl (-2 * x);
+  int i = floorl (-2 * x);
   if ((i & 1) == 0 && i == -2 * x)
     return 1.0L / 0.0L;
   long double xn = ((i & 1) == 0 ? -i / 2 : (-i - 1) / 2);
@@ -447,7 +447,7 @@ __lgamma_negl (long double x, int *signgamp)
      approximations to an adjusted version of the gamma function.  */
   if (i < 2)
     {
-      int j = __floorl (-8 * x) - 16;
+      int j = floorl (-8 * x) - 16;
       long double xm = (-33 - 2 * j) * 0.0625L;
       long double x_adj = x - xm;
       size_t deg = poly_deg[j];
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_expm1l.c b/sysdeps/ieee754/ldbl-128ibm/s_expm1l.c
index 42d57c6..22abee4 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_expm1l.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_expm1l.c
@@ -120,7 +120,7 @@ __expm1l (long double x)
 
   /* Express x = ln 2 (k + remainder), remainder not exceeding 1/2. */
   xx = C1 + C2;			/* ln 2. */
-  px = __floorl (0.5 + x / xx);
+  px = floorl (0.5 + x / xx);
   k = px;
   /* remainder times ln 2 */
   x -= px * C1;
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_floorl.c b/sysdeps/ieee754/ldbl-128ibm/s_floorl.c
index 4aae5ae..f33b6ad 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_floorl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_floorl.c
@@ -17,6 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <math_private.h>
 #include <math_ldbl_opt.h>
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_truncl.c b/sysdeps/ieee754/ldbl-128ibm/s_truncl.c
index a915a01..a366c42 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_truncl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_truncl.c
@@ -47,7 +47,7 @@ __truncl (long double x)
       else
 	{
 	  /* The high part is a nonzero integer.  */
-	  lo = xh > 0 ? __floor (xl) : __ceil (xl);
+	  lo = xh > 0 ? floor (xl) : __ceil (xl);
 	  xh = hi;
 	  xl = lo;
 	  ldbl_canonicalize_int (&xh, &xl);
diff --git a/sysdeps/ieee754/ldbl-96/e_lgammal_r.c b/sysdeps/ieee754/ldbl-96/e_lgammal_r.c
index 200421f..a5d6d0d 100644
--- a/sysdeps/ieee754/ldbl-96/e_lgammal_r.c
+++ b/sysdeps/ieee754/ldbl-96/e_lgammal_r.c
@@ -221,11 +221,11 @@ sin_pi (long double x)
    * argument reduction, make sure inexact flag not raised if input
    * is an integer
    */
-  z = __floorl (y);
+  z = floorl (y);
   if (z != y)
     {				/* inexact anyway */
       y  *= 0.5;
-      y = 2.0*(y - __floorl(y));		/* y = |x| mod 2.0 */
+      y = 2.0*(y - floorl(y));		/* y = |x| mod 2.0 */
       n = (int) (y*4.0);
     }
   else
diff --git a/sysdeps/ieee754/ldbl-96/lgamma_negl.c b/sysdeps/ieee754/ldbl-96/lgamma_negl.c
index 90bb834..eaa41d6 100644
--- a/sysdeps/ieee754/ldbl-96/lgamma_negl.c
+++ b/sysdeps/ieee754/ldbl-96/lgamma_negl.c
@@ -316,7 +316,7 @@ __lgamma_negl (long double x, int *signgamp)
 {
   /* Determine the half-integer region X lies in, handle exact
      integers and determine the sign of the result.  */
-  int i = __floorl (-2 * x);
+  int i = floorl (-2 * x);
   if ((i & 1) == 0 && i == -2 * x)
     return 1.0L / 0.0L;
   long double xn = ((i & 1) == 0 ? -i / 2 : (-i - 1) / 2);
@@ -333,7 +333,7 @@ __lgamma_negl (long double x, int *signgamp)
      approximations to an adjusted version of the gamma function.  */
   if (i < 2)
     {
-      int j = __floorl (-8 * x) - 16;
+      int j = floorl (-8 * x) - 16;
       long double xm = (-33 - 2 * j) * 0.0625L;
       long double x_adj = x - xm;
       size_t deg = poly_deg[j];