Use trunc functions not __trunc functions in glibc libm.

Continuing the move to use, within libm, public names for libm
functions that can be inlined as built-in functions on many
architectures, this patch moves calls to __trunc functions to call the
corresponding trunc names instead, with asm redirection to __trunc
when the calls are not inlined.

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

	* include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ &&
	__FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (trunc): Redirect
	using MATH_REDIRECT.
	* sysdeps/aarch64/fpu/s_trunc.c: Define NO_MATH_REDIRECT before
	header inclusion.
	* sysdeps/aarch64/fpu/s_truncf.c: Likewise.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c: Likewise.
	* sysdeps/ieee754/float128/s_truncf128.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_trunc.c: Likewise.
	* sysdeps/ieee754/flt-32/s_truncf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_truncl.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_trunc.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_truncf.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_trunc.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_truncf.c: Likewise.
	* sysdeps/riscv/rv64/rvd/s_trunc.c: Likewise.
	* sysdeps/riscv/rvf/s_truncf.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_trunc.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_truncf.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/s_trunc_template.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_truncl.c: Likewise.
	(ceil): Redirect to __ceil.
	(floor): Redirect to __floor.
	(trunc): Redirect to __trunc.
	(__truncl): Call trunc instead of __trunc.
	* sysdeps/powerpc/fpu/math_private.h [_ARCH_PWR5X] (__trunc):
	Remove macro.
	[_ARCH_PWR5X] (__truncf): Likewise.
	* sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r): Use
	trunc functions instead of __trunc variants.
	* sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r):
	Likewise.
	* sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r):
	Likewise.

27 files changed, 76 insertions, 31 deletions

diff --git a/ChangeLog b/ChangeLog
index fc3fbffa23..dfb9dc156b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,46 @@
 2018-09-20  Joseph Myers  <joseph@codesourcery.com>
 
+	* include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ &&
+	__FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (trunc): Redirect
+	using MATH_REDIRECT.
+	* sysdeps/aarch64/fpu/s_trunc.c: Define NO_MATH_REDIRECT before
+	header inclusion.
+	* sysdeps/aarch64/fpu/s_truncf.c: Likewise.
+	* sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c: Likewise.
+	* sysdeps/ieee754/float128/s_truncf128.c: Likewise.
+	* sysdeps/ieee754/dbl-64/s_trunc.c: Likewise.
+	* sysdeps/ieee754/flt-32/s_truncf.c: Likewise.
+	* sysdeps/ieee754/ldbl-128/s_truncl.c: Likewise.
+	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_trunc.c: Likewise.
+	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_truncf.c: Likewise.
+	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_trunc.c: Likewise.
+	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_truncf.c: Likewise.
+	* sysdeps/riscv/rv64/rvd/s_trunc.c: Likewise.
+	* sysdeps/riscv/rvf/s_truncf.c: Likewise.
+	* sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c: Likewise.
+	* sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c: Likewise.
+	* sysdeps/x86_64/fpu/multiarch/s_trunc.c: Likewise.
+	* sysdeps/x86_64/fpu/multiarch/s_truncf.c: Likewise.
+	* sysdeps/m68k/m680x0/fpu/s_trunc_template.c: Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/s_truncl.c: Likewise.
+	(ceil): Redirect to __ceil.
+	(floor): Redirect to __floor.
+	(trunc): Redirect to __trunc.
+	(__truncl): Call trunc instead of __trunc.
+	* sysdeps/powerpc/fpu/math_private.h [_ARCH_PWR5X] (__trunc):
+	Remove macro.
+	[_ARCH_PWR5X] (__truncf): Likewise.
+	* sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r): Use
+	trunc functions instead of __trunc variants.
+	* sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r):
+	Likewise.
+	* sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r):
+	Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r):
+	Likewise.
+	* sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r):
+	Likewise.
+
 	* sysdeps/x86/cpu-features.h [__geode__ || __k6__]: Handle like
 	[__i586__ || __pentium__].
 	[__i486__]: Handle explicitly.
diff --git a/include/math.h b/include/math.h
index e96f971257..f8482afc44 100644
--- a/include/math.h
+++ b/include/math.h
@@ -104,6 +104,7 @@ MATH_REDIRECT (sqrt, "__ieee754_", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (ceil, "__", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (floor, "__", MATH_REDIRECT_UNARY_ARGS)
 MATH_REDIRECT (rint, "__", MATH_REDIRECT_UNARY_ARGS)
+MATH_REDIRECT (trunc, "__", MATH_REDIRECT_UNARY_ARGS)
 #  endif
 # endif
 
diff --git a/sysdeps/aarch64/fpu/s_trunc.c b/sysdeps/aarch64/fpu/s_trunc.c
index 22f44f1e04..929448edd0 100644
--- a/sysdeps/aarch64/fpu/s_trunc.c
+++ b/sysdeps/aarch64/fpu/s_trunc.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <libm-alias-double.h>
 
diff --git a/sysdeps/aarch64/fpu/s_truncf.c b/sysdeps/aarch64/fpu/s_truncf.c
index 3771b6d6bf..242ea773d1 100644
--- a/sysdeps/aarch64/fpu/s_truncf.c
+++ b/sysdeps/aarch64/fpu/s_truncf.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <libm-alias-float.h>
 
diff --git a/sysdeps/ieee754/dbl-64/e_gamma_r.c b/sysdeps/ieee754/dbl-64/e_gamma_r.c
index 823ffdbced..2cfe6d640e 100644
--- a/sysdeps/ieee754/dbl-64/e_gamma_r.c
+++ b/sysdeps/ieee754/dbl-64/e_gamma_r.c
@@ -173,8 +173,8 @@ __ieee754_gamma_r (double x, int *signgamp)
 	}
       else
 	{
-	  double tx = __trunc (x);
-	  *signgamp = (tx == 2.0 * __trunc (tx / 2.0)) ? -1 : 1;
+	  double tx = trunc (x);
+	  *signgamp = (tx == 2.0 * trunc (tx / 2.0)) ? -1 : 1;
 	  if (x <= -184.0)
 	    /* Underflow.  */
 	    ret = DBL_MIN * DBL_MIN;
diff --git a/sysdeps/ieee754/dbl-64/s_trunc.c b/sysdeps/ieee754/dbl-64/s_trunc.c
index 6ffabb410a..d9894b2beb 100644
--- a/sysdeps/ieee754/dbl-64/s_trunc.c
+++ b/sysdeps/ieee754/dbl-64/s_trunc.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>
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c
index 19a09b894e..f7e22552b3 100644
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c
+++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.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>
diff --git a/sysdeps/ieee754/float128/s_truncf128.c b/sysdeps/ieee754/float128/s_truncf128.c
index 474d9dc77e..5786cfe4c0 100644
--- a/sysdeps/ieee754/float128/s_truncf128.c
+++ b/sysdeps/ieee754/float128/s_truncf128.c
@@ -1,2 +1,3 @@
+#define NO_MATH_REDIRECT
 #include <float128_private.h>
 #include "../ldbl-128/s_truncl.c"
diff --git a/sysdeps/ieee754/flt-32/e_gammaf_r.c b/sysdeps/ieee754/flt-32/e_gammaf_r.c
index 68f8f44c65..7d9a6cbac4 100644
--- a/sysdeps/ieee754/flt-32/e_gammaf_r.c
+++ b/sysdeps/ieee754/flt-32/e_gammaf_r.c
@@ -165,8 +165,8 @@ __ieee754_gammaf_r (float x, int *signgamp)
 	}
       else
 	{
-	  float tx = __truncf (x);
-	  *signgamp = (tx == 2.0f * __truncf (tx / 2.0f)) ? -1 : 1;
+	  float tx = truncf (x);
+	  *signgamp = (tx == 2.0f * truncf (tx / 2.0f)) ? -1 : 1;
 	  if (x <= -42.0f)
 	    /* Underflow.  */
 	    ret = FLT_MIN * FLT_MIN;
diff --git a/sysdeps/ieee754/flt-32/s_truncf.c b/sysdeps/ieee754/flt-32/s_truncf.c
index 2e1464aeac..7ef067e0b5 100644
--- a/sysdeps/ieee754/flt-32/s_truncf.c
+++ b/sysdeps/ieee754/flt-32/s_truncf.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>
diff --git a/sysdeps/ieee754/ldbl-128/e_gammal_r.c b/sysdeps/ieee754/ldbl-128/e_gammal_r.c
index f620463ef9..184798fb54 100644
--- a/sysdeps/ieee754/ldbl-128/e_gammal_r.c
+++ b/sysdeps/ieee754/ldbl-128/e_gammal_r.c
@@ -179,8 +179,8 @@ __ieee754_gammal_r (_Float128 x, int *signgamp)
 	}
       else
 	{
-	  _Float128 tx = __truncl (x);
-	  *signgamp = (tx == 2 * __truncl (tx / 2)) ? -1 : 1;
+	  _Float128 tx = truncl (x);
+	  *signgamp = (tx == 2 * truncl (tx / 2)) ? -1 : 1;
 	  if (x <= -1775)
 	    /* Underflow.  */
 	    ret = LDBL_MIN * LDBL_MIN;
diff --git a/sysdeps/ieee754/ldbl-128/s_truncl.c b/sysdeps/ieee754/ldbl-128/s_truncl.c
index f858ede3d2..2dc01e70fd 100644
--- a/sysdeps/ieee754/ldbl-128/s_truncl.c
+++ b/sysdeps/ieee754/ldbl-128/s_truncl.c
@@ -18,6 +18,7 @@
    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>
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c b/sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c
index c1e0efa5e1..36801213d4 100644
--- a/sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c
+++ b/sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c
@@ -179,8 +179,8 @@ __ieee754_gammal_r (long double x, int *signgamp)
 	}
       else
 	{
-	  long double tx = __truncl (x);
-	  *signgamp = (tx == 2.0L * __truncl (tx / 2.0L)) ? -1 : 1;
+	  long double tx = truncl (x);
+	  *signgamp = (tx == 2.0L * truncl (tx / 2.0L)) ? -1 : 1;
 	  if (x <= -191.0L)
 	    /* Underflow.  */
 	    ret = LDBL_MIN * LDBL_MIN;
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_truncl.c b/sysdeps/ieee754/ldbl-128ibm/s_truncl.c
index 9646567883..3d658d32fe 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_truncl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_truncl.c
@@ -17,12 +17,17 @@
    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>
 #include <float.h>
 #include <ieee754.h>
 
+double ceil (double) asm ("__ceil");
+double floor (double) asm ("__floor");
+double trunc (double) asm ("__trunc");
+
 
 long double
 __truncl (long double x)
@@ -36,7 +41,7 @@ __truncl (long double x)
 			&& __builtin_isless (__builtin_fabs (xh),
 					     __builtin_inf ()), 1))
     {
-      hi = __trunc (xh);
+      hi = trunc (xh);
       if (hi != xh)
 	{
 	  /* The high part is not an integer; the low part does not
diff --git a/sysdeps/ieee754/ldbl-96/e_gammal_r.c b/sysdeps/ieee754/ldbl-96/e_gammal_r.c
index addb60d748..b0970335b9 100644
--- a/sysdeps/ieee754/ldbl-96/e_gammal_r.c
+++ b/sysdeps/ieee754/ldbl-96/e_gammal_r.c
@@ -171,8 +171,8 @@ __ieee754_gammal_r (long double x, int *signgamp)
 	}
       else
 	{
-	  long double tx = __truncl (x);
-	  *signgamp = (tx == 2.0L * __truncl (tx / 2.0L)) ? -1 : 1;
+	  long double tx = truncl (x);
+	  *signgamp = (tx == 2.0L * truncl (tx / 2.0L)) ? -1 : 1;
 	  if (x <= -1766.0L)
 	    /* Underflow.  */
 	    ret = LDBL_MIN * LDBL_MIN;
diff --git a/sysdeps/m68k/m680x0/fpu/s_trunc_template.c b/sysdeps/m68k/m680x0/fpu/s_trunc_template.c
index 39a6822cfb..7dc534f9c2 100644
--- a/sysdeps/m68k/m680x0/fpu/s_trunc_template.c
+++ b/sysdeps/m68k/m680x0/fpu/s_trunc_template.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library.  If not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 
 FLOAT
diff --git a/sysdeps/powerpc/fpu/math_private.h b/sysdeps/powerpc/fpu/math_private.h
index b71278ade4..7f2acbb833 100644
--- a/sysdeps/powerpc/fpu/math_private.h
+++ b/sysdeps/powerpc/fpu/math_private.h
@@ -57,26 +57,6 @@ __ieee754_sqrtf128 (_Float128 __x)
      __z; })
 # endif
 
-# ifndef __trunc
-#  define __trunc(x)			\
-    ({ double __z;			\
-     __asm __volatile (			\
-	"	friz %0,%1\n"		\
-		: "=f" (__z)		\
-		: "f" (x));		\
-     __z; })
-# endif
-# ifndef __truncf
-#  define __truncf(x)			\
-    ({ float __z;			\
-     __asm __volatile (			\
-	"	friz %0,%1\n"		\
-	"	frsp %0,%0\n"		\
-		: "=f" (__z)		\
-		: "f" (x));		\
-     __z; })
-# endif
-
 #endif	/* defined _ARCH_PWR5X */
 
 #endif /* _PPC_MATH_PRIVATE_H_ */
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_trunc.c b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_trunc.c
index 5712d6a3b2..eef0db6c2b 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_trunc.c
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_trunc.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <math_ldbl_opt.h>
 #include <shlib-compat.h>
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_truncf.c b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_truncf.c
index d5d72b52fe..4943b2d23d 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_truncf.c
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_truncf.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <math_ldbl_opt.h>
 #include <shlib-compat.h>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_trunc.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_trunc.c
index 989ffc9cf4..5a720d8fcb 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_trunc.c
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_trunc.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <math_ldbl_opt.h>
 #include <shlib-compat.h>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_truncf.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_truncf.c
index fc5351b0ca..3869c42fe0 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_truncf.c
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_truncf.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <math.h>
 #include <math_ldbl_opt.h>
 #include <shlib-compat.h>
diff --git a/sysdeps/riscv/rv64/rvd/s_trunc.c b/sysdeps/riscv/rv64/rvd/s_trunc.c
index ec28090ca0..ab755b7679 100644
--- a/sysdeps/riscv/rv64/rvd/s_trunc.c
+++ b/sysdeps/riscv/rv64/rvd/s_trunc.c
@@ -16,6 +16,7 @@
    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 <fenv_private.h>
diff --git a/sysdeps/riscv/rvf/s_truncf.c b/sysdeps/riscv/rvf/s_truncf.c
index ad5c2e217c..0c90092a4a 100644
--- a/sysdeps/riscv/rvf/s_truncf.c
+++ b/sysdeps/riscv/rvf/s_truncf.c
@@ -16,6 +16,7 @@
    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 <fenv_private.h>
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c b/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c
index 82ad6ffcca..73b0b559a9 100644
--- a/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c
+++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <sparc-ifunc.h>
 #include <math.h>
 #include <libm-alias-double.h>
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c b/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c
index 1c7a4a038f..8098f569e6 100644
--- a/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c
+++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <sparc-ifunc.h>
 #include <math.h>
 #include <libm-alias-float.h>
diff --git a/sysdeps/x86_64/fpu/multiarch/s_trunc.c b/sysdeps/x86_64/fpu/multiarch/s_trunc.c
index a1b0c60630..e606e040d5 100644
--- a/sysdeps/x86_64/fpu/multiarch/s_trunc.c
+++ b/sysdeps/x86_64/fpu/multiarch/s_trunc.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <libm-alias-double.h>
 
 #define trunc __redirect_trunc
diff --git a/sysdeps/x86_64/fpu/multiarch/s_truncf.c b/sysdeps/x86_64/fpu/multiarch/s_truncf.c
index a7e220bd0c..69ebd010ba 100644
--- a/sysdeps/x86_64/fpu/multiarch/s_truncf.c
+++ b/sysdeps/x86_64/fpu/multiarch/s_truncf.c
@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#define NO_MATH_REDIRECT
 #include <libm-alias-float.h>
 
 #define truncf __redirect_truncf